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The River Thames ( ), known alternatively in parts as the
River Isis "The Isis" () is an alternative name for the River Thames, used from its source in the Cotswolds until it is joined by the Thame at Dorchester in Oxfordshire. It derives from the ancient name for the Thames, ''Tamesis'', which in the Midd ...
, is a river that flows through
southern England Southern England, or the South of England, also known as the South, is an area of England consisting of its southernmost part, with cultural, economic and political differences from the Midlands and the North. Officially, the area includes G ...
including
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...
. At , it is the longest river entirely in England and the second-longest in the United Kingdom, after the
River Severn , name_etymology = , image = SevernFromCastleCB.JPG , image_size = 288 , image_caption = The river seen from Shrewsbury Castle , map = RiverSevernMap.jpg , map_size = 288 , map_c ...
. The river rises at
Thames Head Thames Head is a group of seasonal springs that arise near the village of Coates in the Cotswolds, about three miles south-west of the town of Cirencester, in the county of Gloucestershire, England. The spring water comes from the limestone ...
in
Gloucestershire Gloucestershire ( abbreviated Glos) is a county in South West England. The county comprises part of the Cotswold Hills, part of the flat fertile valley of the River Severn and the entire Forest of Dean. The county town is the city of Gl ...
, and flows into the
North Sea The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian S ...
near
Tilbury Tilbury is a port town in the borough of Thurrock, Essex, England. The present town was established as separate settlement in the late 19th century, on land that was mainly part of Chadwell St Mary. It contains a 16th century fort and an ancie ...
, Essex and
Gravesend Gravesend is a town in northwest Kent, England, situated 21 miles (35 km) east-southeast of Charing Cross (central London) on the Bank (geography), south bank of the River Thames and opposite Tilbury in Essex. Located in the diocese of Ro ...
, Kent, via the
Thames Estuary The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain. Limits An estuary can be defined according to different criteria (e.g. tidal, geographical, navigational or in terms of salini ...
. From the west it flows through
Oxford Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...
(where it is sometimes called the Isis),
Reading Reading is the process of taking in the sense or meaning of Letter (alphabet), letters, symbols, etc., especially by Visual perception, sight or Somatosensory system, touch. For educators and researchers, reading is a multifaceted process invo ...
,
Henley-on-Thames Henley-on-Thames ( ) is a town and civil parish on the River Thames in Oxfordshire, England, northeast of Reading, west of Maidenhead, southeast of Oxford and west of London (by road), near the tripoint of Oxfordshire, Berkshire and Buc ...
and
Windsor Windsor may refer to: Places Australia * Windsor, New South Wales ** Municipality of Windsor, a former local government area * Windsor, Queensland, a suburb of Brisbane, Queensland **Shire of Windsor, a former local government authority around Wi ...
. The Thames also drains the whole of
Greater London Greater may refer to: *Greatness, the state of being great *Greater than, in inequality (mathematics), inequality *Greater (film), ''Greater'' (film), a 2016 American film *Greater (flamingo), the oldest flamingo on record *Greater (song), "Greate ...
. In August 2022, the source of the river moved five miles to beyond
Somerford Keynes Somerford Keynes (, ) is a village and civil parish in Gloucestershire, England, close to the River Thames and about 5 miles (8 km) from its source. It lies on the boundary with Wiltshire, midway between Cirencester, Swindon and Malmesbury. The ...
due to the heatwave in July 2022. The lower reaches of the river are called the
Tideway The Tideway is a part of the River Thames in England which is subject to tides. This stretch of water is downstream from Teddington Lock. The Tideway comprises the upper Thames Estuary including the Pool of London. Tidal activity Depending on ...
, derived from its long
tidal reach A reach is a segment of a stream, river, or arm of the sea, usually suggesting a straight, level, uninterrupted stretch. They are traditionally defined by the capabilities of sailing boats, as a stretch of a watercourse which, because it is strai ...
up to
Teddington Lock Teddington Lock is a complex of three lock (water transport), locks and a weir on the River Thames between Ham, London, Ham and Teddington in the London Borough of Richmond upon Thames, England. Historically in Middlesex, it was first buil ...
. Its tidal section includes most of its London stretch and has a rise and fall of . From Oxford to the Estuary the Thames drops by 55 metres. Running through some of the drier parts of mainland Britain and heavily abstracted for drinking water, the Thames' discharge is low considering its length and breadth: the Severn has a discharge almost twice as large on average despite having a smaller
drainage basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, t ...
. In
Scotland Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the ...
, the
Tay Tay may refer to: People and languages * Tay (name), including lists of people with the given name, surname and nickname * Tay people, an ethnic group of Vietnam ** Tày language *Atayal language, an Austronesian language spoken in Taiwan (ISO 639 ...
achieves more than double the Thames' average discharge from a drainage basin that is 60% smaller. Along its course are 45
navigation lock A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber in which the water lev ...
s with accompanying
weir A weir or low head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level. Weirs are also used to control the flow of water for outlets of l ...
s. Its
catchment area In human geography, a catchment area is the area from which a location, such as a city, service or institution, attracts a population that uses its services and economic opportunities. Catchment areas may be defined based on from where people are ...
covers a large part of south-eastern and a small part of western England; the river is fed by at least 50 named tributaries. The river contains over 80 islands. With its waters varying from freshwater to almost seawater, the Thames supports a variety of wildlife and has a number of adjoining
Sites of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle of ...
, with the largest being in the
North Kent Marshes The North Kent Marshes are in the far north of the county of Kent spanning dry and wet south banks and inlets of the Thames Estuary in south-east England. The marshes are one of 22 Environmentally Sensitive Areas recognised by the UK's Departmen ...
and covering .


Etymology

According to Mallory and Adams, the Thames, from
Middle English Middle English (abbreviated to ME) is a form of the English language that was spoken after the Norman conquest of 1066, until the late 15th century. The English language underwent distinct variations and developments following the Old English p ...
''Temese'', is derived from the
Brittonic Brittonic or Brythonic may refer to: *Common Brittonic, or Brythonic, the Celtic language anciently spoken in Great Britain *Brittonic languages, a branch of the Celtic languages descended from Common Brittonic *Britons (Celtic people) The Br ...
name for the river, ''Tamesas'' (from *''tamēssa''),Mallory, J.P. and D.Q. Adams (1947). ''The Encyclopedia of Indo-European Culture''. London: Fitzroy and Dearborn. p. 147. recorded in Latin as ''Tamesis'' and yielding modern Welsh ''Tafwys'' "Thames". The name may have meant "dark" and can be compared to other
cognate In historical linguistics, cognates or lexical cognates are sets of words in different languages that have been inherited in direct descent from an etymology, etymological ancestor in a proto-language, common parent language. Because language c ...
s such as Russian темно (
Proto-Slavic Proto-Slavic (abbreviated PSl., PS.; also called Common Slavic or Common Slavonic) is the Attested language, unattested, linguistic reconstruction, reconstructed proto-language of all Slavic languages. It represents Slavic speech approximately ...
*''tĭmĭnŭ''), Lithuanian ''tamsi'' "dark", Latvian ''tumsa'' "darkness",
Sanskrit Sanskrit (; attributively , ; nominally , , ) is a classical language belonging to the Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had diffused there from the northwest in the late ...
'' tamas'' and Welsh ''tywyll'' "darkness" and
Middle Irish Middle Irish, sometimes called Middle Gaelic ( ga, An Mheán-Ghaeilge, gd, Meadhan-Ghàidhlig), is the Goidelic language which was spoken in Ireland, most of Scotland and the Isle of Man from AD; it is therefore a contemporary of late Old Engli ...
''teimen'' "dark grey". The origin is shared by many other river names in Britain, such as the
River Tamar The Tamar (; kw, Dowr Tamar) is a river in south west England, that forms most of the border between Devon (to the east) and Cornwall (to the west). A part of the Tamar Valley is a World Heritage Site due to its historic mining activities. T ...
at the border of
Devon Devon ( , historically known as Devonshire , ) is a ceremonial and non-metropolitan county in South West England. The most populous settlement in Devon is the city of Plymouth, followed by Devon's county town, the city of Exeter. Devon is ...
and
Cornwall Cornwall (; kw, Kernow ) is a historic county and ceremonial county in South West England. It is recognised as one of the Celtic nations, and is the homeland of the Cornish people. Cornwall is bordered to the north and west by the Atlantic ...
, several rivers named Tame in
the Midlands The Midlands (also referred to as Central England) are a part of England that broadly correspond to the Kingdom of Mercia of the Early Middle Ages, bordered by Wales, Northern England and Southern England. The Midlands were important in the Ind ...
and
North Yorkshire North Yorkshire is the largest ceremonial counties of England, ceremonial county (lieutenancy area) in England, covering an area of . Around 40% of the county is covered by National parks of the United Kingdom, national parks, including most of ...
, the Tavy on
Dartmoor Dartmoor is an upland area in southern Devon, England. The moorland and surrounding land has been protected by National Park status since 1951. Dartmoor National Park covers . The granite which forms the uplands dates from the Carboniferous ...
, the
Team A team is a group of individuals (human or non-human) working together to achieve their goal. As defined by Professor Leigh Thompson (academic), Leigh Thompson of the Kellogg School of Management, " team is a group of people who are interde ...
of the North East, the
Teifi , name_etymology = , image = File:Llyn Teifi - geograph.org.uk - 41773.jpg , image_size = , image_caption = Llyn Teifi, the source of the Teifi , map = , map_size = , map_caption ...
and
Teme The River Teme (pronounced ; cy, Afon Tefeidiad) rises in Mid Wales, south of Newtown, and flows southeast roughly forming the border between England and Wales for several miles through Knighton before entering England in the vicinity of ...
of
Wales Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England border, east, the Irish Sea to the north and west, the Celtic Sea to the south west and the ...
, the Teviot in the
Scottish Borders The Scottish Borders ( sco, the Mairches, 'the Marches'; gd, Crìochan na h-Alba) is one of 32 council areas of Scotland. It borders the City of Edinburgh, Dumfries and Galloway, East Lothian, Midlothian, South Lanarkshire, West Lothi ...
and a Thames tributary the
Thame Thame is a market town and civil parish in Oxfordshire, about east of the city of Oxford and southwest of Aylesbury. It derives its name from the River Thame which flows along the north side of the town and forms part of the county border wi ...
.
Kenneth H. Jackson Prof Kenneth Hurlstone Jackson CBE FRSE FSA DLitt (1 November 1909 – 20 February 1991) was an English linguistics, linguist and a translator who specialised in the Celtic languages. He demonstrated how the text of the Ulster Cycle of tales, wr ...
proposed that the name of the Thames is not
Indo-European The Indo-European languages are a language family native to the overwhelming majority of Europe, the Iranian plateau, and the northern Indian subcontinent. Some European languages of this family, English, French, Portuguese, Russian, Dutc ...
(and of unknown meaning), while Peter Kitson suggested that it is Indo-European but originated before the
Britons British people or Britons, also known colloquially as Brits, are the citizens of the United Kingdom of Great Britain and Northern Ireland, the British Overseas Territories, and the Crown dependencies.: British nationality law governs mod ...
and has a name indicating "muddiness" from a root ''*tā-'', 'melt'. Indirect evidence for the antiquity of the name 'Thames' is provided by a Roman potsherd found at Oxford, bearing the inscription ''Tamesubugus fecit'' (Tamesubugus made
his His or HIS may refer to: Computing * Hightech Information System, a Hong Kong graphics card company * Honeywell Information Systems * Hybrid intelligent system * Microsoft Host Integration Server Education * Hangzhou International School, in ...
. It is believed that Tamesubugus' name was derived from that of the river. Tamese was referred to as a place, not a river in the
Ravenna Cosmography The ''Ravenna Cosmography'' ( la, Ravennatis Anonymi Cosmographia,  "The Cosmography of the Unknown Ravennese") is a list of place-names covering the world from India to Ireland, compiled by an anonymous cleric in Ravenna around 700 AD. Text ...
(c. AD 700). The river's name has always been pronounced with a simple ''t'' /t/; the
Middle English Middle English (abbreviated to ME) is a form of the English language that was spoken after the Norman conquest of 1066, until the late 15th century. The English language underwent distinct variations and developments following the Old English p ...
spelling was typically ''Temese'' and the Brittonic form ''Tamesis''. A similar spelling from 1210, "Tamisiam" (the accusative case of "Tamisia", see Kingston upon Thames#Early history), is found in the
Magna Carta (Medieval Latin for "Great Charter of Freedoms"), commonly called (also ''Magna Charta''; "Great Charter"), is a royal charter of rights agreed to by King John of England at Runnymede, near Windsor, on 15 June 1215. First drafted by the ...
. The Thames through
Oxford Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...
is sometimes called
the Isis "The Isis" () is an alternative name for the River Thames, used from its source in the Cotswolds until it is joined by the Thame at Dorchester in Oxfordshire. It derives from the ancient name for the Thames, ''Tamesis'', which in the Middle ...
. Historically, and especially in Victorian times, gazetteers and cartographers insisted that the entire river was correctly named the Isis from its source down to
Dorchester on Thames Dorchester on Thames (or Dorchester-on-Thames) is a village and civil parish in Oxfordshire, about northwest of Wallingford and southeast of Oxford. The town is a few hundred yards from the confluence of the River Thames and River Thame. A c ...
and that only from this point, where the river meets the Thame and becomes the "Thame-isis" (supposedly subsequently abbreviated to Thames) should it be so called.
Ordnance Survey , nativename_a = , nativename_r = , logo = Ordnance Survey 2015 Logo.svg , logo_width = 240px , logo_caption = , seal = , seal_width = , seal_caption = , picture = , picture_width = , picture_caption = , formed = , preceding1 = , di ...
maps still label the Thames as "River Thames or Isis" down to Dorchester. Since the early 20th century this distinction has been lost in common usage outside of Oxford, and some historians suggest the name ''Isis'' is nothing more than a
truncation In mathematics and computer science, truncation is limiting the number of digits right of the decimal point. Truncation and floor function Truncation of positive real numbers can be done using the floor function. Given a number x \in \mathbb ...
of ''Tamesis'', the
Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
name for the Thames. Sculptures titled ''Tamesis'' and ''
Isis Isis (; ''Ēse''; ; Meroitic: ''Wos'' 'a''or ''Wusa''; Phoenician: 𐤀𐤎, romanized: ʾs) was a major goddess in ancient Egyptian religion whose worship spread throughout the Greco-Roman world. Isis was first mentioned in the Old Kingd ...
'' by
Anne Seymour Damer Anne Seymour Damer, ''née'' Conway, (26 October 1748 – 28 May 1828) was an English sculptor. Once described as a 'female genius' by Horace Walpole, she was trained in sculpture by Giuseppe Ceracchi and John Bacon. Influenced by the Enlighten ...
can be found on the
bridge A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually somethi ...
at
Henley-on-Thames Henley-on-Thames ( ) is a town and civil parish on the River Thames in Oxfordshire, England, northeast of Reading, west of Maidenhead, southeast of Oxford and west of London (by road), near the tripoint of Oxfordshire, Berkshire and Buc ...
,
Oxfordshire Oxfordshire is a ceremonial and non-metropolitan county in the north west of South East England. It is a mainly rural county, with its largest settlement being the city of Oxford. The county is a centre of research and development, primarily ...
(the original terracotta and plaster models were exhibited at the
Royal Academy The Royal Academy of Arts (RA) is an art institution based in Burlington House on Piccadilly in London. Founded in 1768, it has a unique position as an independent, privately funded institution led by eminent artists and architects. Its pur ...
,
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...
, in 1785. They are now on show at the
River and Rowing Museum The River & Rowing Museum in Henley-on-Thames, Oxfordshire, England, is located on a site at Mill Meadows by the River Thames. It has three main themes represented by major permanent galleries, the non-tidal River Thames, the international ...
in Henley).
Richard Coates Richard Coates (born 16 April 1949, in Grimsby, Lincolnshire, and educated at Wintringham School) is an English linguist. He was Professor of Linguistics (alternatively Professor of Onomastics) at the University of the West of England, Bristo ...
suggests that while the river was as a whole called the Thames, part of it, where it was too wide to ford, was called *''(p)lowonida''. This gave the name to a settlement on its banks, which became known as
Londinium Londinium, also known as Roman London, was the capital of Roman Britain during most of the period of Roman rule. It was originally a settlement established on the current site of the City of London around AD 47–50. It sat at a key cross ...
, from the Indo-European roots *''pleu-'' "flow" and *''-nedi'' "river" meaning something like the flowing river or the wide flowing unfordable river. The river gives its name to three informal areas: the
Thames Valley The Thames Valley is an informally-defined sub-region of South East England, centred on the River Thames west of London, with Oxford as a major centre. Its boundaries vary with context. The area is a major tourist destination and economic hub, ...
, a region of England around the river between Oxford and West London; the
Thames Gateway Thames Gateway is a term applied to an area around the Thames Estuary in the context of discourse around regeneration and further urbanisation. The term was first coined by the UK government and applies to an area of land stretching east from ...
; and the greatly overlapping
Thames Estuary The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain. Limits An estuary can be defined according to different criteria (e.g. tidal, geographical, navigational or in terms of salini ...
around the tidal Thames to the east of London and including the waterway itself.
Thames Valley Police Thames Valley Police is the territorial police force responsible for policing the Thames Valley, covering the counties of Berkshire, Buckinghamshire and Oxfordshire. It the largest non-metropolitan police force in England and Wales, covering a ...
is a formal body that takes its name from the river, covering three
counties A county is a geographic region of a country used for administrative or other purposesChambers Dictionary, L. Brookes (ed.), 2005, Chambers Harrap Publishers Ltd, Edinburgh in certain modern nations. The term is derived from the Old French ...
. In non-administrative use, the river's name is used in those of
Thames Valley University The University of West London (UWL) is a public research university in the United Kingdom with campuses in Ealing, Brentford, and in Reading, Berkshire. The university has roots in 1860, when the Lady Byron School was founded, later Ealing C ...
,
Thames Water Thames Water Utilities Ltd, known as Thames Water, is a large private utility company responsible for the public water supply and waste water treatment in most of Greater London, Luton, the Thames Valley, Surrey, Gloucestershire, north Wiltsh ...
,
Thames Television Thames Television, commonly simplified to just Thames, was a Broadcast license, franchise holder for a region of the British ITV (TV network), ITV television network serving Greater London, London and surrounding areas from 30 July 1968 until th ...
, publishing company
Thames & Hudson Thames & Hudson (sometimes T&H for brevity) is a publisher of illustrated books in all visually creative categories: art, architecture, design, photography, fashion, film, and the performing arts. It also publishes books on archaeology, history, ...
,
Thameslink Thameslink is a 24-hour main-line route in the British railway system, running from , , , and via central London to Sutton, , , Rainham, , , , and . The network opened as a through service in 1988, with severe overcrowding by 1998, carrying m ...
(north–south rail service passing through
central London Central London is the innermost part of London, in England, spanning several boroughs. Over time, a number of definitions have been used to define the scope of Central London for statistics, urban planning and local government. Its characteris ...
) and
South Thames College South Thames Colleges Group (STCG) is a large further education institution operating four colleges in south-west London: South Thames College, Kingston College, Merton College, and Carshalton College. The four main campuses are in Wandsworth, ...
. An example of its use in the names of historic entities is the
Thames Ironworks and Shipbuilding Company The Thames Ironworks and Shipbuilding Company, Limited was a shipyard and iron works straddling the mouth of Bow Creek at its confluence with the River Thames, at Leamouth Wharf (often referred to as Blackwall) on the west side and at Cann ...
.


Administration

The administrative powers of the
Thames Conservancy The Thames Conservancy (formally the Conservators of the River Thames) was a body responsible for the management of the that river in England. It was founded in 1857 to replace the jurisdiction of the City of London up to Staines. Nine years la ...
to control river traffic and manage flows have been taken on with some modifications by the
Environment Agency The Environment Agency (EA) is a non-departmental public body, established in 1996 and sponsored by the United Kingdom government's Department for Environment, Food and Rural Affairs, with responsibilities relating to the protection and enha ...
and, in respect of the Tideway part of the river, such powers are split between the agency and the Port of London Authority.


Human activity

The marks of human activity, in some cases dating back to Pre-Roman Britain, are visible at various points along the river. These include a variety of structures connected with use of the river, such as navigations, bridges and
watermill A watermill or water mill is a mill that uses hydropower. It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding), rolling, or hammering. Such processes are needed in the production of ...
s, as well as prehistoric
burial mound Burial, also known as interment or inhumation, is a method of final disposition whereby a dead body is placed into the ground, sometimes with objects. This is usually accomplished by excavating a pit or trench, placing the deceased and objec ...
s. The lower Thames in the Roman era was a shallow waterway winding through marshes. But centuries of human intervention have transformed it into a deep tidal canal flowing between 200 miles of solid walls; these defend a floodplain where 1.5 million people work and live. A major maritime route is formed for much of its length for shipping and supplies: through the
Port of London The Port of London is that part of the River Thames in England lying between Teddington Lock and the defined boundary (since 1968, a line drawn from Foulness Point in Essex via Gunfleet Old Lighthouse to Warden Point in Kent) with the North Sea ...
for international trade, internally along its length and by its connection to the British canal system. The river's position has put it at the centre of many events in British history, leading to it being described by
John Burns John Elliot Burns (20 October 1858 – 24 January 1943) was an English trade unionist and politician, particularly associated with London politics and Battersea. He was a socialist and then a Liberal Member of Parliament and Minister. He was ...
as "liquid history". Two broad canals link the river to other
river basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the ...
s: the
Kennet and Avon Canal The Kennet and Avon Canal is a waterway in southern England with an overall length of , made up of two lengths of navigable river linked by a canal. The name is used to refer to the entire length of the navigation rather than solely to the cent ...
(
Reading Reading is the process of taking in the sense or meaning of Letter (alphabet), letters, symbols, etc., especially by Visual perception, sight or Somatosensory system, touch. For educators and researchers, reading is a multifaceted process invo ...
to Bath) and the
Grand Union Canal The Grand Union Canal in England is part of the British canal system. It is the principal navigable waterway between London and the Midlands. Starting in London, one arm runs to Leicester and another ends in Birmingham, with the latter st ...
(London to the Midlands). The Grand Union effectively bypassed the earlier, narrow and winding
Oxford Canal The Oxford Canal is a narrowboat canal in central England linking the City of Oxford with the Coventry Canal at Hawkesbury (just north of Coventry and south of Bedworth) via Banbury and Rugby. Completed in 1790, it connects to the River Thame ...
which also remains open as a popular scenic recreational route. Three further cross-basin canals are disused but are in various stages of reconstruction: the
Thames and Severn Canal The Thames and Severn Canal is a canal in Gloucestershire in the south-west of England, which was completed in 1789. It was conceived as part of a cargo route from Bristol and the Midlands to London, linking England's two largest rivers for bett ...
(via
Stroud Stroud is a market town and civil parish in Gloucestershire, England. It is the main town in Stroud District. The town's population was 13,500 in 2021. Below the western escarpment of the Cotswold Hills, at the meeting point of the Five ...
), which operated until 1927 (to the west coast of England), the
Wey and Arun Canal The Wey and Arun Canal is a partially open, 23-mile-long (37 km) canal in the southeast of England. It runs southwards from the River Wey at Gunsmouth in Shalford, Surrey to the River Arun at Pallingham, in West Sussex. The canal compri ...
to
Littlehampton Littlehampton is a town, seaside resort, and pleasure harbour, and the most populous civil parish in the Arun District of West Sussex, England. It lies on the English Channel on the eastern bank of the mouth of the River Arun. It is south sout ...
, which operated until 1871 (to the south coast), and the
Wilts and Berks Canal The Wilts & Berks Canal is a canal in the historic counties of Wiltshire and Berkshire, England, linking the Kennet and Avon Canal at Semington near Melksham, to the River Thames at Abingdon. The North Wilts Canal merged with it to become a b ...
.
Rowing Rowing is the act of propelling a human-powered watercraft using the sweeping motions of oars to displace water and generate reactional propulsion. Rowing is functionally similar to paddling, but rowing requires oars to be mechanically atta ...
and sailing clubs are common along the Thames, which is navigable to such vessels.
Kayaking Kayaking is the use of a kayak for moving over water. It is distinguished from canoeing by the sitting position of the paddler and the number of blades on the paddle. A kayak is a low-to-the-water, canoe-like boat in which the paddler sits fac ...
and
canoeing Canoeing is an activity which involves paddling a canoe with a single-bladed paddle. Common meanings of the term are limited to when the canoeing is the central purpose of the activity. Broader meanings include when it is combined with other acti ...
also take place. Major annual events include the
Henley Royal Regatta Henley Royal Regatta (or Henley Regatta, its original name pre-dating Royal patronage) is a rowing event held annually on the River Thames by the town of Henley-on-Thames, England. It was established on 26 March 1839. It differs from the thre ...
and
the Boat Race The Boat Race is an annual set of rowing races between the Cambridge University Boat Club and the Oxford University Boat Club, traditionally rowed between open-weight eights on the River Thames in London, England. There are separate men's ...
, while the Thames has been used during two
Summer Olympic Games The Summer Olympic Games (french: link=no, Jeux olympiques d'été), also known as the Games of the Olympiad, and often referred to as the Summer Olympics, is a major international multi-sport event normally held once every four years. The inau ...
: 1908 (
rowing Rowing is the act of propelling a human-powered watercraft using the sweeping motions of oars to displace water and generate reactional propulsion. Rowing is functionally similar to paddling, but rowing requires oars to be mechanically atta ...
) and 1948 (
rowing Rowing is the act of propelling a human-powered watercraft using the sweeping motions of oars to displace water and generate reactional propulsion. Rowing is functionally similar to paddling, but rowing requires oars to be mechanically atta ...
and
canoeing Canoeing is an activity which involves paddling a canoe with a single-bladed paddle. Common meanings of the term are limited to when the canoeing is the central purpose of the activity. Broader meanings include when it is combined with other acti ...
). Safe headwaters and reaches are a summer venue for organised swimming, which is prohibited on safety grounds in a stretch centred on
Central London Central London is the innermost part of London, in England, spanning several boroughs. Over time, a number of definitions have been used to define the scope of Central London for statistics, urban planning and local government. Its characteris ...
.


Physical and natural aspects

The usually quoted
source Source may refer to: Research * Historical document * Historical source * Source (intelligence) or sub source, typically a confidential provider of non open-source intelligence * Source (journalism), a person, publication, publishing institute o ...
of the Thames is at
Thames Head Thames Head is a group of seasonal springs that arise near the village of Coates in the Cotswolds, about three miles south-west of the town of Cirencester, in the county of Gloucestershire, England. The spring water comes from the limestone ...
(at ). This is about north of Kemble parish church in southern
Gloucestershire Gloucestershire ( abbreviated Glos) is a county in South West England. The county comprises part of the Cotswold Hills, part of the flat fertile valley of the River Severn and the entire Forest of Dean. The county town is the city of Gl ...
, near the town of
Cirencester Cirencester (, ; see below for more variations) is a market town in Gloucestershire, England, west of London. Cirencester lies on the River Churn, a tributary of the River Thames, and is the largest town in the Cotswolds. It is the home of ...
, in the
Cotswolds The Cotswolds (, ) is a region in central-southwest England, along a range of rolling hills that rise from the meadows of the upper Thames to an escarpment above the Severn Valley and Evesham Vale. The area is defined by the bedrock of Jur ...
. However, Seven Springs near
Cheltenham Cheltenham (), also known as Cheltenham Spa, is a spa town and borough on the edge of the Cotswolds in the county of Gloucestershire, England. Cheltenham became known as a health and holiday spa town resort, following the discovery of mineral s ...
, where the
Churn Churn may refer to: * Churn drill, large-diameter drilling machine large holes appropriate for holes in the ground Dairy-product terms * Butter churn, device for churning butter * Churning (butter), the process of creating butter out of mil ...
(which feeds into the Thames near
Cricklade Cricklade is a town and civil parish on the River Thames in north Wiltshire, England, midway between Swindon and Cirencester. It is the first downstream town on the Thames. The parish population at the 2011 census was 4,227. History Cricklade ...
) rises, is also sometimes quoted as the Thames' source, as this location is farthest from the mouth, and adds some to the river's length. At Seven Springs above the source is a stone with the Latin
hexameter Hexameter is a metrical line of verses consisting of six feet (a "foot" here is the pulse, or major accent, of words in an English line of poetry; in Greek and Latin a "foot" is not an accent, but describes various combinations of syllables). It w ...
inscription "Hic tuus o Tamesine pater septemgeminus fons", which means "Here, O Father Thames, syour sevenfold source". The springs at Seven Springs flow throughout the year, while those at Thames Head are only seasonal (a winterbourne). With a length of , the Thames is the longest river entirely in England. (The longest river in the United Kingdom, the
Severn , name_etymology = , image = SevernFromCastleCB.JPG , image_size = 288 , image_caption = The river seen from Shrewsbury Castle , map = RiverSevernMap.jpg , map_size = 288 , map_c ...
, flows partly in
Wales Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England border, east, the Irish Sea to the north and west, the Celtic Sea to the south west and the ...
.) However, as the River Churn, sourced at Seven Springs, is longer than the section of the Thames from its traditional source at Thames Head to the confluence, the overall length of the Thames measured from Seven Springs, at , is greater than the Severn's length of . Thus, the "Churn/Thames" river may be regarded as the longest natural river in the United Kingdom. The stream from Seven Springs is joined at
Coberley Coberley is a village and civil parish in the Cotswold District of Gloucestershire in England, south of Cheltenham. It lies at the confluence of several streams ( Seven Springs) that form the River Churn, a tributary of the River Thames. The m ...
by a longer tributary which could further increase the length of the Thames, with its source in the grounds of the
National Star College The National Star College (previously known as the Star Centre) is an independent specialist further education college for people with physical disabilities, acquired brain injuries and associated learning difficulties. It is based at Ullenwood ...
at
Ullenwood Ullenwood is a village in the Coberley civil parish, near Cheltenham in Gloucestershire. It is the site of a formerly secret civil defence bunker intended as a Regional Seat of Government in the event of nuclear war. It is the site of the form ...
. The Thames flows through or alongside
Ashton Keynes Ashton Keynes is a village and civil parish in north Wiltshire, England which borders with Gloucestershire. The village is about south of Cirencester and west of Cricklade. At the 2011 census the population of the parish, which includes the ...
,
Cricklade Cricklade is a town and civil parish on the River Thames in north Wiltshire, England, midway between Swindon and Cirencester. It is the first downstream town on the Thames. The parish population at the 2011 census was 4,227. History Cricklade ...
,
Lechlade Lechlade () is a town at the southern edge of the Cotswolds in Gloucestershire, England, south of Birmingham and west of London. It is the highest point at which the River Thames is navigable, although there is a right of navigation that contin ...
,
Oxford Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...
,
Abingdon-on-Thames Abingdon-on-Thames ( ), commonly known as Abingdon, is a historic market town and civil parish in the Ceremonial counties of England, ceremonial county of Oxfordshire, England, on the River Thames. Historic counties of England, Historically the ...
, Wallingford,
Goring-on-Thames Goring-on-Thames (or Goring) is a village and civil parish on the River Thames in South Oxfordshire, England, about south of Wallingford and northwest of Reading. It had a population of 3,187 in the 2011 census, put at 3,335 in 2019. Goring ...
and Streatley,
Pangbourne Pangbourne is a large village and civil parishes in England, civil parish on the River Thames in Berkshire, England. Pangbourne has its own shops, schools, Pangbourne railway station, a railway station on the Great Western main line and a vill ...
and
Whitchurch-on-Thames Whitchurch-on-Thames is a village and civil parish on the Oxfordshire bank of the River Thames, about northwest of Reading, Berkshire, in close proximity to Whitchurch Hill. Opposite Whitchurch on the Berkshire bank is the village of Pangbour ...
,
Reading Reading is the process of taking in the sense or meaning of Letter (alphabet), letters, symbols, etc., especially by Visual perception, sight or Somatosensory system, touch. For educators and researchers, reading is a multifaceted process invo ...
,
Wargrave Wargrave () is a historic village and civil parish in Berkshire, England. The village is primarily on the River Thames but also along the confluence of the River Loddon and lies on the border with southern Oxfordshire. The village has many old ...
,
Henley-on-Thames Henley-on-Thames ( ) is a town and civil parish on the River Thames in Oxfordshire, England, northeast of Reading, west of Maidenhead, southeast of Oxford and west of London (by road), near the tripoint of Oxfordshire, Berkshire and Buc ...
, Marlow,
Maidenhead Maidenhead is a market town in the Royal Borough of Windsor and Maidenhead in the county of Berkshire, England, on the southwestern bank of the River Thames. It had an estimated population of 70,374 and forms part of the border with southern Bu ...
,
Windsor Windsor may refer to: Places Australia * Windsor, New South Wales ** Municipality of Windsor, a former local government area * Windsor, Queensland, a suburb of Brisbane, Queensland **Shire of Windsor, a former local government authority around Wi ...
and
Eton Eton most commonly refers to Eton College, a public school in Eton, Berkshire, England. Eton may also refer to: Places *Eton, Berkshire, a town in Berkshire, England * Eton, Georgia, a town in the United States * Éton, a commune in the Meuse dep ...
,
Staines-upon-Thames Staines-upon-Thames is a market town in northwest Surrey, England, around west of central London. It is in the Borough of Spelthorne, at the confluence of the River Thames and Colne. Historically part of Middlesex, the town was transferred to ...
and
Egham Egham ( ) is a university town in the Borough of Runnymede in Surrey, England, approximately west of central London. First settled in the Bronze Age, the town was under the control of Chertsey Abbey for much of the Middle Ages. In 1215, Magna ...
,
Chertsey Chertsey is a town in the Borough of Runnymede, Surrey, England, south-west of central London. It grew up round Chertsey Abbey, founded in 666 CE, and gained a market charter from Henry I. A bridge across the River Thames first appeared in the ...
,
Shepperton Shepperton is an urban village in the Borough of Spelthorne, Surrey, approximately south west of central London. Shepperton is equidistant between the towns of Chertsey and Sunbury-on-Thames. The village is mentioned in a document of 959 AD ...
,
Weybridge Weybridge () is a town in the Borough of Elmbridge in Surrey, England, around southwest of central London. The settlement is recorded as ''Waigebrugge'' and ''Weibrugge'' in the 7th century and the name derives from a crossing point of the ...
,
Sunbury-on-Thames Sunbury-on-Thames (or commonly Sunbury) is a suburban town on the north bank of the River Thames in the Borough of Spelthorne, Surrey, centred southwest of central London. Historically part of the county of Middlesex, in 1965 Sunbury and other ...
,
Walton-on-Thames Walton-on-Thames, locally known as Walton, is a market town on the south bank of the Thames in the Elmbridge borough of Surrey, England. Walton forms part of the Greater London built-up area, within the KT postcode and is served by a wide ran ...
,
Molesey Molesey is a district of two twin towns, East Molesey and West Molesey, in the Borough of Elmbridge, Surrey, England, and is situated on the south bank of the River Thames. East and West Molesey share a high street, and there is a second retai ...
and
Thames Ditton Thames Ditton is a suburban village on the River Thames, in the Elmbridge borough of Surrey, England. Apart from a large inhabited island in the river, it lies on the southern bank, centred 12.2 miles (19.6 km) southwest of Charing Cross ...
. The river was subject to minor redefining and widening of the main channel around Oxford, Abingdon and Marlow before 1850, since when further cuts to ease navigation have reduced distances further.
Molesey Molesey is a district of two twin towns, East Molesey and West Molesey, in the Borough of Elmbridge, Surrey, England, and is situated on the south bank of the River Thames. East and West Molesey share a high street, and there is a second retai ...
faces
Hampton Hampton may refer to: Places Australia *Hampton bioregion, an IBRA biogeographic region in Western Australia *Hampton, New South Wales *Hampton, Queensland, a town in the Toowoomba Region * Hampton, Victoria Canada * Hampton, New Brunswick *Ha ...
, and in
Greater London Greater may refer to: *Greatness, the state of being great *Greater than, in inequality (mathematics), inequality *Greater (film), ''Greater'' (film), a 2016 American film *Greater (flamingo), the oldest flamingo on record *Greater (song), "Greate ...
the Thames passes
Hampton Court Palace Hampton Court Palace is a Grade I listed royal palace in the London Borough of Richmond upon Thames, southwest and upstream of central London on the River Thames. The building of the palace began in 1514 for Cardinal Thomas Wolsey, the chie ...
,
Surbiton Surbiton is a suburban neighbourhood in South West London, within the Royal Borough of Kingston upon Thames (RBK). It is next to the River Thames, southwest of Charing Cross. Surbiton was in the historic county of Surrey and since 1965 it has ...
,
Kingston upon Thames Kingston upon Thames (hyphenated until 1965, colloquially known as Kingston) is a town in the Royal Borough of Kingston upon Thames, southwest London, England. It is situated on the River Thames and southwest of Charing Cross. It is notable as ...
,
Teddington Teddington is a suburb in south-west London in the London Borough of Richmond upon Thames. In 2021, Teddington was named as the best place to live in London by ''The Sunday Times''. Historically in Middlesex, Teddington is situated on a long m ...
,
Twickenham Twickenham is a suburban district in London, England. It is situated on the River Thames southwest of Charing Cross. Historically part of Middlesex, it has formed part of the London Borough of Richmond upon Thames since 1965, and the boroug ...
,
Richmond Richmond most often refers to: * Richmond, Virginia, the capital of Virginia, United States * Richmond, London, a part of London * Richmond, North Yorkshire, a town in England * Richmond, British Columbia, a city in Canada * Richmond, California, ...
(with a famous view of the Thames from Richmond Hill), Syon House,
Kew Kew () is a district in the London Borough of Richmond upon Thames. Its population at the 2011 census was 11,436. Kew is the location of the Royal Botanic Gardens ("Kew Gardens"), now a World Heritage Site, which includes Kew Palace. Kew is a ...
,
Brentford Brentford is a suburban town in West London, England and part of the London Borough of Hounslow. It lies at the confluence of the River Brent and the Thames, west of Charing Cross. Its economy has diverse company headquarters buildings whi ...
,
Chiswick Chiswick ( ) is a district of west London, England. It contains Hogarth's House, the former residence of the 18th-century English artist William Hogarth; Chiswick House, a neo-Palladian villa regarded as one of the finest in England; and Full ...
,
Barnes Barnes may refer to: People * Barnes (name), a family name and a given name (includes lists of people with that name) Places United Kingdom *Barnes, London, England **Barnes railway station ** Barnes Bridge railway station ** Barnes Railway Bri ...
,
Hammersmith Hammersmith is a district of West London, England, southwest of Charing Cross. It is the administrative centre of the London Borough of Hammersmith and Fulham, and identified in the London Plan as one of 35 major centres in Greater London. ...
,
Fulham Fulham () is an area of the London Borough of Hammersmith & Fulham in West London, England, southwest of Charing Cross. It lies on the north bank of the River Thames, bordering Hammersmith, Kensington and Chelsea. The area faces Wandsworth ...
,
Putney Putney () is a district of southwest London, England, in the London Borough of Wandsworth, southwest of Charing Cross. The area is identified in the London Plan as one of 35 major centres in Greater London. History Putney is an ancient paris ...
,
Wandsworth Wandsworth Town () is a district of south London, within the London Borough of Wandsworth southwest of Charing Cross. The area is identified in the London Plan The London Plan is the statutory spatial development strategy for the Gre ...
,
Battersea Battersea is a large district in south London, part of the London Borough of Wandsworth, England. It is centred southwest of Charing Cross and extends along the south bank of the River Thames. It includes the Battersea Park. History Batter ...
and
Chelsea Chelsea or Chelsey may refer to: Places Australia * Chelsea, Victoria Canada * Chelsea, Nova Scotia * Chelsea, Quebec United Kingdom * Chelsea, London, an area of London, bounded to the south by the River Thames ** Chelsea (UK Parliament consti ...
. In
central London Central London is the innermost part of London, in England, spanning several boroughs. Over time, a number of definitions have been used to define the scope of Central London for statistics, urban planning and local government. Its characteris ...
, the river passes
Pimlico Pimlico () is an area of Central London in the City of Westminster, built as a southern extension to neighbouring Belgravia. It is known for its garden squares and distinctive Regency architecture. Pimlico is demarcated to the north by London V ...
and
Vauxhall Vauxhall ( ) is a district in South West London, part of the London Borough of Lambeth, England. Vauxhall was part of Surrey until 1889 when the County of London was created. Named after a medieval manor, "Fox Hall", it became well known for ...
, and then forms one of the principal axes of the city, from the
Palace of Westminster The Palace of Westminster serves as the meeting place for both the House of Commons of the United Kingdom, House of Commons and the House of Lords, the two houses of the Parliament of the United Kingdom. Informally known as the Houses of Parli ...
to the
Tower of London The Tower of London, officially His Majesty's Royal Palace and Fortress of the Tower of London, is a historic castle on the north bank of the River Thames in central London. It lies within the London Borough of Tower Hamlets, which is separa ...
. At this point, it historically formed the southern boundary of the medieval city, with
Southwark Southwark ( ) is a district of Central London situated on the south bank of the River Thames, forming the north-western part of the wider modern London Borough of Southwark. The district, which is the oldest part of South London, developed ...
, on the opposite bank, then being part of
Surrey Surrey () is a ceremonial and non-metropolitan county in South East England, bordering Greater London to the south west. Surrey has a large rural area, and several significant urban areas which form part of the Greater London Built-up Area. ...
. Beyond central London, the river passes
Bermondsey Bermondsey () is a district in southeast London, part of the London Borough of Southwark, England, southeast of Charing Cross. To the west of Bermondsey lies Southwark, to the east Rotherhithe and Deptford, to the south Walworth and Peckham, a ...
,
Wapping Wapping () is a district in East London in the London Borough of Tower Hamlets. Wapping's position, on the north bank of the River Thames, has given it a strong maritime character, which it retains through its riverside public houses and steps, ...
,
Shadwell Shadwell is a district of East London, England, in the London Borough of Tower Hamlets , east of Charing Cross. It lies on the north bank of the Thames between Wapping (to the west) and Ratcliff (to the east). This riverside location has mea ...
,
Limehouse Limehouse is a district in the London Borough of Tower Hamlets in East London. It is east of Charing Cross, on the northern bank of the River Thames. Its proximity to the river has given it a strong maritime character, which it retains throug ...
,
Rotherhithe Rotherhithe () is a district of south-east London, England, and part of the London Borough of Southwark. It is on a peninsula on the south bank of the Thames, facing Wapping, Shadwell and Limehouse on the north bank, as well as the Isle of Dogs ...
,
Millwall Millwall is a district on the western and southern side of the Isle of Dogs, in east London, England, in the London Borough of Tower Hamlets. It lies to the immediate south of Canary Wharf and Limehouse, north of Greenwich and Deptford, eas ...
,
Deptford Deptford is an area on the south bank of the River Thames in southeast London, within the London Borough of Lewisham. It is named after a ford of the River Ravensbourne. From the mid 16th century to the late 19th it was home to Deptford Dock ...
,
Greenwich Greenwich ( , ,) is a town in south-east London, England, within the ceremonial county of Greater London. It is situated east-southeast of Charing Cross. Greenwich is notable for its maritime history and for giving its name to the Greenwich ...
,
Cubitt Town Cubitt Town is a district on the eastern side of the Isle of Dogs in London, England. This part of the former Metropolitan Borough of Poplar was redeveloped as part of the Port of London in the 1840s and 1850s by William Cubitt, Lord Mayor of L ...
, Blackwall,
New Charlton Charlton Riverside, previously known as New Charlton, is the area along the south bank of the river Thames at Charlton, London, which forms part of the Royal Borough of Greenwich. It was formerly a primarily industrial zone, known for the glass a ...
and
Silvertown Silvertown is a district in the London Borough of Newham, in east London, England. It lies on the north bank of the River Thames, Thames and was historically part of the parishes of West Ham and East Ham, Becontree Hundred, hundred of Becontr ...
, before flowing through the
Thames Barrier The Thames Barrier is a retractable Flood barrier, barrier system built to protect the floodplain of most of Greater London from exceptionally high tides and storm surges moving up from the North Sea. It has been operational since 1982. When n ...
, which protects central London from flooding by
storm surge A storm surge, storm flood, tidal surge, or storm tide is a coastal flood or tsunami-like phenomenon of rising water commonly associated with low-pressure weather systems, such as cyclones. It is measured as the rise in water level above the n ...
s. Below the barrier, the river passes
Woolwich Woolwich () is a district in southeast London, England, within the Royal Borough of Greenwich. The district's location on the River Thames led to its status as an important naval, military and industrial area; a role that was maintained throu ...
,
Thamesmead Thamesmead is an area of south-east London, England, straddling the border between the Royal Borough of Greenwich and the London Borough of Bexley. It is located east of Charing Cross, north-east of Woolwich and west of Erith. It mainly consi ...
,
Dagenham Dagenham () is a town in East London, England, within the London Borough of Barking and Dagenham. Dagenham is centred east of Charing Cross. It was historically a rural parish in the Becontree Hundred of Essex, stretching from Hainault Forest ...
,
Erith Erith () is an area in south-east London, England, east of Charing Cross. Before the creation of Greater London in 1965, it was in the historical county of Kent. Since 1965 it has formed part of the London Borough of Bexley. It lies nort ...
,
Purfleet Purfleet-on-Thames is a town in the Thurrock unitary authority, Essex, England. It is bordered by the A13 road to the north and the River Thames to the south and is within the easternmost part of the M25 motorway but just outside the Greater Lon ...
,
Dartford Dartford is the principal town in the Borough of Dartford, Kent, England. It is located south-east of Central London and is situated adjacent to the London Borough of Bexley to its west. To its north, across the Thames estuary, is Thurrock in ...
,
West Thurrock West Thurrock is an area, former civil parish and traditional Church of England parish in Thurrock, Essex, England, located 17.5 miles (28.1 km) east south-east of Charing Cross, London. In 1931 the parish had a population of 5,153. On 1 Apr ...
, Northfleet,
Tilbury Tilbury is a port town in the borough of Thurrock, Essex, England. The present town was established as separate settlement in the late 19th century, on land that was mainly part of Chadwell St Mary. It contains a 16th century fort and an ancie ...
and
Gravesend Gravesend is a town in northwest Kent, England, situated 21 miles (35 km) east-southeast of Charing Cross (central London) on the Bank (geography), south bank of the River Thames and opposite Tilbury in Essex. Located in the diocese of Ro ...
before entering the
Thames Estuary The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain. Limits An estuary can be defined according to different criteria (e.g. tidal, geographical, navigational or in terms of salini ...
near
Southend-on-Sea Southend-on-Sea (), commonly referred to as Southend (), is a coastal city and unitary authority area with borough status in southeastern Essex, England. It lies on the north side of the Thames Estuary, east of central London. It is bordered ...
.


Sea level

Sediment cores up to 10 m deep collected by the
British Geological Survey The British Geological Survey (BGS) is a partly publicly funded body which aims to advance geoscientific knowledge of the United Kingdom landmass and its continental shelf by means of systematic surveying, monitoring and research. The BGS h ...
from the banks of the tidal River Thames contain geochemical information and fossils which provide a 10,000-year record of sea-level change. Combined, this and other studies suggest that the Thames sea-level has risen more than 30 m during the Holocene at a rate of around 5–6 mm per year from 10,000 to 6,000 years ago. The rise of sea level dramatically reduced when the ice melt nearly concluded over the past 4,000 years. Since the beginning of the 20th century, rates of sea level rise range from 1.22 mm per year to 2.14 mm per year.


Catchment area and discharge

The Thames River Basin District, including the Medway catchment, covers an area of . The river basin is a mixture of urban through to rural in the east and northern parts while the western parts of the catchment are predominantly rural with many towns to a suburban layout such as, archetypically
Swindon Swindon () is a town and unitary authority with Borough status in the United Kingdom, borough status in Wiltshire, England. As of the 2021 Census, the population of Swindon was 201,669, making it the largest town in the county. The Swindon un ...
. The area is among the driest in the United Kingdom. Water resources consist of
groundwater Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. About 30 percent of all readily available freshwater in the world is groundwater. A unit of rock or an unconsolidate ...
from aquifers and water taken from the Thames and its tributaries, much of it stored in large bank-side reservoirs. The Thames itself provides two-thirds of London's drinking water while groundwater supplies about 40 percent of public water supplies in the total catchment area. Groundwater is an important water source, especially in the drier months, so maintaining its quality and quantity is extremely important. Groundwater is vulnerable to surface pollution, especially in highly urbanised areas.


The non-tidal section

Brooks, canals and rivers, within an area of , combine to form 38 main tributaries feeding the Thames between its source and
Teddington Lock Teddington Lock is a complex of three lock (water transport), locks and a weir on the River Thames between Ham, London, Ham and Teddington in the London Borough of Richmond upon Thames, England. Historically in Middlesex, it was first buil ...
. This is the usual
tidal limit Head of tide, tidal limit or tidehead is the farthest point upstream where a river is affected by tidal fluctuations, or where the fluctuations are less than a certain amount. This applies to rivers which flow into tidal bodies such as oceans, b ...
; however, high spring tides can raise the head water level in the reach above Teddington and can occasionally reverse the river flow for a short time. In these circumstances, tidal effects can be observed upstream to the next lock beside Molesey weir, which is visible from the towpath and
bridge A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually somethi ...
beside
Hampton Court Palace Hampton Court Palace is a Grade I listed royal palace in the London Borough of Richmond upon Thames, southwest and upstream of central London on the River Thames. The building of the palace began in 1514 for Cardinal Thomas Wolsey, the chie ...
. Before Teddington Lock was built in 1810–12, the river was tidal at peak spring tides as far as Staines upon Thames. In descending order, non-related tributaries of the non-tidal Thames, with river status, are the
Churn Churn may refer to: * Churn drill, large-diameter drilling machine large holes appropriate for holes in the ground Dairy-product terms * Butter churn, device for churning butter * Churning (butter), the process of creating butter out of mil ...
,
Leach Leach may refer to: * Leach (surname) * Leach, Oklahoma, an unincorporated community, United States * Leach, Tennessee, an unincorporated community, United States * Leach Highway, Western Australia * Leach orchid * Leach phenotype, a mutation in ...
,
Cole Cole may refer to: Plants * Cole crops of the genus ''Brassica'', especially cabbage, kale, or rape (rapeseed). People * Cole (given name), people with the given name Cole * Cole (surname), people with the surname Cole Companies *Cole Motor ...
, Ray, Coln, Windrush,
Evenlode Evenlode is a village and civil parish ( ONS Code 23UC051) in the Cotswold District of eastern Gloucestershire in England. Evenlode is bordered by the Gloucestershire parishes of Moreton-in-Marsh to the northwest, Longborough and Donnington to ...
, Cherwell,
Ock Ock or OCK may refer to: * River Ock (disambiguation), three rivers in England * Ok (Korean name), also spelt Ock **Ock Joo-hyun (born 1980), South Korean K-pop singer and musical theatre actress * Océano Club de Kerkennah, a Tunisian football cl ...
,
Thame Thame is a market town and civil parish in Oxfordshire, about east of the city of Oxford and southwest of Aylesbury. It derives its name from the River Thame which flows along the north side of the town and forms part of the county border wi ...
, Pang,
Kennet Kennet may refer to: Places in the United Kingdom *Kennet, Clackmannanshire, Scotland People *Baron Kennet, a title in the Peerage of the United Kingdom * D. Mark Kennet (born 1957), American economist *Josh Kennet (born 1987), English-Israel ...
,
Loddon Loddon may refer to: *Loddon, Norfolk in England, UK *Shire of Loddon in Victoria, Australia (since 1995) **Bridgewater On Loddon, Victoria in Australia *River Loddon, flows into the River Thames near Reading *Loddon River, flows north from south of ...
,
Colne Colne () is a market town and civil parish in the Borough of Pendle in Lancashire, England. Located northeast of Nelson, north-east of Burnley, east of Preston and west of Leeds. The town should not be confused with the unrelated Colne Val ...
, Wey and
Mole Mole (or Molé) may refer to: Animals * Mole (animal) or "true mole", mammals in the family Talpidae, found in Eurasia and North America * Golden moles, southern African mammals in the family Chrysochloridae, similar to but unrelated to Talpida ...
. In addition, there are occasional backwaters and artificial cuts that form islands,
distributaries A distributary, or a distributary channel, is a stream that branches off and flows away from a main stream channel. Distributaries are a common feature of river deltas. The phenomenon is known as river bifurcation. The opposite of a distributar ...
(most numerous in the case of the
Colne Colne () is a market town and civil parish in the Borough of Pendle in Lancashire, England. Located northeast of Nelson, north-east of Burnley, east of Preston and west of Leeds. The town should not be confused with the unrelated Colne Val ...
), and man-made distributaries such as the Longford River. Three canals intersect this stretch: the
Oxford Canal The Oxford Canal is a narrowboat canal in central England linking the City of Oxford with the Coventry Canal at Hawkesbury (just north of Coventry and south of Bedworth) via Banbury and Rugby. Completed in 1790, it connects to the River Thame ...
,
Kennet and Avon Canal The Kennet and Avon Canal is a waterway in southern England with an overall length of , made up of two lengths of navigable river linked by a canal. The name is used to refer to the entire length of the navigation rather than solely to the cent ...
and
Wey Navigation The River Wey Navigation and Godalming Navigation together provide a continuous navigable route from the River Thames near Weybridge via Guildford to Godalming (commonly called the Wey Navigation). Both waterways are in Surrey and are owned ...
. Its longest artificial secondary channel (cut), the
Jubilee River The Jubilee River is a hydraulic channel in southern England. It is long and is on average wide. It was constructed in the late 1990s and early 2000s to take overflow from the River Thames and so alleviate flooding to areas in and around the ...
, was built between Maidenhead and Windsor for flood relief and completed in 2002. The non-tidal section of the river is managed by the
Environment Agency The Environment Agency (EA) is a non-departmental public body, established in 1996 and sponsored by the United Kingdom government's Department for Environment, Food and Rural Affairs, with responsibilities relating to the protection and enha ...
, which is responsible for managing the flow of water to help prevent and mitigate flooding, and providing for navigation: the volume and speed of water downstream is managed by adjusting the sluices at each of the weirs and, at peak high water, levels are generally dissipated over preferred flood plains adjacent to the river. Occasionally, flooding of inhabited areas is unavoidable and the agency issues flood warnings. Due to stiff penalties applicable on the non-tidal river, which is a drinking water source before treatment,
sanitary sewer overflow Sanitary sewer overflow (SSO) is a condition in which untreated sewage is discharged from a sanitary sewer into the environment prior to reaching sewage treatment facilities. When caused by rainfall it is also known as wet weather overflow. Cause ...
from the many
sewage treatment plant Sewage treatment (or domestic wastewater treatment, municipal wastewater treatment) is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable for discharge to the surrounding en ...
s covering the upper Thames basin should be rare in the non-tidal Thames. However, storm sewage overflows are still common in almost all the main tributaries of the Thames despite claims by Thames Water to the contrary.


The tidal section

Below Teddington Lock (about upstream of the Thames Estuary), the river is subject to tidal activity from the
North Sea The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian S ...
. Before the lock was installed, the river was tidal as far as Staines, about upstream. London, capital of
Roman Britain Roman Britain was the period in classical antiquity when large parts of the island of Great Britain were under occupation by the Roman Empire. The occupation lasted from AD 43 to AD 410. During that time, the territory conquered was ...
, was established on two hills, now known as Cornhill and
Ludgate Hill Ludgate Hill is a street and surrounding area, on a small hill in the City of London. The street passes through the former site of Ludgate, a city gate that was demolished – along with a gaol attached to it – in 1760. The area include ...
. These provided a firm base for a trading centre at the lowest possible point on the Thames. A river crossing was built at the site of
London Bridge Several bridges named London Bridge have spanned the River Thames between the City of London and Southwark, in central London. The current crossing, which opened to traffic in 1973, is a box girder bridge built from concrete and steel. It r ...
. London Bridge is now used as the basis for published tide tables giving the times of
high tide Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the Earth and Moon orbiting one another. Tide tables c ...
. High tide reaches Putney about 30 minutes later than London Bridge, and Teddington about an hour later. The tidal stretch of the river is known as "the
Tideway The Tideway is a part of the River Thames in England which is subject to tides. This stretch of water is downstream from Teddington Lock. The Tideway comprises the upper Thames Estuary including the Pool of London. Tidal activity Depending on ...
". Tide tables are published by the Port of London Authority and are available online. Times of high and low tides are also posted on Twitter. The principal
tributaries of the River Thames This article lists the tributaries of the River Thames from the sea to the source, in England. There are also secondary lists of backwaters of the river itself and the waterways branching off. Note: the River Medway shares the saline lower Tha ...
on the Tideway include the rivers Crane, Brent, Wandle, Ravensbourne (the final part of which is called Deptford Creek),
Lea Lea or LEA may refer to: Places Australia * Lea River, Tasmania, Australia * Lake Lea, Tasmania, from which the Lea River flows * RAAF Base Learmonth, IATA airport code "LEA" England * Lea, Cheshire, a civil parish * Lea, Derbyshire, a set ...
(the final part of which is called Bow Creek), Roding, Darent and Ingrebourne. At London, the water is slightly
brackish Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...
with sea salt, being a mix of sea and fresh water. This part of the river is managed by the Port of London Authority. The flood threat here comes from high tides and strong winds from the North Sea, and the Thames Barrier was built in the 1980s to protect London from this risk.
The Nore The Nore is a long bank of sand and silt running along the south-centre of the final narrowing of the Thames Estuary, England. Its south-west is the very narrow Nore Sand. Just short of the Nore's easternmost point where it fades into the cha ...
is the sandbank that marks the mouth of the
Thames Estuary The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain. Limits An estuary can be defined according to different criteria (e.g. tidal, geographical, navigational or in terms of salini ...
, where the outflow from the Thames meets the
North Sea The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian S ...
. It is roughly halfway between Havengore Creek in Essex and Warden Point on the
Isle of Sheppey The Isle of Sheppey is an island off the northern coast of Kent, England, neighbouring the Thames Estuary, centred from central London. It has an area of . The island forms part of the local government district of Swale. ''Sheppey'' is derived ...
in Kent. Until 1964 it marked the seaward limit of the Port of London Authority. As the sandbank was a major hazard for shipping coming in and out of London, in 1732 it received the world's first lightship. This became a major landmark, and was used as an assembly point for shipping. Today it is marked by Sea Reach No. 1 Buoy.


Islands

The River Thames contains over 80 islands ranging from the large estuarial marshlands of the
Isle of Sheppey The Isle of Sheppey is an island off the northern coast of Kent, England, neighbouring the Thames Estuary, centred from central London. It has an area of . The island forms part of the local government district of Swale. ''Sheppey'' is derived ...
and
Canvey Island Canvey Island is a town, civil parishes in England, civil parish and reclaimed island in the Thames estuary, near Southend-on-Sea, in the Castle Point district, in the county of Essex, England. It has an area of and a population of 38,170.Office ...
to small tree-covered islets like
Rose Isle Rose Isle is an island in the River Thames in England just downstream of Kennington Railway Bridge on the reach above Sandford Lock, near Kennington, Oxfordshire. The island is tree-covered and has a narrow channel behind it crossed by a foot ...
in Oxfordshire and
Headpile Eyot Headpile Eyot is long and narrow eyot in the River Thames, situated just above Bray Lock. It is also near the village of Bray, Berkshire. The island is small and covered with trees such as Horse chestnut and English oaks. Bronze Age ...
in Berkshire. They are found all the way from the
Isle of Sheppey The Isle of Sheppey is an island off the northern coast of Kent, England, neighbouring the Thames Estuary, centred from central London. It has an area of . The island forms part of the local government district of Swale. ''Sheppey'' is derived ...
in Kent to
Fiddler's Island Fiddler's Island is an island in the River Thames at Oxford in England. It is situated south of Port Meadow on the reach above Osney Lock. The north part of the island sits between the River Thames and the top end of Castle Mill Stream, a Thame ...
in Oxfordshire. Some of the largest inland islands, for example
Formosa Island Formosa Island is an island in the River Thames in England at Cookham Lock near Cookham, Berkshire, with two smaller adjacent islands. The island is one of the largest on the non-tidal river Thames with of woodland. It can be reached by foot ...
near Cookham and
Andersey Island Andersey Island is a area of flood-meadow and former flood-meadow south-east of Abingdon Bridge, Abingdon, Oxfordshire on the reach above Culham Lock in Culham, which parish it lies however maintaining close links with Abingdon by virtue of its ...
at Abingdon, were created naturally when the course of the river divided into separate streams. In the Oxford area the river splits into several streams across the
floodplain A floodplain or flood plain or bottomlands is an area of land adjacent to a river which stretches from the banks of its channel to the base of the enclosing valley walls, and which experiences flooding during periods of high discharge.Goudi ...
(
Seacourt Stream Hinksey Stream is a branch of the River Thames to the west of the city of Oxford, England. It starts as Seacourt Stream (also known as Wytham Stream), which leaves the Thames at a bifurcation north of the village of Wytham, and rejoins the riv ...
,
Castle Mill Stream Castle Mill Stream is a backwater of the River Thames in the west of Oxford, England. It is 5.5 km long. Course The stream leaves the main course of the River Thames at the south end of Port Meadow, immediately upstream of Medley Foo ...
,
Bulstake Stream Bulstake Stream, also spelt Bullstake Stream, is a backwater of the River Thames at Oxford, England. The stream leaves the main stream of the Thames at a river junction known as Four Rivers, at the south west corner of Fiddler's Island oppos ...
and others), creating several islands (
Fiddler's Island Fiddler's Island is an island in the River Thames at Oxford in England. It is situated south of Port Meadow on the reach above Osney Lock. The north part of the island sits between the River Thames and the top end of Castle Mill Stream, a Thame ...
,
Osney Osney or Osney Island (; an earlier spelling of the name is ''Oseney'') is a riverside community in the west of the city of Oxford, England. In modern times the name is applied to a community also known as Osney Town astride Botley Road, just we ...
and others).
Desborough Island Desborough Island is a manmade island in the River Thames on the reach above Sunbury Lock in Surrey, England. It was formed in the 1930s by the digging of a channel – the Desborough Cut – by the Thames Conservancy as a meander cutoff of ...
,
Ham Island Ham Island is an inhabited man-made island of roughly 50 hectares (125 acres) in the River Thames in Old Windsor in England. It was a mature meander of the Thames until a channel was dug, the New Cut, to build Old Windsor Lock which reduced th ...
at Old Windsor and
Penton Hook Island Penton Hook Island is a mainly wooded former peninsula created into a series of three weir-divided islands in the River Thames in England, so created in river modifications since 1815 with a navigable lock and weir stream channel to form meander ...
were artificially created by lock cuts and navigation channels.
Chiswick Eyot Chiswick Eyot is a narrow, uninhabited ait (river island) of the Thames. It is a tree- and reed-covered rise on the Tideway by Chiswick, in London, England and is overlooked by Chiswick Mall and by some of the Barnes riverside on the far b ...
is a landmark on the Boat Race course, while
Glover's Island Glover's Island (originally called Petersham Ait) is in a tree-lined section of river, formerly known as Horse Reach on the tidal Thames, between Richmond Lock and Teddington Lock in the Borough of Richmond upon Thames, London, England. Desc ...
forms the centre of a view from Richmond Hill. Islands of historical interest include
Magna Carta Island Magna Carta Island is an ait in the River Thames in England, on the reach above Bell Weir Lock. It is in Berkshire facing water-meadows forming Runnymede. Its civil and ecclesiastical parish is Wraysbury so it was transferred from Buckingha ...
at
Runnymede Runnymede is a water-meadow alongside the River Thames in the English county of Surrey, and just over west of central London. It is notable for its association with the sealing of Magna Carta, and as a consequence is, with its adjoining hi ...
,
Fry's Island Fry's Island, also known as De Montfort Island, is an island in the River Thames in England. The island is on the reach above Caversham Lock at Reading, Berkshire. The centre of Reading is to the south and the suburb of Caversham to the imme ...
at Reading, and
Pharaoh's Island Pharaoh's Island ( ar, جزيرة فرعون ''Jazīrat Fir‘aun''), whose current popular name is Coral Island, is a small island in the northern Gulf of Aqaba some east off the shore of Egypt's eastern Sinai Peninsula. Some scholars identif ...
near Shepperton. In more recent times
Platts Eyot Platt's Eyot or Platt's Ait is an island on the River Thames at Hampton, in the London Borough of Richmond upon Thames, England, on the reach between Molesey Lock and Sunbury Lock. Geography The island was a typical ait used for growing osie ...
at
Hampton Hampton may refer to: Places Australia *Hampton bioregion, an IBRA biogeographic region in Western Australia *Hampton, New South Wales *Hampton, Queensland, a town in the Toowoomba Region * Hampton, Victoria Canada * Hampton, New Brunswick *Ha ...
was the place where Motor Torpedo Boats (MTB)s were built,
Tagg's Island Tagg's Island, in the London Borough of Richmond upon Thames, is an island on the River Thames on the reach above Molesey Lock and just above Ash Island. Geography The centre of the island has a lake with river access and private moorings surr ...
near Molesey was associated with the impresario
Fred Karno Frederick John Westcott (26 March 1866 – 17 September 1941), best known by his stage name Fred Karno, was an English theatre impresario of the British music hall. As a comedian of slapstick he is credited with popularising the custard-p ...
and
Eel Pie Island Eel Pie Island is an island in the River Thames at Twickenham in the London Borough of Richmond upon Thames. It is on the maintained minimum head of water above the only lock on the Tideway and is accessible by boat or from the left (generall ...
at Twickenham was the birthplace of the South East's R&B music scene.
Westminster Abbey Westminster Abbey, formally titled the Collegiate Church of Saint Peter at Westminster, is an historic, mainly Gothic church in the City of Westminster, London, England, just to the west of the Palace of Westminster. It is one of the United ...
and the
Palace of Westminster The Palace of Westminster serves as the meeting place for both the House of Commons of the United Kingdom, House of Commons and the House of Lords, the two houses of the Parliament of the United Kingdom. Informally known as the Houses of Parli ...
(commonly known today as the
Houses of Parliament The Palace of Westminster serves as the meeting place for both the House of Commons and the House of Lords, the two houses of the Parliament of the United Kingdom. Informally known as the Houses of Parliament, the Palace lies on the north bank ...
) were built on Thorney Island, which used to be an
eyot An ait (, like ''eight'') or eyot () is a small island. It is especially used to refer to river islands found on the River Thames and its tributaries in England. Aits are typically formed by the deposit of sediment in the water, which accumu ...
.


Geological and topographic history

Researchers have identified the River Thames as a discrete drainage line flowing as early as 58 million years ago, in the
Thanetian The Thanetian is, in the ICS Geologic timescale, the latest age or uppermost stratigraphic stage of the Paleocene Epoch or Series. It spans the time between . The Thanetian is preceded by the Selandian Age and followed by the Ypresian Age ( ...
stage of the late
Palaeocene The Paleocene, ( ) or Palaeocene, is a geological epoch that lasted from about 66 to 56 million years ago (mya). It is the first epoch of the Paleogene Period in the modern Cenozoic Era. The name is a combination of the Ancient Greek ''palai ...
epoch. Until around 500,000 years ago, the Thames flowed on its existing course through what is now
Oxfordshire Oxfordshire is a ceremonial and non-metropolitan county in the north west of South East England. It is a mainly rural county, with its largest settlement being the city of Oxford. The county is a centre of research and development, primarily ...
, before turning to the north-east through
Hertfordshire Hertfordshire ( or ; often abbreviated Herts) is one of the home counties in southern England. It borders Bedfordshire and Cambridgeshire to the north, Essex to the east, Greater London to the south, and Buckinghamshire to the west. For govern ...
and
East Anglia East Anglia is an area in the East of England, often defined as including the counties of Norfolk, Suffolk and Cambridgeshire. The name derives from the Anglo-Saxon kingdom of the East Angles, a people whose name originated in Anglia, in ...
and reaching the
North Sea The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian S ...
near present-day
Ipswich Ipswich () is a port town and borough in Suffolk, England, of which it is the county town. The town is located in East Anglia about away from the mouth of the River Orwell and the North Sea. Ipswich is both on the Great Eastern Main Line r ...
. At this time the river-system headwaters lay in the English
West Midlands West or Occident is one of the four cardinal directions or points of the compass. It is the opposite direction from east and is the direction in which the Sun sets on the Earth. Etymology The word "west" is a Germanic word passed into some ...
and may, at times, have received drainage from the
Berwyn Mountains The Berwyn range (Welsh: ''Y Berwyn'' or ''Mynydd y Berwyn'') is an isolated and sparsely populated area of moorland in the northeast of Wales, roughly bounded by Llangollen in the northeast, Corwen in the northwest, Bala in the southwest, and ...
in
North Wales , area_land_km2 = 6,172 , postal_code_type = Postcode , postal_code = LL, CH, SY , image_map1 = Wales North Wales locator map.svg , map_caption1 = Six principal areas of Wales common ...
.


Ice age

About 450,000 years ago, in the most extreme
Ice Age An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and gree ...
of the
Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
, the Anglian, the furthest southern extent of the ice sheet reached
Hornchurch Hornchurch is a suburban town in East London, England, and part of the London Borough of Havering. It is located east-northeast of Charing Cross. It comprises a number of shopping streets and a large residential area. It historically formed ...
in east London, the Vale of St Albans, and the
Finchley Gap The Finchley Gap (or "Finchley depression") is a location centred on Church End, Finchley, in north London, England. As a topographical feature approximately eight kilometres wide, lying between higher ground to the north-west (Mill Hill) and t ...
. It dammed the river in
Hertfordshire Hertfordshire ( or ; often abbreviated Herts) is one of the home counties in southern England. It borders Bedfordshire and Cambridgeshire to the north, Essex to the east, Greater London to the south, and Buckinghamshire to the west. For govern ...
, resulting in the formation of large ice lakes, which eventually burst their banks and caused the river to divert onto its present course through the area of present-day London. The ice lobe which stopped at present-day
Finchley Finchley () is a large district of north London, England, in the London Borough of Barnet. Finchley is on high ground, north of Charing Cross. Nearby districts include: Golders Green, Muswell Hill, Friern Barnet, Whetstone, Mill Hill and H ...
deposited about 14 metres of
boulder clay Boulder clay is an unsorted agglomeration of clastic sediment that is unstratified and structureless and contains gravel of various sizes, shapes, and compositions distributed at random in a fine-grained matrix. The fine-grained matrix consists o ...
there. Its torrent of
meltwater Meltwater is water released by the melting of snow or ice, including glacial ice, tabular icebergs and ice shelves over oceans. Meltwater is often found in the ablation zone of glaciers, where the rate of snow cover is reducing. Meltwater can be ...
gushed through the
Finchley Gap The Finchley Gap (or "Finchley depression") is a location centred on Church End, Finchley, in north London, England. As a topographical feature approximately eight kilometres wide, lying between higher ground to the north-west (Mill Hill) and t ...
and south towards the new course of the Thames, and proceeded to carve out the Brent Valley in the process. The Anglian ice advance resulted in a new course for the Thames through
Berkshire Berkshire ( ; in the 17th century sometimes spelt phonetically as Barkeshire; abbreviated Berks.) is a historic county in South East England. One of the home counties, Berkshire was recognised by Queen Elizabeth II as the Royal County of Berk ...
and on into London, after which the river rejoined its original course in southern
Essex Essex () is a county in the East of England. One of the home counties, it borders Suffolk and Cambridgeshire to the north, the North Sea to the east, Hertfordshire to the west, Kent across the estuary of the River Thames to the south, and G ...
, near the present River Blackwater estuary. Here it entered a substantial freshwater lake in the southern North Sea basin, south of what is called
Doggerland Doggerland was an area of land, now submerged beneath the North Sea, that connected Britain to continental Europe. It was flooded by rising sea levels around 6500–6200 BCE. The flooded land is known as the Dogger Littoral. Geological sur ...
. The overspill of this lake caused the formation of the
Channel River The Channel River was a prehistoric river flowing between England and France during periods of low sea level during the ice ages. Its tributaries included the river Rhine in modern-day Netherlands, the River Thames in modern-day England and other r ...
and later the
Dover Strait The Strait of Dover or Dover Strait (french: Pas de Calais - ''Strait of Calais''), is the strait at the narrowest part of the English Channel, marking the boundary between the Channel and the North Sea, separating Great Britain from continen ...
gap between present-day
Britain Britain most often refers to: * The United Kingdom, a sovereign state in Europe comprising the island of Great Britain, the north-eastern part of the island of Ireland and many smaller islands * Great Britain, the largest island in the United King ...
and France. Subsequent development led to the continuation of the course that the river follows at the present day. Most of the
bedrock In geology, bedrock is solid Rock (geology), rock that lies under loose material (regolith) within the crust (geology), crust of Earth or another terrestrial planet. Definition Bedrock is the solid rock that underlies looser surface mater ...
of the
Vale of Aylesbury The Aylesbury Vale (or Vale of Aylesbury) is a geographical region in Buckinghamshire, England, which is bounded by the Borough of Milton Keynes and South Northamptonshire to the north, Central Bedfordshire and the Borough of Dacorum (Hertfordsh ...
comprises
clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4). Clays develop plasticity when wet, due to a molecular film of water surrounding the clay par ...
and
chalk Chalk is a soft, white, porous, sedimentary carbonate rock. It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton that had settled to the sea floor. Chalk ...
that formed at the end of the
ice age An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and gree ...
and at one time was under the Proto-Thames. At this time the vast underground reserves of water formed that make the
water table The water table is the upper surface of the zone of saturation. The zone of saturation is where the pores and fractures of the ground are saturated with water. It can also be simply explained as the depth below which the ground is saturated. T ...
higher than average in the Vale of Aylesbury. At the height of the last ice age, around 20,000 BC, Britain was connected to mainland Europe by a large expanse of land known as
Doggerland Doggerland was an area of land, now submerged beneath the North Sea, that connected Britain to continental Europe. It was flooded by rising sea levels around 6500–6200 BCE. The flooded land is known as the Dogger Littoral. Geological sur ...
in the southern North Sea Basin. At this time, the Thames' course did not continue to Doggerland but flowed southwards from the eastern Essex coast where it met the waters of the proto-Rhine–Meuse–Scheldt delta flowing from what are now the Netherlands and Belgium. These rivers formed a single river – the
Channel River The Channel River was a prehistoric river flowing between England and France during periods of low sea level during the ice ages. Its tributaries included the river Rhine in modern-day Netherlands, the River Thames in modern-day England and other r ...
(''Fleuve Manche'') – that passed through the Dover Strait and drained into the Atlantic Ocean in the western English Channel. Upon the valley sides of the Thames and some of its tributaries can be seen other terraces of brickearth, laid over and sometimes interlayered with the clays. These deposits were brought in by the winds during the periglacial periods, suggesting that wide, flat marshes were then part of the landscape, which the new rivers proceeded to cut into. The steepness of some valley sides indicates very much lower mean sea levels caused by the glaciation locking up so much water upon the land masses, thus causing the river water to flow rapidly seaward and so erode its bed quickly downwards. The original land surface was around above the current sea-level. The surface had sandy deposits from an ancient sea, laid over sedimentary clay (this is the blue London Clay). All the erosion down from this higher land surface, and the sorting action by these changes of water flow and direction, formed what is known as the Thames Fluvial terrace, River Gravel Terraces. Since Roman times and perhaps earlier, the isostasy, isostatic rebound from the weight of previous ice sheets, and its interplay with the eustatic change in sea level, have resulted in the old valley of the River Brent, together with that of the Thames, silting up again. Thus, along much of the Brent's present-day course, one can make out the water-meadows of rich alluvium, which is augmented by frequent floods.


Conversion of marshland

After the river took its present-day course, many of the banks of the
Thames Estuary The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain. Limits An estuary can be defined according to different criteria (e.g. tidal, geographical, navigational or in terms of salini ...
and the
Thames Valley The Thames Valley is an informally-defined sub-region of South East England, centred on the River Thames west of London, with Oxford as a major centre. Its boundaries vary with context. The area is a major tourist destination and economic hub, ...
in London were partly covered in marshland, as was the adjoining Lower Lea Valley. Streams and rivers like the River Lea, Tyburn Brook and Bollo Brook drained into the river, while some islands, e.g. Thorney Island (London), Thorney Island, formed over the ages. The northern tip of the ancient parish of Lambeth (parish), Lambeth, for example, was marshland known as ''Lambeth Marshe'', but it was drained in the 18th century; the street name Lower Marsh preserves a memory. The East End of London, also known simply as the East End, was the area of London east of the medieval walled City of London and north of the River Thames, although it is not defined by universally accepted formal boundaries; the River Lea can be considered another boundary. Most of the local riverside was also marshland. The land was drained and became farmland; it was built on after the Industrial Revolution.
Canvey Island Canvey Island is a town, civil parishes in England, civil parish and reclaimed island in the Thames estuary, near Southend-on-Sea, in the Castle Point district, in the county of Essex, England. It has an area of and a population of 38,170.Office ...
in southern Essex (area ; population 40,000) was once marshy, but is now a fully reclaimed island in the Thames estuary, separated from the mainland of south
Essex Essex () is a county in the East of England. One of the home counties, it borders Suffolk and Cambridgeshire to the north, the North Sea to the east, Hertfordshire to the west, Kent across the estuary of the River Thames to the south, and G ...
by a network of creeks. Lying below sea level, it is prone to flooding at exceptional tides, but has nevertheless been inhabited since Roman times.


Wildlife

Various species of birds feed off the river or nest on it, some being found both at sea and inland. These include great cormorant, cormorant, black-headed gull and European herring gull, herring gull. The mute swan is a familiar sight on the river but the escaped black swan is more rare. The annual ceremony of Swan Upping is an old tradition of counting stocks. Non-native geese that can be seen include Canada goose, Canada geese, Egyptian goose, Egyptian geese and bar-headed goose, bar-headed geese, and ducks include the familiar native mallard, plus introduced Mandarin duck and wood duck. Other water birds to be found on the Thames include the great crested grebe, Eurasian coot, coot, moorhen, grey heron, heron and European kingfisher, kingfisher. Many types of British birds also live alongside the river, although they are not specific to the river habitat. The Thames contains both sea water and fresh water, thus providing support for seawater and freshwater fish. However, many populations of fish are at risk and are being killed in tens of thousands because of pollutants leaking into the river from human activities. Atlantic Salmon, Salmon, which inhabit both environments, have been reintroduced and a succession of fish ladders have been built into
weir A weir or low head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level. Weirs are also used to control the flow of water for outlets of l ...
s to enable them to travel upstream. On 5 August 1993, the largest non-tidal salmon in recorded history was caught close to Boulters Lock in
Maidenhead Maidenhead is a market town in the Royal Borough of Windsor and Maidenhead in the county of Berkshire, England, on the southwestern bank of the River Thames. It had an estimated population of 70,374 and forms part of the border with southern Bu ...
. The specimen weighed and measured in length. The European eel, eel is particularly associated with the Thames and there were formerly many eel traps. Freshwater fish of the Thames and its tributaries include brown trout, European chub, chub, common dace, dace, common roach, roach, barbel (fish species), barbel, European perch, perch, northern pike, pike, common bleak, bleak and flounder. Colonies of short-snouted seahorses as well as School shark, tope and starry smooth-hound, starry smooth-hound sharks have also recently been discovered in the river. The Thames is also host to some invasive crustaceans, including the signal crayfish and the Chinese mitten crab. Aquatic mammals are also known to inhabit the Thames. The population of grey seal, grey and harbour seals numbers up to 700 in the Thames Estuary. These animals have been sighted as far upriver as Richmond. Common bottlenose dolphin, Bottlenose dolphins and harbour porpoises are also sighted in the Thames. On 20 January 2006, a northern bottle-nosed whale was seen in the Thames as far upstream as Chelsea. This was extremely unusual: this whale is generally found in deep sea waters. Crowds gathered along the riverbanks to witness the spectacle but there was soon concern, as the animal came within yards of the banks, almost beaching, and crashed into an empty boat causing slight bleeding. About 12 hours later, the whale is believed to have been seen again near
Greenwich Greenwich ( , ,) is a town in south-east London, England, within the ceremonial county of Greater London. It is situated east-southeast of Charing Cross. Greenwich is notable for its maritime history and for giving its name to the Greenwich ...
, possibly heading back to sea. A rescue attempt lasted several hours, but the whale died on a barge. ''See River Thames whale''.


Human history

The River Thames has played several roles in human history: as an economic resource, a maritime route, a boundary, a fresh water source, a source of food and more recently a leisure facility. In 1929,
John Burns John Elliot Burns (20 October 1858 – 24 January 1943) was an English trade unionist and politician, particularly associated with London politics and Battersea. He was a socialist and then a Liberal Member of Parliament and Minister. He was ...
, one-time MP for Battersea, responded to an American's unfavourable comparison of the Thames with the Mississippi River, Mississippi by coining the expression "The Thames is liquid history". There is evidence of human habitation living off the river along its length dating back to Neolithic times. The British Museum has a decorated bowl (3300–2700 BC), found in the river at Hedsor, Buckinghamshire, and a considerable amount of material was discovered during the excavations of Dorney Lake. A number of Bronze Age sites and artefacts have been discovered along the banks of the river including settlements at
Lechlade Lechlade () is a town at the southern edge of the Cotswolds in Gloucestershire, England, south of Birmingham and west of London. It is the highest point at which the River Thames is navigable, although there is a right of navigation that contin ...
, Cookham and
Sunbury-on-Thames Sunbury-on-Thames (or commonly Sunbury) is a suburban town on the north bank of the River Thames in the Borough of Spelthorne, Surrey, centred southwest of central London. Historically part of the county of Middlesex, in 1965 Sunbury and other ...
.The Physique of Middlesex
, A History of the County of Middlesex: Volume 1: Physique, Archaeology, Domesday, Ecclesiastical Organisation, The Jews, Religious Houses, Education of Working Classes to 1870, Private Education from Sixteenth Century (1969), pp. 1–10. Date Retrieved 11 August 2007.
So extensive have the changes to this landscape been that what little evidence there is of man's presence before the ice came has inevitably shown signs of transportation here by water and reveals nothing specifically local. Likewise, later evidence of occupation, even since the arrival of the Romans, may lie next to the original banks of the Brent but have been buried under centuries of silt.


Roman Britain

Some of the earliest written references to the Thames ( la, #Etymology, Tamesis) occur in Julius Caesar's account of his second expedition to Britain in 54 BC, when the Thames presented a major obstacle and he encountered the Iron Age Belgae, Belgic tribes the Catuvellauni and the Atrebates along the river. The confluence of the Thames and Cherwell was the site of early settlements and the River Cherwell marked the boundary between the Dobunni tribe to the west and the Catuvellauni tribe to the east (these were pre-Roman Celtic tribes). In the late 1980s a large Romano-British settlement was excavated on the edge of the village of
Ashton Keynes Ashton Keynes is a village and civil parish in north Wiltshire, England which borders with Gloucestershire. The village is about south of Cirencester and west of Cricklade. At the 2011 census the population of the parish, which includes the ...
in Wiltshire. Starting in AD 43, under the Claudius, Emperor Claudius, the Roman conquest of Britain, Romans occupied England and, recognising the river's strategic and economic importance, built fortifications along the Thames valley including Durnovaria, a major camp at Dorchester, Oxfordshire, Dorchester. Cornhill and
Ludgate Hill Ludgate Hill is a street and surrounding area, on a small hill in the City of London. The street passes through the former site of Ludgate, a city gate that was demolished – along with a gaol attached to it – in 1760. The area include ...
provided a defensible site near a point on the river both deep enough for the era's ships and narrow enough to be bridged;
Londinium Londinium, also known as Roman London, was the capital of Roman Britain during most of the period of Roman rule. It was originally a settlement established on the current site of the City of London around AD 47–50. It sat at a key cross ...
(London) grew up around the River Walbrook, Walbrook on the north bank around the year 47. Boudica's Iceni razed the settlement in AD 60 or 61 but it was soon rebuilt and, following the completion of its bridge, it grew to become the provincial capital of the island. The next Roman bridges upstream were at Staines-upon-Thames, Staines on the Devil's Highway (Roman Britain), Devil's Highway between Londinium and Calleva Atrebatum, Calleva (Silchester). Boats could be swept up to it on the rising tide with no need for wind or muscle power.


Middle Ages

A Romano-British settlement grew up north of the confluence, partly because the site was naturally protected from attack on the east side by the River Cherwell and on the west by the River Thames. This settlement dominated the pottery trade in what is now central southern England, and pottery was distributed by boats on the Thames and its tributaries. Competition for the use of the river created the centuries-old conflict between those who wanted to dam the river to build millraces and fish traps and those who wanted to travel and carry goods on it. Economic prosperity and the foundation of wealthy monasteries by the Anglo-Saxons attracted unwelcome visitors and by around AD 870 the Vikings were sweeping up the Thames on the tide and creating havoc as in their destruction of Chertsey Abbey. Once William I of England, King William had won total control of the strategically important Thames Valley, he went on to invade the rest of England. He had many castles built, including those at Wallingford Castle, Wallingford, Rochester, Kent, Rochester,
Windsor Windsor may refer to: Places Australia * Windsor, New South Wales ** Municipality of Windsor, a former local government area * Windsor, Queensland, a suburb of Brisbane, Queensland **Shire of Windsor, a former local government authority around Wi ...
and most importantly the
Tower of London The Tower of London, officially His Majesty's Royal Palace and Fortress of the Tower of London, is a historic castle on the north bank of the River Thames in central London. It lies within the London Borough of Tower Hamlets, which is separa ...
. Many details of Thames activity are recorded in the Domesday Book. The following centuries saw the conflict between king and barons coming to a head in AD 1215 when John, King of England, King John was forced to sign the
Magna Carta (Medieval Latin for "Great Charter of Freedoms"), commonly called (also ''Magna Charta''; "Great Charter"), is a royal charter of rights agreed to by King John of England at Runnymede, near Windsor, on 15 June 1215. First drafted by the ...
on an island in the Thames at
Runnymede Runnymede is a water-meadow alongside the River Thames in the English county of Surrey, and just over west of central London. It is notable for its association with the sealing of Magna Carta, and as a consequence is, with its adjoining hi ...
. Among a host of other things, this granted the barons the right of Navigation under Clause 23. Another major consequence of John's reign was the completion of the multi-piered
London Bridge Several bridges named London Bridge have spanned the River Thames between the City of London and Southwark, in central London. The current crossing, which opened to traffic in 1973, is a box girder bridge built from concrete and steel. It r ...
, which acted as a barricade and barrage on the river, affecting the tidal flow upstream and increasing the likelihood of the river freezing over. In Tudor period, Tudor and Stuart period, Stuart times, various kings and queens built magnificent riverside palaces at Hampton Court Palace, Hampton Court,
Kew Kew () is a district in the London Borough of Richmond upon Thames. Its population at the 2011 census was 11,436. Kew is the location of the Royal Botanic Gardens ("Kew Gardens"), now a World Heritage Site, which includes Kew Palace. Kew is a ...
, Richmond on Thames, Whitehall and
Greenwich Greenwich ( , ,) is a town in south-east London, England, within the ceremonial county of Greater London. It is situated east-southeast of Charing Cross. Greenwich is notable for its maritime history and for giving its name to the Greenwich ...
. As early as the 1300s, the Thames was used to dispose of waste matter produced in the city of London, thus turning the river into an open sewer. In 1357, Edward III described the state of the river in a proclamation: "... dung and other filth had accumulated in divers places upon the banks of the river with ... fumes and other abominable stenches arising therefrom."Peter Ackroyd, Thames: The Biography, New York: Doubleday, 2007. "Filthy River" The growth of the population of London greatly increased the amount of waste that entered the river, including human excrement, animal waste from slaughter houses, and waste from manufacturing processes. According to historian Peter Ackroyd, "a public lavatory on London Bridge showered its contents directly onto the river below, and latrines were built over all the tributaries that issued into the Thames."


Early modern period

During a series of cold winters the Thames froze over above London Bridge: in the first Thames frost fairs, Frost Fair in 1607, a tent city was set up on the river, along with a number of amusements, including ice bowling. In good conditions, barges travelled daily from Oxford to London carrying timber, wool, foodstuffs and livestock. The stone from the
Cotswolds The Cotswolds (, ) is a region in central-southwest England, along a range of rolling hills that rise from the meadows of the upper Thames to an escarpment above the Severn Valley and Evesham Vale. The area is defined by the bedrock of Jur ...
used to rebuild St Paul's Cathedral after the Great Fire of London, Great Fire in 1666 was brought all the way down from Radcot. The Thames provided the major route between the City of London and Westminster in the 16th and 17th centuries; the clannish guild of watermen ferried Londoners from landing to landing and tolerated no outside interference. In 1715, Thomas Doggett was so grateful to a local waterman for his efforts in ferrying him home, pulling against the tide, that he set up a rowing race for professional watermen known as "Doggett's Coat and Badge". By the 18th century, the Thames was one of the world's busiest waterways, as London became the centre of the vast, mercantile British Empire, and progressively over the next century the docks expanded in the Isle of Dogs and beyond. Efforts were made to resolve the navigation conflicts upstream by building locks along the Thames. After temperatures began to rise again, starting in 1814, the river stopped freezing over. The building of a new
London Bridge Several bridges named London Bridge have spanned the River Thames between the City of London and Southwark, in central London. The current crossing, which opened to traffic in 1973, is a box girder bridge built from concrete and steel. It r ...
in 1825, with fewer pier (architecture), piers (pillars) than the old, allowed the river to flow more freely and prevented it from freezing over in cold winters. Throughout early modern history the population of London and its industries discarded their rubbish in the river. This included the waste from slaughterhouses, fish markets, and tanneries. The buildup in household cesspools could sometimes overflow, especially when it rained, and was washed into London's streets and sewers which eventually led to the Thames. In the late 18th and 19th centuries people known as mudlarks scavenged in the river mud for a meagre living.


Victorian era

In the 19th century the quality of water in Thames deteriorated further. The discharge of raw sewage into the Thames was formerly only common in the City of London, making its tideway a harbour for many harmful bacteria. Gasworks were built alongside the river, and their by-products leaked into the water, including spent lime, ammonia, cyanide, and carbolic acid. The river had an unnaturally warm temperature caused by chemical reactions in the water, which also removed the water's oxygen. Four serious cholera outbreaks killed tens of thousands of people between 1832 and 1865. Historians have attributed Albert, Prince Consort, Prince Albert's death in 1861 to typhoid that had spread in the river's dirty waters beside Windsor Castle. Wells with
water table The water table is the upper surface of the zone of saturation. The zone of saturation is where the pores and fractures of the ground are saturated with water. It can also be simply explained as the depth below which the ground is saturated. T ...
s that mixed with tributaries (or the non-tidal Thames) faced such pollution with the widespread installation of the flush toilet in the 1850s.Peter Ackroyd, ''Thames: The Biography''. 272 & 274. In the 'Great Stink, Great Stink' of 1858, pollution in the river reached such an extreme that sittings of the British House of Commons, House of Commons at Westminster had to be abandoned. Chlorine-soaked drapes were hung in the windows of Parliament in an attempt to stave off the smell of the river, but to no avail. A concerted effort to contain the city's sewage by constructing massive Combined sewer, sewer systems on the north and south river embankments followed, under the supervision of engineer Joseph Bazalgette. Meanwhile, similar huge undertakings took place to ensure the water supply, with the building of reservoirs and pumping stations on the river to the west of London, slowly helping the quality of water to improve. The Victorian era was one of imaginative engineering. The coming of the railways added railway bridges to the earlier road bridges and also reduced commercial activity on the river. However, sporting and leisure use increased with the establishment of regattas such as Henley Royal Regatta, Henley and
the Boat Race The Boat Race is an annual set of rowing races between the Cambridge University Boat Club and the Oxford University Boat Club, traditionally rowed between open-weight eights on the River Thames in London, England. There are separate men's ...
. On 3 September 1878, one of the worst river disasters in England took place, when the crowded pleasure boat collided with the ''Bywell Castle'', killing over 640 people.


20th century

The growth of road transport, and the decline of the British Empire, Empire in the years following 1914, reduced the economic prominence of the river. During the Second World War, the protection of certain Thames-side facilities, particularly docks and water treatment plants, was crucial to the munitions and water supply of the country. The river's defences included the Maunsell forts in the estuary, and the use of barrage balloons to counter Luftwaffe, German bombers using the reflectivity and shapes of the river to navigate during the Blitz. In the post-war era, although the Port of London#The Port today, Port of London remains one of the UK's three main ports, most trade has moved downstream from central London. In the late 1950s, the discharge of methane gas in the depths of the river caused the water to bubble, and the toxins wore away at boats' propellers. The decline of heavy industry and tanneries, reduced use of oil-pollutants and improved sewage treatment have led to much better water quality compared to the late 19th and early- to mid-20th centuries and aquatic life has returned to its formerly 'dead' stretches. Alongside the entire river runs the Thames Path, a National Route for walkers and cyclists. In the early 1980s a pioneering flood control device, the
Thames Barrier The Thames Barrier is a retractable Flood barrier, barrier system built to protect the floodplain of most of Greater London from exceptionally high tides and storm surges moving up from the North Sea. It has been operational since 1982. When n ...
, was opened. It is closed to tides several times a year to prevent water damage to London's low-lying areas upstream (the 1928 Thames flood demonstrated the severity of this type of event). In the late 1990s, the long
Jubilee River The Jubilee River is a hydraulic channel in southern England. It is long and is on average wide. It was constructed in the late 1990s and early 2000s to take overflow from the River Thames and so alleviate flooding to areas in and around the ...
was built as a wide "naturalistic" flood relief channel from Taplow to
Eton Eton most commonly refers to Eton College, a public school in Eton, Berkshire, England. Eton may also refer to: Places *Eton, Berkshire, a town in Berkshire, England * Eton, Georgia, a town in the United States * Éton, a commune in the Meuse dep ...
to help reduce the flood risk in
Maidenhead Maidenhead is a market town in the Royal Borough of Windsor and Maidenhead in the county of Berkshire, England, on the southwestern bank of the River Thames. It had an estimated population of 70,374 and forms part of the border with southern Bu ...
,
Windsor Windsor may refer to: Places Australia * Windsor, New South Wales ** Municipality of Windsor, a former local government area * Windsor, Queensland, a suburb of Brisbane, Queensland **Shire of Windsor, a former local government authority around Wi ...
and Eton, although it appears to have increased flooding in the villages immediately downstream.


21st century

In 2010, the Thames won the largest environmental award in the world – the $350,000 International Riverprize. In August 2022, the source of the river moved five miles and is located beyond
Somerford Keynes Somerford Keynes (, ) is a village and civil parish in Gloucestershire, England, close to the River Thames and about 5 miles (8 km) from its source. It lies on the boundary with Wiltshire, midway between Cirencester, Swindon and Malmesbury. The ...
due to the heatwave in July 2022.


The active river

One of the major resources provided by the Thames is the water distributed as drinking water by
Thames Water Thames Water Utilities Ltd, known as Thames Water, is a large private utility company responsible for the public water supply and waste water treatment in most of Greater London, Luton, the Thames Valley, Surrey, Gloucestershire, north Wiltsh ...
, whose area of responsibility covers the length of the River Thames. The Thames Water Ring Main is the main distribution mechanism for water in London, with one major loop linking the
Hampton Hampton may refer to: Places Australia *Hampton bioregion, an IBRA biogeographic region in Western Australia *Hampton, New South Wales *Hampton, Queensland, a town in the Toowoomba Region * Hampton, Victoria Canada * Hampton, New Brunswick *Ha ...
, Walton-on-Thames, Walton, Ashford, Surrey, Ashford and Kempton Park, Surrey, Kempton Park Water Treatment Works with central London. In the past, commercial activities on the Thames included fishing (particularly eel trapping), coppicing willows and Willow, osiers which provided wood, and the operation of
watermill A watermill or water mill is a mill that uses hydropower. It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding), rolling, or hammering. Such processes are needed in the production of ...
s for flour and paper production and metal beating. These activities have largely disappeared. The Thames is popular for a wide variety of riverside housing, including high-rise flats in central London and chalets on the banks and islands upstream. Some people live in houseboats, typically around
Brentford Brentford is a suburban town in West London, England and part of the London Borough of Hounslow. It lies at the confluence of the River Brent and the Thames, west of Charing Cross. Its economy has diverse company headquarters buildings whi ...
and
Tagg's Island Tagg's Island, in the London Borough of Richmond upon Thames, is an island on the River Thames on the reach above Molesey Lock and just above Ash Island. Geography The centre of the island has a lake with river access and private moorings surr ...
.


Transport and tourism


The tidal river

In London there are many sightseeing tours in tourist boats, past the more famous riverside attractions such as the
Houses of Parliament The Palace of Westminster serves as the meeting place for both the House of Commons and the House of Lords, the two houses of the Parliament of the United Kingdom. Informally known as the Houses of Parliament, the Palace lies on the north bank ...
and the
Tower of London The Tower of London, officially His Majesty's Royal Palace and Fortress of the Tower of London, is a historic castle on the north bank of the River Thames in central London. It lies within the London Borough of Tower Hamlets, which is separa ...
as well as regular riverboat services co-ordinated by London River Services. London city Airport is situated on the Thames, in East London. Previously it was a dock.


The upper river

In summer, passenger services operate along the entire non-tidal river from Oxford to Teddington. The two largest operators are Salters Steamers and French Brothers. Salters operate services between Folly Bridge, Oxford and Staines. The whole journey takes four days and requires several changes of boat. French Brothers operate passenger services between Maidenhead and Hampton Court. Along the course of the river a number of smaller private companies also offer river trips at Oxford, Wallingford, Reading and Hampton Court. Many companies also provide boat hire on the river. The leisure navigation and sporting activities on the river have given rise to a number of businesses including boatbuilding, marinas, ships chandlers and salvage services.


Cable car

The London Cable Car over the Thames from the Greenwich Peninsula to the Royal Docks has been in operation since the 2012 Summer Olympics.


Police and lifeboats

The river is policed by five police forces. The Marine Support Unit, Thames Division is the River Police arm of London's Metropolitan Police, while Surrey Police,
Thames Valley Police Thames Valley Police is the territorial police force responsible for policing the Thames Valley, covering the counties of Berkshire, Buckinghamshire and Oxfordshire. It the largest non-metropolitan police force in England and Wales, covering a ...
, Essex Police and Kent Police have responsibilities on their parts of the river outside the metropolitan area. There is also a London Fire Brigade fire boat on the river. The river claims a number of lives each year. As a result of the Marchioness disaster in 1989 when 51 people died, the UK government, Government asked the Maritime and Coastguard Agency, the Port of London Authority and the Royal National Lifeboat Institution (RNLI) to work together to set up a dedicated Search and Rescue service for the tidal River Thames. As a result, there are four lifeboat stations on the River Thames: at Teddington Lifeboat Station, Teddington, Chiswick Lifeboat Station, Chiswick, Tower Lifeboat Station, Tower (based at Victoria Embankment/Waterloo Bridge) and Gravesend Lifeboat Station, Gravesend.


Navigation

The Thames is maintained for navigation by powered craft from the estuary as far as
Lechlade Lechlade () is a town at the southern edge of the Cotswolds in Gloucestershire, England, south of Birmingham and west of London. It is the highest point at which the River Thames is navigable, although there is a right of navigation that contin ...
in Gloucestershire and for very small craft to
Cricklade Cricklade is a town and civil parish on the River Thames in north Wiltshire, England, midway between Swindon and Cirencester. It is the first downstream town on the Thames. The parish population at the 2011 census was 4,227. History Cricklade ...
. The original towpath extends upstream from Putney Bridge as far as the connection with the now disused
Thames and Severn Canal The Thames and Severn Canal is a canal in Gloucestershire in the south-west of England, which was completed in 1789. It was conceived as part of a cargo route from Bristol and the Midlands to London, linking England's two largest rivers for bett ...
at Inglesham, one and a half miles upstream of the St John's Lock, last boat lock near
Lechlade Lechlade () is a town at the southern edge of the Cotswolds in Gloucestershire, England, south of Birmingham and west of London. It is the highest point at which the River Thames is navigable, although there is a right of navigation that contin ...
. From Teddington Lock to the head of navigation, the navigation authority is the
Environment Agency The Environment Agency (EA) is a non-departmental public body, established in 1996 and sponsored by the United Kingdom government's Department for Environment, Food and Rural Affairs, with responsibilities relating to the protection and enha ...
. Between the sea and
Teddington Lock Teddington Lock is a complex of three lock (water transport), locks and a weir on the River Thames between Ham, London, Ham and Teddington in the London Borough of Richmond upon Thames, England. Historically in Middlesex, it was first buil ...
, the river forms part of the
Port of London The Port of London is that part of the River Thames in England lying between Teddington Lock and the defined boundary (since 1968, a line drawn from Foulness Point in Essex via Gunfleet Old Lighthouse to Warden Point in Kent) with the North Sea ...
and navigation is administered by the Port of London Authority. Both the tidal river through London and the non-tidal river upstream are intensively used for leisure navigation. The non-tidal River Thames is divided into reaches by the 45 lock (water transport), locks. The locks are staffed for the greater part of the day, but can be operated by experienced users out of hours. This part of the Thames links to existing navigations at the River Wey Navigation, the River Kennet and the
Oxford Canal The Oxford Canal is a narrowboat canal in central England linking the City of Oxford with the Coventry Canal at Hawkesbury (just north of Coventry and south of Bedworth) via Banbury and Rugby. Completed in 1790, it connects to the River Thame ...
. All craft using it must be licensed. The
Environment Agency The Environment Agency (EA) is a non-departmental public body, established in 1996 and sponsored by the United Kingdom government's Department for Environment, Food and Rural Affairs, with responsibilities relating to the protection and enha ...
has patrol boats (named after tributaries of the Thames) and can enforce the limit strictly since river traffic usually has to pass through a lock at some stage. A speed limit of applies. There are pairs of Navigation transit markers, transit markers at various points along the non-tidal river that can be used to check speed – a boat travelling legally taking a minute or more to pass between the two markers. The tidal river is navigable to large ocean-going ships as far upstream as the Pool of London and
London Bridge Several bridges named London Bridge have spanned the River Thames between the City of London and Southwark, in central London. The current crossing, which opened to traffic in 1973, is a box girder bridge built from concrete and steel. It r ...
. Although London's upstream enclosed docks have closed and central London sees only the occasional visiting cruise ship or naval ship, warship, the tidal river remains one of Britain's main ports. Around 60 active terminals cater for shipping of all types including ro-ro ferries, cruise liners and vessels carrying Containerization, containers, vehicles, timber, grain, paper, Petroleum, crude oil, petroleum products, liquified petroleum gas etc. There is a regular traffic of Construction aggregate, aggregate or waste, refuse vessels, operating from wharf, wharves in the west of London. The tidal Thames links to the canal network at the River Lea Navigation, the Regent's Canal at Limehouse Basin and the
Grand Union Canal The Grand Union Canal in England is part of the British canal system. It is the principal navigable waterway between London and the Midlands. Starting in London, one arm runs to Leicester and another ends in Birmingham, with the latter st ...
at Brentford. Upstream of Wandsworth Bridge a speed limit of is in force for powered craft to protect the riverbank environment and to provide safe conditions for rowers and other river users. There is no absolute speed limit on most of the Tideway downstream of Wandsworth Bridge, although boats are not allowed to create undue wash. Powered boats are limited to 12 knots between Lambeth Bridge and downstream of Tower Bridge, with some exceptions. Boats can be approved by the Harbourmaster, harbour master to travel at speeds of up to 30 knots from below Tower Bridge to past the Thames Barrier.


History of the management of the river

In the Middle Ages the Crown exercised general jurisdiction over the Thames, one of the four royal rivers, and appointed water bailiffs to oversee the river upstream of Staines. The City of London exercised jurisdiction over the tidal Thames. However, navigation was increasingly impeded by
weir A weir or low head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level. Weirs are also used to control the flow of water for outlets of l ...
s and mills, and in the 14th century the river probably ceased to be navigable for heavy traffic between Henley and Oxford. In the late 16th century the river seems to have been reopened for navigation from Henley to Burcot, Oxfordshire, Burcot. The first commission concerned with the management of the river was the Oxford-Burcot Commission, formed in 1605 to make the river navigable between Burcot and Oxford. In 1751 the Thames Navigation Commission was formed to manage the whole non-tidal river above Staines. The City of London long claimed responsibility for the tidal river. A long running dispute between the City and the Crown over ownership of the river was not settled until 1857, when the
Thames Conservancy The Thames Conservancy (formally the Conservators of the River Thames) was a body responsible for the management of the that river in England. It was founded in 1857 to replace the jurisdiction of the City of London up to Staines. Nine years la ...
was formed to manage the river from Staines downstream. In 1866 the functions of the Thames Navigation Commission were transferred to the Thames Conservancy, which thus had responsibility for the whole river. In 1909 the powers of the Thames Conservancy over the tidal river, below Teddington, were transferred to the Port of London Authority. In 1974 the Thames Conservancy became part of the new Thames Water Authority. When Thames Water was privatised in 1990, its river management functions were transferred to the National Rivers Authority, in 1996 subsumed into the
Environment Agency The Environment Agency (EA) is a non-departmental public body, established in 1996 and sponsored by the United Kingdom government's Department for Environment, Food and Rural Affairs, with responsibilities relating to the protection and enha ...
. In 2010, the Thames won the world's largest environmental award at the time, the $350,000 International Riverprize, presented at the International Riversymposium in Perth, WA in recognition of the substantial and sustained restoration of the river by many hundreds of organisations and individuals since the 1950s.


The river as a boundary

Until enough crossings were established, the river presented a formidable barrier, with Belgic tribes and Anglo-Saxon kingdoms being defined by which side of the river they were on. When English counties were established their boundaries were partly determined by the Thames. On the northern bank were the ancient counties of
Gloucestershire Gloucestershire ( abbreviated Glos) is a county in South West England. The county comprises part of the Cotswold Hills, part of the flat fertile valley of the River Severn and the entire Forest of Dean. The county town is the city of Gl ...
, Oxfordshire, Buckinghamshire, Middlesex and
Essex Essex () is a county in the East of England. One of the home counties, it borders Suffolk and Cambridgeshire to the north, the North Sea to the east, Hertfordshire to the west, Kent across the estuary of the River Thames to the south, and G ...
. On the southern bank were the counties of Wiltshire, Berkshire,
Surrey Surrey () is a ceremonial and non-metropolitan county in South East England, bordering Greater London to the south west. Surrey has a large rural area, and several significant urban areas which form part of the Greater London Built-up Area. ...
and Kent. Counting bridges to the far bank or to an island connected to such, the Thames has 223. From source to mouth a channel can be found with 138 bridges, plus the temporary footbridge often added during Reading Festival. The river is heavily splayed in
Ashton Keynes Ashton Keynes is a village and civil parish in north Wiltshire, England which borders with Gloucestershire. The village is about south of Cirencester and west of Cricklade. At the 2011 census the population of the parish, which includes the ...
and
Oxford Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...
. Where the river is wide 17 tunnels that have been built, many of which for rail or notable electricity cables. The crossings have changed the dynamics and made cross-river development and shared responsibilities more practicable. In 1965, upon the creation of
Greater London Greater may refer to: *Greatness, the state of being great *Greater than, in inequality (mathematics), inequality *Greater (film), ''Greater'' (film), a 2016 American film *Greater (flamingo), the oldest flamingo on record *Greater (song), "Greate ...
, the London Borough of Richmond upon Thames incorporated the former 'Middlesex and Surrey' banks, Borough of Spelthorne, Spelthorne moved from Middlesex to Surrey; and further changes in 1974 moved some of the boundaries away from the river. For example, some areas were transferred from Berkshire to Oxfordshire, and from Buckinghamshire to Berkshire. In many river sports and traditions – for example in rowing – the banks are referred to by their traditional county names.


Crossings

Many of the present-day road bridges are on the site of earlier fords, ferries and wooden bridges. Swinford Bridge, known as the five pence toll bridge, replaced a ferry that in turn replaced a ford. The earliest known major crossings of the Thames by the Romans were at
London Bridge Several bridges named London Bridge have spanned the River Thames between the City of London and Southwark, in central London. The current crossing, which opened to traffic in 1973, is a box girder bridge built from concrete and steel. It r ...
and Staines Bridge. At Folly Bridge in Oxford the remains of an original Saxon structure can be seen, and medieval stone bridges such as Newbridge, Oxfordshire, Newbridge, Wallingford Bridge and Abingdon Bridge are still in use. Kingston's growth is believed to stem from its having the only crossing between London Bridge and Staines until the beginning of the 18th century. During the 18th century, many stone and brick road bridges were built from new or to replace existing bridges both in London and along the length of the river. These included Putney Bridge, Westminster Bridge, Datchet Bridge, Windsor Bridge and Sonning Bridge. Several central London road bridges were built in the 19th century, most conspicuously Tower Bridge, the only Bascule bridge on the river, designed to allow ocean-going ships to pass beneath it. The most recent road bridges are the bypasses at Isis Bridge and Marlow By-pass Bridge and the motorway bridges, most notably the two on the M25 motorway, M25 route: Queen Elizabeth II Bridge and M25 Runnymede Bridge. Railway development in the 19th century resulted in a spate of bridge building including Blackfriars Railway Bridge and Hungerford Bridge, Charing Cross (Hungerford) Railway Bridge in central London, and the railway bridges by Isambard Kingdom Brunel at Maidenhead Railway Bridge, Gatehampton Railway Bridge and Moulsford Railway Bridge. The world's first underwater tunnel was Marc Brunel's Thames Tunnel built in 1843 and now used to carry the East London Line. The Tower Subway was the first railway under the Thames, which was followed by all the deep-level tube lines. Road tunnels were built in East London at the end of the 19th century, being the Blackwall Tunnel and the Rotherhithe Tunnel. The latest tunnels are the Dartford Crossings. Many foot crossings were established across the weirs that were built on the non-tidal river, and some of these remained when the locks were built – for example at Benson Lock. Others were replaced by a footbridge when the weir was removed as at Hart's Weir Footbridge. Around 2000, several footbridges were added along the Thames, either as part of the Thames Path or in commemoration of the millennium. These include Temple Footbridge, Bloomers Hole Footbridge, the Hungerford Footbridges and the London Millennium Bridge, Millennium Bridge, all of which have distinctive design characteristics. Before bridges were built, the main means of crossing the river was by ferry. A significant number of ferries were provided specifically for navigation purposes. When the towpath changed sides, it was necessary to take the towing horse and its driver across the river. This was no longer necessary when barges were powered by steam. Some ferries still operate on the river. The Woolwich Ferry carries cars and passengers across the river in the Thames Gateway and links the North Circular and South Circular Road, London, South Circular roads. Upstream are smaller pedestrian ferries, for example Hampton Ferry (River Thames), Hampton Ferry and Shepperton to Weybridge Ferry, the last being the only non-permanent crossing that remains on the Thames Path.


Hydro-power

Whilst the use of the river to drive water-mills has largely died out, there has been a recent trend to use the head of water provided by the river's existing weirs to drive small hydro-electric power plants, using Archimedes screw turbines. Operational schemes include: * A privately owned plant opened at Mapledurham Watermill in 2011, running in parallel to the waterwheel driven corn mill that still operates occasionally. * A hydro-electric plant at Romney Lock to power Windsor Castle using two Archimedes' screws, opened in 2013 by Elizabeth II, Queen Elizabeth II. * Osney Lock Hydro, a community owned scheme at Osney Lock in
Oxford Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...
, also opened in 2013. * Sandford Hydro, a community owned scheme at Sandford Lock to the south of Oxford, opened in 2017. * Reading Hydro, a community owned scheme at Caversham Lock in
Reading Reading is the process of taking in the sense or meaning of Letter (alphabet), letters, symbols, etc., especially by Visual perception, sight or Somatosensory system, touch. For educators and researchers, reading is a multifaceted process invo ...
, opened in 2021.


Pollution


Treated sewage

Treated sewage, waste water from all the towns and villages in the Thames catchment flow into the Thames via sewage treatment plants. This includes all that from Swindon, Oxford, Berkshire and almost all of Surrey. However, untreated sewage still often enters the Thames during wet weather. When London sewerage system, London's sewerage system was built, sewers were designed to overflow through discharge points along the river during heavy storms. Originally, this would happen once or twice a year, however overflows now happen once a week on average. In 2013, over 55 tonnes of dilute raw sewage overflowed into the tidal Thames. These discharge events kill fish, leave raw sewage on the riverbanks, and decrease the water quality of the river. To reduce the release of this into the river, the Thames Tideway Scheme is currently under construction at a cost of £4.2 billion. This project will collect sewage from the Greater London area before it Combined sewage overflow, overflows, before channelling it down a 25 km (15 mi) tunnel underneath the tidal Thames, so that it can be treated at Beckton Sewage Treatment Works. The project is planned to reduce sewage discharges into the Thames in the Greater London area by 90%, dramatically increasing water quality.


Mercury levels

Mercury (element), Mercury (Hg) is an environmentally persistent heavy metal which can be toxic to marine life and humans. Sixty sediment cores of 1 m in depth, spanning the entire tidal River Thames between
Brentford Brentford is a suburban town in West London, England and part of the London Borough of Hounslow. It lies at the confluence of the River Brent and the Thames, west of Charing Cross. Its economy has diverse company headquarters buildings whi ...
and the Isle of Grain, have been analysed for total Hg. The sediment records show a clear rise and fall of Hg pollution through history. Mercury concentrations in the River Thames decrease downstream from London to the outer Estuary, with the total Hg levels ranging from 0.01 to 12.07 mg/kg, giving a mean of 2.10 mg/kg which is higher than many other UK and European river estuaries. The most sedimentary-hosted Hg pollution in the Thames estuary occurs in the central London area between Vauxhall Bridge and Woolwich. The majority of sediment cores show a clear decrease in Hg concentrations close to the surface, which is attributed to an overall reduction in polluting activities as well as improved effectiveness of recent environmental legalisation and river management (e.g. Oslo-Paris convention).


Sport

There are several watersports prevalent on the Thames, with many clubs encouraging participation and organising racing and inter-club competitions.


Rowing

The Thames is the historic heartland of sport rowing, rowing in the United Kingdom. There are over 200 clubs on the river, and over 8,000 members of British Rowing (over 40% of its membership). Most towns and districts of any size on the river have at least one club. Internationally attended centres are
Oxford Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...
,
Henley-on-Thames Henley-on-Thames ( ) is a town and civil parish on the River Thames in Oxfordshire, England, northeast of Reading, west of Maidenhead, southeast of Oxford and west of London (by road), near the tripoint of Oxfordshire, Berkshire and Buc ...
and events and clubs on the stretch of river from
Chiswick Chiswick ( ) is a district of west London, England. It contains Hogarth's House, the former residence of the 18th-century English artist William Hogarth; Chiswick House, a neo-Palladian villa regarded as one of the finest in England; and Full ...
to
Putney Putney () is a district of southwest London, England, in the London Borough of Wandsworth, southwest of Charing Cross. The area is identified in the London Plan as one of 35 major centres in Greater London. History Putney is an ancient paris ...
. Two rowing events on the River Thames are traditionally part of the wider English sporting calendar: The The Boat Race, University Boat Race (between Oxford University Boat Club, Oxford and Cambridge University Boat Club, Cambridge) takes place in late March or early April, on the The Championship Course, Championship Course from
Putney Putney () is a district of southwest London, England, in the London Borough of Wandsworth, southwest of Charing Cross. The area is identified in the London Plan as one of 35 major centres in Greater London. History Putney is an ancient paris ...
to Mortlake in the west of London.
Henley Royal Regatta Henley Royal Regatta (or Henley Regatta, its original name pre-dating Royal patronage) is a rowing event held annually on the River Thames by the town of Henley-on-Thames, England. It was established on 26 March 1839. It differs from the thre ...
takes place over five days at the start of July in the upstream town of
Henley-on-Thames Henley-on-Thames ( ) is a town and civil parish on the River Thames in Oxfordshire, England, northeast of Reading, west of Maidenhead, southeast of Oxford and west of London (by road), near the tripoint of Oxfordshire, Berkshire and Buc ...
. Besides its sporting significance the regatta is an important date on the English Season (society), social calendar alongside events like Ascot Racecourse, Royal Ascot and Wimbledon Championships, Wimbledon. Other significant or historic rowing events on the Thames include: * The Head of the River Race and Women's Eights Head of the River Race (8+) (i.e. coxed eights), Schools' Head of the River Race, Schools' Head, Veterans Head, Scullers Head of the River Race, Scullers Head, Head of the River Fours, Fours Head (HOR4s), and Pairs Head (shorter) on the The Championship Course, Championship Course * The Wingfield Sculls on the same course: (1x) (single sculling) championship * Doggett's Coat and Badge for apprentice watermen of London, one of the oldest sporting events in the world * Henley Women's Regatta * The Henley Boat Races currently for the Lightweight (men's and women's) crews of Oxford and Cambridge universities * The Oxford University bumps race, bumping races known as Eights Week and Torpids Other regattas, head races and university bumping races are held along the Thames which are described under Rowing on the River Thames.


Sailing

Sailing is practised on both the tidal and non-tidal reaches of the river. The highest club upstream is at Oxford. The most popular sailing craft used on the Thames are laser (dinghy), lasers, GP14 (dinghy), GP14s and Wayfarer (dinghy), Wayfarers. One sailing boat unique to the Thames is the Thames A Class Rater (scow), Thames Rater, which is sailed around Raven's Ait.


Skiffing

Skiffing has dwindled in favour of private motor boat ownership but is competed on the river in the summer months. Six clubs and a similar number of skiff regattas exist from the Skiff Club,
Teddington Teddington is a suburb in south-west London in the London Borough of Richmond upon Thames. In 2021, Teddington was named as the best place to live in London by ''The Sunday Times''. Historically in Middlesex, Teddington is situated on a long m ...
upstream.


Punting

Unlike the "pleasure punt (boat), punting" common on the Cherwell in
Oxford Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...
and the River Cam, Cam in Cambridge, punting on the Thames is competitive as well as recreational and uses narrower craft, typically based at the few skiff clubs.


Kayaking and canoeing

Kayaking Kayaking is the use of a kayak for moving over water. It is distinguished from canoeing by the sitting position of the paddler and the number of blades on the paddle. A kayak is a low-to-the-water, canoe-like boat in which the paddler sits fac ...
and
canoeing Canoeing is an activity which involves paddling a canoe with a single-bladed paddle. Common meanings of the term are limited to when the canoeing is the central purpose of the activity. Broader meanings include when it is combined with other acti ...
are common, with sea kayakers using the tidal stretch for touring. Kayakers and canoeists use the tidal and non-tidal sections for training, racing and trips. Whitewater playboating, playboaters and slalom canoeing, slalom paddlers are catered for at
weir A weir or low head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level. Weirs are also used to control the flow of water for outlets of l ...
s like those at Hurley Lock, Sunbury Lock and Boulter's Lock. At Teddington just before the tidal section of the river starts is Royal Canoe Club, said to be the oldest in the world and founded in 1866. Since 1950, almost every year at Easter, long distance canoeists have been competing in what is now known as the Devizes to Westminster International Canoe Race, which follows the course of the
Kennet and Avon Canal The Kennet and Avon Canal is a waterway in southern England with an overall length of , made up of two lengths of navigable river linked by a canal. The name is used to refer to the entire length of the navigation rather than solely to the cent ...
, joins the River Thames at Reading and runs right up to a grand finish at Westminster Bridge.


Swimming

In 2006, British swimmer and environmental campaigner Lewis Pugh became the first person to swim the full length of the Thames from outside Kemble to Southend-on-Sea to draw attention to the severe drought in England which saw record temperatures indicative of a degree of global warming. The swim took him 21 days to complete. The official headwater of the river had stopped flowing due to the drought, forcing Pugh to run the first . Since June 2012, the Port of London Authority has made a by-law, which it enforces, that bans swimming between Putney Bridge and Crossness,
Thamesmead Thamesmead is an area of south-east London, England, straddling the border between the Royal Borough of Greenwich and the London Borough of Bexley. It is located east of Charing Cross, north-east of Woolwich and west of Erith. It mainly consi ...
(thus including all of central London), without obtaining prior permission, on the grounds that swimmers in that area of the river endanger not only themselves, due to the strong current of the river, but also other river users. Organised swimming events take place at various points generally upstream of Hampton Court, including Windsor, Marlow and Henley. In 2011, comedian David Walliams swam the from Lechlade to Westminster Bridge and raised over £1 million for charity. In non-tidal stretches swimming was, and still is, a leisure and fitness activity among experienced swimmers where safe, deeper outer channels are used in times of low stream.


Meanders

A Thames meander is a long-distance journey over all or part of the Thames by running, swimming or using any of the above means. It is often carried out as an athletic challenge in a competition or for a record attempt.


The Thames in the arts

File:Brooklyn Museum - Houses of Parliament Sunlight Effect (Le Parlement effet de soleil) - Claude Monet.jpg, Houses of Parliament Sunlight Effect (Le Parlement effet de soleil) – Claude Monet File:Canaletto - Westminster Bridge, with the Lord Mayor's Procession on the Thames - Google Art Project.jpg, The first Westminster Bridge as painted by Canaletto in 1746. Image:Canaletto london.jpg, ''The River Thames from Richmond House'' by Canaletto, 1747 Rain Steam and Speed the Great Western Railway.jpg, Rain, Steam and Speed – The Great Western Railway, Maidenhead Railway Bridge as J. M. W. Turner, Turner saw it in 1844 London, the Houses of Parliament, Sunlight Opening in Fog, by Claude Monet.jpg, Claude Monet, Monet's ''Trouée de soleil dans le brouillard'', Houses of Parliament series (Monet), Houses of Parliament, London, Sun Breaking Through the Fog, 1904 File:James Abbot McNeill Whistler 006.jpg, James Abbott McNeill Whistler, Whistler's ''Nocturne in Blue and Gold: Old Battersea Bridge'' (c. 1872–1875) File:Brooklyn Museum - Foggy Morning on the Thames - James Hamilton - overall.jpg, ''Foggy Morning on the Thames'' – James Hamilton (between 1872 and 1878) File:Boating on the Thames by John Lavery.jpeg, ''Boating on the Thames'' - John Lavery, circa 1890


Visual arts

The River Thames has been a subject for artists, great and minor, over the centuries. Four major artists with works based on the Thames are Canaletto, J. M. W. Turner, Claude Monet and James Abbott McNeill Whistler. The 20th-century British artist Stanley Spencer produced many works at Cookham. John Kaufman's sculpture ''The Diver, The Diver: Regeneration'' is sited in the Thames near Rainham, London, Rainham. The river and bridges are portrayed as being destroyed – together with much of London – in the film ''Independence Day 2''.


Literature

The Thames is mentioned in many works of literature including novels, diaries and poetry. It is the central theme in three in particular: ''Three Men in a Boat'' by Jerome K. Jerome, first published in 1889, is a humorous account of a boating holiday on the Thames between Kingston upon Thames, Kingston and
Oxford Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...
. The book was intended initially to be a serious travel guide, with accounts of local history of places along the route, but the humorous elements eventually took over. The landscape and features of the Thames as described by Jerome are virtually unchanged, and the book's enduring popularity has meant that it has never been out of print since it was first published. Charles Dickens' ''Our Mutual Friend'' (written in the years 1864–65) describes the river in a grimmer light. It begins with a scavenger and his daughter pulling a dead man from the river near London Bridge, to salvage what the body might have in its pockets, and leads to its conclusion with the deaths of the villains drowned in Shepperton Lock, Plashwater Lock upstream. The workings of the river and the influence of the tides are described with great accuracy. Dickens opens the novel with this sketch of the river, and the people who work on it:
''In these times of ours, though concerning the exact year there is no need to be precise, a boat of dirty and disreputable appearance, with two figures in it, floated on the Thames, between Southwark Bridge which is of iron, and
London Bridge Several bridges named London Bridge have spanned the River Thames between the City of London and Southwark, in central London. The current crossing, which opened to traffic in 1973, is a box girder bridge built from concrete and steel. It r ...
which is of stone, as an autumn evening was closing in.'' ''The figures in this boat were those of a strong man with ragged grizzled hair and a sun-browned face, and a girl of nineteen or twenty. The girl rowed, pulling a pair of sculls very easily; the man with the rudder-lines slack in his hands, and his hands loose in his waisteband, kept an eager look-out.''
Kenneth Grahame's ''The Wind in the Willows'', written in 1908, is set in the middle to upper reaches of the river. It starts as a tale of anthropomorphic characters "simply messing about in boats" but develops into a more complex story combining elements of mysticism with adventure and reflection on Edwardian era, Edwardian society. It is generally considered one of the most beloved works of children's literature and the illustrations by E.H.Shepard and Arthur Rackham feature the Thames and its surroundings. The river almost inevitably features in many books set in London. Most of Dickens' other novels include some aspect of the Thames. ''Oliver Twist'' finishes in the slums and rookery (slum), rookeries along its south bank. The Sherlock Holmes stories by Arthur Conan Doyle often visit riverside parts as in ''The Sign of the Four, The Sign of Four''. In ''Heart of Darkness'' by Joseph Conrad, the serenity of the contemporary Thames is contrasted with the savagery of the Congo River, and with the wilderness of the Thames as it would have appeared to a Roman soldier posted to Britannia two thousand years before. Conrad also gives a description of the approach to London from the
Thames Estuary The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain. Limits An estuary can be defined according to different criteria (e.g. tidal, geographical, navigational or in terms of salini ...
in his essays ''q:Joseph Conrad#On the River Thames, The Mirror of the Sea'' (1906). Upriver, Henry James' ''Portrait of a Lady'' uses a large riverside mansion on the Thames as one of its key settings. Literary non-fiction works include Samuel Pepys' diary, in which he recorded many events relating to the Thames including the Fire of London. He was disturbed while writing it in June 1667 by the sound of gunfire as Dutch warships broke through the Royal Navy on the Thames. In poetry, William Wordsworth's sonnet Composed upon Westminster Bridge, September 3, 1802, On Westminster Bridge closes with the lines: :Ne'er saw I, never felt, a calm so deep! :The river glideth at his own sweet will: :Dear God! the very houses seem asleep; :And all that mighty heart is lying still! T. S. Eliot makes several references to the Thames in ''The Fire Sermon, Section III'' of ''The Waste Land''. :Sweet Thames run softly, till I end my song. :The river bears no empty bottles, sandwich papers, :Silk handkerchiefs, cardboard boxes cigarette ends :Or other testimony of summer nights. and :The river sweats :Oil and tar :The barges drift :With the turning tide :Red sails :Wide :To leeward, swing on the heavy spar, :The barges wash :Drifting logs :Down Greenwich reach :Past the Isle of Dogs The ''Sweet Thames'' line is taken from Edmund Spenser's ''Prothalamion'' which presents a more idyllic image: :Along the shoare of silver streaming Themmes; :Whose rutty banke, the which his river hemmes, :Was paynted all with variable flowers. :And all the meads adorn'd with daintie gemmes :Fit to deck maydens bowres Also writing of the upper reaches is Matthew Arnold in ''The Scholar Gypsy'': :Crossing the stripling Thames at Bab-lock-hythe :Trailing in the cool stream thy fingers wet :As the slow punt swings round :Oh born in days when wits were fresh and clear :And life ran gaily as the sparkling Thames; :Before this strange disease of modern life. Wendy Cope's poem 'After the Lunch' is set on Waterloo Bridge, beginning: :On Waterloo Bridge, where we said our goodbyes, :The weather conditions bring tears to my eyes. :I wipe them away with a black woolly glove, :And try not to notice I’ve fallen in love. Dylan Thomas mentions the Thames in his poem "A Refusal to Mourn the Death, by Fire, of a Child in London". "London's Daughter", the subject of the poem, lays "Deep with the first dead...secret by the unmourning water of the riding Thames". Science-fiction novels make liberal use of a futuristic Thames. The utopian ''News from Nowhere'' by William Morris is mainly the account of a journey through the Thames valley in a socialist future. The Thames features in H. G. Wells' ''The War of the Worlds''. The Thames also features prominently in Philip Pullman's ''His Dark Materials'' trilogy, as a communications artery for the waterborne Gyptian people of Oxford and the The Fens, Fens, and as a prominent setting for his novel La Belle Sauvage. In ''The Deptford Mice'' trilogy by Robin Jarvis, the Thames appears several times. In one book, rat characters swim through it to
Deptford Deptford is an area on the south bank of the River Thames in southeast London, within the London Borough of Lewisham. It is named after a ford of the River Ravensbourne. From the mid 16th century to the late 19th it was home to Deptford Dock ...
. Winner of the Nestlé Smarties Book Prize, Nestlé Children's Book Prize Gold Award ''I, Coriander'', by Sally Gardner is a fantasy novel in which the heroine lives on the banks of the Thames. Mark Wallington (writer), Mark Wallington describes a journey up the Thames in a camping skiff, in his 1989 book ''Boogie up the River''. Many of the principal characters of the Peter Grant (book series), Rivers of London urban fantasy series by Ben Aaronovitch are genius loci, genii locorum (local gods) associated with River Thames and its tributaries. This includes List of water deities#English Folklore, Father Thames, the original god of the Thames but now (in the books) confined to non-tidal reaches above
Teddington Lock Teddington Lock is a complex of three lock (water transport), locks and a weir on the River Thames between Ham, London, Ham and Teddington in the London Borough of Richmond upon Thames, England. Historically in Middlesex, it was first buil ...
and Mama Thames the goddess of the tidal Thames below Teddington.


Music

The Water Music (Handel), Water Music composed by George Frideric Handel premiered on 17 July 1717, when George I of Great Britain, King George I requested a concert on the River Thames. The concert was performed for King George I on his barge and he is said to have enjoyed it so much that he ordered the 50 exhausted musicians to play the suites three times on the trip. The song 'Old Father Thames' was recorded by Peter Dawson (bass-baritone), Peter Dawson at Abbey Road Studios in 1933 and by Gracie Fields five years later. Jessie Matthews sings "My river" in the 1938 film ''Sailing Along'', and the tune is the centrepiece of a major dance number near the end of the film. The Sex Pistols played a concert on the ''Queen Elizabeth Riverboat'' on 7 June 1977, Elizabeth II, Queen Elizabeth II's Silver Jubilee year, while sailing down the river. The choral line "(I) ''(liaised)'' live by the river" in the song "London Calling (song), London Calling" by the Clash refers to the River Thames. Two songs by the Kinks feature the Thames as the setting of the first song's title and, for the second song, arguably in its mention of 'the river': "Waterloo Sunset" is about a couple's meetings on Waterloo Bridge, London and starts: "Dirty old river, must you keep rolling, flowing into the night?" and continues "Terry meets Julie, London Waterloo station, Waterloo station" and "...but Terry and Julie cross over the river where they feel safe and sound...". "See My Friends" continually refers to the singer's friends "playing 'cross the river" instead of the girl who "just left". Furthermore, Ray Davies as a solo artist refers to the river Thames in his "London Song". Ewan MacColl's "Sweet Thames, Flow Softly", written in the early 1960s, is a tragic love ballad set on trip up the river (see Edmund Spenser's love poem's refrain above). Culture Club are travelling the River Thames in a riverboat in the video for "Karma Chameleon". English musician Imogen Heap wrote a song from the point of view of the River Thames entitled "You Know Where To Find Me". The song was released in 2012 on 18 October as the sixth single from her fourth album Sparks (Imogen Heap album), Sparks.


Major flood events


London flood of 1928

The 1928 Thames flood was a disastrous flood of the River Thames that affected much of riverside London on 7 January 1928, as well as places further downriver. Fourteen people were drowned in London and thousands were made homeless when flood waters poured over the top of the Thames Embankment and part of the Chelsea Embankment collapsed. It was the last major flood to affect
central London Central London is the innermost part of London, in England, spanning several boroughs. Over time, a number of definitions have been used to define the scope of Central London for statistics, urban planning and local government. Its characteris ...
, and, particularly following the disastrous North Sea flood of 1953, helped lead to the implementation of new flood-control measures that culminated in the construction of the
Thames Barrier The Thames Barrier is a retractable Flood barrier, barrier system built to protect the floodplain of most of Greater London from exceptionally high tides and storm surges moving up from the North Sea. It has been operational since 1982. When n ...
in the 1970s.


Thames Valley flood of 1947

The 1947 Thames flood was overall the worst 20th-century flood of the River Thames, affecting much of the
Thames Valley The Thames Valley is an informally-defined sub-region of South East England, centred on the River Thames west of London, with Oxford as a major centre. Its boundaries vary with context. The area is a major tourist destination and economic hub, ...
as well as elsewhere in England during the middle of March 1947 after a very Winter of 1946–1947, severe winter. The floods were caused by of rainfall (including snow); the peak flow was of water per day and the damage cost a total of £12 million to repair. World War II, War damage to some of the Lock (water transport), locks made matters worse. Other significant Thames floods since 1947 have occurred in 1968, 1993, 1998, 2000, 2003, 2006 and 2014.


Canvey Island flood of 1953

On the night of 31 January, the North Sea flood of 1953 devastated the island, taking the lives of 58 islanders, and led to the temporary evacuation of the 13,000 residents.Canvey Island's 13,000 refugees
. (2 February 1953). ''The Guardian'' (London), p. 1. Retrieved 29 July 2008.
Canvey is consequently protected by modern sea defences comprising of concrete seawall."Canvey Island Drainage scheme 2006". Environment agency. (May Avenue Pumping Station information board). Many of the victims were in the holiday bungalows of the eastern Newlands estate and perished as the water reached ceiling level. The small village area of the island is approximately above sea level and consequently escaped the effects of the flood.


See also

* Dartford Cable Tunnel * Foreshore of the River Thames * List of locations in the Port of London * List of rivers of the United Kingdom * Nore *
River and Rowing Museum The River & Rowing Museum in Henley-on-Thames, Oxfordshire, England, is located on a site at Mill Meadows by the River Thames. It has three main themes represented by major permanent galleries, the non-tidal River Thames, the international ...
* Steamboat – reference Thames Steamboats * Subterranean rivers of London * Thames Discovery Programme * Thames sailing barge * Thames steamers * Tyburn (stream)


References


Further reading

* * * * * * * * *


External links


Where Thames Smooth Waters Glide – Pictures and history and tides and poetry and conditions

The River Thames Society

Thames Path National Trail

River Thames London Hired Boats and News Blog

BBC 4 documentary ''In search of Arcadia'' features the river
{{Authority control River Thames, Thames drainage basin, Rivers of Berkshire, Thames, River Rivers of Buckinghamshire, Thames, River Rivers of Essex, Thames, River Rivers of Gloucestershire, Thames, River Rivers of Kent, Thames, River Rivers of London, Thames, River Rivers of Oxfordshire, Thames, River Rivers of Surrey, Thames, River Rivers of Wiltshire, Thames, River River navigations in the United Kingdom, Thames Tourist attractions in London, Thames, River Rivers with fish ladders