Northern Ireland Northern Ireland ( ga, Tuaisceart Éireann ; sco, label= Ulster-Scots, Norlin Airlann) is a part of the United Kingdom, situated in the north-east of the island of Ireland, that is variously described as a country, province or region. Nort ...

Slieve Croob __NOTOC__ Slieve Croob () is a mountain with a height of in the middle of County Down, Northern Ireland. It is the heart of a mountainous area known as the Dromara Hills, north of the Mourne Mountains. It is designated an Area of Outstanding Nat ...

County Down County Down () is one of the six counties of Northern Ireland, one of the nine counties of Ulster and one of the traditional thirty-two counties of Ireland. It covers an area of and has a population of 531,665. It borders County Antrim to the ...

Belfast Belfast ( , ; from ga, Béal Feirste , meaning 'mouth of the sand-bank ford') is the capital and largest city of Northern Ireland, standing on the banks of the River Lagan on the east coast. It is the 12th-largest city in the United Kingdo ...

Belfast Lough Belfast Lough is a large, intertidal sea inlet on the east coast of Northern Ireland. At its head is the city and port of Belfast, which sits at the mouth of the River Lagan. The lough opens into the North Channel and connects Belfast to th ...

Irish Sea The Irish Sea or , gv, Y Keayn Yernagh, sco, Erse Sie, gd, Muir Èireann , Ulster-Scots: ''Airish Sea'', cy, Môr Iwerddon . is an extensive body of water that separates the islands of Ireland and Great Britain. It is linked to the Ce ...

County Antrim County Antrim (named after the town of Antrim, ) is one of six counties of Northern Ireland and one of the thirty-two counties of Ireland. Adjoined to the north-east shore of Lough Neagh, the county covers an area of and has a population o ...

County Down County Down () is one of the six counties of Northern Ireland, one of the nine counties of Ulster and one of the traditional thirty-two counties of Ireland. It covers an area of and has a population of 531,665. It borders County Antrim to the ...

Ulster Ulster (; ga, Ulaidh or ''Cúige Uladh'' ; sco, label= Ulster Scots, Ulstèr or ''Ulster'') is one of the four traditional Irish provinces. It is made up of nine counties: six of these constitute Northern Ireland (a part of the United King ...

Donaghcloney Donaghcloney or Donacloney ()Dromore. On the lower slopes of the mountain, it combines with a branch from Legananny Mountain, just opposite Slieve Croob. The river then turns east to

Magheralin Magheralin () is a village and civil parish in County Down, Northern Ireland. It is on the main A3 road between Moira and Lurgan, beside the River Lagan. It had a population of 1,337 people in the 2011 Census. The civil parish of Magheralin c ...

into a broad plain between the plateaus of Antrim and Down. The river drains approximately 609 square km of agricultural land and flows to the Stranmillis Weir, from which point on it is

estuarine An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environment ...

. The catchment consists mainly of enriched agricultural grassland in the upper parts, with a lower section draining urban Belfast and

Lisburn Lisburn (; ) is a city in Northern Ireland. It is southwest of Belfast city centre, on the River Lagan, which forms the boundary between County Antrim and County Down. First laid out in the 17th century by English and Welsh settlers, with ...

. There is one significant tributary, the Ravernet River, and there are several minor tributaries, including the Carryduff River, the

River Farset The River Farset (''An Fhearsaid'' or ''Abhainn na Feirste'' in Irish) is a river in Belfast, Northern Ireland. It is a late tributary of the River Lagan. Course Rising on Squire's Hill on the north-western edge of Belfast, the River Farset ...

and the Blackstaff River. Water quality is generally fair, though there are localised problems and occasional pollution incidents, mainly due to effluent from farms. Work is proceeding to restore a self-sustaining population of

Atlantic salmon The Atlantic salmon (''Salmo salar'') is a species of ray-finned fish in the family Salmonidae. It is the third largest of the Salmonidae, behind Siberian taimen and Pacific Chinook salmon, growing up to a meter in length. Atlantic salmon are ...

to the river.

History

Ptolemy Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importanc ...

's ''

Geography Geography (from Greek: , ''geographia''. Combination of Greek words ‘Geo’ (The Earth) and ‘Graphien’ (to describe), literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, and ...

'' (2nd century AD) described a river called Λογια (''Logia''). The river name is thought to connect with

Old Irish Old Irish, also called Old Gaelic ( sga, Goídelc, Ogham script: ᚌᚑᚔᚇᚓᚂᚉ; ga, Sean-Ghaeilge; gd, Seann-Ghàidhlig; gv, Shenn Yernish or ), is the oldest form of the Goidelic/Gaelic language for which there are extensive writt ...

''loeg'' ("

calf Calf most often refers to: * Calf (animal), the young of domestic cattle. * Calf (leg), in humans (and other primates), the back portion of the lower leg Calf or calves may also refer to: Biology and animal byproducts * Veal, meat from calves * ...

") and with *''laks'' ("

salmon Salmon () is the common name for several list of commercially important fish species, commercially important species of euryhaline ray-finned fish from the family (biology), family Salmonidae, which are native to tributary, tributaries of the ...

").

The Lagan in Belfast

The name Belfast originates from the Irish ''Béal Feirste'', or the mouth of the Farset, the river on which the city was built and which flows into the Lagan. The Farset has been superseded by the River Lagan as the most important river. The Farset languishes in obscurity, covered over by the city's High Street.

Laganside Corporation

In 1989 the

Laganside Corporation The Laganside Corporation was a non-departmental public body formed by the Laganside Development (Northern Ireland) Order 1989 with the goal of regenerating large sections of land in Belfast, Northern Ireland adjacent to the River Lagan. This ...

was established by the

British government ga, Rialtas a Shoilse gd, Riaghaltas a Mhòrachd , image = HM Government logo.svg , image_size = 220px , image2 = Royal Coat of Arms of the United Kingdom (HM Government).svg , image_size2 = 180px , caption = Royal Arms , date_es ...

to redevelop the areas surrounding the Lagan in Belfast. Major developments of the Laganside Corporation along the river include the regeneration of the city's former Gasworks, the

Odyssey The ''Odyssey'' (; grc, Ὀδύσσεια, Odýsseia, ) is one of two major Ancient Greek literature, ancient Greek Epic poetry, epic poems attributed to Homer. It is one of the oldest extant works of literature still widely read by moder ...

entertainment and leisure development, and the Lanyon Place development, which includes the

Waterfront Hall Belfast Waterfront is a multi-purpose conference and entertainment centre, in Belfast, Northern Ireland, designed by local architects' firm Robinson McIlwaine. The hall is located in Lanyon Place, the flagship development of the Laganside Corpo ...

, in many ways the flagship of the corporation.

Lagan Weir

One of the earliest and most important undertakings of the Corporation was the

Lagan Weir The Lagan Weir, in Belfast, Northern Ireland, crosses the River Lagan between the Queen Elizabeth Bridge and the M3 cross-harbour bridge. Prior to the building of the weir, the river would be subject to tidal fluctuations, and low tide would ex ...

. Completed in 1994 at a cost of £14m, the weir controls the level of water upstream. One of the main functions of the weir was to reduce unsightly

mud flats Mudflats or mud flats, also known as tidal flats or, in Ireland, slob or slobs, are coastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers. A global analysis published in 2019 suggested that tidal fl ...

at low tide. This was mostly successful, but mud flats are still evident on the river. The weir is a series of massive steel barriers which are raised as the tide retreats so as to keep the river at an artificially constant level.

Lagan Weir The Lagan Weir, in Belfast, Northern Ireland, crosses the River Lagan between the Queen Elizabeth Bridge and the M3 cross-harbour bridge. Prior to the building of the weir, the river would be subject to tidal fluctuations, and low tide would ex ...

, dredging and aeration have increased water quality in the river, and salmon are returning. An otter and seals have followed the fish that now move up river to spawn in what was once an aquatic death trap.

Sport

The river is used by a number of rowing clubs, including Queen's University Boat Club, Queen's Ladies Boat Club, Methodist College Boat Club,

Royal Belfast Academical Institution The Royal Belfast Academical Institution is an independent grammar school in Belfast, Northern Ireland. With the support of Belfast's leading reformers and democrats, it opened its doors in 1814. Until 1849, when it was superseded by what today is ...

(RBAI) Rowing Club, Belfast Rowing Club (BRC) and Lagan Scullers Club

. The Boathouses are all based between the Governors Bridge and the Stranmillis Weir.

Dredging

In September 2010, dredging commenced on the river Lagan. The operation was expected to last until spring 2011.

The Lagan in Lisburn

In a similar way to the regeneration of Belfast riverside

Lisburn City Council Lisburn City Council was the local authority for an area partly in County Antrim and partly in County Down in Northern Ireland. As of May 2015 it was merged with Castlereagh Borough Council as part of the reform of local government in Northern ...

has embarked on a series of developments around the River Lagan. The centre-piece of this strategy has been the

Lagan Valley Island Lagan Valley Island is a conference and events centre located on a small Island in Lisburn City in Northern Ireland. The building was opened for business in March 2001 and was officially opened in November 2001 by Her Majesty the Queen. Lagan V ...

complex; a new headquarters for the council and an Arts Centre, wedding and conference facilities and a restaurant. Opened in 2001 the building is surrounded by the Lagan on one side and a channel linked to the river on the other.

The Lagan Navigation

In the late 19th century the Lagan Navigation was built from

Lough Neagh Lough Neagh ( ) is a freshwater lake in Northern Ireland and is the largest lake in the island of Ireland, the United Kingdom and the British Isles. It has a surface area of and supplies 40% of Northern Ireland's water. Its main inflows come ...

to Belfast, using some of the river as a navigable waterway and diverting water from other areas to supply separate canal sections. However, by the mid-20th century the route had fallen into disuse and was largely derelict. The

M1 motorway (Northern Ireland) The M1 is a motorway in Northern Ireland. It is the longest motorway in Northern Ireland and runs for from Belfast to Dungannon through County Antrim, County Down, County Armagh and County Tyrone. It forms part of the route via the A1 in No ...

was built across the route. Currently, the section of the navigation's

towpath A towpath is a road or trail on the bank of a river, canal, or other inland waterway. The purpose of a towpath is to allow a land vehicle, beasts of burden, or a team of human pullers to tow a boat, often a barge. This mode of transport ...

running from

Lisburn Lisburn (; ) is a city in Northern Ireland. It is southwest of Belfast city centre, on the River Lagan, which forms the boundary between County Antrim and County Down. First laid out in the 17th century by English and Welsh settlers, with ...

to almost the centre of

Belfast Belfast ( , ; from ga, Béal Feirste , meaning 'mouth of the sand-bank ford') is the capital and largest city of Northern Ireland, standing on the banks of the River Lagan on the east coast. It is the 12th-largest city in the United Kingdo ...

has been restored. A section of

National Cycle Route 9 Route The route will eventually connect Belfast and Dublin. The route is currently signposted between the Queen Elizabeth II Bridge in Belfast Newry. The portion south of Newry past Slieve Gullion was scrapped on safety grounds in 2020. ...

, which will eventually link

Belfast Belfast ( , ; from ga, Béal Feirste , meaning 'mouth of the sand-bank ford') is the capital and largest city of Northern Ireland, standing on the banks of the River Lagan on the east coast. It is the 12th-largest city in the United Kingdo ...

with

Dublin Dublin (; , or ) is the capital and largest city of Republic of Ireland, Ireland. On a bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, bordered on the south by the Dublin Mountains, a part of th ...

, follows this towpath.

Angling

Atlantic salmon The Atlantic salmon (''Salmo salar'') is a species of ray-finned fish in the family Salmonidae. It is the third largest of the Salmonidae, behind Siberian taimen and Pacific Chinook salmon, growing up to a meter in length. Atlantic salmon are ...

became extirpated in the River Lagan, which enters the

Irish Sea The Irish Sea or , gv, Y Keayn Yernagh, sco, Erse Sie, gd, Muir Èireann , Ulster-Scots: ''Airish Sea'', cy, Môr Iwerddon . is an extensive body of water that separates the islands of Ireland and Great Britain. It is linked to the Ce ...

through the port of Belfast, between 1750 and 1800, coinciding with a period of major population growth, industrialisation and the construction of a navigable waterway based on the river. The latest record of a salmon population in the river dates from 1744. From 1950 to 1990, water quality in the river improved as a result of improved sewage treatment, the Lagan Navigation was abandoned and fell into disuse, and many industrial effluents were diverted to sewer. A fish survey in the early 1970s found no fish at all in the urban reach of river through Belfast.

Brown trout The brown trout (''Salmo trutta'') is a European species of salmonid fish that has been widely introduced into suitable environments globally. It includes purely freshwater populations, referred to as the riverine ecotype, ''Salmo trutta'' morph ...

and several other species remained present in the upper reaches of the river throughout the worst of the downstream urban problems. The 1980s saw some recreational angling for non-migratory fish developing in the Belfast reaches of the river, and there were very occasional reports of migratory salmon or sea trout being seen in the river. In 1991, the first of a series of stockings took place and the first adult salmon returned to the Lagan in 1993.

Wildlife

Plants such as ''

Elodea ''Elodea'' is a genus of 6 species of aquatic plants often called the waterweeds described as a genus in 1803. Classified in the frog’s-bit family ( Hydrocharitaceae), ''Elodea'' is native to the Americas and is also widely used as aquarium ve ...

'' and others have been recorded from the Lagan.Hackney, P. (Ed) 1993. ''Stewart and Corry's Flora of the North-east of Ireland.'' Institute of Irish Studies and The Queen's University of Belfast. (HB) The river also hosts a population of otters and a variety of wildfowl. A breeding population of yellow bellied slider turtles also live in the river, thought to be abandoned pets. A seal locally known as Sammy the Seal may often be seen swimming up the river as far upstream as the Lagan Valley Island Centre.

References

External links

Nature & Wildlife
The Lagan Navigation Trust

* ttps://www.iwai.ie/lagan/ The Lagan Navigation at Inland Waterways of Ireland site*Lagan Gateway www.belfast.gov.uk/Lagan {{authority control Lagan Lagan Geography of Belfast

History

The Lagan in Belfast

Laganside Corporation

Lagan Weir

Sport

Dredging

The Lagan in Lisburn

The Lagan Navigation

Angling

Wildlife

See also

References

Further reading

External links