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Lea Valley
The Lea Valley, the valley of the River Lea, has been used as a transport corridor, a source of sand and gravel, an industrial area, a water supply for London, and a recreational area. The London 2012 Summer Olympics were based in Stratford, in the Lower Lea Valley. It is important for London's water supply, as the source of the water transported by the New River aqueduct, but also as the location for the Lee Valley Reservoir Chain, stretching from Enfield through Tottenham and Walthamstow. Geography Physical geography The catchment area of the River Lea is located in the central part of the London Basin, on that basin's northern flank. The main underlying geological formation of the upper part of the Lea catchment, north of Hoddesdon, is Cretaceous Chalk. The main underlying geological formation of the lower part of the Lea catchment, south of Hoddesdon, is Eocene London Clay. However, large areas of these formations are overlain by much more recent Quaternary formations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ramsar Convention
The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of Ramsar sites (wetlands). It is also known as the Convention on Wetlands. It is named after the city of Ramsar in Iran, where the convention was signed in 1971. Every three years, representatives of the contracting parties meet as the Conference of the Contracting Parties (COP), the policy-making organ of the convention which adopts decisions (resolutions and recommendations) to administer the work of the convention and improve the way in which the parties are able to implement its objectives. COP12 was held in Punta del Este, Uruguay, in 2015. COP13 was held in Dubai, United Arab Emirates, in October 2018. List of wetlands of international importance The list of wetlands of international importance included 2,331 Ramsar sites in May 2018 covering over . The countries with most sites are the United Kingdo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Clay
The London Clay Formation is a marine geological formation of Ypresian (early Eocene Epoch, c. 56–49 million years ago) age which crops out in the southeast of England. The London Clay is well known for its fossil content. The fossils from the lower Eocene rocks indicate a moderately warm climate, the tropical or subtropical flora. Though sea levels changed during the deposition of the clay, the habitat was generally a lush forest – perhaps like in Indonesia or East Africa today – bordering a warm, shallow ocean. The London Clay is a stiff bluish clay which becomes brown when weathered and oxidized. Nodular lumps of pyrite are frequently found in the clay layers. Pyrite was produced by microbial activity (sulfate reducing bacteria) during clay sedimentation. Once clay is exposed to atmospheric oxygen, framboidal pyrite with a great specific surface is rapidly oxidized. Pyrite oxidation produces insoluble brown iron oxyhydroxide (FeOOH) and sulfuric acid leading to the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epping, Essex
Epping is a market town and civil parish in the Epping Forest district of the County of Essex, England. The town is northeast from the centre of London, is surrounded by the northern end of Epping Forest, and on a ridge of land between the River Roding and River Lea valleys. Epping is the terminus for London Underground's Central line. The town has a number of historic Grade I and II and Grade III listed buildings. The weekly market, which dates to 1253, is held each Monday. In 2001 the parish had a population of 11,047 which increased to 11,461 at the 2011 Census. Epping became twinned with the German town of Eppingen in north-west Baden-Württemberg in 1981. History "Epinga", a small community of a few scattered farms and a chapel on the edge of the forest, is mentioned in the ''Domesday Book'' of 1086. However, the settlement referred to is known today as Epping Upland. It is not known for certain when the present-day Epping was first settled. By the mid-12th century a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southgate, London
Southgate is a suburban area of North London, England in the London Borough of Enfield. It is located around north of Charing Cross. The name is derived from being the south gate to Enfield Chase. History Southgate was originally the ''South Gate'' of Enfield Chase, the King's hunting grounds. This is reflected in the street names Chase Road (which leads due north from the station to Oakwood, and was formerly the avenue into the Chase) and Chase Side. There is a blue plaque on a building on the site of the south gate. A little further to the south was another small medieval settlement called South Street which had grown up around a village green; by 1829 the two settlements had merged and the village green became today's Southgate Green. Southgate was predominantly developed in the 1930s: largish semi-detached houses were built on the hilly former estates (Walker, Osidge, Monkfrith, etc.) following increased transport development. In 1933, the North Circular Road was compl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northaw
Northaw is a village in the Welwyn Hatfield district of Hertfordshire, England. It is part of the civil parish of Northaw and Cuffley (where at the 2011 Census the population was included), which was originally known as Northaw. The parish had a population of 5,190 according to the 2001 census, most of whom live in Cuffley. It formed part of the Metropolitan Police District until 2000. The village has a population of around 590 people. Northaw Church of England Primary School was founded in 1879 and the trust deed, which is the school's Christian foundation, remains integral to the ethos and beliefs of the school community. The school is a Voluntary Aided School and is part of the family of the Diocese of St Albans. The parish church of Thomas à Becket is Grade II listed. Built in 1881, by C. Kirk and Son of Sleaford, replacing church of 1809. The north aisle was added in 1887, with choir and vestry added in 1893. The church has complete and original stained glass. The east w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edmonton, London
Edmonton is a town in north London, England within the London Borough of Enfield, a local government district of Greater London. The northern part of the town is known as Lower Edmonton or Edmonton Green, and the southern part as Upper Edmonton. Situated north-northeast of Charing Cross, it borders Enfield to the north, Chingford to the east, and Tottenham to the south, with Palmers Green and Winchmore Hill to the west. The population of Edmonton was 82,472 as of 2011. The town forms part of the ceremonial county of Greater London and until 1965 was in the ancient county of Middlesex. Historically a parish in the Edmonton Hundred of Middlesex, Edmonton became an urban district in 1894, and a municipal borough in 1937. Local government took place at the now-demolished Edmonton Town Hall in Fore Street between 1855 and 1965. In 1965, following reform of local government in London, the municipal borough and former parish of Edmonton was abolished, merging with that of Enfiel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hertford
Hertford ( ) is the county town of Hertfordshire, England, and is also a civil parish in the East Hertfordshire district of the county. The parish had a population of 26,783 at the 2011 census. The town grew around a ford on the River Lea, near its confluences with the rivers Mimram, Beane, and Rib. The Lea is navigable from the Thames up to Hertford. Fortified settlements were established on each side of the ford at Hertford in 913AD. The county of Hertfordshire was established at a similar time, being named after and administered from Hertford. Hertford Castle was built shortly after the Norman Conquest in 1066 and remained a royal residence until the early seventeenth century. Hertfordshire County Council and East Hertfordshire District Council both have their main offices in the town and are major local employers, as is McMullen's Brewery, which has been based in the town since 1827. The town is also popular with commuters, being only north of central London and connect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lea Valley Topographic Map
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 settlement in the civil parish of Dethick, Lea and Holloway * Lea, Devon, a location * Lea, Herefordshire, a village and civil parish * Lea, Lancashire, a village * Lea, Lincolnshire, a small village and civil parish * Lea, Lydham, a location in Shropshire * Lea, Pontesbury, a location in Shropshire * Lea, Wiltshire, a village * River Lea, a tributary of the Thames Spain * Lea, a river in Biscay, Basque Country United States * Lea County, New Mexico People * Lea (given name) * Lea (surname) * Lea (musician), a German singer-songwriter and keyboardist * Lea baronets, a title in the baronetage of the United Kingdom * Lea Salonga, a Filipina singer, actress, and columnist Arts and entertainment * Liberian Entertainment Awards (LEA), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Greater London to the south and south-west. There are three cities in Essex: Southend, Colchester and Chelmsford, in order of population. For the purposes of government statistics, Essex is placed in the East of England region. There are four definitions of the extent of Essex, the widest being the ancient county. Next, the largest is the former postal county, followed by the ceremonial county, with the smallest being the administrative county—the area administered by the County Council, which excludes the two unitary authorities of Thurrock and Southend-on-Sea. The ceremonial county occupies the eastern part of what was, during the Early Middle Ages, the Anglo-Saxon Kingdom of Essex. As well as rural areas and urban areas, it forms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middlesex
Middlesex (; abbreviation: Middx) is a Historic counties of England, historic county in South East England, southeast England. Its area is almost entirely within the wider urbanised area of London and mostly within the Ceremonial counties of England, ceremonial county of Greater London, with small sections in neighbouring ceremonial counties. Three rivers provide most of the county's boundaries; the River Thames, Thames in the south, the River Lea, Lea to the east and the River Colne, Hertfordshire, Colne to the west. A line of hills forms the northern boundary with Hertfordshire. Middlesex county's name derives from its origin as the Middle Saxons, Middle Saxon Province of the Anglo-Saxon England, Anglo-Saxon Kingdom of Essex, with the county of Middlesex subsequently formed from part of that territory in either the ninth or tenth century, and remaining an administrative unit until 1965. The county is the List of counties of England by area in 1831, second smallest, after Ru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 government statistical purposes, it forms part of the East of England region. Hertfordshire covers . It derives its name – via the name of the county town of Hertford – from a hart (stag) and a ford, as represented on the county's coat of arms and on the flag. Hertfordshire County Council is based in Hertford, once the main market town and the current county town. The largest settlement is Watford. Since 1903 Letchworth has served as the prototype garden city; Stevenage became the first town to expand under post-war Britain's New Towns Act of 1946. In 2013 Hertfordshire had a population of about 1,140,700, with Hemel Hempstead, Stevenage, Watford and St Albans (the county's only ''city'') each having between 50,000 and 100,000 r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alluvium
Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluvium is also sometimes called alluvial deposit. Alluvium is typically geologically young and is not consolidated into solid rock. Sediments deposited underwater, in seas, estuaries, lakes, or ponds, are not described as alluvium. Floodplain alluvium can be highly fertile, and supported some of the earliest human civilizations. Definitions The present consensus is that "alluvium" refers to loose sediments of all types deposited by running water in floodplains or in alluvial fans or related landforms. However, the meaning of the term has varied considerably since it was first defined in the French dictionary of Antoine Furetière, posthumously published in 1690. Drawing upon concepts from Roman law, Furetière defined ''alluvion'' (the F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
