Barrage (tidal)
Encyclopedia
A barrage is an artificial obstruction at the mouth of a tidal watercourse
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Secondary functions may include:
See also Category:Barrages
Estuary
An estuary is a partly enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the open sea....
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Purpose
The common primary functions of a barrage are:- Increase the depth of a river (similar to a weirWeirA weir is a small overflow dam used to alter the flow characteristics of a river or stream. In most cases weirs take the form of a barrier across the river that causes water to pool behind the structure , but allows water to flow over the top...
) - Maintain a separation between fresh and salt water
- Reduce the risk of tidal flooding up the river
Secondary functions may include:
- Tidal power generationHydroelectricityHydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy...
- Artificial whitewaterArtificial whitewaterAn artificial whitewater course is a site for whitewater canoeing, whitewater kayaking, whitewater racing, whitewater rafting, playboating and slalom canoeing with artificially generated rapids.-Flow diversion:...
leisure centres
Notable barrages
- Cardiff Bay BarrageCardiff Bay BarrageThe Cardiff Bay Barrage lies across the mouth of Cardiff Bay, Wales between Queen Alexandra Dock and Penarth Head. It was one of the largest civil engineering projects in Europe during construction in the 1990s.-History:...
- Chashma Barrage
- Delta BarrageDelta BarrageThe Delta Barrage is barrage that was completed in 1862. Its purpose was to improve irrigation in the Nile Delta area of Egypt.It was recorded by historians that Muhammad Ali of Egypt's grandson Abbas sacrificed one of the pyramids in order to build the dam which was very poorly financed.When it...
- Goolwa BarragesGoolwa BarragesThe Goolwa Barrages comprise five barrage structures in the channels linking Lake Alexandrina to the mouth of the River Murray and the Coorong in Australia...
- Marina BarrageMarina BarrageThe Marina Barrage is a dam in Singapore built across the mouth of the bay, between Marina East and Marina South. It was officially opened on 1 November 2008[1]...
- Prakasham BarragePrakasham barrageThe impressive structure of the Prakasam Barrage stretches 1223.5 meter long across the Krishna River connecting Krishna and Guntur districts. The barrage serves also as a road bridge and spans over a panoramic lake...
- Rance tidal power plantRance tidal power plantThe Rance Tidal Power Station is the world's first tidal power station and also the world's second biggest tidal power station. The facility is located on the estuary of the Rance River, in Brittany, France. Opened on the 26th November 1966, it is currently operated by Électricité de France, and is...
- Swansea barrageSwansea barrageThe Swansea barrage was completed in 1992 creating a new marina at the mouth of the River Tawe extending the leisure boat facilities already being offered by the old South Dock....
- Tees BarrageTees BarrageThe Tees Barrage is a barrage across the River Tees just upriver of Blue House Point in the borough of Stockton-on-Tees in North East of England and is used to control the flow of the river, preventing flooding and the effects of tidal change....
- West Sea Barrage
See also Category:Barrages
Proposed barrages
- Severn BarrageSevern BarrageThe Severn Barrage refers to a range of ideas for building a barrage from the English coast to the Welsh coast over the Severn tidal estuary. Ideas for damming or barraging the Severn estuary have existed since the 19th century. The building of such a barrage would be a huge engineering feat,...
across the River SevernRiver SevernThe River Severn is the longest river in Great Britain, at about , but the second longest on the British Isles, behind the River Shannon. It rises at an altitude of on Plynlimon, Ceredigion near Llanidloes, Powys, in the Cambrian Mountains of mid Wales...
between WalesWalesWales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...
and EnglandEnglandEngland is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...