- Swansea Bay barrage
The Swansea Bay barrage (or the River Tawe barrage) was completed in
1992becoming the UK's first tidal barrageacross a river. This created a new marinaat the mouth of the River Taweextending the leisure boat facilities already being offered by the old South Dock.
The barrage structure includes a boat lock,
spillway, fish passand generator turbine. The turbine serves a dual use: acting as a power generator for the national gridas well as being used to pump water back into the Tawe river system.
The barrage scheme gave rise to a number of environmental concerns. Fish navigation up the river and dissolved oxygen levels were problems that arose after completion. As a result of the reduced oxygen the
Environmental Advice Centrewas commissioned to undertake an aerationscheme trial in the River Tawe in the summer of 1998. The system was based on a diffuser design and propeller mixer, which proved highly effective at exporting the saltwater from the deep area of the trial site and raising dissolved oxygen concentrations at the bed.
Following the success of the trial system a more extensive system was designed for the river for installation in 1999 -2000. The first stage of the installation of the designed system was undertaken in June 1999 and comprised a combination of diffusers and a large propeller mixer.
The installation was conducted using a diving team to ensure optimal location of the diffusers within the river channel. The installation will be completed over two years to treat all the problem areas over a 4km long reach of river and ameliorate the poor
water qualitypresented in these areas.
Monitoring results from the system installed to date have indicated that aeration has effectively raised the oxygen concentration and assisted in the export of
saline waterfrom the system. Following the success of this work the Environmental Advice Centre is currently examining designs for other reaches of tidal riverwithin the United Kingdomthat display similar problems.
Following the success of the River Tawe aeration scheme the neighbouring Welsh city of
Cardiffused the same method to improve the quality of the water in its newly-created bay.
Other fears that arose with the building of the barrage such as the raising of the
water tablecausing ground subsidenceproblems in the low-lying areas around the River Tawe. Since completion, no significant subsidence problems have arisen.
* [http://www.explore-gower.co.uk/Content/pa=showpage/pid=62.html The Tawe River and Swansea Harbour]
Wikimedia Foundation. 2010.
Look at other dictionaries:
Swansea Marina — is a marina located behind the Swansea Bay barrage at the mouth of the River Tawe in Swansea, south Wales. Swansea Marina was awarded blue flag status in June 2005 [http://wales.gov.uk/news/archivepress/environmentpress/enviropress2005/707946/?lan… … Wikipedia
List of buildings and structures in Swansea — This is a list of buildings and structures in the City and County of Swansea.Buildings*BT Tower *Civic Centre *DVLA Computer Centre *Guildhall (Grade I listed) *Kilvey Hill TV transmitter *Marina Tower *Mumbles Lighthouse (Grade II listed)… … Wikipedia
Severn Barrage — The Severn Barrage is the name of a number 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 (and Bristol Channel) have existed since the… … Wikipedia
SA1 Swansea Waterfront — The Technium Centre Bellway Homes s Altamar apartment block overlooking … Wikipedia
Maritime Quarter — Former South Dock The Maritime Quarter, or Swansea Marina, is a residential area of Swansea, Wales, UK located immediately south of the city centre shopping core. It falls within Swansea s Castle ward. The area is bounded by Brynmill to the west … Wikipedia
River Tawe — The River Tawe ( Afon Tawe in Welsh) is a river in south Wales. It flows in a principally south westerly direction for some 48 km (28 miles) from its source below Moel Feity in the old red sandstone hills of the western Brecon Beacons to the… … Wikipedia
National Cycle Route 43 — National Cycle Network, Route 43 is part of the National Cycle Network and the Celtic Trail, which connects Swansea with Builth Wells. Most of the route is still awaiting development. As of June 2006, there is a 13 mile section out of Swansea… … Wikipedia
List of dams and reservoirs in the United Kingdom — Contents 1 England 1.1 Bedfordshire 1.2 Buckinghamshire 1.3 … Wikipedia
List of reservoirs and dams in the United Kingdom — This is a list of reservoirs and dams in the United Kingdom.EnglandBedfordshireBuckinghamshire*Foxcote Reservoir, north of Buckingham *Weston Turville Reservoir, between Weston Turville and WendoverCambridgeshire*Grafham WaterCheshire*Bosley… … Wikipedia
Newport — This article is about the city of Newport in Wales. For the city in Rhode Island, see Newport, Rhode Island. For other uses, see Newport (disambiguation). City of Newport Dinas Casnewydd Principal area City … Wikipedia