Lakes and Reservoirs of Wales

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Lakes and Reservoirs of Wales Card set 1 Lake Vyrnwy Llyn Brianne Surface area 4.54 × 106 m2 Surface area 518 acres Water Volume 1.31 × 1010 Water Volume 64 billion litres gallons Use Water supply/ Use Water supply hydroelectricity Location Powys Location Carmarthenshire Llyn Clywedog Llyn Trawsfynydd Surface area 2.49 km2 Surface area 4.8 × 106 m2 Water Volume 4.99 × 107 m3 Water Volume 7.3 × 109 Use Water supply gallons Location Powys Use Nuclear and hydroelectricity Location Gwynedd Claerwen Reservoir Llyn Cefni Surface area 6.64 × 102 acres Surface area 0.86 km2 Water Volume 1.06 × 1010 Water Volume 400 million gallons gallons Use Water supply Use Water supply Location Powys Location Anglesey Llyn Alaw (Lily Lake) Cronfa Ddŵr Llanisien (Llanishen Reservoir) Surface area 3.6 km2 Surface area 23.8 ha Water Volume 1.64 × 109 Water Volume 1 440 909 m3 gallons Use Water supply/ Use Water supply leisure Location Anglesey Location Cardiff 1 Llyn Celyn Ystradfellte Surface area 330 ha Surface area 0.81 km2 Water Volume 8.09 × 107 m3 Water Volume 180 000 m3 Use Water supply Use Water supply Location Gwynedd Location Powys Llyn Brenig Nant y MoCh Surface area 3 723 000 m2 Surface area 525 acres Water Volume 6.15 × 107 m3 Water Volume 3.3 × 107 m3 Use Flow regulation Use Hydroelectricity Location Conwy/ Location Ceredigion Denbighshire Caban Coch Llandegfedd Surface area 2.02 km2 Surface area 434 acres Water Volume 7.8 billion Water Volume 5.4 × 109 gallons gallons Use Water supply Use Water supply Location Powys Location Monmouthshire PontstiCill Reservoir Alwen Reservoir Surface area 1.412 × 106 m2 Surface area 1 490 000 m2 Water Volume 1.6 × 1010 Water Volume 3.2 billion litres gallons Use Water supply Use Water supply Location Powys Location Conwy Usk Reservoir Talybont Reservoir Surface area 1.16 × 102 ha Surface area 3.18 × 102 acres Water Volume 2.70 × 109 Water Volume 1.17 × 1010 gallons litres Use Water supply Use Water supply Location Carmarthenshire Location Powys 2 Lakes and Reservoirs of Wales You will probably need the following information about conversions between units of measure: 1 m3 = 219.97 Imperial Gallons 1 Acre = 4,046.86 m2 1 hectare = 10,000 m2 1 km2 = 1,000,000 m2 3 .

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