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Grafham Water () is a reservoir with a circumference of about . It is located between the villages of Grafham and Perry in the English county of Cambridgeshire (Huntingdonshire District). Grafham Water is the eighth largest reservoir in England by volume and the third largest by area at 1,550 acres (6.28 km²). The lake was created by filling a valley full of water which is retained by an earth and concrete dam built by W. & C. French in 1965〔(【引用サイトリンク】title=Buckden: A Huntingdonshire Village )〕 and is extracted and processed at an adjacent Anglian Water treatment plant before being piped away as drinking water. The water level can be controlled constantly via the pumps which pump water from the River Great Ouse nearby. There are two pumping stations associated with the reservoir. One is located just behind the dam, the other at Offord Cluny alongside the River Great Ouse. At times of high potential flood risk, Grafham Water treatment works can increase the amount of water it takes up to maximum capacity to help reduce the risk of flooding along the river. The reservoir was immediately colonised by wildlife and a nature reserve surrounding the western side of the reservoir was soon created to help maintain and enhance the site's potential.〔(Wildlife Trust: Grafham Water )〕 The nature reserve contains semi-natural ancient (at least 400 years old) woodlands and more recent plantation woodlands, grasslands and wetland habitats such as reedbeds, willow and open water. As of January 2011, it was the only site in England, and the first in the UK, to harbour the invasive killer shrimp (Dikerogammarus villosus). Grafham Water is popular for a range of leisure activities including boating, fly fishing and cycling. ==See also== * List of reservoirs and dams in the United Kingdom 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Grafham Water」の詳細全文を読む スポンサード リンク
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