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The Rietvlei dam is an earth-fill type dam and is one of a number of dams supplying water to the Pretoria region of South Africa. It supplies around 41 million liters of drinking water daily,〔 about 5.9% of the water requirement of Pretoria.〔(【引用サイトリンク】title=State of the Environment Report for the City of Tshwane 2001-2002 )〕 The dam mainly serves for municipal and industrial use. Its hazard potential has been ranked high (3). Constructed as a brick dam wall in 1934, it was extended between 1988 and 1990 by raising the dam wall with the addition of a concrete wall on top of the original wall. The dam is fed by the Rietvlei, a river of the Crocodile River (Limpopo) basin, as well as by five fountains and five boreholes. The Rietvlei Nature Reserve occupies the area immediately surrounding the dam. == See also == * Rietvlei Nature Reserve 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「Rietvlei Dam」の詳細全文を読む スポンサード リンク
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