STANDING on the Hoover Dam and looking upstream at Lake Mead, America's largest reservoir, the visitor notices a wide, white band ringing the cliffs.

游客们站在胡佛水坝上朝上游的米德湖(美国最大的人造水库)望去会发现一条白色的宽条纹围绕着四周的岩壁。

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Over the years the lake began growing over and on its site developed gigantic marshy ground, a self-sustained reservoir which can feed itself just with rainfalls.

多年以来，湖泊开始越来越多，并在其基础上侵占着巨大沼泽地面，自我维持的水库，单凭着降雨就足以维系。

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Furthermore, it's now "a major component of acid rain" and is "found in almost every stream, lake, and reservoir in America."

此外它现在已经是“酸雨的重要组成物”，“美国的每一条河流、湖泊和水库中都含有这种物质”。

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Water is supplied locally from a reservoir near Holywell Lake.

BBC: Wellington water towers go up for auction

An initiative to assess erosion and sediment transport to marine, lake or reservoir environments aimed at the creation of a holistic approach for the remediation and conservation of surface waters, closely linking science with policy and management needs.

UNESCO: International Hydrological Programme (IHP)

Sitting on his bass boat on the lagoon portion of Castaic Lake, a reservoir in a desert some 45 minutes north of L.A., Crupi bakes under a merciless southern California sun from 6 a.m. until 5 p.m.

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