According to the World Lake Vision (2003) it is estimated that lakes, both natural and manmade, store more than 90 percent of the world's surface fresh-water resources. They are heavily used for a variety of human activities, including drinking, fishing, irrigation, navigation, and recreation. As a result of this increased usage, lakes are increasingly threatened by abstractions for agriculture, pollution from discharges, and sedimentation from poor...
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详细
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2003/03/01
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工作文件（编号系列）
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26326
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1
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1
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2010/07/01
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Disclosed
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Lake management
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review of water