Why dams are built across perennial divers?
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Dams are built to provide water for human consumption, for irrigating arid and semiarid lands, or for use in industrial processes. ... Many dams are built for more than one purpose; for example, water in a single reservoir can be used for fishing, to generate hydroelectric power, and to support an irrigation system.
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Dam, structure built across a stream, a river, or an estuary to retain water. Dams are built to provide water for human consumption, for irrigating arid and semiarid lands, or for use in industrial processes. ... Dams can also provide a lake for recreational activities such as swimming, boating, and fishing.
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