What are dams? How do these help to conserve and manage water ? -SST 10th

What are dams? How do these help to conserve and manage water ? -SST 10th
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Answer :

A dam is a barrier across flowing water that obstructs, directs or retards the flow often creating a reservoir, lake or impoundment. (i) Dams were traditionally built to impound rivers and rainwater that could be used later to irrigate agricultural fields. (ii) Dams are also source of perennial canals.
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