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Question

Which of the following can change the pattern of the flow of a river, both reducing its overall volume and changing its seasonal variations?

A
Canals
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B
Wells
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C
Dams
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D
Channels
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Solution

The correct option is B Dams
A dam is a barrier across flowing water that obstructs, directs and retards the flow often creating a reservoir, lake, and impoundment.
Dams are built for irrigation, electricity generation, water supply for domestic and industrial uses, flood control, recreation, inland navigation, etc.

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