ECONOMICS
SCARCITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Only 1
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Only 2
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Both 1 & 2
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None
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Detailed explanation-1: -Dams can also provide a lake for recreational activities such as swimming, boating, and fishing. 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.
Detailed explanation-2: -It is used for reducing the velocity of flow in the channel. It can counteract erosion.
Detailed explanation-3: -It must be strong, as floods will wash over its crest. Over time, sand accumulates in layers behind the dam, which helps store water and, most importantly, prevent evaporation. The stored water can be extracted with a well, through the dam body, or by means of a drain pipe.
Detailed explanation-4: -Flood control dams store all or a portion of the flood waters in the reservoir, particularly during peak floods, and then release the water slowly. Typically, the principal use of such dams is to store a portion of the flood volume, in order to delay and attenuate flood peaks downstream.