OBJECTIVE LIFE SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Rain water harvesting is necessary because of
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Decrease in surface and ground water level
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Decrease in water level in dams
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Heavy rain
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Floods
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Explanation:
Detailed explanation-1: -Another vital benefit is that it increases the productivity of aquifer resulting in the rise of groundwater levels and reduces the need for potable water. It is extremely essential, particularly in areas with low water levels.
Detailed explanation-2: -In alluvial areas where permeable rocks are exposed on the land surface or are located at very shallow depth, rain water harvesting can be done through recharge pits. The technique is suitable for buildings having a roof area of 100 sq. m. These are constructed for recharging the shallow aquifers.
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