How does rainwater harvesting structures...

How does rainwater harvesting structures recharge ground water?

Text Solution

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The main purpose of rainwater harvesting is to make the rainwater percolate under the ground so as to recharge 'groundwater level'. Methods of rainwater harvesting :
(i) Roof top rain water harvesting : Roof tops are excellent rain catchers. The rain water that falls on the roof of the houses, apartments, commercial buildings etc. is collected and stored in the surface tank and can be used for domestic purpose.
(ii) Recharge pit : The rain water is first collected from the roof tops or open spaces and is directed into the percolation pits through pipes for filtration.
(iii) After filtration the rainwater enters the recharge pit or ground wells.

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Assertion: Rainwater harvesting is to collect and store rain water. Reason: Rainwater can be directed to recharge the underground water source.

Both assertion and reason are true and reason is correct explanation of assertion.

Both assertion and reason are true but reason is not the correct explanation of assertion.

Assertion is true but reason is false.

Both assertion and reason are false.

Assertion: Rainwater harvesting is to collect and store rain water. Reason: Rain water can be directed to recharge the underground water source.