Question

method of rainwater conservation

Answer 1

rainwater consevation by water harvesting system.

Answer 2

There are two main methods of rainwater harvesting:

(I) Storage of rainwater on the surface for future use

In this method, traditional water harvesting structures like artificial lakes, ponds etc. are used as such or after proper revival.

(II) Recharge of ground water

The structures used for recharge of ground water are:

(a) Hand Pumps:

The water should pass through a filter bed before percolation in existing hand pumps. They are used for recharging aquifiers.

(b) Pits:

They are (1-2) m wide and 3 m deep. They are also back filled with gravels and coarse sand to aid filtration before percolation to the ground. They are used for recharging a shallow aquifer.

(c) Dug wells:

The rain water, after filtration, is put into existing dug wells for storage.

(d) Rooftop and road rop collection of rainwater:

In urban areas, these methods are very useful to recharge aquifers.


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