Rain water harvesting need and advantages - Printable Version

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Rain water harvesting need and advantages - Niyati Gupta - 07-24-2014

RAIN WATER HARVESTING TO AUGMENT GROUND WATER RESOURCES

Rain water harvesting is the technique of collection and storage of rain water at surface or in sub-surface aquifers, before it is lost as surface run-off. The augmented resource can be harvested in the time of need. Artificial recharge to ground water is a process by which the ground water reservoir is augmented at rate exceeding that under natural conditions of replenishment.

NEED
? To overcome the inadequacy of waters to meet our demands.
? To arrest decline in ground water levels.
? To enhance availability of ground water at specific place and time and utilize rain water for sustainable development.
? To increase infiltration of rain water in the subsoil which has decreased drastically in urban areas due to paving of open area.
? To improve ground water quality by dilution.
? To increase agriculture production.
? To improve ecology of the area by increase in vegetation cover, etc.

ADVANTAGES
? Cost of recharge to sub-surface reservoir is lower than surface reservoirs.
? The aquifer serves as distribution system also.
? No land is wasted for storage purpose and no population displacement is involved.
? Ground water is not directly exposed to evaporation and pollution.
? Storing water underground is environment friendly.
? It increases the productivity of aquifer.
? It reduces flood hazards.
? Effects rise in ground water levels.
? Mitigates the effects of drought.
? Reduces soil erosion.

---MINISTRY OF WATER RESOURCES CENTRAL GROUND WATER BOARD FARIDABAD

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