Rainwater harvesting is the storage of rain. It is one of the simplest and oldest processes used to conserve rainwater by storing, collecting and purifying rainwater that runoff from rooftop, local catchment area and open ground for later use.
Methods of rainwater harvesting:
- To capture the runoff from catchments, runoff from the rooftop, the seasonal flood- water of the surface stream.
- To conserve the water through better utilization of modern irrigation systems like drip irrigation and sprinklers.
Purpose:
- To provide sufficient water for drinking purposes, sufficient water for irrigation purposes sufficient water for ground water recharging process
- To reduce the danger of over flow of surface runoff causing flood.
Need of rain water harvesting:
Rainfall is the first form of water we received from the hydro logical cycle.
The rainfall is the primary source of water.
The rainfall supplies water to the surface in the form of lakes and ponds to the surface runoff in the form of stream and rivers and to ground in the form of water table.
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