water harvesting

1. Rain water harvesting

2. Definition of rain water harvesting
•Rain water harvesting is a
technique of collection and
storage of rainwater into
into natural reserviors or
tank.

3. METHODS
There are two types
1.Surface runoff harvesting
2.Roof top rain water harvesting

4. SURFACE RUNOFF HARVESTING
In urban area rain water flow away as surface
runoff. This runoff could be cut and can be
used for rharching