Rainwater harvesting is a simple system to collect, convey and store rainwater for directly used for irrigation purposes.
Two types of Rainwater harvesting are:
A. Surface runoff harvesting
B. Rooftop rainwater harvesting
Surface runoff harvesting – Surface runoff water harvesting is the collection, treatment or purification, and storing of stormwater for reuse. Surface runoff can be used for irrigation or recharging groundwater.
Rooftop rainwater harvesting - It is a system of catching rainwater where it falls. The rainwater is collected from the roof of a house/building. It can be stored in a tank and used later for irrigating kitchen gardens, etc.