Question

what are the two techniques of rooftop rainwater harvesting​

Answer 1

Answer:

here it is

Explanation:

In rooftop harvesting, the roof becomes the catchments, and the rainwater is collected from the roof of the house/building. It can either be stored in a tank or diverted to artificial recharge system.

Answer 2

excess of water collected through rainfall may be taken to wells

collection of rain water from the roof top through pipe into an underground structure