Rainwater harvesting is the process of accumulating and storing rainwater before it reaches aquifers by capturing it from catchment surfaces like rooftops. Rooftop rainwater harvesting involves collecting rainwater from rooftops and storing it in reservoirs to meet household needs, while surface runoff harvesting collects rainwater from surfaces on the ground.

3. WHAT IS
RAINWATER
HARVESTING???
• RAINWATER HARVESTING IS THE
ACCUMULATING AND STORING OF WATER
FOR REUSE BEFORE IT REACHES THE
AQUIFER.
• THE PRINCIPLE OF COLLECTING AND USING
PRECIPITATION FROM A CATCHMENT
SURFACE.

9. RAINWATER HARVESTING
TECHNIQUES

10. ROOFTOP RAIN
HARVESTING
Rooftop rainwater harvesting is the technique
through which rainwater is captured from
the roof catchments and stored in reservoirs.
Harvested rainwater can be stored in sub-
surface groundwater reservoir by adopting
artificial recharge techniques to meet the
household needs through storage in tanks.

13. Surface runoff harvesting