Rainwater potential from your house roof
Roof area in sq. m. - A
Annual Rainfall of the place in mm - R
Potential of Rainwater that can be Harvested
= Area X Rainfall = A X R = …… liter
or
Roof
area in sq. ft. - a
Annual Rainfall of the place in inches - r
Potential of Rainwater that can be Harvested
= Area X Rainfall = a X r X 2.36 = ….. liter
Example - For a house in Bangalore:
Roof area in sq. m. - 100
Annual Rainfall of the place in mm (Annual rain fall in mm for Bangalore) - 1000
Potential of Rainwater that can be Harvested
= Area X Rainfall = 100 X 1000 = 1,00,000 liter
or
Roof area in sq. ft. - 500
Annual Rainfall of the place in inches (Annual rain fall in inches for Bangalore) - 40
Potential of Rainwater that can be HarvestedAnnual Rainfall of the place in mm (Annual rain fall in mm for Bangalore) - 1000
Potential of Rainwater that can be Harvested
= Area X Rainfall = 100 X 1000 = 1,00,000 liter
or
Roof area in sq. ft. - 500
Annual Rainfall of the place in inches (Annual rain fall in inches for Bangalore) - 40
= Area X Rainfall = 500 X 40 X 2.36 = 47,200 liter