How to estimate the rainwater harvesting potential of a residential building?
Rainwater harvesting potential of a particular catchment area is the amount of rainwater that can be effectively harvested from the said catchment area.
To calculate the rainwater harvesting potential, the following data is required:
- Surface area of catchment in sq. ft.
- Runoff Co-efficient of catchment surface.
- Amount of water received in rainfall in mm.
(Amount of rainfall can be found out from local authorities website or any other local news sources)
Formula to calculate rainwater harvesting potential:
Rainwater Harvesting Potential = Surface Area of catchment (sq. ft.) x Runoff Co-Efficient of Catchment Surface x Amount of Rainfall (mm)
The following calculator can also be used to estimate the rainwater harvesting potential: