Rainwater Harvesting Potential

 

The total amount of water that is received in the form of rainfall over an area is called the rainwater endowment of that area. Out of this, the amount that can be effectively harvested is called the water harvesting potential. Among the several factors that influence the rainwater harvesting potential of a site, climatic conditions especially rainfall and the catchment characteristics are considered to be the most important.

 

Rainfall

Quantity
Rainfall is the most unpredictable variable in the calculation and hence, to determine the potential rainwater supply for a given catchment, reliable rainfall data are required, preferably for a period of at least 10 years. Also, it would be far better to use rainfall data from the nearest station with comparable conditions.
Pattern
Catchment Area Characteristics
Run-off
Run-off Coefficient
Runoff Coefficients for Various Catchment Surfaces
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