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“The total amount of water harvested depends upon the roof catchment area and the average annual rainfall in that region.

For example: For 100 SQM catchment area with average annual rainfall of 2000 mm has the following calculation:

Total Amount of Water Harvested = Area of Catchment x Average Annual Rainfall x Coefficient of Transportation x Coefficient of Filtration

Total Amount of Rainwater Harvested = 100 x 2000 x 0.90 x 0.85

= 1, 53,000 Ltrs per Year.”

Category: Rainwater Harvesting

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