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Rooftop Rain Water Harvesting is the technique through which rainwater is captured from the roof catchments and stored in surface / sub surface reservoirs. Harvested rainwater can be stored in sub-surface ground water reservoir by adopting artificial recharge techniques to meet the household needs through storage in tanks. Main Objective of rooftop rainwater harvesting is to make water available for future use. In Nagpur city we can collect and store 80 m3 (or 80, 000 litres) water / annum from 100 m2 roof area.
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