ROOF TOP RAIN WATER HARVESTING - EPCO

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Recharge tank/ filtration chamber/ recharge trench Water holding capacity of recharge tank/ filtration chamber/ recharge trench is less then its gross volume because it is filled with porous material. factor for void ratio has to be applied in the calculation Following data required for the capacity: - Area of roof top - A Peak rainfall in 15 min - Pr Runoff coefficient - C Void ratio - D Required capacity Q === A x Pr x C x D Length of recharge trench = Q / bxd (Where b is width and d is depth of trench)
Precautions The roof or terraces used for harvesting should be clean Do not store chemicals, rusting iron, manure or detergent on the roof Avoid using terraces for toilet by you and your pets Provide gratings at mouth of each drainpipe on terraces to trap debris and floating materials Prevent storage system from contamination Provision of first rain separator should be made to flush first rain Do not use polluted water to recharge ground water Before recharging arrangements of filtering should be provided
Page 1 and 2: ROOF TOP RAIN WATER HARVESTING Mano
Page 3 and 4: What is Rainwater Harvesting Colle
Page 5 and 6: Components of RTRWH system The syst
Page 7 and 8: Commonly used Terms Catchment The
Page 9 and 10: Filteration Sand gravel filter Ch
Page 11 and 12: Charcoal filter 10 CM. GRAVEL LAYER
Page 13 and 14: Sponge filter It is a simple filte
Page 15 and 16: Recharging ground water aquifers G
Page 17 and 18: Recharge pits RCC slab with manhole
Page 19 and 20: Runoff Runoff Filter bed Perforated
Page 21 and 22: Percolation tanks Percolation tanks
Page 23: Settlement tank The capacity of the

ROOF TOP RAIN WATER HARVESTING - EPCO

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