This slide show depicts how rainwater harvesting has been accommodated in policy and legislation in India and specifically in the state of Karnataka. It gives example of projects in rural areas and in the city of Bangalore.
7. An above the ground rainwater 2000 litre rainwater storage tank
8. Quality check- using the H2S vial test for e.coli identification Put sample water in bottle and observe for 36 hours Brown colour indicates no e-coli, black water would indicate e-coli
9. Simple treatment for e-coli in rainwater using SODIS Keep water in a bottle for 5 hours in the sun www.sodis.ch
14. A rain barrel is the simplest way to harvest rainwater
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17. Rainfall pattern in Bangalore Maximum rainfall intensity 90 mm/hour 30 years data 970.00 59.8 TOTAL 137.00 10.0 AUG 194.80 9.3 SEP 180.40 9.0 OCT 110.20 8.3 JUL 64.50 4.0 NOV 80.80 6.4 JUN 22.10 1.7 DEC 119.60 7.0 MAY 46.30 3.0 APR 4.40 0.4 MAR 7.20 0.5 FEB 2.70 0.2 JAN QUANTITY (mm) DAYS MONTH
22. Site identification FOR RECHARGE with rainwater The site should have a sufficient clean and large catchment. It should also permit fast infiltration and percolation.
27. The pit has reach the silt layer Pit and concrete rings Placing of the rings The making of a recharge well – to put rooftop rainwater or stormwater into the aquifer. In Bangalore city, typically 6 metres deep and 1 metre diameter
28. Recharge wells details Silt and leaves trap in a storm-water drain Covers : steel grill or perforated RCC
29. Rainwater going inside a recharge well Re-charging a bore well Outlet pipe in recharge well