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1. Dear Mr. Ajith, Greetings

Dear Mr. Ajith,
 
Greetings from KSCST and I appreciate your interest in innovative ideas for Rainwater Harvesting and water conservation. In fact the best filter for rainwater is a simple first flush valve and sand bed filter. Further for ground water recharge through pre cast cement ring wells in Bangalore do not require filter if the water is coming from roof tops. Rainwater from the down water pipes can be let in to the aggregate layer around the cement rings (not directly in to the well). Leaves and other debris remain on the surface and water reaches the well through gaps further down in the well.
 
With Best Regards,
 
A.R. Shivakumar
Principal Investigator - RWH
Karnataka State Council for Science and Technology
Indian Institute of Science
Bangalore

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