and residential constructions been implemented at least some edge would have been taken off this present water scarcity but the numbers do give an idea of the immense potential of rainwater harvesting in delhi there is arrangement to take the overflow from this tank to a discharge well which takes the excess water down to the groundwater table says singhal those few who have installed a rainwater harvesting system in their homes vouch for its effectiveness for a longterm solution there is a need to quickly finish various projects like the renuka kishau and lakhwar vyasi dams and the canals linking them to delhi i have a 3800 litres capacity tank under the driveway connected to the roof through pipes in a city where the search for water especially this blistering summer has become an almost lifeanddeath struggle for thousands of families this bounty from the skies almost seems unbelievable