What is rain water harvesting..
We get rains in seasons only and the need of water is more. Todays fast phase of dev many of the ponds and water reservoirs are not sufficient enough.
This is a concept when the rain comes in the season this water is taken into the earth and harvested. by doing this we iprove the ground water level.
In a Multistorey building or in a house, when the drainage of the roof taken thro a PVC/Cement conduit pipe and let out .
Justs below this depends upon the space available pit is formed which will filled up with old bricks and sands. which will take the water deep into the earth..