Percolation tank
Percolation tanks are the most
common runoff harvesting techniques, in which a series of dams are made
for the storage of a suitable quantity of surface water that may percolate to
recharge GW. The area for establishment of such structure should be such that a
significant quantity of water infiltrates through the bed towards the
groundwater table. This method is effective in alluvial soils with higher
permeability and hard rock area with many faults. It is useful for
uninterrupted recharge even after the receding of the monsoon. The size of tank
depends upon the percolation capacity of strata.