Which of the following is not one of the purposes served by percolation tanks?
Percolation tanks are artificial reservoirs which are constructed across stream, submerging a land area with adequate permeability to facilitate sufficient percolation to collect surface water run-off and allow it to percolate within the permeable land. This is one of the effective methods of refilling groundwater table (also known as groundwater recharge).
The land collects water from rainwater and the stored water is used for irrigation as well.