A __________ tank allows water to seep into the soil and recharge groundwater.

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Solution

A percolation tank is an artificially built tank in which collected rainwater is stored, so that the water can percolate in the ground and reach the water table.
It is a part of rain-water harvesting system, where rain water is directly collected from rooftops of buildings.
Once the water from percolation tank reaches the groundwater, water table is raised.
Therefore, a percolation tank allows water to seep into the soil and recharge groundwater.

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