Groundwater recharge methods include 'check dams' which work by:
Choose the correct answer
Pumping water into the ground
Retaining surface runoff to allow increased infiltration time and area for groundwater recharge
Filtering groundwater chemically
Reducing evapotranspiration from crops
Correct Answer
B. Retaining surface runoff to allow increased infiltration time and area for groundwater recharge
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Check dams: small masonry/concrete weirs across streams that slow down flow, spread water over a wider area, and allow more time for infiltration into the aquifer. Increase soil moisture and groundwater table. Used in: arid/semi-arid India (Gujarat, Rajasthan, Maharashtra). Percolation ponds, recharge wells, and spreading basins are other recharge methods.
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