An earthen dam built across a small channel to put a brake on the flow of water during rain. This allows water to seep down and collect underground which technique is this ?
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Rain water harvesting/Bunds
is the name of this technique
when flowing rain water is stopped using some means ,the water begins to collect in some region
this water starts percolating through the soil and as a result the groundwater level increases in that region .this way water is used judiciously and is prevented by getting wasted
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