Johads are small earthen check dams that capture and conserve rainwater, improving percolation and groundwater recharge. They are spread across more than 650 villages in Alwar district, Rajasthan.
Khadin is an ingenious construction designed to harvest surface runoff water for agriculture. Its main feature is a very long (100-300 m) earthen embankment built across the lower hill slopes lying below gravelly uplands. Sluices and spillways allow excess water to drain off.
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NCERT Notes: Salinity Of Ocean Water [Geography Notes For UPSC] |
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