Natural groundwater recharge

In natural recharge, rainwater enters the soil through voids through natural processes. About 15–20% of seasonal rainfall contributes to groundwater recharge in the region with higher permeability, while that falls to about 5–10% in the hard-rock regions. Sandy or permeable soil, rocky strata with fractures, perennial rivers and streams, forest land, paddy field, wetlands, and leveled lands are the most suitable natural condition for GW recharge. Application of additional irrigation @ 50 mm in each time over and above the normal irrigation is easily moved to the downstream and recharges the groundwater.