Recharge trench cum Injection well

This technique is ideally suited for areas where permeable sandy horizons within 3 to 5 m. below ground level and continues up to the water level under unconfined conditions, by which copious water available can be easily recharged.

Artificial Recharge Through Injection Well

In this technique, 1 to 2 m. wide and 2 to 3 m. deep trench is excavated, the length of which depends on the site availability and volume of water to be handled. An injection well of 100 to 150 mm dia meter is constructed, piereing through the layers of impermeable horizons to the potential aquifer reaching about 3 to 5 metres below water levels ( t to 10 m.) from the bottom of the trenches. Depending upon the volume of water to be injected, the number of injection wells can be increased to enhance the recharging rate. A schematic diagram is enclosed which is self explanatory.