**Abstract**

The movement of water from the surface of the earth into the sub surface areas are said to be as a hydrologic process which helps in improving the water table at the ground level. This process of water movement towards downward direction is said to be as Groundwater recharge or deep drainage or deep percolation. Ground water recharge could be achieved either by natural method or by artificial methods which involves anthropogenic processes. The ground water recharge has a superior impact while in consideration of various complexities such as climate, land surface and biosphere processes, and characteristics in the unsaturated and saturated subsurface. So in this chapter, we would like to briefly explain about the techniques involved in recharging the ground water table and also about the methods involved in estimating the ground water available along with the importance of agriculture globally along with the policies incorporated to maintain the ecological demand and also about the impacts caused to the environment due to the insufficient water at the ground water table.

**Keywords:** techniques, impacts, methods, benefits, trends and policies
