**10.2 Artificial method**

This is efficient method in comparison with natural method, the amount of water consumed per capita is decreasing day by day and to increase the ground water recharge we need artificial method. This artificial methods involves various techniques (**Figure 7**).

#### *10.2.1 Basins or percolation tank*

A percolation tank is a anthropogenic method which consist of highly permeable land in its reservoir, which allows the excess runoff water to percolate and it will increase the storage of ground water. The percolation tank should be constructed using second to third order steams, particularly on extensively fractured and worn rocks with lateral continuity downstream; and the recharge area downstream should contain enough wells and cultivable land to benefit from the increased ground water. The percolation capacity in the tank bed determines the tank's size. Percolation tanks are designed in a way to store 0.1 to 0.5 MCM capacities. There is also a column of 3 and 4.5 cm provided for ponded water.

The objective of percolation tank is ground water recharge; it allows leakage under bed's seat. The majority of percolation tanks are earthen dams, with masonry structures serving only as spillways. For dams up to 4.5 m in height, keying and benching

**Figure 6.** *Methods recharge.*

*An Overview on Techniques Involved in Recharging Ground Water and Its Impacts DOI: http://dx.doi.org/10.5772/intechopen.105448*

**Figure 7.** *Artificial recharge.*
