TN Narsimhan

Groundwater has been used for domestic and irrigation needs from time immemorial. It is a component of the hydrological cycle, vital for human sustenance. Unlike surface water, groundwater cannot be readily observed. Consequently, it was long considered to be mysterious or even occult in nature, influencing legal decisions relating to groundwater ownership and use.

The global groundwater crisis centers on withdrawals notably exceeding short term renewable storage. The current global groundwater crisis reflects the fact that over the past century, groundwater withdrawal has grown to exceed natural renewable groundwater storage. The single most important cause is the deep well turbine pump. Groundwater depletion is very high in both the United States and India.