Uses of water mainly include household, agriculture, industrial and environmental activities. found as ground water and some in frozen glaciers and polar ice caps. The ground water extraction taking place was well established in the physical accounts. As ground water is a replenish able resource that needs to be consumed at the sustainable levels, it is imperative to avoid its excessive use this encyclopaedia fulfills the long felt necessity of a text dealing with concepts of this subject. it can also prove to be a worthy companion and guide for the students, users and researchers.