Question: where are tanks most widely used in india why

title: Irrigation tank
text: An irrigation tank or tank is an artificial reservoir of any size . They are mainly found in India . ( The word sagar refers to a large lake , usually man - made ) . It can also have a natural or man - made spring included as part of a structure . Tanks are part of an ancient tradition of harvesting and preserving the local rainfall and water from streams and rivers for later use , primarily for agriculture and drinking water , but also for sacred bathing and ritual . Often a tank was constructed across a slope so to collect and store water by taking advantage of local mounds and depressions . Tank use is especially critical in parts of South India without perennial rainfall where water supply replenishment is dependent on a cycle of dry seasons alternating with monsoon seasons . 

Answer: answer: Tanks are part of an ancient tradition of harvesting and preserving the local rainfall and water from streams and rivers for later use , primarily for agriculture and drinking water.
Tank use is especially critical in parts of South India without perennial rainfall where water supply replenishment is dependent on a cycle of dry seasons alternating with monsoon seasons .