<Table> <Tr> <Td> </Td> <Td> It has been suggested that this article be merged into Reservoir . (Discuss) Proposed since January 2016 . </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> It has been suggested that this article be merged into Reservoir . (Discuss) Proposed since January 2016 . </Td> </Tr> <P> 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 . </P> <Table> <Tr> <Td> </Td> <Td> This section may require copy editing . (May 2017) (Learn how and when to remove this template message) </Td> </Tr> </Table>

Where are tanks most widely used in india why
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