who were not involved in tank building
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An irrigation tank or tank is an artificial reservoir of any size. They are mainly found in India.[1] 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.[2] Tank irrigation is practised by constructing mud banks across small streams to make a small reservoir which collect excess water during the rainy season.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.
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