Template for GIAHS proposal: Grand Anicut(Kallanai)and associated farming system in Cauvery Delta Zone of Tamil Nadu
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The Cauvery River rises from southwestern Karnataka and f ows down into the Bay of Bengal with 55%of the drainage area falling in state of Tamil Nadu and 42% in the state of Karnataka. During monsoon it gets flooded, inundating large areas. Anicut are the diversion dam constructed with masterly engineering skill of the local people and the rulers of the day to control the flow of water saving region from the devastation of the furies of the floods and using it effectively and efficiently in irri gation as per demand of the situation. It has been constructed on the course of river, when it enters the delta region and where Cauvery bifurcates into Cauvery and its tributary Coleroon. It was constructed to restrict water spilling into Coleroon, and to raise the water level to gain command for its flow through delta.