Adiperukku is atamil festival celebrated on the 18th day of the Tamil month ofadi. This is the important festival of Cauvery Delta People. They contribute their prayer to the Mother Cauvery. Because water is the important to agriculture and evening in all part e in Tamil nadu. So, only they create a GHATSin the Cauvery river in all the place like Srirangam, Grand Anicut, Thiruvaiyaru, Kumbakoam, Mailaduthurai and Poombukar. Visit and watch the visual clips and videos The river Cauvery rises in the mountains of Goorg, on the west coast, and, taking a wide-ranging South-westerly direction, it falls into the sea in the distirict of Thanjavur, on the east coast, following a course of about 400 miles Grand Anicut (Kallanai) is perhaps the oldest dam in the world, constructed by the Chola King KarikalanGrand Anicut dam on river Kaveri (1st-2nd Century CE) is one of the oldest water-regulation structures in the world still in use The dam is still in excellent repair, and supplied a model to later engineers