<P> The Kaveri basin is estimated to be 81,155 square kilometres (31,334 sq mi) with many tributaries including Harangi, Hemavati, Kabini, Bhavani, Arkavathy, Lakshmana Tirtha, Noyyal and Arkavati . The river's basin covers three states and a Union Territory as follows: Tamil Nadu, 43,856 square kilometres (16,933 sq mi); Karnataka, 34,273 square kilometres (13,233 sq mi); Kerala, 2,866 square kilometres (1,107 sq mi), and Puducherry, 160 square kilometres (62 sq mi). Rising in southwestern Karnataka, it flows southeast some 800 kilometres (500 mi) to enter the Bay of Bengal . In Mandya district it forms the island of Shivanasamudra, on either side of which are the scenic Shivanasamudra Falls that descend about 100 metres (330 ft). The river is the source for an extensive irrigation system and for hydroelectric power . The river has supported irrigated agriculture for centuries and served as the lifeblood of the ancient kingdoms and modern cities of South India . Access to the river's waters has pitted Indian states against each other for decades . </P> <P> After the river leaves the Kodagu hills and flows onto the Deccan plateau, it forms two islands in mandya district's Srirangapatna and Shivanasamudra . First, comes the Srirangapatna which forms the sangam and then comes Shivanasamudra . At Shivanasamudra the river drops 98 metres (320 ft), forming the famous Shivanasamudra Falls known separately as Gagana Chukki and Bhara Chukki . Asia's first hydroelectric plant (built in 1902) was on the left falls and supplied power to the city of Bangalore . </P> <P> In its course through Karnataka, the channel is interrupted by 12 "anekattu" (dams) for the purpose of irrigation . From the Anekattu at Madadkatte, an artificial channel is diverted at a distance of 116 kilometres (72 mi), irrigating an area of 4,000 hectares (10,000 acres), and ultimately bringing its water supply to the town of Mandya . </P> <P> Three kilometres away from Srirangapatna, the Kaveri is the basis for the Ranganthittu Bird Sanctuary . Near Srirangapatna is also an aqueduct, the Bangara Doddi Nala, which was constructed in the 17th century by the Wodeyar maharaja of Mysore, Ranadhira Kantirava, in memory of his favourite consort . It is said to be the only aqueduct where the water from a river, dammed upstream, is carried by the aqueduct over the very same river few miles downstream . This aqueduct also served as a motorable bridge until 1964. The kabini river tributary of Kaveri joins Kaveri at Tirumakudal Narasipura where triveni sangama takesplace along with mythological river Spatika . The Moyar River is an east flowing river originates in the Mudumalai, Bandipur, and Wayanad National Parks draining the Nilgiri Hills in Tamil Nadu and Karnataka and is one of the tributaries to the Kaveri River . </P>

The river cauvery originates from which of the following states