The river Kaveri rises in the Western Ghats, in the Kodagu district of Karnataka and flows through the fertile Mandya, Mysore, Hassan regions before entering Tamil Nadu, where it forms an extensive and fertile delta on the east coast. The three major river deltas of South India, the Kaveri, the Godavari and the Krishna, are located along the Bay of Bengal. These areas constitute the rice bowls of South India. Rivers that flow westward, from the mountains to the Arabian Sea, include the Periyar River, Netravati River, Mandovi and Tapti River (or Tapi) rivers, and the Narmada at the northern edge of the region.