Vembanad is the longest lake in India, and the largest lake in the state of Kerala. It is also counted as one of the largest lakes in India. Spanning several districts in the state of Kerala, it is known as vembanadu Lake in Kottayam Punnamada Lake in Kuttanad, Kochi Lake in Kochi. Several groups of small islands including Vypin, Mulavukad, Vallarpadam, Willingdon Island are located in the Kochi Lake portion. Kochi Port is built around the Willingdon Island, and the Vallarpadam island.The Nehru Trophy Boat Race is conducted in a portion of the lake. High levels of pollution have been noticed at certain hotspots of the Vembanad backwaters. Government of India has identified the Vembanad wetland under National Wetlands Conservation Programme.Vembanad Wetland is hosting many of migratory birds in the season. In addition to this the fragile ecosystem carries more than 100 birds as native. In comes in the way o Central Asian flyway. Tourism in this area is affecting the ecosystem and hence the life of 16 million people depending it.