About rivers http://www.kerenvis.nic.in/isbeid/river_kerala1/river27.htm Chalakudy Basin area, km2 : 1704 Basin area in Kerala State, km2 : 1404 Basin area in neighbouring State, km2 : 300 ( Tamil Nadu ) District of Kerala in which basin are : Trissur, Palakkad, Eranakulam located Origin of River : Anamalai Elevation. m : 1250 Length of main stream, km : 130 Parambikulam, Kuriarkutty, Sholayar, Main tributaries : Karappara, Anakayam Average annual rainfall, mm : 3600 Average annual streamflow, Mm3 : 1629.3 1.Mattathur (1) 2.Chalakkudy (2) Important rainguage stations marked on the : 3.Thumburmuzhi (3) map (with code numbers) 4.Sholayar Dam (4) 5.Karappara E. (5) 1.Chalakudy (1) Important discharge stations marked on the : 2.Karappara (2) map (with code numbers) 3.Kuriarkutty (3) Water requirement for wetland for three : 1030 crops, Mm3 Water requirement for gardenland , Mm3 : 63 Water requirement for domestic use (2021 : 97.6 AD), Mm3 Water requirement for industrial use (2021 : 90 AD), Mm3 Existing major/medium irrigationproject : Chalakudy (commissioned) Existing Hydroelectric project : Poringalkuthu L.B., Sholayar 1 of 2 12/28/2011 3:54 PM About rivers http://www.kerenvis.nic.in/isbeid/river_kerala1/river27.htm Navigable length of river, km : 16 Enlarged View (Note: It is the 4th longest river in Kerala. Chalakudy River is the one of very few rivers of Kerala, which is having relics of riparian vegetation in substantial level. The annual report of the National Bureau of Fish Genetic Resources Lucknow, mentioned that the Chalakudy River is the richest river in fish diversity perhaps in India. The riparian forests of the Chalakudy River have revealed the existence of a thick riparian vegetation of more than 10 metres width for a distance of 10.5 km downstream from Peringalkuth, covering an area of 58.5 hectares. Out of this, 26.4 hectares lie within the Vazachal area, including three large islands densely covered by riparian forests. The riparian forests of the area have been found to be characterised by the presence of typical riparian species of plants, in addition to evergreen and semi-evergreen species. Out of the 319 species of flowering plants identified from the study area, 24 are endemic species of the Western Ghats and 10 are rare and endangered. Moreover, the Chalakudy River is known for its diversity, as it contains 85 species of fresh water fishes out of the 152 species known from Kerala. Among these, 35 are endemic species of the Western Ghats and nine are considered to be endangered. The famous waterfalls, Athirappilly Falls and Vazhachal Falls, are situated on this river. For irrigation purposes Thumboormoozhy Dam is constructed across this river. It merges with the Periyar River near Puthanvelikkara, adjacent to Manjali, North Paravur in Ernakulam District. The Parambikulam Dam has been built on the Parambikulam River, one of its four tributaries. ) 2 of 2 12/28/2011 3:54 PM.