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Cauvery River Basin Summary Culture Climate   Rainfall   Humidity   Evapotranspiration Physical   Area   Elevation   Geology   Soil   Drainage Land Use   Rural   Urban   Agriculture   Forests & Ecosystems Water Use   Irrigation   Urban consumption   Industrial consumption Ground Water   Net draft   GW usage   GW exploitation   Available GW Water Quality   BOD   COD   Nitrate   pH   Coliform Waste Water   Effluent   Sewage Meteorological Data               Research                                  Policies & Laws                      River Basins                           Water Balance Demo          Maps & Statistics          Parliament Questions          Water Quality Kits          Conference Outputs          Kids' Section          Social Aspects & Conflicts More Physical Cauvery basin spans an area around 81155 km2 and runs from a northwest to south eastern direction along a general south easterly slope. Catchment area of this basin can be divided into three sections; upper catchment areas with steep slopes; middle catchment area mostly in Tamil Nadu and lower catchment area which is confined to the plains in Tamil Nadu.   Drainage: Source: Dept of Economics & Statistics (2003-04)   Around 81155 km2 area comes under the Cauvery basin, which is nearly 2.5% of the total geographical area of the country. The basin is located between 1007 N and 13 0 28 N and 75 0 28 E and 79 0 52 E. The catchment of the river basin lies in the states of Karnataka, Tamil Nadu, Kerala and Union Territory of Pondicherry. Of the total area of the basin, 41.2% falls in the state of Karnataka, 55.5% in the state of Tamil Nadu and 3.3 % in Kerala. The width of the basin ranges from 65 to 250 km. The total length of the river from its source to its outfall in Bay of Bengal is about 800 km of which 320 km is in Karnataka, 416 km in Tamil Nadu.   Cauvery river flows from NW to SE and drains about 81155 km2 of the southern peninsula. and the river has been dammed since 2nd Century AD at the Grand Anicut. The drainage network of the river is dense and the river forms a delta at Trichinopoly.   The table below gives the details of the tributaries of the river Cauvery.   Tributaries of Cauvery Tributary Name Catchment Area (Sq.km) Origin, Altitude,Length Sub-Tributaries State Arakavathy 4351 Nandidurga 1480 metres 161 km Kumaudavathy, Manihalla, Kuttehole, Vrishabhavathy Karnataka and Tamil Nadu Harangi 717 Pushpagiri Hills of Western Ghats. 1067 metres 50 km Karnataka Hemavathy 5410 Ballarayana Durga in Western Ghats 1219 metres 245 km Karnataka Kabini 7040 Western Ghats in Kerala 2140 metres 230 km Taraka, , Hebballa, Nugu, Gundal Karnataka, Kerala and Tamil Nadu Lakshmana Thirtha Western Ghats 1950 metres 131 km Ramathirtha Karnataka Shimsha 8469 Tumkur District 914 metres 221 km Veeravaishnavi, Kanihalla, Chickkhole, Habbahalla, Mullahalla, Kanva Karnataka Suvarnavathy 1787 Nasrur Ghat Range Length 88km Karnataka and Tamil Nadu Source: http://waterresources.kar.nic.in/river_systems.htm   Source: http://www.geol.lsu.edu/Faculty/Hart/INDIARPT/india.htm http://nwda.gov.in/writereaddata/sublink2images/239.pdf http://waterresources.kar.nic.in/river_systems.htm http://dst.gov.in/scientific-programme/ser-deep-south-indian.htm http://www.geol.lsu.edu/WDD/ASIAN/Cauvery/cauvery.htm CPCB, 1995: Comprehensive river basin report

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