Dams · Floods

Overview of CWC Flood Forecasting Sites 2018: SOUTH INDIA

Central Water Commission is the only agency doing flood forecasting in India. As per CWC’s Flood Forecasting website[i] the Data Flow Map has information about 226 Flood Forecast Sites in the country comprising of 166 Level Forecast Sites and 60 Inflow Forecast Sites. It also monitors 700 Flood sites, information made available through List Based Exploration and Hydrograph View, but no flood forecasting is done for these sites.

In order to better understand the CWC’s flood monitoring and forecasting work, in this article, we have given an overview of CWC’s flood forecasting and monitoring sites in South India. It includes state wise list of CWC’s Level Forecast, Inflow Forecast and level monitoring sites in South India. Similar report has been published for North India[ii] and North East India[iii] and East India[iv]. 

Tamil Nadu There are 3 Level Forecasting, 48 Level Monitoring and 14 Inflow Forecasting sites in Tamil Nadu State. Out of total 65 sites, 19 Level Monitoring and 2 Inflow Forecasting sites are inactive. MWL information is given only for 1 Inflow Forecasting site out of 14. IRRUKKANKUDI, Sathanur and Gomukhi sites are repeated with incomplete information. Out of 48, HFL figure and date is not provided for 25 Level Monitoring sites.

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Karnataka Rivers Profile

Karnataka is one of the four southern states of Peninsular India (Figure 1a), came into existence with the passage of the States Reorganisation Act (1956, Nov 1) and is located 11°30′ North and 18°30′ North latitudes and 74° East and 78°30′ East longitude (https://en.wikipedia.org/wiki/Geography_of_Karnataka). The state covers an area of 191,976 km² (5.83% of India‘s geographical area). Karnataka is the eighth largest Indian  state by area, the ninth largest by population and comprises 30 districts (figure 1b) divided in to 4 administrative divisions, 270 towns and 29406 villages (http://ssakarnataka.gov.in/). The state is situated on a table land where the Western and Eastern Ghats ranges converge into the complex, in the western part of the Deccan Peninsular region of India. Karnataka is bordered by the Arabian Sea to the west, Goa to the northwest, Maharashtra to the north, Andhra Pradesh to the east, Tamilnadu to the southeast, and Kerala to the southwest.

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