Hydro-Climate Symposium

Oral

393219 - LONG-TERM METEOROLOGICAL DROUGHT CHARACTERISTICS IN SOUTHERN INDIA

Wednesday, June 6
2:00 PM - 3:30 PM
Location: Lake Superior B
Co-Authors: Rajendra Pandey, Roorkee, India – National Institute of Hydrology; Surendra Mishra, Roorkee, India – Indian Institute of Technology Roorkee; Shailendra Kumre, Roorkee, India – Indian Institute of Technology Roorkee

Drought is a natural calamity occurring due to less than average rain falling over a given time duration at a given space, and consequently, leads to short-term water deficit and economic loss. Using the percent departures of annual and seasonal rainfalls from their respective mean values, this study analyses the drought for frequency, severity, and its duration of occurrence during 1901 to 2013 in 93 districts of peninsular India covering Andhra Pradesh, Telangana, Tamil Nadu, Karnataka, and Kerala. The analysis revealed that the average drought frequency in the region varied from once in 5 to 9 years, except in Kerala and coastal areas of Karnataka where the return period is greater than 10 years. Only 3 districts (Chamrajanagar, Erode and Coimbatore) experienced droughts with average return period of 4 years. The maximum rainfall deficiency in region was 69%, which is rare, of average annual rainfall for Chitradurga district. It was 30-45% in the coastal region. Notably, this region hardly experienced severe droughts. Thus, the extreme droughts are very rare occurrence in southern India. However, numerous persistent droughts of 2 and 3 consecutive years were experienced in the region.

Kumar Amrit, M. Tech

Research Scholar
Indian Institute of Technology Roorkee

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