Natural Disasters in India with Special Reference to Tamil Nadu

6856 Words Jul 16th, 2012 28 Pages
J. Acad. Indus. Res. Vol. 1(2) July 2012

ISSN: 2278-5213


Natural disasters in India with special reference to Tamil Nadu
A. Stephen Dept. of Ecology, French Institute of Pondicherry, Puducherry-605001, India; +91 9841890069 ____________________________________________________________________________________________

Natural disasters in India, many of them related to the climate of India, cause massive losses of Indian life and property. Droughts, flash floods, cyclones, avalanches, landslides brought on by torrential rains and snowstorms pose the greatest threats. Landslides are common in the Lower Himalayas. Parts of the Western Ghats also suffer from low-intensity landslides.
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About 8% of the state is affected by five to six cyclones every year, of which two to three are severe. Cyclonic activities on the east coast are more severe than on the west coast, and occur mainly between April-May and October-November (Kuppusamy and Rajarathnam, 2009). Floods Floods are high stream flow that overflows the natural banks of the rivers and most of the times become calamitous. India is the most flood affected nation after Bangladesh. Out of total deaths by Floods in the world, (1/5) are from India. The main causes of floods are excessive rains in river catchments, poor natural drainage, Change of river course, Landslide restricting river flow, cyclone and very intense rainfall (Fig. 1). Over that past few years the rise in population is forcing large settlements along the river banks, making the country

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Stephen, 2012

J. Acad. Indus. Res. Vol. 1(2) July 2012

60 policies and measures for various preventions and disaster management activities are properly implemented. From the flood hazard map of India (Fig. 1), it is seen that no area in Tamil Nadu falls in the risk zone. But within a local body area, particularly with reference to an area’s proximity to a major drainage system like rivers, canals, and also water bodies like lakes, and further with reference to contour levels/low-lying areas, flood prone area mapping has to be done. Tamil Nadu is also subjected to annual flooding,

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