Authors: Tune Usha M V Ramana Murthy N T Reddy Pravakar Mishra
Publish Date: 2011/09/06
Volume: 60, Issue: 1, Pages: 135-147
Abstract
Natural disasters can neither be predicted nor prevented Urban areas with a high population density coupled with the construction of manmade structures are subjected to greater levels of risk to life and property in the event of natural hazards One of the major and densely populated urban areas in the east coast of India is the city of Chennai Madras which was severely affected by the 2004 Tsunami and mitigation efforts were severely dampened due to the nonavailability of data on the vulnerability on the Chennai coast to tsunami hazard Chennai is prone to coastal hazards and hence has hazard maps on its earthquake prone areas cyclone prone areas and flood prone areas but no information on areas vulnerable to tsunamis Hence mapping has to be done of the areas where the tsunami of December 2004 had directly hit and flooded the coastal areas in Chennai in order to develop tsunami vulnerability map for coastal Chennai The objective of this study is to develop a GISbased tsunami vulnerability map for Chennai by using a numerical model of tsunami propagation together with documented observations and field measurements of the evidence left behind by the tsunami in December 2004 Worldrenowned and the secondlongest tourist beach in the world “Marina” present in this region witnessed maximum death toll due to its flat topography resulting in an inundation of about 300 m landward with high flow velocity of the order of 2 m/s
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