Mapping of seawater inundation along Nagapattinam based on field observations |
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| Authors: | M V Ramana Murthy N T Reddy Y Pari Tune Usha P Mishra |
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| Institution: | (1) ICMAM-Project Directorate, Ministry of Earth Sciences, NIOT Campus, Velachery-Tambaram Main Road, Pallikaranai, Chennai, Tamil Nadu, 600100, India; |
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| Abstract: | Nagapattinam, in the east coast of India, was severely affected during the deadliest Indian Ocean tsunami of December 26,
2004. The tsunami caused heavy damage to life and property, and the death toll was about 3,378 in Nagapattinam taluk. Certain
villages along the coast witnessed large inundation while adjacent villages were protected from the fury of the tsunami waves.
This study was carried out to examine the underlying causes for the vulnerability along Nagapattinam coast with the help of
field observations, remote sensing, and geographical information system as tools. Coastal areas with high sand dunes have
been protected from tsunami, and areas adjacent to backwaters were inundated. Realtime Kinematic Global Positioning System
and high-resolution satellite data were used to map the topographic information and maximum extent of inundation. Thematic
maps on land use, land cover, and coastal geomorphology were generated using remote sensing and field data. Using field data
as the primary source of information, tsunami hazard maps have been generated for Nagapattinam. |
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