A STUDY ON GROUNDWATER QUALITY IN TSUNAMI AFFECTED AREAS OF SIRKAZHI TALUK, NAGAPATTINAM DISTRICT, TAMILNADU, INDIAN. Ravisankar and S. PoongothaiAbstract Tsunami is Japanese word which represents larbour wave'. Tsunami consists of a series of very long waves generated by any rapid, large-scale disturbance of the sea. The 26, December 2004 - Tsunami had a major impact on groundwater quality along the south-east coast of India especially in the areas of Nagapatinam district in Tamilnadu. The impact of the Tsunami depended on the interaction of the Tsunami with the coastline, which in turn depended on many parameters like bathymetty, Tsunami surge height, ground slope, configuration of the coastline, structures at the coast etc,. Water quality in Tsunami affected areas of Sirkazhi taluk, Nagapattinam district particularly the areas of Pazaiyar, Madavaimedu, Thirumullaivasal, Thoduvai, Koozaivar, Puthupattinam, Kizhamoovarkarai, Poombhukar and Vanagiri is posing problems to general health, agricultural and environmental degradation. The present study aims to determine the source, degree, extent and nature of the groundwater pollution in Sirkazhi coastal region due to Tsunami. Groundwater samples from 11 wells have been collected from the study area for hydro-chemical analysis. Various graphs have been prepared to identify the polluted areas. It is observed that the major pollution is due to salinity, Na, and Cl. The water quality problems in the coastal areas of Sirkazhi region are mainly associated with historic influence of Tsunami into the groundwater. The present study aims to understand the impact of Tsunami incursion on the adjacent groundwater quality. The results show significant variations in water quality parameters in the study area.
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