ASSESSMENT OF GROUNDWATER POTENTIAL ZONES IN ERODE DISTRICT, TAMIL NADU, BY USING GIS TECHNIQUESR. Kavidha and K. ElangovanAbstract Water scarcity in Erode district motivated us to explore the groundwater potential zones in it. Erode in Tamil Nadu state has an aerial extent of about 8161.91 km2. The thematic maps of geology, geomorphology, soil hydrological groups, land use/cover as well as drainage were prepared for the district. The digital elevation model (DEM) has been generated at 10 m interval contour lines obtained from SOI, Toposheet 1:25000 scale. The slope (%) of the study area was also obtained. The prospective ground water potential zones were obtained by overlaying all the thematic maps in terms of weighted overlay methods by employing the spatial analysis tool in Arc GIS 9.1. During the weighted overlay analysis, ranking has been assigned for each individual parameter of each thematic map according to their influence. Potential zones were found out in terms of very high, high, moderate, low and very lowr ones.
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