This study deals with Geoelectrical resistivity surveys to delineate fresh water pockets in a sedimentary aquifers of Vanur block of Villupuram District, Tamilnadu. The study area geologically comprises of alluvium, sand stone, clay and shell limestone formations. Vertical Electrical Soundings (VES) were conducted at nine different locations using Schlumberger configuration with maximum current electrodes spread up to 100m. The measured resistivity data were interpreted using IPI2WIN software. The resistivity result shows the first minimum and maximum value is 13.5 to 1515?m similarly second layer resistivity value is 4.5 to 181Om, Third layer value is 4.9 to 181Om and finally fourth layer resistivity values 4.9 to 818.1Om respectively. In the thicknesses of first layer is 0.3 to 1.5m, second layer thickness is 2.1 to 31.4m and third layer is 17.1 to 39.5m respectively. The favorable resistivity value 50to 150Om was observed in three VES locations like 1,6 and 9. In these three VES locations suitable resistivity and thickness identified in second layer values is 1,6 and 9are 132 Om,73.9 Om,137Om and 11 m,28 m,16.7m respectively. Hence, these three locations were identified to develop shallow fresh water potential pockets from the interpretation analysis.
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