Appraisal of Groundwater Vulnerability Pollution Mapping Using GIS Based GOD Index in Tiruchendur, Thoothukudi District, India

Recently, groundwater resources have become the main freshwater supply for human activities worldwide, especially in semi-arid regions, and pollution from anthropological events is one of chief environmental problems built-up industrial coastal areas. Many researchers around world conducted studies to evaluate impact management. For this study, GIS based GOD vulnerability models were used assess intrinsic risk irrigated areas Tiruchendur Taluk, Thoothukudi district Tamil Nadu. Here, stands G—Groundwater hydraulic confinement, O—Overlying aquifer strata, D—Depth groundwater. The parameters G, O, D show that 70% study area consists an unconfined whose central part often sandstone fine medium clay with sand along coast acts as aquifer. recorded value was 1–28 mbgl. map using method shows 32% vulnerabilities are located almost northern area, where source agricultural land activities. A total 39 samples collected different types aquifers validate map, EC concentration (230 15,480 µs/cm average 2758 µs/cm) NO3? (2 120 mg/L 46 mg/L) indicators pollution. Finally, we measured how represent zone model on pattern their concentrations Therefore, best among these predicting Taluk.