Simulation and Modeling of Seawater Intrusion Around Pondicherry Coastal Aquifer-India

Abstract

Characteristic nature of groundwater along the Pondicherry beachfront area is under worry because of overexploitation. The examination models the excess concentration of EC levels to assess the impacts on the coastal region. Field data included in the model are electrical conductivity, water table, depth, pump test, elevation/ topography of the area, annual precipitation, aquifer thickness, their porosity, permeability, specific storage and specific yield, the lithological cross-section of exploratory/ observatory bore wells, etc. The visual MODFLOW modeller (MT3DMS) is employed to predict the concentration of EC μS/cm for the actual pumping rate and at an annual recharge of 40% together with the DL (longitudinal dispersion) value of 10 m to characterize changing salt-cloud. The model encompasses the highest coefficient of correlation of more top than 94% for the initial twenty years, and so reduced to 85% for the subsequent twenty years. The model results with saltwater intrusion (~14 km) along the SW Pondicherry coast.