Assessment of Aquifer Vulnerability of Nizamabad District, Telangana State, India Using GIS and Drastic Method

The precipitation falling on the surface earth, either it runoff over land to the stream or some part of it infiltrates into the ground. The part which moves into the ground either get transplanted by the plants and goes back to the atmosphere or some part of it percolated deep down and contributes water already inside the earth. The water which is existing below the ground surface is commonly called as ground water or subsurface water. Countries like India, most of the people use groundwater for drinking purpose. Due to increase of waste on earth surface which can effect groundwater quality. It can leads to contamination of groundwater. The present study is conducted to assess the groundwater vulnerability and prepare vulnerability map for Nizamabad district, Telangana state using DRASTIC model in ARC GIS 10.4.1 groundwater vulnerability map can be obtained by overlaying seven layers. Such as Depth of water level, Net Recharge, Aquifer Media, Soil Permeability, Topography, Impact of Vadose Zone and Hydraulic conductivity.