A GIS-based approach to assess groundwater quality in Kurnool district

摘要

Water is essential for the survival of mankind on the surface of the Earth. The surface water bodies which act as a source of drinking water are prone to pollution in the current days. As a result people rely on groundwater sources for drinking, irrigation etc., It has become a necessity to evaluate the quality of groundwater as it is being polluted to a large extent because of rapid urbanization and industrialization. The present study aims to assess the quality of groundwater in Kurnool district. The samples are collected at various well locations and are studied for physico-chemical parameters H~+ ion concentration, bi-carbonate, carbonates, sulphates, and chloride concentration. Thematic maps for each physico-chemical parameter are prepared by Inverse distance weightage interpolation method in Geographical Information system. The groundwater quality is assessed using a water quality index, which expresses overall quality at a location. Based on the results potential zones are identified by query builder in ArcGIS. Thus it can be concluded that the potential zones act as sources of drinking water.