Delineation of Groundwater Potential Zones using Remote Sensing and GIS Techniques: A Case Study of Sarada Gedda Sub Watershed

Abstract

In present days many researchers have delineated groundwater potential zones using Remote Sensing and GIS techniques by the Weighted Index Overlay Analysis (WIOA) for various geographic regions of the world. Many of the researchers have not been given weightage calcualtions for the thematic layers they considered in their research. But in this research, a detailed approach have been given for weightage calcultions for various thematic layers considered. In this research the following thematic layers have been taken which include Land use/Land cover, Geomorphology, Geology, Soil, Drainage density, Lineament density, Lineament frequency and Lineament Intersection. All the thematic layers have been extracted from the existing data, KOMPSAT and LANDSAT ETM+ satellite data. For the extraction of thematic layers and analysis ,the ArcGIS 9.3,1 and ERDAS Imagine 9.1 softwares have been used for delineating the groundwater potential zones. The delineated groundwater potential zones have been validated with the open wells in the study area.