GIS INTEGRATION OF REMOTE SENSING DATA AND SEVERAL GEOPHYSICAL DATA FOR HYDRO-GEOLOGICAL EXPLORATION

Analysis of hydro-geological data often involves incorporating information from many sites each with a unique geographical location. Interpretation of these data requires that the spatial location be incorporated into the analysis. Geographic Information System (GIS) can be used efficiently for this purpose where hydro-geological data having different spatial identity can be analyzed independently using different logical approaches. In this project GIS is used for the analysis of hydro-geological data acquired from remote sensing (mainly Landsat MSS Data) and surface geophysical techniques for the assessment of economically high water system development of a hard rock terrain in Bankura District, West Bengal, India. United States Remote Sensing Satellite, Landsat MSS data is used for the generation of thematic map of geology. Geophysical survey is conducted using Vertical electrical sounding (VES) at several locations in the study area. The data is interpreted using evolutionary programming technique based on global optimization. Aquifer resistivity and thickness interpreted from VES data is used to generate the corresponding thematic maps. Weights are assigned to different ranges of resistivity and thickness values based on their position on geological map. Finally the weighted maps are integrated using a GIS based aggregation method to model the hydro-geological i.e. economically high water system condition of the area which will be helpful for the society to get natural water in right manner.