1, Suresh. M.1, Vinoth. M.1, Senthil Kumar. M.1 and K. Dharanirajan2
Abstract : The study aims at preparing the geomorphology and Top soil resistivity maps with spatial distribution elements through Geographic information technology for groundwater zones. ERDAS image processing and Arc GIS software is used for studying groundwater possible zone demarcation. The work was done in parts of Manimuktha sub basin, central Tamil Nadu, India. Seventy five vertical electrical sounding (VES) surveys were carried out in the study area. The field data were interpreted by curve matching technique in RESIST software. The software is used to determine the top soil resistivity and thickness. These results were taken into GIS environment to prepare the top soil resistivity spatial distribution map and Geomorphology map (satellite data source). The geomorphological map was prepared from IRS P6 L4 MX satellite data using vectorisation processes in ERDAS. Then these maps were overlaid one over the other. A total of 56 various combinations were derived for hydrogeomorphological map, presenting the spatial distributions of individual elements. Finally it is concluded that the best zone is located in buried pediments shallow with <10 Ohm.m combinations is groundwater possible zone.
Key words: Remote sensing, geomorphology, GIS (Geographical Information System), Spatial distribution map.