Integrated analysis of Geophysical Data of Ponnaiyar river basin using Arcview GIS Software

A model of aquifer geometry of Ponnaiyar River basin is simulated with in agreeable degree of accuracy. The Vertical Electrical Sounding (VES) together lithologs forms the data base in the determination of depth, thickness and spatial distribution of overburden, weathered rock, fractured rock and bed rock and the corresponding themes are shown as surface plot, Contours, 3D plot and cross section with the effluent use of GIS packages Arc View. There exist close correspondence between the pattern of drainage and the aquifer dimension. Along the rivers and parts of the foothills region, deep weathered and/or fracturing is noticed. Themes of topsoil, weathered rock, deep weathered rock and fractured rock are integrated digitally in order to obtain the places where thickness of all the three are more, thus suitable for artificial recharge (RWS). The results generated from this research will be of great help in various numerical solutions and GIS analysis pertaining to this basin. The technique of resistivity method proved to be successful where the data analyzed ingroup for specific area reveled satisfactory results in characterizing the aquifer geometry, although the utility of this technique for locating water well sites in hard rock areas cost doubt in certain cases.