Authors : Mahendra R. Gaikwad and Gautam Gupta
Page Nos : 152-159
Description :
Electrical resistivity is one of the most effective geophysical methods for investigating the presence of groundwater. In a hard rock terrain like the Kolhapur, Ratnagiri and adjoining regions in the Deccan Volcanic Province of Maharashtra, the nature and extent of weathering may vary significantly, depending mostly on the presence of fractures and lineaments at depth and the geomorphological features at the surface. Hence, electrical resistivity studies are vital in a hard rock terrain for identification and analysis of concealed lineaments and fractures zones. An attempt is made here to understand the tectonic framework of over Devrukh-Ganapatipule region and Malkapur-Sakarpa-Ratnagiri region and its relation to the movement of groundwater. A total of 43 vertical electrical soundings were conducted in Devrukh-Ganapatipule and Malkapur-Sakarpa-Ratnagiri region. The profile over the Malkapur-Ratnagiri area was divided into two profiles. It is observed from the two dimensional geoelectric cross-section that this region has more potential groundwater aquifers than the previous profile. The resistivity ranges are also less than the Devrukh-Ganapatipule profile. A couple of lineaments were also identified over this profile.
Keywords: Deccan volcanic province, electrical resistivity, geoelectrical sections, groundwater potential zones.
