Geophysical Studies for Configuring the Bedrock Profile along Jhiri Dam Alignment, Par-Tapi-Narmada Link Project, Nasik District, Maharashtra

摘要

The paper presents the results of geophysical surveys conducted along the Jhiri dam alignment in district Nasik, Maharashtra at the request of the Par-Tapi-Narmada Link Project of National Water Development Agency (NWDA). National Water Development Agency (NWDA) is the first Water Resources Management Scheme involving interbasin transfer of Par, Nar, Tan, Ambika, Khapri and Purna rivers through Tapi (Ukai reservoir) and Narmada (Sardar Sarovar reservoir) to Kutch region in the state of Gujarat. Under this programme, geophysical surveys employing seismic, electrical resistivity and magnetic techniques were conducted for the delineation of bedrock configuration and the geological structural features, if any, present in the vicinity of the dam alignment. The Jhiri dam site is located across river Par near village Jhiri which is situated about 3 km west of village Jhiri in Nasik district. The depth to the bedrock at dam site varies between 2.9 m and 20 m showing P-wave velocity ranging between 5000 to 5100 m/s.