Dr. Subhash Chandra

Dr. Subash Chandra did B.Sc.(Hons.) in Geology, M.Sc.(Tech.) in Exploration Geophysics in 1997 and 2000 respectively from Banaras Hindu University, India. He joined CSIR-NGRI as Research Fellow in October 2000, worked on groundwater problems. He was appointed as Junior Scientist in January 2002 at CSIR-NGRI. He received his Ph.D award in 2006 from Banaras Hindu University on the topic of "contribution of geophysical properties in estimating hydrogeological parameters of an aquifer". Dr. Chandra received Boyscast postdoctoral fellowship from Department of Science and Technology, India and worked at Aarhus University, Denmark during 2010-11. His research interest deals with various aspects of geophysical applications in investigating the hydrogeological parameters. He also worked on Arsenic problem pertaining to Middle Ganga Plain, particularly to understand the role of lithological set up and its characteristics on Arsenic distribution and provide management scheme for safe pumping of groundwater resources.
Dr. Chandra has played a key role in establishing the pilot project on Aquifer Mapping (AQUIM) in collaboration with CGWB, MoWR and Aarhus University, Denmark. For the first time in India, a dual moment time-domain electromagnetic and magnetic heliborne survey were carried out and completed 13800 line km surveys successfully in six different geological setup located in Rajasthan, Maharashtra, Karnataka, Bihar and Tamilnadu. He led the team from front in managing, coordinating, data acquisition, processing and interpretation that has yielded successful result with high-resolution aquifer maps and established method for high-resolution aquifer mapping to be up scaled over entire India for developing aquifer based groundwater management.
Some of the key findings are: (i) CAPS configuration method in identifying lateral near surface inhomogeneities affecting VES apparent resistivity curves; (ii) Surface geoelectrical method in estimating hydraulic conductivity and transmissivity in granitic hard rock aquifers; (iii) Lithologically constrained rainfall (LCR) method to estimate spatial and temporal natural recharge distribution; (iv) Buried Bipole Pole (BBP) method to assess the direction of deep tunnel; (v) Nonlinear LSQ exhaustive grid search inversion method to estimate exponents of multiple parameters under joint correlation; (vi) Data integration and constrained interpolation for estimating spatio-temporal distribution of natural recharge in hard rock; (vii) lithological control of arsenic contamination in MGP; (viii) mapping of network of fractured pathways in hardrock, palaeo channel, aquifer disposition, fresh-saline interface in coastal aquifers, Deccan basaltic flows and associated structural setup, etc.

Page Last Updated On : 25-11-2019