The Authors are indepthly acknowledged Prof. S. Govindaiah, Chairman; DoS in Earth Science, University of
Mysore, Mysore-06; NRSC-Bhuvan, Hyderabad; CGWB, Bangalore; Chaitanya Geo Lynx, Hospet and UGC-MRP
[42-73/2013(SR); dt:12.03.2013], New Delhi for financial support.