2001 GUPTA, Sushil Kumar (b. 1946) Ph.D.,F.G.S.A., Scientist ‘SG’, Physical Research Laboratory, P.O.Box 4218, Navrangpura, Ahmedabad – 380009; Res. A-2, Shri Krishna (BOD.) Society, NR.LAAD Society, Ahmedabad – 380054; Tel: 079-6302129 Extn. 4259(O), 6850819(R); Fax: 6301502; Email: ; Sp. Hydrology.