1. Ph.D. Scholar, Dept. of Civil Engineering, Indian Institute of Technology, Kharagpur, India 721302. E-mail: akmishra@civil.iitkgp.ernet.in
2. Associate Professor, Dept. of Civil Engineering, Indian Institute of Technology, Kharagpur, India 721302. E-mail: venkapd@civil.iitkgp.ernet.in
3. Caroline and William N. Lehrer Distinguished Chair in Water Engineering, Dept. of Biological and Agricultural Engineering, Texas A&M Univ., TX 77843-2117. E-mail: vsingh@tamu.edu