1. Associate Professor, Dept. of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttrakhand, India (corresponding author).
2. Formerly, PG Student, Dept. of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttrakhand, India.
3. Professor, Institute of Hydraulic Engineering, Univ. of Stuttgart, Pfaffenwaldring 61, Stuttgart 70569, Germany.