1. Hydraulics and Water Resources Engineering, Department of Civil Engineering; Indian Institute of Technology (BHU); Varanasi Uttar Pradesh India
2. Department of Civil Engineering; Indian Institute of Technology (BHU); Varanasi Uttar Pradesh India
3. Caroline and William N. Lehrer Distinguished Chair in Water Engineering and Distinguished Professor, Department of Biological and Agricultural Engineering and Zachry Department of Civil Engineering; Texas A & M University; College Station TX 77843-2117 USA