1. Assistant Professor, Dept. of Applied Mechanics, Bengal Engineering and Science Univ., Shibpur, Howrah 711103, West Bengal, India; formerly, Postdoctoral Research Fellow, National Institute of Water and Atmospheric Research (NIWA), P.O. Box 8602, Christchurch, New Zealand. E-mail: debnath_koustuv@yahoo.com
2. Professor, Dept. of Engineering, Univ. of Aberdeen, Aberdeen, AB24 3UE, U.K. E-mail: v.nikora@abdn.ac.uk.
3. Research Assistant, Leichtweiss-Insitute for Hydraulic Engineering, TU Braunschweig, Beethovenstr. 51a, 38106 Braunschweig, Germany.
4. Professor, Hydraulic Engineering, Univ. of Stuttgart, Stuttgart 70569, Germany.
5. Research Engineer, IIHR-Hydroscience and Engineering, Univ. of Iowa, Iowa City, IA 52242-1585.