1. Research Scholar, Water Resources Development and Management Dept., Indian Institute of Technology Roorkee, Roorkee 247 667, India (corresponding author).
2. Associate Professor, Water Resources Development and Management Dept., Indian Institute of Technology Roorkee, Roorkee 247 667, India.
3. Professor, Water Resources Development and Management Dept., Indian Institute of Technology Roorkee, Roorkee 247 667, India.
4. Professor and Head, Dept. of Geoinformatics, Hydrology and Modelling, Friedrich-Schiller Univ. Jena, Loebdergraben 32, 07743 Jena, Germany.