1. Research Scholar, Dept. of Hydrology, Indian Institute of Technology Roorkee, Roorkee 247667, India.
2. Associate Professor, Dept. of Hydrology, Indian Institute of Technology Roorkee, Roorkee 247667, India (corresponding author).
3. Professor, Dept. of Hydrology, Indian Institute of Technology Roorkee, Roorkee 247667, India.