1. Scientist “C,” Ganga Plains South Regional Centre, National Institute of Hydrology, Walmi Campus Bhopal, Madhya Pradesh 462042, India.
2. Scientist “D,” Deltaic Regional Centre, National Institute of Hydrology, Siddartha Nagar, Kakinada, Andhra Pradesh 533003, India (corresponding author).
3. Scientist “G,” Ground Water Hydrology Division, National Institute of Hydrology, Roorkee, Uttrakhand 247667, India.