1. Assistant Professor, College of Agricultural Engineering, Rajendra Agricultural Univ., Bihar, Pusa 848 125, India.
2. Professor and Head, Department of Irrigation and Drainage Engineering, G. B. Pant Univ. of Agriculture and Technology, Pantnagar 263 145, India.
3. Associate Professor, Department of Irrigation and Drainage Engineering, G. B. Pant Univ. of Agriculture and Technology, Pantnagar 263 145, India.