1. Research Assistant, Central Water and Power Research Station, Khadakwasla, Pune 411 024, India; formerly, Research Scholar, Civil Engineering Dept., I.I.T, Bombay, India.
2. Professor, Dept. of Civil Engineering, Indian Institute of Technology, Bombay, Mumbai 400 076, India (corresponding author).
3. Joint Director, Central Water and Power Research Station, Khadakwasla, Pune 411 024, India.