1. General Supervisor, Information Center and Decision Support Systems, Ministry of Water Resources and Irrigation, Kornish El-Nile, Imbaba-Giza 12666, Egypt.
2. Associate Professor, Nile Water Strategic Research Unit, National Water Research Center, NWRC Administration Building, P.O. Box 13621/5, El-Kanater, Kalyoubia, Egypt.
3. Professor, Dept. of Civil Engineering, Colorado State Univ., Ft. Collins, CO 80523-1372.