1. Associate Professor, Water Resources Management Program, College of Graduate Studies, Arabian Gulf Univ., P.O. Box 26671, Manama, Bahrain; formerly, Associate Professor, Drainage Research Institute, National Water Research Centre, Delta Barrages (El Kanater), P.O. Box 1362/5, Cairo, Egypt (corresponding author).
2. Associate Professor, Drainage Research Institute (DRI), National Water Research Centre (NWRC), Delta Barrages (El Kanater), P.O. Box 1362/5, Cairo, Egypt.
3. Assistant Researcher, National Water Research Centre, Fum Ismailia Canal, P.O. Box 74, Shoubra El-Kheima 13411, Cairo, Egypt.