1. Assistant Professor, Irrigation Engineering and Hydraulic Department, Alexandria University, Alexandria, Egypt
2. Graduate Student, Civil and Environmental Engineering Department, University of South Carolina, 300 Main St., Columbia, SC 29208, USA
3. Mr. and Mrs. Irwin B Khan Professor and Associate Dean for International Program and Continued Education, College of Engineering and Computing, University of South Carolina, 300 Main St., Columbia, SC 29208, USA
4. Professor, Department of Civil and Environmental Engineering, University of South Carolina, 300 Main St., Columbia, SC 29208, USA