1. Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of South Carolina, 300 Main St., Columbia, SC 29208.
2. Lecturer, Dept. of Irrigation and Hydraulics Engineering, Faculty of Engineering, Alexandria Univ., Alexandria, Egypt.
3. Mr. and Mrs. Irwin B. Kahn Professor, and Associate Dean (International Programs and Continuing Education), College of Engineering and Computing, Univ. of South Carolina, 300 Main St., Columbia, SC 29208 (corresponding author).
4. Distinguished Professor, Dept. of Civil and Environmental Engineering, Univ. of South Carolina, 300 Main St., Columbia, SC 29208.