1. Water Resources Engineer, CDM Smith, 600 Wilshire Blvd., Los Angeles, CA 90017 (corresponding author).
2. Research Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois, 205 North Mathews Ave., Urbana, IL 61801.
3. Professor, Technion—Israel Institute of Technology Civil and Environmental Engineering, Haifa 32000, Israel.
4. Professor, Dept. of Civil and Environmental Engineering, Southern Methodist Univ., P.O. Box 750340, 3101 Dyer St., Dallas, TX 75275.