1. Ph.D. Candidate, Civil and Environmental Engineering Dept., Univ. of Houston, Houston, TX 77054.
2. Professor, Civil and Environmental Engineering Dept., Univ. of Houston, Houston, TX 77054 (corresponding author).
3. Water Resources Engineer, CDM Inc., 3050 Post Oak Blvd., Suite 300, Houston, TX 77056.
4. Project Manager, Texas Commission on Environmental Quality, 12100 Park 35 Circle, Austin, TX 78753.