1. Professor, Dept. of Civil Engineering, Center for Research in Water Resources, The Univ. of Texas at Austin, Austin, TX 78712 (corresponding author).
2. Graduate Student, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Texas, Austin, TX 78712.
3. Research Associate Professor, Dept. of Civil, Architectural, and Environmental Engineering, Univ. of Texas, Austin, TX 78712.