1. Professor of Civil Engineering, Center for Research in Water Resources, The Univ. of Texas at Austin, Austin, TX 78712 (corresponding author).
2. Senior Staff Engineer, Geosyntec Consultants, 3600 Bee Caves Road, Suite 101, Austin, TX 78746.
3. Research Associate Professor, Center for Research in Water Resources, The Univ. of Texas at Austin, Austin, TX 78712.