1. Dept. of Civil and Environmental Engineering, Univ. of Massachusetts–Amherst, 130 Natural Resources Rd, Amherst, MA 01003; formerly, Ph.D. Student, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Urabana-Champaign, IL.
2. State Key Laboratory of Hydro-Science and Engineering, Dept. of Hydraulic Engineering, Tsinghua Univ., 1 Tsinghua Garden, Beijing, 100084, China; Visiting Scholar, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, Urbana-Champaign, IL.
3. Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews Ave, Urbana-Champaign, IL 61801 (corresponding author).