1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Cornell Univ., Ithaca, NY 14853 (corresponding author).
2. Class of 1912 Professor in Engineering, Dept. of Civil and Environmental Engineering, Cornell Univ., Ithaca, NY 14853; and Professor, Institute of Hydrological and Oceanic Sciences, National Central Univ., Taoyuan County 32001, Taiwan.