1. Member, ASCE
2. Grad. Res. Asst., Dept. of Land, Air and Water Resour., Univ. of California, Davis, CA 95616; corresponding author. E-mail: xchu@ ucdavis.edu
3. Grad. Res. Asst., Dept. of Civ. and Envir. Engrg., Univ. of California, Davis, CA.
4. Prof., Dept. of Land, Air and Water Resour. and Dept. of Civ. and Envir. Engrg., Univ. of California, Davis, CA.
5. Prof., Dept. of Civ. Engrg., Univ. of Queensland, Brisbane, Australia.