1. Member, ASCE
2. Prof., Envir. Engrg. Res. Ctr., Dept. of Civ. Engrg., Univ. of Hong Kong, Pokfulam Rd., Hong Kong; corresponding author.
3. Assoc. Prof., Dept. of Envir. Engrg., East China Univ. of Sci. and Technol., Meilong Rd., Shanghai, China; formerly, Postdoctoral Fellow, Univ. of Hong Kong, Hong Kong.