1. Assistant Professor, Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic Univ., Hong Kong, China (corresponding author).
2. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic Univ., Hong Kong, China.
3. Chair Professor of Environmental Engineering, Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic Univ., Hong Kong, China.