1. Research Fellow, School of Civil and Environmental Engineering, Nanyang Technological Univ., Singapore 639798, Singapore (corresponding author).
2. Associate Professor, School of Civil and Environmental Engineering, Nanyang Technological Univ., Singapore 639798, Singapore.
3. Ph.D. Student, Nanyang Environmental and Water Research Institute, Interdisciplinary Graduate School, Nanyang Technological Univ., Singapore 639798, Singapore.