1. Associate Researcher, Taiwan Typhoon and Flood Research Institute, National Applied Research Laboratories, Taichung 40763, Taiwan.
2. Professor, School of Civil and Environmental Engineering, Nanyang Technological Univ., Singapore 639798 (corresponding author).
3. Research Fellow, School of Civil and Environmental Engineering, Nanyang Technological Univ., Singapore 639798.
4. Associate Professor, School of Civil and Environmental Engineering, Nanyang Technological Univ., Singapore 639798.