1. Ph.D. Candidate, School of Civil & Environmental Engineering, Nanyang Technological Univ., Singapore 639798.
2. Hydraulic Engineer, Opus International Consultant, 100 Willis Street, Wellington 6011, New Zealand.
3. Assistant Professor, School of Civil & Environmental Engineering, Nanyang Technological Univ., Singapore 639798 (corresponding author).
4. Research Fellow, DHI-NTU Centre, Nanyang Technological Univ., Singapore 639798.
5. Professor, School of Civil & Environmental Engineering, Nanyang Technological Univ., Singapore 639798.