1. Professor and Head, Division of Environmental and Water Resources Engineering, School of Civil and Environmental Engineering, Nanyang Technological Univ., 50 Nanyang Ave., Singapore 639798.
2. Project Officer, Division of Environmental and Water ResourcesEngineering, School of Civil and Environmental Engineering, Nayang Technological Univ., 50 Nanyang Ave., Singapore 639798.
3. Research Associate, Division of Environmental and Water Resources Engineering, School of Civil and Environmental Engineering, Nanyang Technical Univ., 50 Nanyang Ave., Singapore 639798.
4. Associate Professor, Division of Environmental and Water Resources Engineering, School of Civil and Environmental Engineering, Nanyang Technical Univ., 50 Nanyang Ave., Singapore 639798.