1. Head and Professor, Division of Environmental and Water Resources Engineering, School of Civil and Structural Engineering, Block N1 #1A-29, Nanyang Technological Univ., Nanyang Ave., Singapore 639798.
2. Assistant Professor, Division of Environmental and Water Resources Engineering, School of Civil and Structural Engineering, Nanyang Technological Univ., Nanyang Ave., Singapore 639798.
3. Research Associate, Division of Environmental and Water Resources Engineering, School of Civil and Structural Engineering, Nanyang Technological Univ., Nanyang Ave., Singapore 639798.