1. Research Associate, DHI-NTU Water and Environment Research Centre and Education Hub, Nanyang Technological Univ., 50 Nanyang Ave., Singapore 639798.
2. Assistant Professor, School of Civil and Environmental Engineering, Nanyang Technological Univ., 50 Nanyang Ave., Singapore 639798.
3. Lecturer, School of Engineering, Monash Univ., Sunway Campus, Jalan Lagoon Selatan, Bandar Sunway, 46150 Selangor Darul Ehsan, Malaysia (corresponding author).