1. Division
of Environmental and Water Resources, School of Civil and Environmental
Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
2. Nanyang
Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One #06-08, Singapore 637141, Singapore
3. Department
of Civil Engineering, University of Hong Kong, Pokfulam, Hong Kong