1. Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576
2. Department of Water Resources and Environmental Engineering, Tamkang University, New Taipei City 25137, Taiwan
3. Department of Ocean and Resources Engineering, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA
4. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798