Yi Liu, Earth Science Associates, Powell, TN, United States, Jiu Jiu Jiao, Univ Hong Kong, Hong Kong, Hong Kong, Wenzhao Liang, University of Hong Kong, Hong Kong, Hong Kong, Isaac R Santos, Southern Cross Univerisity, Lismore, Australia, Xingxing Kuang, South University of Science and Technology of China, School of Environmental Science and Engineering, Washington, China and Clare E Robinson, University of Western Ontario, Civil and Environmental Engineering, London, ON, Canada