1. School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
2. Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong 999077, China
3. Department of Civil and Environmental Engineering, The University of Auckland, Auckland 1010, New Zealand
4. State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
5. PowerChina Eco-Environmental Group Co., Ltd., Shenzhen 518133, China