1School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
2Water & Development Research Group, Department of Built Environment, Aalto University, 15200 00076, Espoo, Finland
3Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, 8600 Duebendorf, Switzerland
4Department of Environmental Science, University of Basel, Petersgraben 35, 4001 Basel, Switzerland
5Department of Geographical Sciences, University of Maryland, College Park, USA
6School of Finance and Management, SOAS, University of London, London, UK