1. Professor, The State Key Laboratory of Water Resources and Hydropower Engineering, Wuhan Univ., Wuhan 430072, China; and, Senior Research Fellow, School of Built Environment, Heriot-Watt Univ., Edinburgh EH14 4AS, UK.
2. Professor, School of Built Environment, Heriot-Watt Univ., Edinburgh EH14 4AS, UK.
3. Senior Lecturer, School of Built Environment, Heriot-Watt Univ., Edinburgh EH14 4AS, UK.
4. Professor, Dept. of Geography, Univ. of Southampton, Southampton SO17 1BJ, UK.