1. Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an, People’s Republic of China
2. Department of Geography, Hong Kong Baptist University, Kowloon Tong, Hong Kong Special Administration Region
3. Institute of Geology, University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan
4. College of Geography and Environmental Science, Henan University, Kaifeng, People’s Republic of China