1. Ph.D. Student, College of Hydrology and Water Resources, Hohai Univ., Nanjing 210098, PR China.
2. Chair Professor, Institute of Surface-Earth System Science, School of Earth System Science, Tianjin Univ., Tianjin 300072, PR China; Tianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai Rim, Tianjin Univ., Tianjin 300072, PR China (corresponding author).
3. Professor, Institute of Surface-Earth System Science, School of Earth System Science, Tianjin Univ., Tianjin 300072, PR China; Tianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai Rim, Tianjin Univ., Tianjin 300072, PR China.
4. Lecturer, School of Geography and Environment, Liaocheng Univ., Liaocheng 252000, PR China.