1. College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China
2. Beijing Laboratory of Water Resources Security, Capital Normal University, Beijing 100048, China
3. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
4. Laboratory of Air and Environmental Monitoring, Department of Environment and Forest Engineering, School of Engineering and Applied Sciences, National University of Mongolia, Ulaanbaatar 210646, Mongolia