1. School of Environment and Municipal Engineering, Lanzhou Jiao Tong University, Lanzhou 730070, Gansu, China
2. Observation and Research Station of Eco-Hydrology and National Park by Stable Isotope Tracing in Qilian Mountains, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
3. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
4. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
5. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China