1. College of Urban and Environmental Sciences, Northwest University, Xi’an 710027, China
2. Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China
3. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang’an University, No. 126 Yanta Road, Xi’an 710054, China
4. School of Water and Environment, Chang’an University, No. 126 Yanta Road, Xi’an 710054, China