1. College of Water Resources and Architectural Engineering, Northwest A&F University, 23 Weihui Road, Yangling District, Shaanxi 712100, China
2. Key Laboratory of Agricultural Soil and Water Engineering in Arid Regions (Ministry of Education), Northwest A&F University, Yangling, Shaanxi 712100, China
3. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China