1. The Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences, Ministry of Education, Xianyang 712100, China
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Xianyang 712100, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. School of Geographical Sciences, China West Normal University, Nanchong 637009, China
5. Sichuan Provincial Engineering Laboratory of Monitoring and Control for Soil Erosion in Dry Valleys, China West Normal University, Nanchong 637009, China
6. Institute of Soil and Water Conservation, Northwest A&F University, Xianyang 712100, China