Concept and calculation methods of erosion control degree:A case study of the Wangmaogou Watershed
(1. State Key Laboratory of Soil Erosion and Dryland Agriculture on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, 712100,Yangling, Shaanxi; 2. Key Laboratory of Northwest Water Resources and Environment Ecology of Ministry of Education at Xian University of Technology, 710048, Xi’an; 3. Upper and Middle Yellow River Bureau, Yellow River Conservancy Commission of the Ministry of Water Resources, 710021, Xi’an: China)
Abstract In this paper, the erosion control degree was defined as the ratio of the minimum possible soil erosion modulus and actual soil erosion modulus. The minimum possible soil erosion modulus was 2573t/(km2·a)) under soil and water conservation measures in Wangmaogou Watershed. Based on the land use map in 2004, the actual soil erosion modulus of Wangmaogou Watershed was 7413t/(km2·a). According to the definition of the erosion control degree, the erosion control degree of Wangmaogou Watershed was at a lower level of 0.35, due to existed sloping farmland and less forestry area. Therefore, we suggested that erosion control degree should be as the evaluation indicator for the status of soil and water conservation.
GAO Hai-Dong-1,LI Tie-Bin-1,2, et al. Concept and calculation methods of erosion control degree:A case study of the Wangmaogou Watershed[J]. SSWCC, 2013, 11(1): 17-24.
