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—3S technology is the effective method to carry out the dynamic monitoring of soil and water erosion. The paper select XiangXi watershed as the study region. Firstly, extracting erosion factors like vegetation coverage, land-use types and slop information, then conducting spatial overlay analysis to extract distribution of soil erosion intensity. Finally, analysing the change tendency by using transfer matrix to provide basic data for soil and water conservation. Results suggested that the intensity of soil erosion was getting better from 2016 to 2017, the Micro-degree and Slight-degree were slightly increased, the Medium-degree and Dought-degree were slightly reduced, the Extrem-degree and Vigorous-degree were alleviated.

Study on Soil and Water Erosion of Xiang Xi Watershed Based on 3S Dynamic Monitoring