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[1]LIU Huanhuan,GANG Chengcheng,WEN Zhongming,et al.Soil Erosion Dynamics Analysis in the Yanhe Basin During 2000-2018 Based on the Structural Vegetation Index[J].Research of Soil and Water Conservation,2022,29(05):1-7.

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Soil Erosion Dynamics Analysis in the Yanhe Basin During 2000-2018 Based on the Structural Vegetation Index

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 05 Page number: 1-7 Column: Public date: 2022-08-20

Title:: Soil Erosion Dynamics Analysis in the Yanhe Basin During 2000-2018 Based on the Structural Vegetation Index

Author(s):: LIU Huanhuan¹, GANG Chengcheng^2,3, WEN Zhongming^1,2,3, CHEN Tongde^2,3, LIU Yue¹, CHEN Yin¹; (1.College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Institute of Soil Dand Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 3.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China)

Keywords:: soil erosion; Yanhe Basin; vegetation structure; structural vegetation index(Cs)

CLC:: S157.1

DOI:: -

Abstract:: The Loess Plateau has the severest soil erosion problems, and is the key region of ‘Grain For Green' project in China. To further understand the role of vegetation in soil erosion, the Yanhe Basin was chosen as the study area. The vegetation coverage and management factor were calculated based on the Structural Vegetation Index(Cs). Then, the spatiotemporal dynamics of soil erosion intensity in Yanhe Basin during 2000—2018 were estimated by using the RUSLE model. The results showed that:(1)the NDVI and Cs-based estimation of the mean annual soil erosion in Yanhe Basin during 2000—2018 was 6 421.13 and 8 354.62 t/(km²·a), respectively; the soil erosion showed an overall decreasing trend over the 19 years, which decreased by 56.41% and 44.16%, respectively; the total area of regions with intensity lower than moderate erosion took up to more than 60% of total study area;(2)during 2000—2018, the soil erosion intensity varied significantly; the NDVI and Cs-based estimation showed that regions that experienced decreased soil erosion intensities occupied 62.45% and 53.70% of the total study area, respectively; the soil erosion condition in the upper and middle reaches of Yanhe recovered obviously;(3)both the NDVI and Cs estimation can monitor the vegetation recovery process; the Cs considers the horizontal and vertical structures of vegetation, which can reflect the soil and water conservation function of vegetation. Cs can provide references for further revealing the role of vegetation community in controlling the soil and water conservation.

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Last Update: 2022-08-20