西柳沟流域土壤风蚀时空变化及其对景观格局的响应OA北大核心

[Objective]The aims of this study are to investigate the response relationship between soil wind erosion and landscape pattern in Xiliugou watershed,and to provide scientific basis for ecological restoration in this area.[Methods]Based on meteorological,soil,vegetation cover,land use and remote sensing data,the corrected soil wind erosion model(RWEQ)was used to calculate and analyze the soil wind erosion and its influencing factors in the watershed from 2005 to 2020,and the land use change characteristics in the watershed were clarified.[Results](1)From 2005 to 2020,the soil wind erosion in Xiliugou showed an increasing trend and then a decreasing trend.The average wind erosion rates in 2005,2010,2015 and 2020 were 36.9,39.4,45.3 and 39.4 t/(hm2·a),respectively.And the overall spatial trend of erosion rate demonstrated the strong level in the north and the weak level in the south.(2)The values of meteorological factors changed significantly before and after 2015.Spatially,its value was lower in the north and higher in the south,but it varied greatly in the middle part.(3)The basin was dominated by bare land and low vegetation coverage,accounting for more than 79％of the total area.The land use was mainly grassland,accounting for more than 82％of the total area.The overall area of grassland was increasing,the overall was relatively broken,and the shape of patches was becoming complicated.Since 2010,the proportion of moderate and strong wind erosion in grassland had exceeded 85％.[Conclusion]The wind erosion in Xiliugou watershed has slightly decreased under long-term ecological protection and restoration,but in the face of climate change and human activities,scientifically implementing ecological restoration will still be an important research direction for the Xiliugou watershed in the future.