西北水电Issue(1)：14-21,8.DOI:10.3969/j.issn.1006-2610.2025.01.002
无定河流域水沙变化的驱动因素研究
Research on the Driving Factors of Runoff and Sediment Changes in the Wuding River Basin
摘要
Abstract
Soil erosion is severe on the Loess Plateau.A refined analysis of the driving factors of the changes in water and sediment in typi-cal river basins is of great significance for basin management.In order to clarify the driving factors of the changes in water and sediment in typical river basins on the Loess Plateau,the Wuding River Basin on the Loess Plateau was taken as the research object.The double cumula-tive curve,Pearson correlation analysis,and PLS-SEM model were used to analyze the impacts of various factors on the changes in runoff and sediment transport.The results show that from 1960 to 2018,the runoff and sediment transport showed a significant downward trend.The av-erage annual decrease in runoff was 14.5 million cubic meters,and the average annual decrease in sediment transport was 141,320 tons.The NDVI increased from 0.26 to 0.45,with an annual growth rate of 0.47%.The land use structure mainly shifted from cultivated land and un-used land to forest land and grassland.The areas of forest land and grassland increased by42.45%and2.92%,respectively.Compared with the period before the abrupt change,the contributions of human activities to the decrease in runoff were 80.77%and 111%,respectively;and the contributions to the decrease in sediment transport were 97.74%and 114.79%,respectively.Factors such as precipitation,land use,and vegetation coverage can explain 67.2%and 68.0%of the changes in runoff and sediment transport in the Wuding River Basin,re-spectively.Among them,precipitation and land use factors are the main driving factors for the changes in runoff and sediment transport in the Wuding River Basin.The research results quantify the impacts of different factors on runoff and sediment transport,which can provide a ref-erence for soil and water conservation measures and sustainable management in the Wuding River Basin.关键词
径流量/输沙量/驱动因素/PLS-SEM/水土保持/无定河Key words
Runoff/Sediment Transport/Driving Factors/PLS-SEM/Soil and Water Conservation/Wuding River分类
农业科学引用本文复制引用
孙雯,徐国策..无定河流域水沙变化的驱动因素研究[J].西北水电,2025,(1):14-21,8.基金项目
国家自然科学基金项目(52022081) （52022081）
