海河水利Issue(2)：17-21,5.DOI:10.3969/j.issn.1004-7328.2026.02.004
黄土高原挖方工程坡面降雨侵蚀模拟研究
Simulation of Rainfall Erosion on Slopes of Earthwork Projects in the Loess Plateau
摘要
Abstract
Addressing severe rainfall erosion on excavated slopes in major engineering sites on the Loess Plateau—characterized by management difficulties,challenging vegetation restoration,and recurring erosion—this study utilized 2021 field monitoring data from 14 rainfall events at runoff plots on excavated slopes in the Yangjuangou watershed of Yan′an City.The Water Erosion Prediction Project(WEPP)model was used to simulate slope erosion under different conditions.Results indicated that:Slope erosion initially increased with slope gradient and then decreased,with an extremum corresponding to a critical slope gradient of 56°.The relationship between slope erosion and gradient was exponential at 0°-20° and parabolic(opening downward)above 30°.For short slope lengths(<40 m),the relationship between slope length and erosion was exponential,with an upper limit to the curve of erosion versus slope length.Higher rainfall intensity caused more significant slope erosion,and the erosion volume was linearly correlated with rainfall intensity.The rate of erosion increase was independent of slope gradient but negatively correlated with slope length,though not to a negative extent.Considering practical excavation needs,a slope gradient of approximately 70° and a slope length of around 2 m were recommended.This study provides practical guidance for earthwork operations,erosion control,and ecological restoration of excavated slopes in major engineering sites.关键词
黄土高原/坡面侵蚀/WEEP模型/挖方工程Key words
Loess Plateau/slope erosion/WEPP model/earthwork project分类
建筑与水利引用本文复制引用
段玉辉,吴幽,桑红辉,李文证..黄土高原挖方工程坡面降雨侵蚀模拟研究[J].海河水利,2026,(2):17-21,5.基金项目
青海省科技计划:极寒环境沥青路面抗滑特性劣化与自然修复关键技术研究(2025-QY-229) （2025-QY-229）
南昌工程学院博士科研启动项目:"盐渍田排水排盐溯源解析与灌排协同调控研究"(2023kyqd005) （2023kyqd005）
江西省水利厅科技项目"江西省中稻主要种植品种的水分利用研究"(202526YBKT23) （202526YBKT23）
青海民族大学大学生创新创业训练计划项目"生物炭对高寒区土壤理化性质的影响"(DCXM-2025-089) （DCXM-2025-089）
