水土保持研究2025，Vol.32Issue(3)：45-54,10.DOI:10.13869/j.cnki.rswc.2025.03.012
密云水库上游侵蚀性降雨特征及水保措施对坡面水土流失的影响
Characteristics of erosive rainfall and the impact of soil and water conservation measures on soil and water loss in the upper reaches of Miyun Reservoir,China
摘要
Abstract
[Objective]This study explores the types of rainfall in the upstream area of the Miyun Reservoir and examines the impact of different soil and water conservation measures on soil erosion,providing a scientific basis for the prevention and control of soil and water loss in the study area.[Methods]Based on the data from 92 erosive rainfall events on the Shixia slope from 2014 to 2022,the study applied cluster analysis and variance analysis to reveal the effects of different soil and water conservation measures under erosive rainfall conditions.[Results](1)From 2014 to 2022,a total of 92 erosive rainfall events were observed in the study area.The annual average erosive rainfall was 311.27 mm.The erosive rainfall events were most concentrated in July and August.(2)Based on K-means clustering analysis,the erosive rainfall in the study area can be divided into three types:Type I(long duration,heavy rainfall,light rainfall intensity),Type Ⅱ(short duration,light rainfall,heavy rainfall intensity),and Type Ⅲ(medium duration,moderate rainfall,moderate rainfall intensity).Type Ⅱ was the most common erosive rainfall type in this area.(3)The soil and water conservation effects varied across different measures.Under the same rainfall conditions,high-coverage grassland(alfalfa),fish-scale pits(Platycladus orientalis),and terraced fields(maize)showed the best soil and water conservation benefits compared with bare land.However,the cultivation measures did not reduce runoff and sediment yield,but instead aggravated soil and water loss.(4)There was a positive correlation between sediment yield and maximum 30-minute rainfall intensity,and between runoff yield and rainfall erosivity.However,there was no significant correlation with rainfall duration or average rainfall intensity.[Conclusion]The maximum 30-minute rainfall intensity and rainfall erosivity are the key factors affecting runoff and sediment yield of slopes with different soil and water conservation measures.High-coverage vegetation measure is an effective way to reduce soil and water loss on slopes.Therefore,it is necessary to arrange soil and water conservation measures according to local conditions to maximize their effectiveness.关键词
水保措施/侵蚀性降雨/产流产沙Key words
soil and water conservation measures/erosive rainfall/slope runoff and sediment yield分类
农业科技引用本文复制引用
王玥欢,颜婷燕,魏商,赵娅娜,徐发军,王云琦,程金花..密云水库上游侵蚀性降雨特征及水保措施对坡面水土流失的影响[J].水土保持研究,2025,32(3):45-54,10.基金项目
北京市自然科学基金(8232040) （8232040）
北京市京津风沙源治理工程小流域综合治理水土保持效益监测(2021年)(2022QTZJJCXYJC44) （2021年）
