水土保持学报2025，Vol.39Issue(2)：12-20,29,10.DOI:10.13870/j.cnki.stbcxb.2025.02.016
不同坡度条件下连续降雨及汇流对黑土坡面侵蚀的影响
Effects of Continuous Rainfall and Runoff under Different Slope Conditions on Hillslope Soil Erosion in the Black Soil Region
摘要
Abstract
[Objective]To investigate the characteristics of rill erosion on slopes under different slope gradients and rainfall-runoff conditions.[Methods]Continuous simulated rainfall and upper slope inflow tests were conducted to study the erosion processes on slopes with two slope gradients(5° and 10°)and across three rainfall-runoff stages(rainfall,inflow,and rainfall+inflow).[Results]The volumes of slope runoff and erosion increased with slope gradient.Under rainfall conditions at a 5° slope,the runoff and erosion volumes were 1.06 and 2.23 times of those under inflow conditions,respectively,while at a 10° slope,the runoff and erosion volumes were 1.26 and 3.34 times of those under inflow conditions.The runoff rate initially increased over time and then tended to stabilize.The initial runoff production time occurred earlier with increasing rainfall frequency and slope gradient,with both the stable runoff rate and sediment yield rate increasing correspondingly.Under the same slope gradient,the contribution rates of slope runoff and erosion under continuous rainfall conditions decreased with each additional rainfall event.Under continuous inflow conditions,the contribution rate of slope runoff was the highest during the first event,reaching 56.40%,while the contribution rate of slope erosion was the highest during the third event,being 87.50%.Correlation analysis revealed that slope runoff and erosion were highly significantly correlated with the rainfall inflow treatments and the interaction between slope gradient and rainfall inflow treatments(p<0.001).Variance analysis indicated that the effects of rainfall inflow treatments on slope runoff and erosion were highly significant(p<0.001),while the effects of slope gradient were moderately significant(p<0.01).Rill erosion accounted for 37.69%—85.45%and 53.99%—90.65%of the total slope erosion at the two slope gradients,respectively,with rill erosion increasing as the gradient increased.[Conclusion]The findings contribute to a deeper understanding of the mechanisms of rill erosion and hold significant implications for soil and water conservation efforts in the black soil region of Northeast China.关键词
细沟侵蚀/坡度/降雨/汇流/东北黑土区Key words
rill erosion/slope gradient/rainfall/inflow/black soil region分类
农业科技引用本文复制引用
王婷婷,沈海鸥,梁羽石,刘建祥,赵强,王雪滢,田立..不同坡度条件下连续降雨及汇流对黑土坡面侵蚀的影响[J].水土保持学报,2025,39(2):12-20,29,10.基金项目
国家自然科学基金项目(42401007) （42401007）
吉林省自然科学基金优秀青年基金项目(20240101024JJ) （20240101024JJ）
吉林省"黑土粮仓"科技会战"揭榜挂帅"重点项目(JJKH20240457HT) （JJKH20240457HT）
