水土保持研究2024，Vol.31Issue(2)：11-17,7.DOI:10.13869/j.cnki.rswc.2024.02.026
砒砂岩坡面侵蚀产沙规律及多元回归估算模型研究
Study on the Pattern of Erosion and Sediment Yield and Multiple Regression Estimation Model of Pisha Sandstone Slope
摘要
Abstract
[Objective]The aims of this study are to explore the pattern of erosion on Pisha sandstone slope and establish the estimation model,and to provide reference for innovating the new measures of soil erosion control in Pisha sandstone area.[Methods]The effects of rainfall intensity(20,50 and 80 mm/h),vegeta-tion coverage(10%,30% and 50% )and slope(20°,30°and 40°)on sediment yield pattern were examined,and an estimation model of erosion and sediment yield on slope was established through multiple nonlinear regression equation.[Results]The sediment yield curve of the Pisha sandstone slope appeared a gentle growth,and the sediment yield in per minute increased gradually with the duration of rainfall and then became stable.Among the factors,the sediment yield was most strongly affected by rainfall intensity,followed by vegetation,and the smallest effect factor is slope.Additionally,the sediment reduction efficiency of vegetation was also affected by rainfall intensity.As rainfall intensity increased,the sediment reduction efficiency of vegetation with low coverage decreased.The sediment yield had a power function relationship with rainfall intensity,while it had a linear relationship with slope gradient and vegetation coverage within a certain range.A multivariate nonlinear regression model for erosion and sediment yield of Pisha sandstone slope was established.[Conclusion]The fitting correlation coefficient R2 of the established erosion and sediment yield estimation equation reaches 0.980 under the specific conditions of the standard plot,which can effectively reflect the relationship between slope erosion and sediment yield and various influencing factors,and the estimation model has high applicability.关键词
砒砂岩/模拟降雨/侵蚀产沙/多元非线性模型Key words
Pisha sandstone/simulated rainfall/sediment yield/nonlinear mode分类
农业科技引用本文复制引用
梁止水,陈煜,孙悦,高海鹰,吴智仁..砒砂岩坡面侵蚀产沙规律及多元回归估算模型研究[J].水土保持研究,2024,31(2):11-17,7.基金项目
国家自然科学基金(42207394) （42207394）
江苏省自然科学基金(BK20190348) （BK20190348）
国家重点研发计划课题(2017YFC0504505) （2017YFC0504505）
广西重点研发计划项目(桂科AB21196048) （桂科AB21196048）
中央财政林草科技推广示范项目(2023-TG17) （2023-TG17）
