细沟间侵蚀影响因子交互作用定量分析
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S157.1

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国家自然科学基金项目(41877080,41907054)资助


Quantitative Analysis of Interactions between Interrill Erosion Influencing Factors
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National Natural Science Foundation of China ( Nos.41877080 ,41907054 )

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    摘要:

    细沟间侵蚀是多种影响因子共同作用形成的复杂过程,不同因子的作用依赖于其他因子的变化而变化。利用前人已发表数据,基于多元线性回归分析,定量分析土壤类型、雨强、坡度和坡长对坡面细沟间侵蚀过程影响及因子间交互作用效应。结果表明:雨强、坡度、细沟间可蚀性及坡长对细沟间侵蚀率的影响具有正向效应,雨强对细沟间侵蚀率的贡献最大(62.93%)。因子间交互作用分析表明,坡长的增加对坡度因子的贡献具有促进作用,对雨强因子的贡献具有抑制作用;坡度增加对坡长因子的贡献具有先促进后抑制的作用,对雨强因子的贡献则相反,20%为坡度对坡长和雨强交互作用方向变化的拐点;雨强增加对坡长因子和坡度因子具有正向交互作用,但是与坡长相比,坡度对雨强的依赖性更强。

    Abstract:

    [Objective] Interrill erosion is a complex process triggered jointly by a number of influencing factors, and the effects of each factor vary with changes in other factors.[Method] Based on the data published and available in the literature and multiple linear regression analysis, the effects of soil type, rainfall intensity, slope gradient and slope length on interrill erosion process and the interactions were quantitatively analyzed.[Result] Results show that rain intensity, slope gradient, interrill erodibility and slope length were the main factors contributing to interrill erosion rate positively, and among the factors, rain intensity was the major one, contributing (62.93%). Analysis of the interactions between these factors shows that the increase in slope length promoted the contribution of the factor of slope gradient, but inhibited the contribution of the factor of rain intensity. The increase in slope gradient promoted first and then inhibited the contribution of the factor of slope length, but did reversely the contribution of the factor of rain intensity. The slope gradient of 20% was the inflection point of the interaction between slope length and rain intensity, changing from positive to negative. The increase in rainfall intensity interacted positively with slope length and slope gradient. However, slope gradient was more dependent on rainfall intensity than slope length.[Conclusion] During the process of interrill erosion, the interactions observed between the factors of soil type, rainfall intensity, slope gradient and slope length were either positive or negative. All the findings in this study are of great significance for revealing mechanism of rill erosion and predicting soil erosion on slopes.

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周春红,张风宝,刘宝元,申楠.细沟间侵蚀影响因子交互作用定量分析[J].土壤学报,2022,59(2):420-429. DOI:10.11766/trxb202006250334 ZHOU Chunhong, ZHANG Fengbao, LIU Baoyuan, SHEN Nan. Quantitative Analysis of Interactions between Interrill Erosion Influencing Factors[J]. Acta Pedologica Sinica,2022,59(2):420-429.

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历史
  • 收稿日期:2020-06-25
  • 最后修改日期:2020-11-15
  • 录用日期:2020-12-28
  • 在线发布日期: 2021-01-06
  • 出版日期: 2022-02-11