Erosion Resistance Characteristics and Influencing Mechanisms of Granite Collapse Wall Soils Before and After Disturbance

CHEN Yuyang; ZHOU Yiyang; MENG Ying; LI Xiaolin; ZHANG Yue; ZHANG Xiang; LIN Jinshi; HUANG Yanhe; JIANG Fangshi

doi:10.13870/j.cnki.stbcxb.2026.03.024

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Erosion Resistance Characteristics and Influencing Mechanisms of Granite Collapse Wall Soils Before and After Disturbance

Benggang Erosion Control and Ecological Security | 更新时间：2026-09-10

- Erosion Resistance Characteristics and Influencing Mechanisms of Granite Collapse Wall Soils Before and After Disturbance
- Journal of Soil and Water Conservation Vol. 40, Issue 3, Pages: 58-65(2026)
- 作者机构：
  
  1.福建农林大学资源与环境学院，福州 350002
  2.福建农林大学林学院，福州 350002
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2026.03.024
  CLC： S154.3
- CSTR：32310.14.stbcxb.2026.03.024
- Received：27 February 2026，
  
  Revised：2026-03-26，
  
  Accepted：05 April 2026，
  
  Published：28 June 2026
- 稿件说明：
移动端阅览
陈昱仰，周怡阳，蒙颖，等.花岗岩崩壁土壤扰动前后的侵蚀阻力特征及影响机制［J］.水土保持学报，2026，40（3）：58-65.2026， 40（3）：58-65.

CHEN Yuyang， ZHOU Yiyang， MENG Ying， et al. Erosion resistance characteristics and influencing mechanisms of granite collapse wall soils before and after disturbance［J］. Journal of Soil and Water Conservation，
陈昱仰，周怡阳，蒙颖，等.花岗岩崩壁土壤扰动前后的侵蚀阻力特征及影响机制［J］.水土保持学报，2026，40（3）：58-65.2026， 40（3）：58-65. DOI： 10.13870/j.cnki.stbcxb.2026.03.024. CSTR： 32310.14.stbcxb.2026.03.024.

CHEN Yuyang， ZHOU Yiyang， MENG Ying， et al. Erosion resistance characteristics and influencing mechanisms of granite collapse wall soils before and after disturbance［J］. Journal of Soil and Water Conservation， DOI： 10.13870/j.cnki.stbcxb.2026.03.024. CSTR： 32310.14.stbcxb.2026.03.024.

摘要

目的

土壤侵蚀阻力是表征土壤抵抗侵蚀能力的重要指标，包括细沟可蚀性与土壤临界剪切力。探究崩岗崩壁原状土与扰动土侵蚀阻力的演变规律，揭示土壤理化性质对侵蚀阻力的作用机制。

方法

以福建安溪花岗岩崩岗5个土层的原状土和模拟扰动土（模拟崩积体）为对象，测定土壤理化性质、抗剪强度等指标，通过室内水槽冲刷试验获得侵蚀阻力，结合相关分析、回归分析和结构方程模型解析影响机制。

结果

原状土侵蚀阻力存在显著垂直分异，崩壁表层土壤的细沟可蚀性显著低于深层，各土层扰动后细沟可蚀性增幅达65~3 571倍，其中红土-砂土层对扰动最为敏感；除碎屑层外，其余土层扰动后土壤临界剪切力均降低，降低幅度为0.21~0.65倍。黏粒含量、游离氧化铝含量等与细沟可蚀性呈极显著负相关，其中黏粒含量是影响原状土和扰动土细沟可蚀性的核心因子，土壤硬度在理化性质对可蚀性的影响中发挥重要中介作用。

结论

土体扰动显著降低崩岗侵蚀阻力，黏粒等胶结物质对维持土壤抗侵蚀能力至关重要，研究成果为崩岗综合治理提供了依据。

Abstract

Objective

Soil erosion resistance is an important indicator characterizing the ability of soil to resist erosion， including rill erodibility and critical shear stress. This study aims to explore the evolution characteristics of erosion resistance in undisturbed and disturbed soils in the collapse wall of Benggang， and to reveal the mechanisms by which soil physical and chemical properties affect erosion resistance.

Methods

Undisturbed soil samples and simulated disturbed soils （simulating colluvial deposits） from five soil layers of a granite Benggang in Anxi County， Fujian Province， were used as research objects. Soil physical and chemical properties， shear strength， and other indicators were measured. Erosion resistance was obtained through indoor flume scouring experiments. The influencing mechanisms were analyzed using correlation analysis， regression analysis， and structural equation modeling.

Results

Significant vertical differentiation was observed in the erosion resistance of undisturbed soils. The rill erodibility of surface soil on the collapse wall was significantly lower than that of deep layers. After disturbance， the rill erodibility of each soil layer increased by 65-3 571 times， among which the laterite–sand layer was the most sensitive to disturbance. Except for the clastic layer， the critical shear stress of other soil layers decreased after disturbance， with reductions of 0.21-0.65 times. Clay content and free alumina content showed extremely significant negative correlations with rill erodibility. Specifically， clay content was the core factor affecting rill erodibility of both undisturbed and disturbed soils， and soil hardness played an important mediating role in the influence of physical and chemical properties on erodibility.

Conclusion

Soil disturbance significantly reduces the erosion resistance of Benggang. Cementing agents such as clay particles are crucial for maintaining soil resistance to erosion. The findings provide a scientific basis for the comprehensive control of Benggang.

关键词

Keywords

references

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