The Factors Influencing Soil Erosion Resistance Under Freeze-thaw Conditions

LU Chao; MAZHOU Jiatai; LI Jiahui; ZHANG Kuandi

doi:10.13870/j.cnki.stbcxb.2023.06.004

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The Factors Influencing Soil Erosion Resistance Under Freeze-thaw Conditions

更新时间：2025-03-12

- The Factors Influencing Soil Erosion Resistance Under Freeze-thaw Conditions
- Vol. 37, Issue 6, Pages: 25-33(2023)
- 作者机构：
  
  1. 西北农林科技大学水利与建筑工程学院, 陕西杨陵,712100
  2. 西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.06.004
  CLC：
- Published：2023
- 稿件说明：
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LU Chao, MAZHOU Jiatai, LI Jiahui, et al. The Factors Influencing Soil Erosion Resistance Under Freeze-thaw Conditions[J]. 2023, 37(6): 25-33.
DOI：

LU Chao, MAZHOU Jiatai, LI Jiahui, et al. The Factors Influencing Soil Erosion Resistance Under Freeze-thaw Conditions[J]. 2023, 37(6): 25-33. DOI： 10.13870/j.cnki.stbcxb.2023.06.004.

摘要

为揭示季节性冻融区土壤侵蚀阻力的变化机制

确定影响土壤侵蚀阻力主控因子

通过室内冻融模拟、水槽冲刷和土壤抗剪试验

对黄绵土(SM粉质壤土)、风沙土(WS砂壤土)和黑土(KS黏壤土)侵蚀阻力影响因素进行研究。结果表明:(1)随着冻融循环次数增加

细沟可蚀性值逐渐升高

而临界剪切力降低。经历10次冻融循环后

SM粉质壤土、WS砂壤土和KS黏壤土的细沟可蚀性分别增加76%

63%

11%

临界剪切力分别减小37%

13%

91%。(2)细沟可蚀性随土壤抗剪强度、黏聚力和内摩擦角增大而减小

临界剪切力则呈相反趋势。与内摩擦角相比

黏聚力更适合用来表征土壤侵蚀阻力。采用黏聚力对SM粉质壤土、WS砂壤土和KS黏壤土的细沟可蚀性进行预测

决定系数(R2)分别为0.42

0.78

0.50

平均为0.57;对临界剪切力的预测效果较差

决定系数(R2)分别为0.16

0.14

0.18

平均仅为0.16。(3)根据皮尔逊相关分析结果

基于土壤的初始含水率、冻融循环次数、力学特性以及土壤参数等分别建立细沟可蚀性(R2=0.85)和临界剪切力(R2=0.79)预测模型表明

在季节性冻融区冻融循环作用对土壤侵蚀的影响巨大

结果可为各地区水土保持措施优化和土壤侵蚀防治提供参考。

Abstract

In order to reveal the change mechanism of soil erosion resistance in seasonal freeze-thaw region and determine the main controlling factors affecting soil erosion resistance

the Loess soil (SM silty loam)

Aeolian sandy soil (WS sandy loam) and Black soil (KS clay loam) were studied by indoor freeze-thaw simulation

flume erosion test and soil shear test. The results showed that: (1) With the increase of freeze-thaw cycles

the value of rill erodibility gradually increased

while the critical shear stress decreased. After ten freeze-thaw cycles

the rill erodibility of SM silty loam

WS sandy loam and KS clay loam increased by 76%

63% and 11%

respectively

and the critical shear stress decreased by 37%

13% and 91%

respectively. (2) Rill erodibility decreased with the increase of soil shear strength

cohesion and internal friction angle

while the critical shear stress showed the opposite trend. Compared with the internal friction angle

cohesion was more suitable to characterize soil erosion resistance. The rill erodibility of SM silty loam

WS sandy loam and KS clay loam was predicted by cohesion

and the determination coefficients R2 were 0.42

0.78 and 0.50

respectively

with an average of 0.57. The prediction effect on the critical shear stress was poor

and R2 were 0.16

0.14 and 0.18

respectively

with an average of only 0.16. (3) According to the results of Pearson correlation analysis

the prediction models of rill erodibility (R2=0.85) and critical shear stress (R2=0.79) were established based on initial soil moisture content

freeze-thaw cycles

mechanical properties and soil parameters

respectively. Studies have shown that the effects of freeze-thaw cycles on soil erosion are enormous in areas with seasonal freeze-thaw region. The findings can serve as a reference for optimizing soil and water conservation practices and controlling soil erosion across different regions.

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