Soil Surface Crust Characteristic and Response Feature to Slope Erosion Base on Simulation Rainfall

CHEN Zheng-fa; XIA Qing; SHI Dong-mei; JIANG Guang-yi; GUO Hong-zhong

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Soil Surface Crust Characteristic and Response Feature to Slope Erosion Base on Simulation Rainfall

更新时间：2024-11-07

- Soil Surface Crust Characteristic and Response Feature to Slope Erosion Base on Simulation Rainfall
- Vol. 25, Issue 4, (2011)
- 作者机构：
  
  1. 西南大学资源环境学院
  2. 重庆市万盛区水务局
  3. 重庆市水土保持生态环境监测总站
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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CHEN Zheng-fa, XIA Qing, SHI Dong-mei, et al. Soil Surface Crust Characteristic and Response Feature to Slope Erosion Base on Simulation Rainfall[J]. 2011, 25(4).
DOI：

CHEN Zheng-fa, XIA Qing, SHI Dong-mei, et al. Soil Surface Crust Characteristic and Response Feature to Slope Erosion Base on Simulation Rainfall[J]. 2011, 25(4). DOI：

摘要

土壤表土结皮对坡面侵蚀过程具有重要影响

利用模拟降雨条件下土壤贯入和产流产沙试验

对不同降雨场次紫色土和黄壤表土结皮特征及坡面侵蚀响应进行研究。结果表明:(1)PT型贯入仪测定的贯入数值(P)与含水率(θ)成标准指数函数关系。(2)不同降雨场次表土结皮存在无结皮→弱结皮→强结皮→弱结皮→新结皮的动态发育过程

相同降雨条件下黄壤表土结皮强度大于紫色土的。(3)持续降雨过程不同降雨场次土壤表土结皮对溅蚀影响不明显

而与产流存在显著的动态响应关系

结皮强度越大产流量也越大

结皮对产流的影响随着降雨进行而有增大趋势

黄壤表土结皮的径流增加量大于紫色土的

而紫色土坡面结皮对产流量变化敏感程度大于黄壤。不同场次降雨过程土壤表土结皮对坡面侵蚀产沙影响存在差异

前4场降雨表土结皮强度与坡面侵蚀产沙有相同的变化趋势

4次降雨后土壤表土结皮表现为对坡面侵蚀有抑制作用。

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