Advantage Infiltration Depth of Rainfall in Loess Area

TONG Xiao; PENG Jianbing; ZHU Xinghua; MA Penghui

doi:10.13961/j.cnki.stbctb.2017.03.039

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Advantage Infiltration Depth of Rainfall in Loess Area

- Advantage Infiltration Depth of Rainfall in Loess Area
- Bulletin of Soiland Water Conservation Vol. 37, Issue 3, Pages: 231-236(2017)
- 作者机构：
  
  1. 长安大学地质工程与测绘学院,陕西,西安,710054
  2. 西部矿产资源与地质工程教育部重点实验室,陕西,西安,710054
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.03.039
  CLC：
- Published：2017
- 稿件说明：
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TONG Xiao, PENG Jianbing, ZHU Xinghua, et al. Advantage Infiltration Depth of Rainfall in Loess Area[J]. Bulletin of Soiland Water Conservation, 2017, 37(3): 231-236.
DOI：

TONG Xiao, PENG Jianbing, ZHU Xinghua, et al. Advantage Infiltration Depth of Rainfall in Loess Area[J]. Bulletin of Soiland Water Conservation, 2017, 37(3): 231-236. DOI： 10.13961/j.cnki.stbctb.2017.03.039.

摘要

[目的] 分析黄土地区降雨入渗深度，为研究黄土滑坡破坏机理提供依据。[方法] 通过现场观测实验监测不同深度土体的含水量变化趋势，并基于颗粒离散元方法对降雨入渗过程进行数值计算。[结果] 监测结果表明黄土地区降雨入渗深度不超过1.5 m。进一步通过数值计算发现：优势通道入渗的深度和裂缝几何尺寸有关，裂缝越深、越宽，降雨入渗的深度越大，影响范围越广，且裂缝的几何形态随着降雨入渗过程的发展而发生变化。[结论] 黄土降雨入渗分为非饱和入渗和优势通道入渗2种，非饱和入渗深度有限，优势通道入渗深度更大，易诱发大规模滑坡灾害。

Abstract

[Objective] The depth of rainfall infiltration in loess region was analyzed in order to provide the basis for studying the mechanism of loess landslide.[Methods] The variations of soil water content at different depths were monitored by field observation

and the numerical simulation of rainfall infiltration process was carried out based on the particle discrete element method.[Results] The monitoring results showed that the depth of rainfall infiltration in loess area was less than 1.5 m. Numerical calculation found that the dominant channel infiltration depth is related to the geometry of the cracks

the deeper or the wider of the cracks

the deeper and wider of the rainfall infiltration. Besides

the cracks had different geometry characteristics in the process of rainfall infiltration.[Conclusion] The rainfall infiltration in loess can be divided into 2 types:unsaturated infiltration and dominant channel infiltration. The depth of unsaturated infiltration is limited

but the penetration depth of the dominant channel is comparatively larger that can potentially induce large-scale landslide disaster.

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references

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