Vertical Permeability of Karst Shallow Fissure and Its Influencing Factors

LI Yanqiu; DAI Quanhou; REN Qingqing; ZHU Liekun; CEN Longpei; LAN Xue; FU Wenbing

doi:10.13870/j.cnki.stbcxb.2020.03.023

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Vertical Permeability of Karst Shallow Fissure and Its Influencing Factors

更新时间：2025-03-12

- Vertical Permeability of Karst Shallow Fissure and Its Influencing Factors
- Vol. 34, Issue 3, Pages: 150-155(2020)
- 作者机构：
  
  1. 贵州大学林学院,贵阳,550025
  2. 贵州大学土壤侵蚀与生态修复研究中心,贵阳,550025
  3. 山地植物资源保护与种质创新教育部重点实验室,贵阳,550025
  4. 4山地生态与农业生物工程协同创新中心,贵阳,550025
  5. 贵州师范大学地理与环境科学学院,贵阳,550025
  6. 贵州华保环境技术咨询有限公司,贵阳,550025
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.03.023
  CLC： S157.1
- Published：2020
- 稿件说明：
移动端阅览
LI Yanqiu, DAI Quanhou, REN Qingqing, et al. Vertical Permeability of Karst Shallow Fissure and Its Influencing Factors[J]. 2020, 34(3): 150-155.
DOI：

LI Yanqiu, DAI Quanhou, REN Qingqing, et al. Vertical Permeability of Karst Shallow Fissure and Its Influencing Factors[J]. 2020, 34(3): 150-155. DOI： 10.13870/j.cnki.stbcxb.2020.03.023.

摘要

为探究喀斯特浅层裂隙所赋存土壤各土层渗透性特征及影响因素，测定了喀斯特典型的浅层裂隙中赋存土壤0—10，10—20，20—30，30—50，50—70，70—100 cm土层的饱和导水率、机械组成、容重、非毛管孔隙度、毛管孔隙度、总孔隙度和有机碳含量等土壤属性。结果表明：（1）喀斯特浅层裂隙中各土壤属性均随着土层深度变化呈现出递增或递减的趋势，其中容重、黏粒含量、毛管孔隙度均随着土层深度而增长，饱和导水率、有机碳、非毛管孔隙度等土壤属性随土层深度的变化规律相反，呈递减趋势。（2）喀斯特浅层裂隙中土壤饱和导水率变异系数高于非喀斯特地区，且随土层深度变化呈波动增长趋势；其随土层深度变深而减小的趋势可用对数函数进行模拟（R2=0.946 2）。（3）通过Pearson相关性分析，裂隙中所赋存土壤的饱和导水率除了与机械组成中黏粒含量、粉粒含量为显著性相关（P<0.05），与砂粒含量相关性不显著以外（P>0.05），与其余各土壤属性均呈极显著性相关（P<0.01），且非毛管孔隙度相关性最高（P=0.898）。浅层裂隙土壤非毛管孔隙是影响其渗透性的主要因子，而裂隙中深层土壤拥有较多善于贮存植物所需水分的毛管孔隙。因此，对于土地资源匮乏的喀斯特地区，充分合理利用裂隙中深层土壤的水分成为今后研究的重点。研究结果可为喀斯特地区水分运移、石漠化治理及植被恢复提供科学依据。

Abstract

By measuring the saturated hydraulic conductivity

mechanical composition

bulk density

non-capillary porosity

capillary porosity

total porosity

organic carbon content and other soil properties of Karst shallow fissure soil (0—10

10—20

20—30

30—50

50—70

70—100 cm)

the permeability characteristics and influencing factors of various soil layers in Karst shallow fissures were studied. The results showed that: (1) Soil properties in Karst shallow fissures showed an increase or decrease trend with the change of soil depth

in which the bulk density

clay content and capillary porosity increased with the change of soil depth

while the change trends of the saturated hydraulic conductivity

organic carbon and non-capillary porosity with the depth of the soil layer were opposite. (2) The variation coefficient of soil saturated hydraulic conductivity was higher than that in non-Karst area

and it showed an volatility growth trend with the change of soil layer. At the same time

the trend of decreasing with the depth of soil layer could be simulated by logarithmic function (R2=0.946 2). (3) Pearson correlation analysis showed that the saturated hydraulic conductivity of the soil in the fissures was significantly related to the clay content and silt content in the mechanical composition (P<0.05)

but was not related to the sand content (P>0.05)

and was significantly related to other soil properties (P<0.01)

and the non-capillary porosity had the highest correlation (P=0.898). Non-capillary pore of shallow fissured soil was the main factor affected its permeability

and deep fissured soil had more capillary pore which was good at storing water needed by plants. Therefore

in Karst areas which is lack of land resources

it will be the research focus in the future to make full and rational use of water distribution in deep soil of fissures. The results of this study could provide scientific basis for water transport

rocky desertification control and vegetation restoration in Karst areas.

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