Infiltration Characteristics and Influencing Factors of Karst Shallow Fissured Soil

ZHU Liekun; DAI Quanhou; LI Yanqiu; TU Na; YAN Youjin

doi:10.13870/j.cnki.stbcxb.2021.02.007

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Infiltration Characteristics and Influencing Factors of Karst Shallow Fissured Soil

更新时间：2025-03-12

- Infiltration Characteristics and Influencing Factors of Karst Shallow Fissured Soil
- Vol. 35, Issue 2, Pages: 47-54(2021)
- 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. 贵州大学贵州省森林资源与环境研究中心,贵阳,550025
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.02.007
  CLC： S152.7
- Published：2021
- 稿件说明：
移动端阅览
ZHU Liekun, DAI Quanhou, LI Yanqiu, et al. Infiltration Characteristics and Influencing Factors of Karst Shallow Fissured Soil[J]. 2021, 35(2): 47-54.
DOI：

ZHU Liekun, DAI Quanhou, LI Yanqiu, et al. Infiltration Characteristics and Influencing Factors of Karst Shallow Fissured Soil[J]. 2021, 35(2): 47-54. DOI： 10.13870/j.cnki.stbcxb.2021.02.007.

摘要

为探索喀斯特地下浅层裂隙土壤水分运移规律，通过野外调查、单环入渗试验探索裂隙土壤的入渗特性及入渗模型的适应性。结果表明：（1）裂隙土壤初始入渗率为21.06~57.90 mm/min，入渗时间20~60 min后达到稳定入渗（4.21~13.69 mm/min），且入渗初期到最后的稳渗阶段存在着较大降幅（40.89%~89.08%），与非喀斯特地区相比，喀斯特裂隙土壤的入渗速率更快；裂隙土壤各入渗特征处于中等程度变异（变异系数为0.52~0.67）。（2）裂隙土壤各入渗特征与各土壤属性显著性相关较少（P<0.05），裂隙土壤的入渗能力与土壤容重、毛管孔隙度以及根系没有较好的相关性，受裂隙岩-土界面等因素影响，与非喀斯特地区的土壤入渗特征与影响因素有明显差异；喀斯特裂隙不同土地利用类型土壤的入渗能力为草地>农田>乔木>灌木。（3）利用回归模型对裂隙土壤入渗的拟合分析对比得出，Horton模型对喀斯特浅层裂隙土壤的入渗过程拟合效果优于Philip模型和Kastiakov模型，可以更好地模拟和预测喀斯特浅层裂隙土壤入渗能力和入渗过程。研究结果可为研究喀斯特地区坡面水分运移及地下漏失提供新的研究思路与科学理论依据。

Abstract

In order to explore the water movement law of karst shallow fractured soil

the infiltration characteristics of fractured soil and the adaptability of infiltration model were explored through field investigation and single ring infiltration test. The results showed that:(1) The initial infiltration rate of fissured soil was 21.06~57.90 mm/min

and the stable infiltration rate reached 4.21~13.69 mm/min after 20~60 min infiltration time

and there was a significant decrease from the initial to the final stable infiltration stages (40.89%~89.08%). Compared with non karst areas

the infiltration rate of karst fissured soil was faster

and the infiltration characteristics of fissured soil were in medium degree variation (coefficient of variation was 0.52~0.67). (2) Little significant correlations were observed between the infiltration characteristics and soil properties (P<0.05). The infiltration capacity of fissured soil had no significant correlation with soil bulk density

capillary porosity and root system. Affected by factors such as fissure rock soil interface

it was significantly different from that in non karst areas. The infiltration capacity of different land use types in karst fissure was grassland>farmland> arbor>shrub. (3) The results showed that Horton model was better than Philip model and Kastiakov model

and could better simulate and predict the infiltration capacity and infiltration process of karst shallow fissured soil. These results could provide new research ideas and scientific theoretical basis for the study of slope water movement and underground leakage in karst area.

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