Differences of Soil Infiltration Characteristics Between Exposed Rock-soil Interface and Non-rock-soil Interface in Rocky Desertification Area of Karst Plateau

XU Shengbing; PENG Xudong; DAI Quanhou; LIU Tingting; CEN Longpei

doi:10.13870/j.cnki.stbcxb.2022.05.019

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Differences of Soil Infiltration Characteristics Between Exposed Rock-soil Interface and Non-rock-soil Interface in Rocky Desertification Area of Karst Plateau

更新时间：2025-03-12

- Differences of Soil Infiltration Characteristics Between Exposed Rock-soil Interface and Non-rock-soil Interface in Rocky Desertification Area of Karst Plateau
- Vol. 36, Issue 5, Pages: 136-143(2022)
- 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
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.05.019
  CLC： S715.3
- Published：2022
- 稿件说明：
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XU Shengbing, PENG Xudong, DAI Quanhou, et al. Differences of Soil Infiltration Characteristics Between Exposed Rock-soil Interface and Non-rock-soil Interface in Rocky Desertification Area of Karst Plateau[J]. 2022, 36(5): 136-143.
DOI：

XU Shengbing, PENG Xudong, DAI Quanhou, et al. Differences of Soil Infiltration Characteristics Between Exposed Rock-soil Interface and Non-rock-soil Interface in Rocky Desertification Area of Karst Plateau[J]. 2022, 36(5): 136-143. DOI： 10.13870/j.cnki.stbcxb.2022.05.019.

摘要

为揭示喀斯特石漠化区露石岩—土界面与非岩—土界面土壤渗透特性差异

通过环刀法探究岩—土界面与非岩—土界面土壤入渗特征及入渗模型适应性。结果表明:(1)岩—土界面0—10 cm土层和10—20 cm土层土壤容重大于非岩—土界面

土壤总孔隙度小于非岩—土界面。岩—土界面含水率和毛管孔隙度总体上大于非岩—土界面

非毛管孔隙度、黏粒和排水能力总体上小于非岩—土界面。(2)岩—土界面土壤的入渗能力总体上小于非岩—土界面

其初始入渗速率、平均入渗率、稳定入渗率小于非岩—土界面(平直形除外)。(3)3种形状岩—土界面0—10 cm土层和10—20 cm土层土壤的初始入渗速率、平均入渗率和稳定入渗率均表现为平直形>外凸形>内凹形。非岩—土界面土壤入渗与岩—土界面具有相似性

主要由土壤容重和总孔隙度共同决定。(4) Horton模型对岩—土界面与非岩—土界面土壤入渗的拟合效果优于Kostiakov模型和Philip模型

能更好地模拟喀斯特地区复杂情况下土壤的入渗特征。研究以期为深入认识喀斯特地区水分入渗及水土流失提供新的研究思路与科学理论支撑。

Abstract

In order to reveal the difference of soil infiltration characteristics between exposed rock-soil interface and non-rock-soil interface in karst rocky desertification area

the ring knife method was used to explore the soil infiltration characteristics of rock-soil interface and non-rock-soil interface

as well as the adaptability of infiltration model. The results showed that: (1) The bulk density of 0—10 cm soil layer and 10—20 cm soil layer soil at rock-soil interface was higher than that at non-rock-soil interface

while the total soil porosity was lower than that at non-rock-soil interface. The water content and capillary porosity of rock-soil interface was generally greater than that of non-rock-soil interface

while non-capillary porosity

clay particles and drainage capacity was generally less than that of non-rock-soil interface. (2) The infiltration capacity of rock-soil interface was generally less than that of non-rock-soil interface

and the initial infiltration rate

average infiltration rate and stable infiltration rate at rock-soil interface was lower than that at non-rock-soil interface (except flat). (3) The initial infiltration rate

average infiltration rate and stable infiltration rate of the 0—10 cm soil layer and 10—20 cm soil layer of the three shapes at rock-soil interface followed the order of flat > convex > concave. The infiltration at non-rock-soil interface was similar to that at rock-soil interface

which was mainly determined by soil bulk density and total porosity. (4) The fitting effects of Horton model on soil infiltration at rock-soil interface and non-rock-soil interface were better than Kostiakov model and Philip model

and it could better simulate soil infiltration characteristics under complex conditions in karst areas. This study was expected to provide new research ideas and scientific theoretical support for the in-depth understanding of water infiltration and soil erosion in karst areas.

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