Characteristics of Soil Saturated Hydraulic Conductivity and Its Influencing Factors at Different Landscape Positions in a Small Peak-Cluster Depression Watershed of the Karst Region

YU Xinrui; LI Xuezhang; ZHANG Shuaipu; HOU Senzheng; XU Xianli; WANG Kelin

doi:10.13870/j.cnki.stbcxb.2025.01.013

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Characteristics of Soil Saturated Hydraulic Conductivity and Its Influencing Factors at Different Landscape Positions in a Small Peak-Cluster Depression Watershed of the Karst Region

更新时间：2025-03-14

- Characteristics of Soil Saturated Hydraulic Conductivity and Its Influencing Factors at Different Landscape Positions in a Small Peak-Cluster Depression Watershed of the Karst Region
- Vol. 39, Issue 1, Pages: 30-37(2025)
- 作者机构：
  
  1. 桂林理工大学广西环境污染控制理论与技术重点实验室,广西,桂林,541004
  2. 中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,长沙,410125
  3. 中国科学院环江喀斯特生态系统观测研究站, 广西环江,547100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2025.01.013
  CLC： S152.5
- Published：2025
- 稿件说明：
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YU Xinrui, LI Xuezhang, ZHANG Shuaipu, et al. Characteristics of Soil Saturated Hydraulic Conductivity and Its Influencing Factors at Different Landscape Positions in a Small Peak-Cluster Depression Watershed of the Karst Region[J]. 2025, 39(1): 30-37.
DOI：

YU Xinrui, LI Xuezhang, ZHANG Shuaipu, et al. Characteristics of Soil Saturated Hydraulic Conductivity and Its Influencing Factors at Different Landscape Positions in a Small Peak-Cluster Depression Watershed of the Karst Region[J]. 2025, 39(1): 30-37. DOI： 10.13870/j.cnki.stbcxb.2025.01.013.

摘要

目的峰丛洼地是重要的喀斯特地貌类型之一，探明不同景观位置对Ks的影响规律可为深入理解该区水文过程提供参考。方法通过测定2种景观位置不同土层Ks和土壤理化性质，采用方差分析、回归分析和通径分析等方法研究不同景观位置Ks的分布特征及其影响因素。结果景观位置和土层对Ks分布有显著的影响(p＜0.05)，景观位置的影响主要体现在0~10、20~30 cm土层，土层的影响主要发生在坡地，而土地利用的影响不显著(p＞0.05)。景观位置对土壤颗粒组成和全磷影响不明显(p＞0.05)，而有机碳、全氮和体积质量随景观位置不同发生明显变化(p＜0.05)。坡地Ks与粉粒、砂粒、有机碳和全磷呈显著正相关(p＜0.05)，与黏粒和体积质量呈显著负相关(p＜0.05)；洼地Ks与体积质量呈显著正相关(p＜0.05)。通径分析表明，体积质量和有机碳是影响坡地和洼地Ks的主要因素。利用多元逐步回归建立坡地和洼地Ks的回归方程，其影响因素方差解释率分别为76.2%和32.6%。结论地貌特征分异对土壤水文参数分布有重要影响，可为喀斯特峰丛洼地小流域水土过程研究提供科学依据。

Abstract

Objective Peak-cluster depression is one of the important karst landform types. Exploring the influence of different landscape positions on soil saturated hydraulic conductivity (Ks) can provide a reference for further understanding of the hydrological processes in this area.Methods Saturated hydraulic conductivity and the corresponding soil physical and chemical properties of different soil depths on the slope and in the depression were measured. By measuring Ks and soil physical and chemical properties at different soil depths on the slope and in the depression

the distribution characteristics of Ks and the corresponding influencing factors were studied according to variance analysis

regression analysis and path analysis.Results Landscape position and soil depth had a significant influence on Ks distribution (p < 0.05). The influence of landscape position was mainly identified at 0—10 and 20—30 cm soil depths

and the influence of soil depth was primarily occurred found on the slope. The effect of land use on Ks was not significant (p > 0.05). The influence of landscape position on soil particle composition and total phosphorus was not obvious (p > 0.05)

but organic carbon

total nitrogen and bulk density changed significantly with landscape position (p < 0.05). For the slope

Ks was significantly positively correlated with silt

sand

organic carbon and total phosphorus (p < 0.05)

and significantly negatively correlated with clay and bulk density (p < 0.05). For the depression

there was a significant positive correlation between Ks and bulk density (p < 0.05). Path analysis indicated that bulk density and organic carbon were the primary factors affecting Ks for both the slope and depression. The regression equations of Ks for the slope and depression were established based on multiple stepwise regression

and the variance explanation rates of the influencing factors were 76.2% and 32.6%

respectively.Conclusion The results showed that the difference in geomorphic features had a major impact on the distribution of soil hydrological parameters

and can provide a scientific basis for the study of soil and water processes in small peak-cluster depression watershed of the karst region.

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