Zhang Xianlin,Feng Mengdie,He Binghui,et al.Soil Infiltration Characteristics and Suitable Models Under Different Land Use Types in Karst Trough-Valley Region[J].Research of Soil and Water Conservation,2024,31(04):34-41.[doi:10.13869/j.cnki.rswc.2024.04.021]
喀斯特槽谷区不同土地利用方式下土壤入渗特征及适宜模型
- Title:
- Soil Infiltration Characteristics and Suitable Models Under Different Land Use Types in Karst Trough-Valley Region
- 文章编号:
- 1005-3409(2024)04-0034-08
- Keywords:
- karst; land-use type; soil physical and chemical properties; infiltration characteristics; regression model
- 分类号:
- S152.7
- 文献标志码:
- A
- 摘要:
- [目的]探究喀斯特槽谷区不同土地利用方式下土壤入渗规律,提出适合喀斯特槽谷区的土壤入渗模型。[方法]以喀斯特槽谷区4种典型土地利用类型(林地、草地、耕地、园地)为研究对象,分析不同土地利用类型土壤入渗特征差异及影响因素,评价了Horton,Kostiakov和Philip这3种常见入渗模型在该区的适应性。[结果](1)不同土地利用类型土壤容重、含水率和电导率存在显著差异(p<0.05),耕地土壤容重(1.1 g/cm3)、含水率(26.9%)以及电导率(75.43 mS/cm)低于其他土地利用类型,园地土壤容重(1.32 g/cm3)、林地含水率(35.02%)以及草地电导率(164.6 mS/cm)分别高于其他土地利用类型。(2)不同土地利用类型土壤入渗过程均表现为迅速下降、缓慢下降以及趋于稳定。(3)Horton模型、Kostiakov模型和Philip模型对喀斯特槽谷区不同土地利用方式拟合结果存在差异,其中,Horton模型结果最优,拟合度R2达到0.922～0.951,Philip模型拟合结果最差,拟合度R2为0.754～0.908。(4)pH值与初始入渗速率和平均入渗速率呈极显著正相关关系(p<0.01),与稳定入渗速率呈显著正相关关系(p<0.05); 0.05～0.25 mm和<0.05 mm微团聚体分别与稳定入渗率和平均入渗率呈显著正相关和负相关(p<0.05)。多元线性回归模型表明,容重、含水率以及<0.05 mm微团聚体是主要影响入渗速率的因子,且与入渗性能指标存在负相关关系。[结论]不同土地利用方式下耕地具有更好的渗透性能,Horton模型更适合模拟喀斯特槽谷区土壤入渗,研究结果可为喀斯特槽谷区土壤入渗性能评估及植被配置等提供科学依据。
- Abstract:
- [Objective]The aims of this study are to investigate the soil infiltration patterns under different land uses in karst trough valley and to propose a suitable soil infiltration model for karst trough valley. [Methods]Four typical land uses(forest, grassland, cropland and orchard)in the karst trough valley were taken as the research objects to determine the differences in soil infiltration characteristics and influencing factors as affected by different land uses, and to evaluate the adaptability of three common infiltration models:Horton, Kostiakov and Philip, the in this area. [Results](1)Soil bulk density, water content and electrical conductivity were markedly different among different land uses(p<0.05). Soil bulk density(1.1 g/cm3), water content(26.9%)and electrical conductivity(75.43 mS/cm)in cropland were lower than those in other land uses. Soil bulk density(1.32 g/cm3)in orchard, water content in forest(35.02%)and electrical conductivity in grassland(164.6 mS/cm)were higher than those in other land uses, respectively.(2)The infiltration process of different land use types showed rapid decline, slow decline and stabilization.(3)There were differences in the fitting results of Horton model, Kostiakov model and Philip model for different land use modes in karst trough valley. Horton model had the best results, with the fit R2 reaching 0.922～0.951, and Philip model had the worst results, with the fit R2 ranging from 0.754 to 0.908.(4)The pH value was highly significantly positively correlated with initial infiltration rate and average infiltration rate(p<0.01)and significantly positively correlated with stable infiltration rate(p<0.05); 0.05～0.25 mm and <0.05 mm fractions of micro-aggregates were significantly positively and negatively correlated with stable infiltration rate and average infiltration rate, respectively(p<0.05). The multiple linear regression model showed that soil bulk density, water content and <0.05 mm fraction of micro-aggregates were the main factors influencing infiltration rate, which had an inhibitory effect on infiltration. [Conclusion]Cropland has better infiltration performance among different land uses, and the Horton model is more suitable for modeling soil infiltration in karstic troughs and valleys. The results of the study can provide a scientific basis for the assessment of soil infiltration performance and vegetation allocation in karst trough valley areas.
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备注/Memo
收稿日期:2023-05-19 修回日期:2023-09-13
资助项目:国家重点研发计划项目课题(2022YFF1302903); 西南大学先导计划(SWU-XDZD22003)
第一作者:张贤林(2001—),男,四川南充人,硕士研究生,研究方向为土壤侵蚀与流域治理。E-mail:zxl001208@163.com
通信作者:何丙辉(1966—),男,湖南汨罗人,博士,教授,主要从事土壤侵蚀与水土保持、森林培育与林业生态工程研究。E-mail:hebinghui@swu.edu.cn