层间裂隙对喀斯特坡面径流特征的影响：模拟降雨实验的启示

IF 6.3 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology Pub Date : 2025-10-13 DOI:10.1016/j.jhydrol.2025.134415

Hang Yang, Ya Luo, Qiuwen Zhou, Ze Yuan, Chunmao Shi, Yuan Li

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引用次数: 0

摘要

喀斯特坡面土层浅，地表-地下水水文响应快，径流特征复杂。虽然以前的研究已经研究了地表径流、土壤-表层岩溶界面径流和喀斯特斜坡的表层岩溶径流，但它们在很大程度上忽略了岩层之间的侧向溶解裂缝（interlayer裂隙[ISFs]）对径流特征的影响。本研究通过室内控制实验模拟了ISFs的数量和厚度，分析了ISFs对喀斯特坡面径流过程的影响。结果表明，在没有ISFs的情况下，垂直溶蚀裂隙径流（35% ~ 52%）是径流的主要组成部分。然而，随着isf数量的增加，层间裂隙径流逐渐成为主要的径流成分（20% - 78%），地表径流的发生被推迟。ISFs的存在显著减少了垂直溶蚀裂隙的径流。此外，ISFs数量与土壤-表层岩溶界面径流和层间裂隙径流分别呈显著的负相关和正相关（p < 0.05）。这些发现突出了isf在喀斯特坡面径流过程中的关键调节作用，并强调了层间裂隙径流是喀斯特坡面径流的关键组成部分。

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Influence of interlayer fissures on runoff characteristics of karst slopes: insights from simulated rainfall experiments

Karst slopes are characterized by shallow soil layers and a rapid surface–groundwater hydrological response, leading to complex runoff characteristics. While previous studies have examined surface runoff, soil-epikarst interfacial runoff, and epikarst runoff in karst slopes, they have largely overlooked the effect of lateral dissolution fissures between rock layers (interlayer fissures [ISFs]) on runoff characteristics. In this study, we simulated the number and thickness of ISFs through an indoor controlled experiment and then analyzed the influence of ISFs on karst slope runoff processes. The results indicate that in the absence of ISFs, the vertical dissolution fissure runoff (35 %–52 %) is the primary runoff component. However, as the number of ISFs increases, the interlayer fissure runoff gradually becomes the primary runoff component (20 %–78 %) and the onset of surface runoff is delayed. The presence of ISFs significantly reduces the runoff through vertical dissolution fissures. In addition, the number of ISFs is significantly negatively and positively correlated with the soil-epikarst interfacial runoff and interlayer fissure runoff, respectively (p < 0.05). These findings highlight the critical regulatory role of ISFs in karst slope runoff processes and underscore interlayer fissure runoff as a key component of runoff on karst slopes.

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来源期刊

Journal of Hydrology 地学-地球科学综合

CiteScore

11.00

自引率

12.50%

发文量

1309

审稿时长

7.5 months

期刊介绍： The Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology and hydrogeology. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, hydraulics, agrohydrology, geomorphology, soil science, instrumentation and remote sensing, civil and environmental engineering are included. Social science perspectives on hydrological problems such as resource and ecological economics, environmental sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site.