Exploring the effects of weather-driven dynamics of desiccation cracks on hydrological process of expansive clay slope: Insights from physical model test
文献类型：期刊论文
| 作者 | Luo, Yi3; Hou, Xinyu3; Zhang, Jiaming3; Wang, Yujie3; Hu, Mingjian2; Jiang, Guosheng3; Tang, Chao-Sheng1 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2025-08-01 |
| 卷号 | 656页码:16 |
| 关键词 | Expansive clay Desiccation cracks Preferential flow Slope hydrology Weather-driven crack dynamics |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2025.133011 |
| 英文摘要 | Desiccation cracks, serving as preferential pathways for both water evaporation and infiltration, are critical to the hydrological processes governing the stability of expansive clay slopes. However, the desiccation crack dynamics under drying-wetting cycles strongly influence the preferential pathways for water movement. The effects of such weather-driven crack dynamics on slope hydrology remain unclear. To address this gap, a non-failure slope model test was conducted under multiple drying-wetting cycles. Crack metrics (crack ratio, aperture, connectivity, depth), hydrological responses (volumetric water content, matric suction) and slope water balance components (evaporation, runoff, discharge) were measured to investigate the interplay between crack dynamics and slope hydrology. The findings revealed that during drying, evaporation-driven soil shrinkage rapidly expands cracks until the shrinkage limit, followed by temperature-driven "crack breathing," causing 2 % crack ratio fluctuations within a 10 degrees C range. Desiccation cracks facilitate fast evaporation within the crack depth but has minimal impact below it. During wetting, deep primary desiccation cracks are the leading pathways for preferential flow even when they are in closing, while the shallow small cracks help retain surface runoff in the surface matrix, slowing deep soil saturation by reducing preferential flow. For expansive clay with dynamic cracks, heavy rainfall after prolonged drought enhances preferential flow, while short-interval rainfall weakens it. Weather-driven crack dynamics have a dual effect on slope water balance: during intense drying, crack development initially promotes slope discharge through preferential evaporation but later limit evaporation. Similarly, during wetting, crack closure initially reduces preferential flow and thus slope water storage, but the decreased aperture and connectivity of crack networks concurrently reduce the slope discharge capacity, potentially increasing slope water storage and impacting slope stability. Our research highlights the need for incorporation of desiccation crack dynamics into hydrological models to quantify such dual effect on slope stability. |
| 资助项目 | National Natural Science Foundation of China[42407204] ; National Natural Science Foundation of China[42177166] ; National Natural Science Foundation of China[42230715] ; National Natural Science Foundation of China[41925012] ; National Natural Science Foundation of China[42230710] ; Postdoctoral Fellowship Program of CPSF[GZC20232473] ; China Postdoctoral Science Foundation Funded Project[2024M763062] ; Hubei Postdoctoral Innovation Talent Support Project[2024HBBHCXA088] ; Fundamental Research Founds for National University, China University of Geosciences (Wuhan) ; Plan of Anhui Province Transport Technology Progress[2018030] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001442572700001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36448]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhang, Jiaming; Tang, Chao-Sheng |
| 作者单位 | 1.Nanjing Univ, Sch Earth Sci & Engn, 163 Xianlin Rd, Nanjing 210023, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.China Univ Geosci Wuhan, Fac Engn, 388 Lumo Ave, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo, Yi,Hou, Xinyu,Zhang, Jiaming,et al. Exploring the effects of weather-driven dynamics of desiccation cracks on hydrological process of expansive clay slope: Insights from physical model test[J]. JOURNAL OF HYDROLOGY,2025,656:16. |
| APA | Luo, Yi.,Hou, Xinyu.,Zhang, Jiaming.,Wang, Yujie.,Hu, Mingjian.,...&Tang, Chao-Sheng.(2025).Exploring the effects of weather-driven dynamics of desiccation cracks on hydrological process of expansive clay slope: Insights from physical model test.JOURNAL OF HYDROLOGY,656,16. |
| MLA | Luo, Yi,et al."Exploring the effects of weather-driven dynamics of desiccation cracks on hydrological process of expansive clay slope: Insights from physical model test".JOURNAL OF HYDROLOGY 656(2025):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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