The Role of Dynamic Seepage Response in Sediment Transport and Tsunami-Induced Scour
文献类型：期刊论文
| 作者 | Hu ZY(户政宇)1; Qi WG(漆文刚)2,3 ; Li, Yuzhu Pearl1
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 130期号:3页码:e2024JC021084 |
| 关键词 | tsunamis sediment transport seepage effect scour computational fluid dynamics hydrodynamic and morphological modeling |
| ISSN号 | 2169-9275 |
| DOI | 10.1029/2024JC021084 |
| 英文摘要 | Tsunamis have long been recognized to destabilize the seabed by causing severe erosion and potential liquefaction. However, the effect of the dynamic seepage response induced by tsunami loading on sediment transport remains elusive. Here, we explicitly quantify the role and mechanics of seepage response in field-scale tsunami-induced bed mobility and scour through theoretical analyses and fully coupled hydrodynamic and morphological simulations. The increased hydraulic gradient can lower the onset threshold of the sediment motion, thus facilitating sediment transport. In the meantime, it can also curtail the fluid-sediment momentum transfer, consequently weakening sediment transport. The competing effects of seepage response on the onset threshold and fluid agitation are such that the seepage response during the depression wave does not necessarily increase bed mobility. The suspended load transport can dominate the near-field scour processes, as demonstrated with the scour beneath a submarine pipeline. The seabed suction response to the elevation wave shows insignificant effects on the continuous exchange between the suspended load and bed load, although it inhibits the near-bed sediment concentration. The seabed injection response to the depression wave induces more bed load particles to be entrained into the water column, contributing to the increased concentration. This results in increased sediment transport and exacerbated scour, especially for the bed liquefaction scenario. The seepage response plays a critical role in the spatiotemporal variations of the seabed morphology and the sediment suspension. The outcomes significantly update the knowledge about the role of seepage in the progress of tsunami-induced sediment transport and scour. |
| 分类号 | 一类 |
| WOS研究方向 | Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001449755600001 |
| 资助机构 | The first author thanks Dr. Weilin Chen for his helpful advice. We would like to thank the anonymous reviewers for their constructive suggestions. This research is supported by the Ministry of Education, Singapore, under the MOE AcRF Tier 2 project POSEIDON: Predicting cOaStal brEakIng waves with advanced Data-driven turbulence mOdelliNg. This study is partly supported by computational resources provided by the National Supercomputing Centre, Singapore (), under Project ID: 11002459. |
| 其他责任者 | Li, Yuzhu Pearl |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/101468]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.National University of Singapore; 2.Institute of Mechanics, CAS; 3.University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | Hu ZY,Qi WG,Li, Yuzhu Pearl. The Role of Dynamic Seepage Response in Sediment Transport and Tsunami-Induced Scour[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2025,130(3):e2024JC021084. |
| APA | 户政宇,漆文刚,&Li, Yuzhu Pearl.(2025).The Role of Dynamic Seepage Response in Sediment Transport and Tsunami-Induced Scour.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,130(3),e2024JC021084. |
| MLA | 户政宇,et al."The Role of Dynamic Seepage Response in Sediment Transport and Tsunami-Induced Scour".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 130.3(2025):e2024JC021084. |
入库方式： OAI收割
来源：力学研究所
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