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| DOI | 10.1029/2023JC020689 |
| Large-Scale Physical Modeling of Wave Generation and Runup on Slopes From the Collapse of Partially and Fully Submerged Granular Columns | |
| 发表日期 | 2024 |
| ISSN | 2169-9275 |
| EISSN | 2169-9291 |
| 起始页码 | 129 |
| 结束页码 | 5 |
| 卷号 | 129期号:5 |
| 英文摘要 | Climate change is making coastal regions increasingly vulnerable to hazards, including rapid subaerial and submarine landslides, which can result in catastrophic tsunamis. Due to the complex geomechanics of failure, limited physical modeling studies have been conducted that encompass the entire problem including the triggering of granular landslides, the waves generated by partially and fully submerged mass failures, and the runup of these waves on local and distal slopes. In the present study, for the first time, waves in both the seaward direction (in the direction of failure for both submarine and partially submerged slides) and the landward direction (opposing the direction of failure only for submarine slides) are investigated during morphological evolution of the granular material. A series of large-scale experiments are conducted under varying levels of submergence in water by releasing columns of gravel-sized material into a range of different reservoir depths. This is accomplished using a pneumatically actuated vertical lift gate designed specifically for these experiments. The wave amplitudes measured in the seaward direction agree with empirical relationships developed in a previous study using smaller-scale models, and a new analytical solution relating the column submergence to the trough-led wave amplitudes in landward direction is presented. These novel predictions of wave amplitude and runup in both the seaward and landward directions indicate strong dependence of the wave behavior on the submergence depth and granular properties, improving our understanding of tsunamis generated by mass failures in coastal regions. Landslides can occur from above water or underwater, and both types can generate hazardous waves. Climate change is destabilizing slopes and causing more landslides into water, and there is a need to study how these waves form and how they impact coastal areas in detail. In the present study, a series of large-scale laboratory flume experiments are conducted to examine this problem by measuring waves with digital cameras and probes. The experiments each begin with a vertical column of gravel-sized particles that are released by rapidly opening a gate specifically designed for this research. The collapse of the granular material generates waves in the forward direction (seaward) and in the backward direction (landward) and both waves also cause runup on slopes at each end of the flume. Different column heights and water depths are tested to obtain results over a wide range of conditions. Based on the measurements, the results agree with previous studies that used smaller-scale models, and a new equation for calculating the wave size in the landward direction behind the failure (landward direction) is presented. The results are useful for understanding tsunamis generated by both submerged and partially submerged landslides into water. A new rapid vertical release gate system is designed to experimentally generate tsunami from large-scale granular collapse For the first time, the amplitude and runup of waves in both the seaward direction and the landward direction are investigated A new momentum-based relationship is developed to predict the landward wave amplitude that impacts local coastal regions |
| 英文关键词 | tsunami; mass failures; submarine landslides; flume experiments |
| 语种 | 英语 |
| WOS研究方向 | Oceanography |
| WOS类目 | Oceanography |
| WOS记录号 | WOS:001231727000001 |
| 来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/294951 |
| 作者单位 | Queens University - Canada; Queens University - Canada; Queens University - Canada; Queens University - Canada |
| 推荐引用方式 GB/T 7714 | . Large-Scale Physical Modeling of Wave Generation and Runup on Slopes From the Collapse of Partially and Fully Submerged Granular Columns[J],2024,129(5). |
| APA | (2024).Large-Scale Physical Modeling of Wave Generation and Runup on Slopes From the Collapse of Partially and Fully Submerged Granular Columns.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,129(5). |
| MLA | "Large-Scale Physical Modeling of Wave Generation and Runup on Slopes From the Collapse of Partially and Fully Submerged Granular Columns".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 129.5(2024). |
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