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Impact of Patchy Vegetation on Tsunami Dynamics
| 题名： | Impact of Patchy Vegetation on Tsunami Dynamics |
| 其他题名： | Anderson,M.E.,and Smith,J.(2014)."Wave attenuation by flexible,idealized salt marsh vegetation."Coastal Eng.,83,82–92. |
| 正文语种： | 英文 |
| 作者： | Yongqian Yang |
| 关键词： | Tsunami;Patchy vegetation;Experiment;Boussinesq model;Momentum flux;Run-up |
| 摘要： | Coastal vegetation is capable of mitigating tsunami damage. Yet, the complex tsunami dynamics induced by spatial variability of onshore vegetation are not well understood at present. Laboratory and numerical investigations were conducted to study the impact of patchy vegetation on tsunami dynamics. Roughness patches composed of various cylinder numbers and spacings represented different bulk vegetative conditions in the experiments, and a Boussinesq model was applied to extend the range of the experiments. Analysis revealed that roughness patches reduced the maximum momentum flux by up to 80％ over most areas, whereas within-patch roughness variation induced uncertainty on hydrodynamics adjacent to the seaward patches. Dimensional analysis revealed a logarithmic relation between the area protected from extreme momentum flux and the total roughness area. These findings demonstrate that patchy vegetation, with appropriate configuration, can be as effective as a continuous forest belt in mitigating tsunami hazards. |
| 出版年： | 2017 |
| 论文唯一标识： | P-108Y2017V143N04004 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)WW.1943-5460.0000380 |
| 期刊名称： | Journal of Waterway, Port, Coastal, and Ocean Engineering |
| 拼音刊名(出版物代码)： | P-108 |
| 卷： | 143 |
| 期： | 04 |
| 页码： | 31-46 |
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