Increase in overtopping rate caused by local gust-winds during the passage of a typhoon
Increase in overtopping rate caused by local gust-winds during the passage of a typhoon
复制标题
台风过境期间局部阵风造成的越顶率增加
DOI：
10.1080/21664250.2022.2027090
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发表时间：
2022
影响因子：
2.4
通讯作者：
Kyaw Thit Oo
中科院分区：
文献类型：
--
作者：
Inagaki Naoto;Shibayama Tomoya;Takabatake Tomoyuki;Esteban Miguel;Maell Martin;Kyaw Thit Oo
日本东京湾福仓海岸的一项实地调查显示，2019年台风法赛过境期间，势头可观的海浪造成显著的漫浪，导致海防结构性破坏和局部洪水泛滥。使用第三代海浪模型后推的海浪高度不足以解释福村海岸局部破坏的程度，这可能是因为这种方法没有考虑到台风经过期间记录的强风。为了解决这些问题，基于有限体积法(FVM)和流体体积法(VOF)，发展了一种新的考虑空气和水动力相互作用的数值模型。尽管该模型仍然略微低估了不同作者之前进行的实验中的测量值，但在估计强风下的溢流率时，它比现有的方法要好。然后将该模式应用于福村海岸的一个实际尺度模式，通过考虑41m/S的强风风速，作者能够解释所发生的现象。
A field survey of Fukuura Coast (in Tokyo Bay, Japan) revealed during the passage of Typhoon Faxai in 2019 waves with considerable momentum caused significant wave overtopping, resulting in structural damage to coastal defenses and localized flooding. The hindcasted wave height using a third-generation wave model was not high enough to explain the extent of the local damage at Fukuura Coast, likely due to such methods failing to take into account the strong gust-winds recorded during the passage of the typhoon. To solve such problems the authors developed a new numerical model that takes into account the dynamic interaction of air and water, based on the finite volume method (FVM) and the volume of fluid method (VOF). Although this model still slightly underestimates the measurements in the experiments previously conducted by different authors, it is better than existing methods when estimating the overtopping rates under strong winds. The model was then applied to a real-scale model of Fukuura Coast, where by taking into account strong gust-wind speed of 41 m/s the authors were able to explain the phenomena that took place.