复合型海滩的极端洪水统计
Extreme Inundation Statistics on a Composite Beach
摘要：
基于非线性浅水方程组，采用直接数值模拟方法研究了初始高斯窄带和宽带波场的爬高及其统计特性。水深由等深剖面组成，与等坡海滩相匹配。为了解决不同程度的非线性，时间序列与五个不同的显着波高被认为是。选定的波浪参数还允许看到波浪破碎对波浪统计的影响。每个模拟时间序列的总物理时间为1000小时（约360000个波周期）。从波浪非线性、波浪破碎和入射波场带宽的角度讨论了波浪爬高的统计特性。提出了条件威布尔分布作为描述极端爬高和评估极端洪水的模型。
英文摘要：
The runup of initial Gaussian narrow-banded and wide-banded wave fields and its statistical characteristics are investigated using direct numerical simulations, based on the nonlinear shallow water equations. The bathymetry consists of the section of a constant depth, which is matched with the beach of constant slope. To address different levels of nonlinearity, the time series with five different significant wave heights are considered. The selected wave parameters allow also seeing the effects of wave breaking on wave statistics. The total physical time of each simulated time-series is 1000 hours (~360000 wave periods). The statistics of calculated wave runup heights are discussed with respect to the wave nonlinearity, wave breaking and the bandwidth of the incoming wave field. The conditional Weibull distribution is suggested as a model for the description of extreme runup heights and assessment of extreme inundations.
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