堤顶上过顶波流动特性的变化

IF 4.5 2区 工程技术 Q1 ENGINEERING, CIVIL
Niels van der Vegt , Jord J. Warmink , Bas Hofland , Vera M. van Bergeijk , Suzanne J.M.H. Hulscher
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引用次数: 0

摘要

在严重的风暴期间,海浪可以超过堤坝,导致波峰和向陆斜坡的侵蚀,最终可能导致决口。为了准确地模拟这种侵蚀,需要以与时间相关的方式描述每个单独的波浪过顶事件的过顶流。在这种情况下,峰值流速(upeak)和峰值流厚(hpeak)是关键的边界条件。先前的研究表明,这些流动特征与过顶体积有关,但通常提出的确定性模型忽略了这些特征之间的可变性和相互依赖性。本研究的目的是通过明确量化upeak和hpeak的变化和相互依赖性来解决这些差距,使用小规模FlowDike实验的数据。我们提出了广义分布来描述这些流动特性的变化,根据水侧坡角,峰值变化为13%至23%,峰值变化约为20%。此外,upeak和hpeak之间的相互依赖关系使用Student-t copula (ν=9.361, ρ= - 0.497)进行建模,显示出适度的负相关。这表明,峰值高的过顶事件不太可能有一个大的峰值,反之亦然。本研究结果可以直接应用于改进描述由过顶波引起的荷载和由此产生的侵蚀的模型。通过结合峰值和峰值的变化和相互依赖性,这些模型可以更详细地表示过顶波的峰值流动特征。此外,这些见解可以应用于波浪过顶模拟器的设计,通过结合更多的自然变化,可以模拟更真实的过顶流。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Variation in flow characteristics of overtopping waves on dike crests
During severe storms, waves can overtop dikes, leading to erosion of the crest and landward slope, which may ultimately result in breaching. To accurately model this erosion, the overtopping flow needs to be described in a time-dependent manner for each individual wave overtopping event. The peak flow velocity (upeak) and peak flow thickness (hpeak) are critical boundary conditions in this context. Previous studies have shown that these flow characteristics are related to the overtopping volume, yet often propose deterministic models that overlook the variability and interdependency between these characteristics.
The goal of this study is to address these gaps by explicitly quantifying the variation and interdependence of upeak and hpeak, using data from small-scale FlowDike experiments. We propose generalized distributions to describe the variation in these flow characteristics, with upeak varying by 13% to 23%, depending on the waterside slope angle, and hpeak varying by approximately 20%. Furthermore, the interdependency between upeak and hpeak is modeled using a Student-t copula (ν=9.361, ρ=0.497), revealing a moderate negative correlation. This suggests that overtopping events with a high upeak are less likely to have a large hpeak, and vice versa.
The findings of this study can be directly applied to improve models that describe the loading caused by overtopping waves and the resulting erosion. By incorporating the variation and interdependence of upeak and hpeak, these models can provide a more detailed representation of the peak flow characteristics of overtopping waves. Furthermore, these insights can be applied to the design of wave overtopping simulators, enabling the simulation of more realistic overtopping flows by incorporating more of their natural variation.
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来源期刊
Coastal Engineering
Coastal Engineering 工程技术-工程:大洋
CiteScore
9.20
自引率
13.60%
发文量
0
审稿时长
3.5 months
期刊介绍: Coastal Engineering is an international medium for coastal engineers and scientists. Combining practical applications with modern technological and scientific approaches, such as mathematical and numerical modelling, laboratory and field observations and experiments, it publishes fundamental studies as well as case studies on the following aspects of coastal, harbour and offshore engineering: waves, currents and sediment transport; coastal, estuarine and offshore morphology; technical and functional design of coastal and harbour structures; morphological and environmental impact of coastal, harbour and offshore structures.
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