Standing longwave formations in reef-lagoon bathymetries
Standing longwave formations in reef-lagoon bathymetries
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DOI：
10.1016/j.coastaleng.2021.103949
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发表时间：
2021-09
影响因子：
4.4
通讯作者：
Vivek A. Bheeroo;H. Yeh
中科院分区：
文献类型：
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作者：
Vivek A. Bheeroo;H. Yeh
常设长波地层的研究中存在的一个广泛的淹没窗台关闭垂直反射墙：这种配置代表了珊瑚礁礁海岸经常存在的珊瑚礁泻湖地层的模型。一系列的实验室和数值实验进行的波的波长是可比的测深长度尺度。结果表明，反射边界墙处的波振幅可以超过没有生物礁的情况。当波浪大于礁宽时，在礁泻湖跨度中也观察到不利的波浪条件。在泻湖内部可以看到波浪的高次谐波的增强。目前的实验结果突出了潜在的离岸礁的存在可能会恶化的波浪气候在近岸地区的情况下，站在长波地层的礁后面。然而，珊瑚礁的影响区域局限于泻湖和反射壁的范围，而离岸驻波形成的影响仍然很小，除了在驻波包络的相移。
Standing longwave formations are investigated in the presence of a broad submerged sill off the vertical reflective wall: this configuration represents a model of reef-lagoon formations often present in coral-reef coasts. A series of laboratory and numerical experiments are performed for the waves of which wavelengths are comparable to the bathymetry length scale. The results reveal that the wave amplitude at the reflective boundary wall can surpass the case without the presence of the reef. Adverse wave conditions are also observed in the reef-lagoon span when the waves are longer than the reef breadth. Enhancement of the higher harmonics of the waves is seen inside the lagoon. The present experimental results highlight the potential that the presence of an offshore reef could worsen the wave climate in the nearshore region behind the reef for the case of standing longwave formations. The zone of influence of the reef is however localized to the lagoon and the reflective wall extent, while the offshore standing wave formation remains minimally influenced except for the phase shift in the standing-wave envelope.