波浪诱发的植被内湍流的纵向和垂直演变

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Coastal Engineering Pub Date : 2025-02-26 DOI:10.1016/j.coastaleng.2025.104737

Yunshuo Cheng , Zhong Peng , Yuan Xu , Ying Zhao , Qing He

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引用次数: 0

摘要

盐沼植被在沿海环境中提供了必要的形态动力学和生态效益，但对植被中波浪诱导湍流的动力学仍然知之甚少。通过室内实验，揭示了非破碎波和破碎波对植被内波浪湍流的纵向和垂直演化。来自非破碎中间波的数据强调了植被纵向湍流强度的非线性行为，特别是在高茎密度的情况下。提出了一种修正的模型来解释植被前缘湍流尺度增加和局地波轨道速度降低之间的竞争。对于破碎波，视频记录中的气泡云和测量到的湍流强度一起量化了植被在缓冲波浪引起的湍流垂直演变中所起的关键作用，从而减少了近床湍流。这些发现对于理解植被在塑造海岸形态动力学和维持生态系统健康方面的作用至关重要，对海岸管理和恢复工作具有广泛的意义。

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Longitudinal and vertical evolution of wave-induced turbulence within vegetation

Salt marsh vegetation provides essential morphodynamic and ecological benefits in coastal environments, yet the dynamics of wave-induced turbulence within vegetation remain poorly understood. Laboratory experiments are carried out to reveal the longitudinal and vertical evolution of wave-induced turbulence within vegetation for both non-breaking and breaking waves. Data from non-breaking intermediate waves highlights a nonlinear behavior of the longitudinal turbulent intensity across the vegetation, especially with high stem densities. A modified model is developed to account for the competition between increased turbulence scaling and reduced local wave orbital velocity at the leading edge of vegetation. For breaking waves, bubble clouds in video records and measured turbulence intensity together quantify vegetation's crucial role in buffering the vertical evolution of wave-induced turbulence and consequently reducing near-bed turbulence. Findings are crucial for understanding vegetation's role in shaping coastal morphodynamics and maintaining ecosystem health, with broad implications for coastal management and restoration efforts.

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来源期刊

Coastal Engineering 工程技术-工程：大洋

CiteScore

9.20

自引率

13.60%

发文量

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.