Circulation patterns and shoreline response induced by submerged breakwaters
Circulation patterns and shoreline response induced by submerged breakwaters
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水下防波堤引起的环流模式和海岸线响应
DOI：
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发表时间：
2012
期刊：
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通讯作者：
M. Stive
中科院分区：
文献类型：
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作者：
M. Villani;J. Bosboom;M. Zijlema;M. Stive
用于海岸防御的与海岸平行的水下防波堤（以下简称SBWs）是减轻海浪对海岸影响的需要与确保景观和水质保护的雄心之间的一个很好的折衷方案。然而，如果设计不当，这样的结构会迫使环流模式加剧海岸线侵蚀，而不是海岸线增生。数值模型可以用来研究结构引起的环流模式和由此产生的海岸线响应。然而，由于计算要求高，这些模型最适合设计过程的高级阶段。本文的目的是提出一个简单的标准，以定性地确定在构造的背风处是否可能出现增生或侵蚀环流模式。该标准基于分析考虑，并建立在Bellotti（2004,2007）提出的模型上。通过非流体静力自由表面数值模型SWASH （Zijlema et al. 2011）和Haller et al.（2002）进行的实验进行了验证。验证表明，建议的分析模型能够为SBW设计提供潜在海岸线响应模式的快速首次评估。
Submerged shore-parallel breakwaters for coastal defence (henceforth SBWs) are a good compromise between the need to mitigate the effects of waves on the coast and the ambition to ensure the preservation of the landscape and water quality. However, if not properly designed, such structures can force circulation patterns that enhance shoreline erosion rather than shoreline accretion. Numerical models can be used to investigate the structure-induced circulation patterns and the resulting shoreline response. However, being computationally demanding these models are most suitable for advanced stages of the design process. The aim of this paper is to present a simple criterion to qualitatively identify whether an accretive or erosive circulation pattern can be expected in the lee of the structures. The criterion is based on analytical considerations and builds on the model presented by Bellotti (2004, 2007). It is validated against the non-hydrostatic free surface numerical model SWASH (Zijlema et al. 2011) and experiments performed by Haller et al. (2002). The validation indicates that the proposed analytical model is capable of providing a rapid first assessment of the potential shoreline response mode for SBW design.