CIRCULATION PATTERNS AND SHORELINE RESPONSE INDUCED BY SUBMERGED BREAKWATERS

Proceedings of the International Conference on Coastal Engineering

Marcel J.F Stive¹  Judith Bosboom¹  Mara Villani²  Marcel Zijlema¹ 

[1] Delft University of Technology;University of Rome La Sapienza

关键词: coastal defence;    submerged breakwaters;    coastal currents;    design criterion;   

DOI  :  10.9753/icce.v33.structures.25

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

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.

【 授权许可】

Unknown