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Wave dissipation by vegetation with layer schematization in SWAN
Suzuki, T.; Zijlema, M.; Burger, B.; Meijer, M.C.; Narayan, S. (2011). Wave dissipation by vegetation with layer schematization in SWAN. Coast. Eng. 59(1): 64-71. http://hdl.handle.net/10.1016/j.coastaleng.2011.07.006
In: Coastal Engineering: An International Journal for Coastal, Harbour and Offshore Engineers. Elsevier: Amsterdam; Lausanne; New York; Oxford; Shannon; Tokyo. ISSN 0378-3839; e-ISSN 1872-7379, meer
Peer reviewed article  

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Trefwoorden
    Golfverspreiding; Modellen; Vegetatie; Marien
Author keywords
    Vegetation; Wave dissipation; SWAN; Bulk drag coefficient; Layer model;Vegetation factor

Auteurs  Top 
  • Suzuki, T.
  • Zijlema, M.
  • Burger, B.
  • Meijer, M.C.
  • Narayan, S.

Abstract
    The energy of waves propagating through vegetation is dissipated due to the work done by the waves on the vegetation. Dalrymple et al. (1984) estimated wave dissipation by integrating the force on a cylinder over its vertical extent. This was extended by Mendez and Losada (2004) to include varying depths and the effects of wave damping due to vegetation and wave breaking for narrow-banded random waves. This paper describes the wave dissipation over a vegetation field by the implementation of the Mendez and Losada formulation in a full spectrum model SWAN, with an extension to include a vertical layer schematization for the vegetation. The present model is validated with the original equation and results from Mendez and Losada (2004). The sensitivity of the model to the shape of the frequency spectrum, directional spreading and layer schematization are investigated. The model is then applied to field measurements by using a vegetation factor. This model has the ability to calculate two-dimensional wave dissipation over a vegetation field including some important aspects such as breaking and diffraction as used in SWAN model.

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