Wave dissipation by vegetation with layer schematization in SWAN: Fid-Bau Portal

Wave dissipation by vegetation with layer schematization in SWAN

Suzuki, Tomohiro / Zijlema, Marcel / Burger, Bastiaan / Meijer, Martijn C. / Narayan, Siddharth

Abstract The energy of waves propagating through vegetation is dissipated due to the work done by the waves on the vegetation. estimated wave dissipation by integrating the force on a cylinder over its vertical extent. This was extended by 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 . 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.

Highlights ► Mendes and Losada (2004) for wave dissipation by vegetation implemented in SWAN. ► Model validated against field and experimental data. ► Full spectrum 2DH wave damping by vegetation with layer schematization enabled.