Document Type

Conference Paper

Publication Date

2017

Publication Title

Coastal Engineering Proceedings

Volume

1

Issue

35

Pages

waves.32

Conference Name

35th Conference on Coastal Engineering, 17 November-20 November, 2016, Antalya, Turkey

Abstract

Coastal wetlands are among the natural features with the capability to dissipate wave energy and reduce storm damage. Inadequate representation of wave and vegetation characteristics in numerical models may reduce their capability in predicting wave processes over wetlands. Previous numerical wave models have typically applied simplifications on vegetation behavior. For instance, vegetation stems were usually assumed to be rigid or semi-flexible and thus extreme stem deflections could not be captured. In this study, a time-domain nonlinear numerical model based on extended Boussinesq formulation is developed and coupled with a numerical model for vegetation blade dynamics that allows for arbitrary flexibility. Comparison with analytical and laboratory experiments show that the coupled model can adequately predict flow as well as vegetation blade dynamics without the need for any parameter tuning. The model is then used to obtain wave-induced forces on a stem and vegetation blade orientation. Model results indicate that the variation of the vegetative drag coefficient with wave frequency is non-monotonic.

Rights

© 2017 Tahvildari.

Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.

ORCID

0000-0001-9922-129X (Tahvildari)

Original Publication Citation

Tahvildari, N. (2017). Numerical modeling of the interactions between nonlinear waves and arbitrarily flexible vegetation. Coastal Engineering Proceedings, 1(35), waves.32. https://doi.org/10.9753/icce.v35.waves.32

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