QUASI-3D MODELLING OF SURF ZONE DYNAMICS

Arjen Luijendijk; Johan Henrotte; Dirk Jan Walstra; Maarten van Ormondt

doi:10.9753/icce.v32.currents.52

No. 32 (2010), Swash, Nearshore Currents, and Long Waves

No. 32 (2010)

QUASI-3D MODELLING OF SURF ZONE DYNAMICS

Swash, Nearshore Currents, and Long Waves

https://doi.org/10.9753/icce.v32.currents.52

Published 2011-01-26

Arjen Luijendijk⁺⁻
Johan Henrotte⁺⁻
Dirk Jan Walstra⁺⁻
Maarten van Ormondt⁺⁻

Arjen Luijendijk

Deltares

Johan Henrotte

DHV

Dirk Jan Walstra

Deltares / Delft University of Technology

Maarten van Ormondt

Deltares

Proceedings of the 32nd International Conference

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Keywords

quasi-3d modelling
surf zone
coastal modelling
nearshore morphodynamics

How to Cite

Luijendijk, A., Henrotte, J., Walstra, D. J., & van Ormondt, M. (2011). QUASI-3D MODELLING OF SURF ZONE DYNAMICS. Coastal Engineering Proceedings, 1(32), currents.52. https://doi.org/10.9753/icce.v32.currents.52

Abstract

A quasi-three-dimensional model (quasi-3D) has been developed through the implementation of an analytical 1DV flow model in existing depth-averaged shallow water equations. The model includes the effects of waves and wind on the vertical distribution of the horizontal velocities. Comparisons with data from both physical and field cases show that the quasi-3D approach is able to combine the effect of vertical structures with the efficiency of depth-averaged simulations. Inter-comparisons with three-dimensional simulations show that the quasi-3D approach can represent similar velocity profiles in the surf zone. Quasi-3D morphodynamic simulations show that the bed dynamics in the surf zone represent the relevant 3D effects in the surf zone much more than the depth-averaged computations. It was shown that the quasi-3D approach is computationally efficient as it only adds about 15-20% to the runtimes of a 2DH simulation which is minor compared to a run time increase of 250-800% when switching to a 3D simulation.

https://doi.org/10.9753/icce.v32.currents.52

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References

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QUASI-3D MODELLING OF SURF ZONE DYNAMICS

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