Onderzoeksoutput

Two version of the model are available:
• A stand-alone TOMAWAC wave propagation model. Only the vertical effect of the tide, i.e. the water level, is considered in a schematised way: the water level is only temporally varying and spatially uniform in the entire domain.
• A coupled current-wave interaction version of the model. In this version both tidal currents as wave-induced currents are considered. Since the wave driven currents have a significant contribution of the sediment transport near-shore and onshore, this is the version that will be coupled to the sediment transport model.
Before, it was only possible to couple TOMAWAC wave propagation models to TELEMAC tidal models and SISYPHE sediment transport models, when all models have the same domain outline and identical grids. However, due to the nature of the models, a shallow water solver often requires different grid properties than a wave model. Often, a lower resolution is sufficient for the wave transport model than for the hydrodynamics and sediment transport model. Also, parts of the model domain that are limited influenced by waves, like upstream the estuary and the Eastern Scheldt, it is not necessary to include them in the wave model. Since the wave propagation model often is the bottle neck with respect to computational cost for long term morphodynamic modelling, it was decided to develop a new routine, TEL2TOM, which allows to couple the wave and the hydrodynamic models in an efficient way running the models on different grids with a different resolution and different domain. For the fully coupled morphodynamic model, the implementation of TEL2TOM reduced the total computation time with a factor two without loss of accuracy.
The wave propagation models are available at the Flanders Hydraulics Research model repository: https://wlsubversion. vlaanderen.be/!/#repoSpNumMod/view/head/TELEMAC/Scaldis- Kust/15_068%20Complex%20Model%20Kustvisie%202021/2_WAVEMODELS