5.
SUMMARY AND FUTURE WORK
In this paper, we have presented a new unstructured grid morphodynamic model which
makes use of the existing ADCIRC finite element hydrodynamic model and a new DG finite
element sediment transport/morphological model.
Specific details were given on the
implementation of the DG method, and the model was shown to produce good results in three
idealized test cases. In the first test case it was verified, through the use of the Exner model, that
the method achieves second-order convergence in space. Additionally, it was demonstrated how
the DG method can accurately capture steep gradients in the bathymetry without the introduction
of spurious spatial oscillations. The second and third test cases demonstrated how the full
morphodynamic modelling system can be used to predict medium-term morphological changes of
the bed in channels and tidally dominated coastal inlets.
We conclude with some comments on the current development of this morphodynamic
modelling system, in terms of both physical and numerical features that will be implemented. In