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| Titel |
An integrated coastal model for aeolian and hydrodynamic sediment transport |
| VerfasserIn |
F. Baart, J. den Bieman, M. van Koningsveld, A. P. Luijendijk, E. J. R. Parteli, N. G. Plant, J. A. Roelvink, J. E. A. Storms, S. de Vries, J. S. M. Van Thiel de Vries, Q. Ye |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250070325
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| Zusammenfassung |
| Dunes are formed by aeolian and hydrodynamic processes. Over the last decades numerical
models were developed that capture our knowledge of the hydrodynamic transport of
sediment near the coast. At the same time others have worked on creating numerical models
for aeolian-based transport.
Here we show a coastal model that integrates three existing numerical models into
one online-coupled system. The XBeach model simulates storm-induced erosion
(Roelvink et al., 2009). The Delft3D model (Lesser et al., 2004) is used for long term
morphology and the Dune model (Durán et al., 2010) is used to simulate the aeolian
transport. These three models were adapted to be able to exchange bed updates in real
time. The updated models were integrated using the ESMF framework (Hill et
al., 2004), a system for composing coupled modeling systems. The goal of this
integrated model is to capture the relevant coastal processes at different time and spatial
scales.
Aeolian transport can be relevant during storms when the strong winds are generating
new dunes, but also under relative mild conditions when the dunes are strengthened by
transporting sand from the intertidal area to the dunes. Hydrodynamic transport is
also relevant during storms, when high water in combination with waves can cause
dunes to avalanche and erode. While under normal conditions the hydrodynamic
transport can result in an onshore transport of sediment up to the intertidal area. The
exchange of sediment in the intertidal area is a dynamic interaction between the
hydrodynamic transport and the aeolian transport. This dynamic interaction is particularly
important for simulating dune evolution at timescales longer than individual storm
events.
The main contribution of the integrated model is that it simulates the dynamic exchange
of sediment between aeolian and hydrodynamic models in the intertidal area. By integrating
the numerical models, we hope to develop a model that has a broader scope and applicability
than existing models and is capable of simulating both the growth and destruction of coastal
dunes.
The integrated version of XBeach and Dune is currently being applied for a test case in
Assateague Island in the United States. The integrated version of XBeach, Dune and Delft3D
is applied to the Sand Engine in the Netherlands.
In the presentation we show the current status of the development, experiences with the
first test cases and our plans for future developments.
[Durán et al., 2010]   Durán, O., Parteli, E. J., and Herrmann, H. J. (2010). A
continuous model for sand dunes: Review, new developments and application to
barchan dunes and barchan dune fields. Earth Surface Processes and Landforms,
35(13):1591–1600.
[Hill et al., 2004]   Hill, C., DeLuca, C., Balaji, Suarez, M., and Da Silva, A.
(2004). The architecture of the earth system modeling framework. Computing in
Science Engineering, 6(1):18 – 28.
[Lesser et al., 2004]   Lesser, G. R., Roelvink, J. A., van Kester, J. A. T. M.,
and Stelling, G. S. (2004). Development and validation of a three-dimensional
morphological model. Coastal Engineering, 51(8-9):883–915. Coastal
Morphodynamic Modeling.
[Roelvink et al., 2009]   Roelvink, D., Reniers, A., van Dongeren, A., de Vries, J.
v. T., McCall, R., and Lescinski, J. (2009). Modelling storm impacts on beaches,
dunes and barrier islands. Coastal Engineering, 56(11-12):1133–1152. |
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