 |
| Titel |
Wave-current interactions: model development and preliminary results |
| VerfasserIn |
Clement Mayet, Florent Lyard, Fabrice Ardhuin |
| Konferenz |
EGU General Assembly 2013
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250081069
|
|
|
|
|
|
| Zusammenfassung |
| The coastal area concentrates many uses that require integrated management based on
diagnostic and predictive tools to understand and anticipate the future of pollution
from land or sea, and learn more about natural hazards at sea or activity on the
coast. The realistic modelling of coastal hydrodynamics needs to take into account
various processes which interact, including tides, surges, and sea state (Wolf [2008]).
These processes act at different spatial scales. Unstructured-grid models have shown
the ability to satisfy these needs, given that a good mesh resolution criterion is
used.
We worked on adding a sea state forcing in a hydrodynamic circulation model. The sea
state model is the unstructured version of WAVEWATCH III c (Tolman [2008])
(which version is developed at IFREMER, Brest (Ardhuin et al. [2010]) ), and the
hydrodynamic model is the 2D barotropic module of the unstructured-grid finite
element model T-UGOm (Le Bars et al. [2010]). We chose to use the radiation
stress approach (Longuet-Higgins and Stewart [1964]) to represent the effect of
surface waves (wind waves and swell) in the barotropic model, as previously done
by Mastenbroek et al. [1993]and others. We present here some validation of the
model against academic cases : a 2D plane beach (Haas and Warner [2009]) and a
simple bathymetric step with analytic solution for waves (Ardhuin et al. [2008]). In
a second part we present realistic application in the Ushant Sea during extreme
event.
References
Ardhuin, F., N. Rascle, and K. Belibassakis, Explicit wave-averaged primitive
equations using a generalized Lagrangian mean, Ocean Modelling, 20 (1), 35–60,
doi:10.1016/j.ocemod.2007.07.001, 2008.
Ardhuin, F., et al., Semiempirical Dissipation Source Functions for Ocean Waves. Part I:
Definition, Calibration, and Validation, J. Phys. Oceanogr., 40 (9), 1917–1941,
doi:10.1175/2010JPO4324.1, 2010.
Haas, K. A., and J. C. Warner, Comparing a quasi-3D to a full 3D nearshore
circulation model: SHORECIRC and ROMS, Ocean Modelling, 26 (1-2), 91–103,
2009.
Le Bars, Y., F. Lyard, C. Jeandel, and L. Dardengo, The AMANDES tidal model for the
Amazon estuary and shelf, Ocean Modelling, 31 (3-4), 132–149, 2010.
Longuet-Higgins, M., and R. Stewart, Radiation stresses in water waves; a physical
discussion, with applications, Deep Sea Research and Oceanographic Abstracts, 11 (4),
529–562, 1964.
Mastenbroek, C., G. Burgers, and P. A. E. M. Janssen, The Dynamical Coupling of a
Wave Model and a Storm Surge Model through the Atmospheric Boundary Layer, pp. –,
1993.
Tolman, H. L., A mosaic approach to wind wave modeling, Ocean Modelling, 25 (1-2),
35–47, 2008.
Wolf, J., Coastal flooding: impacts of coupled wave–surge–tide models, Nat Hazards, 49
(2), 241–260, 2008. |
|
|
|
|
|
|