期刊
OCEAN MODELLING
卷 157, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ocemod.2020.101730
关键词
Waves; White-capping; Wind; Swell; Fjord; ST6; SWAN
资金
- Norwegian Public Roads Administration under the Coastal Highway Route E39 project
This study investigates the performance of three different wave model source term packages in narrow fetch geometries, with the results indicating that the saturation-based approach of SWAN performs best in fjord systems. ST6 shows the highest sensitivity to fetch geometry and local wind changes, with all packages overestimating wave energy in narrow fetch geometry without swell.
This paper investigates the performance of three different wave model source term packages in narrow fetch geometries. The packages are used to model the sea state in a complex coastal system with narrow fjords on the west coast of Norway. The modelling system is based on the Simulating WAves Nearshore (SWAN) wave model that is forced with winds from a nested atmospheric model and wave spectra from a regional wave model at the boundaries. The performances of the recent ST6, and two older SWAN white-capping and wind input packages, are evaluated by comparing modelled spectra and integrated wave parameters against five wave buoys. The comparison covers long-term statistics and two case studies of narrow fetch geometries (i) without swell and (H) with swell-wind sea conditions. SWAN's original saturation-based approach performs best in the fjord system. In narrow fetch geometry without swell, all packages overestimate the wave energy. ST6 shows the highest sensitivity to fetch geometry and local wind changes. The results indicate that the ST6 white-capping is too weak to balance its strong wind input.
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