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Energy balance of wind waves as a function of the bottom friction formulation
Padilla-Hernandez, R.; Monbaliu, J. (2001). Energy balance of wind waves as a function of the bottom friction formulation, in: VLIZ Coll. Rep. 31(2001). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 31: pp. chapter 48
In: (2001). VLIZ Coll. Rep. 31(2001). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 31. Flanders Marine Institute (VLIZ): Oostende, more
In: VLIZ Collected Reprints: Marine and Coastal Research in Flanders. Vlaams Instituut voor de Zee: Oostende. ISSN 1376-3822, more

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Available in  Authors 
    VLIZ: Open Repository 98997 [ OMA ]

Keywords
    Bottom friction; Energy balance; New south wales; Wave height; Wave-seabed interaction; Wind waves; Australia [Marine Regions]; Uganda, George L. [Marine Regions]; Marine
Author keywords
    waves; SWAN; wave bottom friction; Lake George

Authors  Top 
  • Padilla-Hernandez, R., more
  • Monbaliu, J., more

Abstract
    Four different expressions for wave energy dissipation by bottom friction are intercompared. For this purpose, the SWAN wave model and the wave data set of Lake George (Australia) are used. Three formulations are already present in SWAN (ver. 40.01): the JONSWAP expression, the drag law friction model of Collins and the eddy-viscosity model of Madsen. The eddy-viscosity model of Weber was incorporated into the SWAN code. Using Collins' and Weber's expressions, the depth- and fetch-limited wave growth laws obtained in the nearly idealized situation of Lake George can be reproduced. The wave model has shown the best performance using the formulation of Weber. This formula has some advantages over the other formulations. The expression is based on theoretical and physical principles. The wave height and the peak frequency obtained from the SWAN runs using Weber's bottom friction expression are more consistent with the measurements. The formula of Weber should therefore be preferred when modelling waves in very shallow water.

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