Weak dependence of the SWAN wave model on hydrodynamic properties of sea bottom |
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| Authors: | B. A. Kagan O. Alvarez E. V. Gorchakov |
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| Affiliation: | (1) Shirshov Institute of Oceanology (St. Petersburg Branch), Russian Academy of Sciences, Vasil’evskii ostrov, Pervaya liniya 30, St. Petersburg, 199053, Russia;(2) Department of Applied Physics, Cadiz University, Building 40, 11510 Puerto Real, Cadiz, Spain;(3) UCA-CSIS United Interdisciplinary Group of Oceanology, Cadiz University, Building 40, 11510 Puerto Real, Cadiz, Spain;(4) Russian State Hydrometeorological University, Malookhtinskii pr. 98, St. Petersburg, 195196, Russia |
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| Abstract: | The third generation of the SWAN wave model is modified by the incorporation of new resistance laws for hydrodynamically rough, incompletely rough (smoothly rough), and smooth underlying surfaces. A modified model is used to determine the functional dependences of wave parameters (such as the dimensionless energy of waves and the dimensionless spectral peak frequency) on a dimensionless fetch. The results of calculations are compared to the experimental data obtained in Lake George (northeastern Australia), which has a nearly constant depth and extended, nearly rectilinear segments of coast. The SWAN model is shown to depend weakly on hydrodynamic properties of the sea bottom: distinctions arising from changes in hydrodynamic properties of the sea bottom are smaller than the variances of experimental estimates. |
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