THE EQUATIONS FOR INTERNAL AND MEAN FLOW PROPERTIES IN THE SWASH ZONE

M. Brocchini, D.H. Peregrine

Abstract


The swash zone is the area of a beach where the waves move the instantaneous shoreline back and forth. This zone is modelled using the nonlinear shallowwater equations (NLSWE) as equations of motion, as is appropriate for gently sloping beaches. Integrated swash zone boundary conditions are derived for wave resolving models: their use gives considerable numerical advantages. Waveaveraged and swash-zone integrated boundary conditions have also been derived. They include numerous terms for which closures are to be found.

Keywords


swash zone; mean flow; integral flow; flow properties

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