LONGSHORE SEDIMENT TRANSPORT ON DEAN BEACH PROFILES

William G. McDougal, Robert T. Hudspeth

Abstract


Natural beaches exhibit an equilibrium profile that is planar nearshore and non-planar, concave-up offshore. The longshore current on these Dean equilibrium beaches is shown to depend on the location of the intersection between the planar and non-planar profiles and on the dimensionless mixing strength parameter if the eddy viscosity coefficient is linearly dependent on the distance offshore. The effect of the profile intersection on the longshore sediment transport rate is demonstrated for two energetics based sediment transport models; viz. the Bagnold and energetics stress models.

Keywords


Dean profile; beach profile; longshore transport; sediment transport

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