PROFILE CHANGE OF A SHEET FLOW DOMINATED BEACH

Mohammed Dibajnia, Takuzo Shimizu, Akira Watanabe

Abstract


A new and detailed model for predicting the profile change of a real beach is presented. The model is based on the sediment transport formula of Dibajnia and Watanabe (1992) and therefore incorporates, explicitly, the asymmetry of the near-bottom orbital velocity and the undertow into the transport of bottom sediment. Its applicability is examined by using the data of beach profile change obtained from prototype scale laboratory experiments as well as field measurements. It is shown that quite accurate profile simulation is possible when the details of the flow field and transport mechanism are considered.

Keywords


profile change; beach profile; sheetflow

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