Accession Number : ADA116588

Title :   An Energetics Total Load Sediment Transport Model for a Plane Sloping Beach.

Descriptive Note : Final technical note Oct 80-Sep 81,

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s) : Bailard,J A

PDF Url : ADA116588

Report Date : Apr 1982

Pagination or Media Count : 69

Abstract : Bagnold's energetics-based total sediment transport model for streams is used as a basis for the development of a total load model of time-varying sediment transport over a plane sloping bed. In both the bedload and suspended load, the transport rate vectors are found to be composed of a velocity-induced component directed parallel to the instantaneous velocity vector and a gravity-induced component directed downslope. The model is applied to idealized surfzone conditions, leading to estimates of the local longshore and on-offshore sediment transport as well as the equilibrium beach slope, as a function of the local wave and current conditions. The model is combined with a nonlinear longshore current model and is spatially integrated to obtain predictions of the total longshore transport rate as a function of the incident wave conditions. The results support the general form of the wave power equation except that the wave power coefficient is no longer constant but is instead a complex function of the incident wave and beach characteristics. (Author)

Descriptors :   *Sediment transport, Surf, Littoral zones, Beaches, Slope, Time, Variations, Mathematical models

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE