A NUMERICAL INVESTIGATION OF THE LONGSHORE CURRENT PROFILE FOR MULTIPLE BAR/TROUGH BEACHES

Steven K. Baum; David R. Basco

doi:10.9753/icce.v20.73

No. 20 (1986), Conference Proceedings

No. 20 (1986)

A NUMERICAL INVESTIGATION OF THE LONGSHORE CURRENT PROFILE FOR MULTIPLE BAR/TROUGH BEACHES

Conference Proceedings

https://doi.org/10.9753/icce.v20.73

Published 1986-01-29

Steven K. Baum⁺⁻
David R. Basco⁺⁻

Steven K. Baum

Department of Oceanography, Texas A&M University

David R. Basco

Coastal Engineering Institute, Department of Civil Engineering

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Keywords

numerical investigation
longshore current
current
current profile
multiple bear
trough beach

How to Cite

Baum, S. K., & Basco, D. R. (1986). A NUMERICAL INVESTIGATION OF THE LONGSHORE CURRENT PROFILE FOR MULTIPLE BAR/TROUGH BEACHES. Coastal Engineering Proceedings, 1(20), 73. https://doi.org/10.9753/icce.v20.73

Abstract

A numerical model is developed which calculates the longshore current profile for an arbitrary bottom profile. The basis of the model is the use of radiation stress theory in a longshore momentum balance equation which includes a driving stress, a bottom stress, and a lateral mixing stress. Each of the stresses is derived from previously developed formulations, rederiving them to take into account separate cross shore variations in the wave height and the water depth, as well as the wave approach angle. This is done to dispense with the constant wave breaking index assumption used to model wave decay in the surf zone, which is rejected as unrealistic for natural beaches. A numerical model is used to calculate distributions of the wave height and water depth across the surf zone for arbitrary, yet realistic, bottom profiles. A numerical model of the theoretically derived longshore momentum balance equation is developed and solved using the distributions obtained from the wave decay model. The profiles calculated are compared to previous theoretical models and to laboratory and field measurements.

https://doi.org/10.9753/icce.v20.73

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Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.

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A NUMERICAL INVESTIGATION OF THE LONGSHORE CURRENT PROFILE FOR MULTIPLE BAR/TROUGH BEACHES

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