NEW FRAMEWORK FOR PREDICTION OF LONGSHORE CURRENTS

C.A. Fleming; D.H. Swart

doi:10.9753/icce.v18.99

No. 18 (1982), Conference Proceedings

No. 18 (1982)

NEW FRAMEWORK FOR PREDICTION OF LONGSHORE CURRENTS

Conference Proceedings

https://doi.org/10.9753/icce.v18.99

Published 1982-01-29

C.A. Fleming⁺⁻
D.H. Swart⁺⁻

C.A. Fleming

Sir William Halcrow and Partners

D.H. Swart

National Research Institute for Oceanology, CSIR

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Keywords

longshore current
current
current prediction

How to Cite

Fleming, C., & Swart, D. (1982). NEW FRAMEWORK FOR PREDICTION OF LONGSHORE CURRENTS. Coastal Engineering Proceedings, 1(18), 99. https://doi.org/10.9753/icce.v18.99

Abstract

The accuracy of prediction of longshore sediment transport depends largely on the accuracy with which the wave-driven longshore currents within the breaker zone can be predicted. Longuet-Higgins (1970) developed a formulation for longshore transport which is widely used today. In the present paper the basic theory of Longuet-Higgins is reexamined. The effect of bed roughness on the magnitude of the longshore current is quantified with the aid of over 350 individual data sets and the theory is theoretically extended to include the effect of random waves, in a similar way to Battjes (1974), and higher-order waves. For this latter purpose the Vocoidal water wave theory of Swart (1978) is used. It is shown that the use of Vocoidal theory leads to a velocity distribution which is in closer correspondence to measured data than that predicted by using linear wave theory.

https://doi.org/10.9753/icce.v18.99

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NEW FRAMEWORK FOR PREDICTION OF LONGSHORE CURRENTS

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