WAVE OVERWASH OF SUBAERIAL DUNES

Yukiko Tega; Nobuhisa Kobayashi

doi:10.9753/icce.v25.%p

No. 25 (1996), Conference Proceedings

No. 25 (1996)

WAVE OVERWASH OF SUBAERIAL DUNES

Conference Proceedings

https://doi.org/10.9753/icce.v25.%25p

Published 1996-01-29

Yukiko Tega⁺⁻
Nobuhisa Kobayashi⁺⁻

Yukiko Tega

Technical Research Institute, Nishimatsu Construction Co.Ltd.

Nobuhisa Kobayashi

Center for Applied Coastal Research, University of Delaware

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Keywords

dune
subaerial dune
overwash

How to Cite

Tega, Y., & Kobayashi, N. (1996). WAVE OVERWASH OF SUBAERIAL DUNES. Coastal Engineering Proceedings, 1(25). https://doi.org/10.9753/icce.v25.%p

Abstract

Small-scale experimental results consisting of 72 runs for minor to major dune overwash are analyzed to improve existing dune erosion models that do not account for wave overwash processes explicitly. The measured cross-shore sediment transport rate is found to vary approximately linearly from the measured rate somewhat below the still water level, which is affected by the overwash intensity, to the overwash rate over the dune crest. The measured overwash sand concentration for the sand with its median diameter of 0.38 mm used in this experiment was in the range of 0.02 to 0.06. The time-dependent one-dimensional numerical model for the overtopping flow combined with two sediment transport formulas indicates that the overwash sand concentraion may be on the order of 0.04 except for very fine or coarse sands.

https://doi.org/10.9753/icce.v25.%25p

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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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WAVE OVERWASH OF SUBAERIAL DUNES

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