Title

Limits of Beach and Dune Erosion in Response to Wave Runup Elucidated from SUPERTANK

Document Type

Conference Proceeding

Publication Date

5-2007

Digital Object Identifier (DOI)

https://doi.org/10.1061/40926(239)154

Abstract

The unique dataset from SUPERTANK is analyzed to examine the upper limit of beach change in response to elevated water level caused by wave runup. Thirty SUPERTANK runs are investigated, including both erosional and accretionary wave conditions under random and monochromatic waves. The upper limit of beach change approximately equals the maximum vertical excursion of swash runup. Exceptions to this direct relationship are those with beach or dune scarps. The vertical extent of wave runup above mean water level on a non-scarped beach is approximately equal to the significant breaking wave height. Scarps substantially limit the uprush of swash motion, resulting in a much reduced maximum runup. Predictions of wave runup are not improved by including a slope-dependent surf-similarity parameter. The limit of wave runup is substantially less for monochromatic waves than for random waves, attributed to absence of low-frequency motion for monochromatic waves.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Presented at the Sixth International Symposium on Coastal Engineering and Science of Coastal Sediment Process in May 2007 in New Orleans, LA

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