SANDT-PRO: SEDIMENT TRANSPORT MEASUREMENTS UNDER IRREGULAR AND BREAKING WAVES

Jan S Ribberink, Dominic A van der A, Joep van der Zanden, Tom O'Donoghue, David Hurther, Iván Cáceres, Peter D Thorne

Abstract


First results are presented of a measurement campaign done in the large-scale Barcelona CIEM wave flume from October 2013 to January 2014. The aim of the experiments was to improve our understanding of sediment transport processes in the near-shore region. In particular, we focused on the effects of (1) wave breaking and (2) wave irregularity on net sediment transport rates and sediment transport processes. High-resolution measurements were obtained using advanced instrumentation, deployed from a custom-built measuring frame that could be horizontally and vertically positioned. These instruments provide detailed insights in the vertical distributions of sediment fluxes. Preliminary results from the breaking-wave experiments show an onshore transport of sediment prior to breaking, likely to be dominated by wave-nonlinearity effects, and an offshore sediment flux shoreward of breaking, where the sediment fluxes are undertow-dominated.

Keywords


sediment dynamics; sediment transport; breaking waves; surf zone; irregular waves; wave flume experiments; sheet flow;

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References


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DOI: https://doi.org/10.9753/icce.v34.sediment.1