Field measurements of sheet flow sediment transport in the swash zone

Thijs Lanckriet, Jack A. Puleo, Gerd Masselink, I.L. Turner, Daniel Conley, C Blenkinsopp, P.E. Russell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

A newly developed Conductivity Concentration Profiler (CCP), capable of rendering a 29-point sediment
concentration profile at 1 mm vertical resolution, was deployed on a macrotidal beach in Perranporth, UK, as part of a
comprehensive field study on swash zone hydrodynamics and sediment transport. Initial field results show the
occurrence of sheet flow during both the uprush andbackwash phases of the swash cycle. Concentration profiles in
the sheet flow layer are approximately linear, witha power-law tail at the top of the layer. The datasuggest that shear
stresses are the dominant forcing for sediment mobilization, but pressure gradients provide a secondary mobilization
mechanism.
Original languageEnglish
Title of host publicationInternational Conference on Coastal Engineering
Subtitle of host publicationProceedings of 33rd Conference on Coastal Engineering, Santander, Spain, 2012
EditorsP Lynett, J M McKee Smith
Number of pages7
Volume33 (2012)
Publication statusPublished - 2 Jul 2012

Keywords

  • swash zone
  • sediment transport
  • sheet flow

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