Show simple item record

dc.contributor.authorHsu, Tian-Jian
dc.contributor.authorElgar, Steve
dc.contributor.authorGuza, R. T.
dc.date.accessioned2006-10-26T12:34:36Z
dc.date.available2006-10-26T12:34:36Z
dc.date.issued2006-04-06
dc.identifier.urihttp://hdl.handle.net/1912/1280
dc.descriptionAuthor Posting. © Elsevier B.V., 2006. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Coastal Engineering 53 (2006): 817-824, doi:10.1016/j.coastaleng.2006.04.003.en
dc.description.abstractThe 25-m onshore migration of a nearshore sandbar observed over a 5-day period near Duck, NC is simulated with a simplified, computationally efficient, wave-resolving singlephase model. The modeled sediment transport is assumed to occur close to the seabed and to be in phase with the bottom stress. Neglected intergranular stresses and fluid-granular interactions, likely important in concentrated flow, are compensated for with an elevated (relative to that appropriate for a clear fluid) model roughness height that gives the best fit to the observed bar migration. Model results suggest that when mean-current-induced transport is small, wave-induced transport leads to the observed onshore bar migration. Based on the results from the simplified phase-resolving model, a wave-averaged, energetics-type model (e.g., only moments of the near-bottom velocity field are required) with different friction factors for oscillatory and mean flows is developed that also predicts the observed bar migration. Although the assumptions underlying the models differ, the similarity of model results precludes determination of the dominant mechanisms of sediment transport during onshore bar migration.en
dc.description.sponsorshipSupported by the Office of Naval Research, the National Science Foundation, the Army Research Office, and the Woods Hole Oceanographic Institution Coastal Ocean Institute.en
dc.format.extent725071 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen
dc.relation.urihttps://doi.org/10.1016/j.coastaleng.2006.04.003
dc.subjectSediment transporten
dc.subjectSandbar migrationen
dc.subjectWave boundary layeren
dc.subjectRoughnessen
dc.subjectBottom stressen
dc.titleWave-induced sediment transport and onshore sandbar migrationen
dc.typePreprinten


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record