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dc.contributor.authorThorpe, A
dc.contributor.authorMiles, J
dc.contributor.authorMasselink, G
dc.contributor.authorRussell, P
dc.date.accessioned2016-09-09T23:57:20Z
dc.date.available2016-09-09T23:57:20Z
dc.date.issued2014-04
dc.identifier.issn0749-0208
dc.identifier.issn1551-5036
dc.identifier.urihttp://hdl.handle.net/10026.1/5431
dc.description.abstract

A Sand Ripple Profiler (SRP) was deployed in a rip channel on a dissipative sandy beach to measure bedform height (Δ), length (λ) and migration rate (Mr) throughout a macro-tidal cycle. Data were collected in significant wave heights ranging from 0.5 m to 2.1 m and water depths of between 0.9 m and 7.4 m. Periods when the rip current was active were identified by comparing measured cross-shore velocity (U) with predicted cross-shore velocity from a bed return flow model. Rip flow was found to commence when offshore velocities reached approximately 0.1 m/s, maximum rip velocity as a 5 minute mean was 0.74 m/s. At lower tidal elevations (h < 2.5 m), in the strong offshore flow of the rip current megaripples were found to migrate offshore (Mr = 0-4 cm/min). When migration occurred in a rip current migration rates were correlated with U with the highest migration rates found in the strongest flows. In non-rip current conditions megaripples exhibited two types of migration behaviour; (1) migrating onshore at a maximum rate of 2.1 cm/min when h was in the range of 2.5 m to 5 m and wave skewness was high and (2) megaripples were stable when mean flows and skewness were low, this occurred at higher tidal elevations when h > 5m.

dc.format.extent700-705
dc.languageen
dc.language.isoen
dc.publisherCoastal Education and Research Foundation
dc.subjectRip Currents
dc.subjectMegaripples
dc.subjectField Measurements
dc.subjectBedform Migration
dc.titleBedform Dynamics in a Rip Current
dc.typejournal-article
dc.typeArticle
dc.typeProceedings Paper
plymouth.author-urlhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000338176100119&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.issuesp1
plymouth.volume70
plymouth.publisher-urlhttp://dx.doi.org/10.2112/si70-118.1
plymouth.publication-statusPublished
plymouth.journalJOURNAL OF COASTAL RESEARCH
dc.identifier.doi10.2112/SI70-118.1
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Admin Group - REF
plymouth.organisational-group/Plymouth/Admin Group - REF/REF Admin Group - FoSE
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Biological and Marine Sciences
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Engineering, Computing and Mathematics
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA12 Engineering
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Marine Institute
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
plymouth.organisational-group/Plymouth/Users by role/Researchers in ResearchFish submission
dcterms.dateAccepted2014-02-21
dc.identifier.eissn1551-5036
dc.rights.embargoperiodNot known
rioxxterms.funderNatural Environment Research Council
rioxxterms.identifier.projectDynamics of Rip currents and Implications for Beach Safety (DRIBS)
rioxxterms.versionofrecord10.2112/SI70-118.1
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2014-04
rioxxterms.typeJournal Article/Review
plymouth.funderDynamics of Rip currents and Implications for Beach Safety (DRIBS)::Natural Environment Research Council


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