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Flash Rip Statistics from Video Images

dc.rights.licenseopenen_US
hal.structure.identifierLaboratoire Géosciences Océan [LGO]
dc.contributor.authorFLOC'H, France
dc.contributor.authorMABIALA, Guy Rodier
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorALMAR, Rafael
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCASTELLE, Bruno
IDREF: 087596520
dc.contributor.authorHALL, Nicholas
hal.structure.identifierEchanges Côte-Large [ECOLA]
dc.contributor.authorDU PENHOAT, Yves
hal.structure.identifierPlymouth University
dc.contributor.authorSCOTT, Tim
hal.structure.identifierLaboratoire Géosciences Océan [LGO]
dc.contributor.authorDELACOURT, Christophe
dc.date.accessioned2024-04-25T11:17:15Z
dc.date.available2024-04-25T11:17:15Z
dc.date.issued2018-09-03
dc.identifier.issn0749-0208en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/199340
dc.description.abstractEnThe coast of the Gulf of Guinea is exposed to high-energy waves generating strong nearshore currents both driving erosion and posing a threat to recreational beach goers and fishermen. Along this coast, the coexistence of swash and flash rip currents at Grand-Popo beach (Benin) was evidenced in a previous study using a limited number of Lagrangian drifter measurements. In this paper, a method based on color processing of video images from a permanent station has been developed to detect the presence of rip currents via a change of turbidity. Rip current characteristics and their link with tide and wave forcing over a 7-day period are derived. During this experiment, a total of 434 events has been counted during daylight. The majority of rips occurred at low tide and migrates downdrift. Flash rip activity is maximized for shore-normal wave incidence and mild wave conditions showing that flash rips are not driven by shear instabilities of the longshore current at this site. However, the lack of strong variability in wave forcing throughout the experiment prevents a more thorough wave-rip relationship investigation, which motivates the application of the method for a longer period with a wide wave-tide spectrum.
dc.description.sponsorshipMarier les objectifs de défense côtière avec ceux de la protection du milieu naturel grâce aux dunes sableuses - ANR-17-CE01-0014en_US
dc.language.isoENen_US
dc.title.enFlash Rip Statistics from Video Images
dc.typeArticle de revueen_US
dc.identifier.doi10.2112/SI81-013.1en_US
dc.subject.halPlanète et Univers [physics]/Interfaces continentales, environnementen_US
bordeaux.journalJournal of Coastal Researchen_US
bordeaux.page100-106en_US
bordeaux.volume81en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamMETHYSen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02353261
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Coastal%20Research&rft.date=2018-09-03&rft.volume=81&rft.spage=100-106&rft.epage=100-106&rft.eissn=0749-0208&rft.issn=0749-0208&rft.au=FLOC'H,%20France&MABIALA,%20Guy%20Rodier&ALMAR,%20Rafael&CASTELLE,%20Bruno&HALL,%20Nicholas&rft.genre=article


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