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Tidal bore dynamics in funnel-shaped estuaries

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBONNETON, Philippe
IDREF: 059798823
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBONNETON, Natalie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorPARISOT, Jean-Paul
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCASTELLE, Bruno
IDREF: 087596520
dc.date.accessioned2024-05-06T14:05:20Z
dc.date.available2024-05-06T14:05:20Z
dc.date.issued2015-02-17
dc.identifier.issn2169-9275en_US
dc.identifier.urihttps://www.researchgate.net/publication/272640377_Tidal_bore_dynamics_in_funnel-shaped_estuaries
dc.identifier.urioai:crossref.org:10.1002/2014jc010267
dc.identifier.uriorcid:0000-0003-1740-7395:10.1002/2014jc010267
dc.identifier.urioai:researchgate.net:272640377
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/199666
dc.description.abstractEnThe formation and dynamics of tidal bores in funnel-shaped estuaries is investigated from both a global tidal wave scaling analysis and new quantitative field observations. We show that tidal bore occurrence in convergent estuaries can be estimated from a dimensionless scaling parameter characterizing the relative intensity of nonlinear friction versus local inertia in the momentum equation. A detailed analysis of tidal bore formation and secondary wave structure is presented from a unique long-term database (observations of more than 200 tides) acquired during four campaigns in the two main French tidal-bore estuaries: the Seine and Gironde/Garonne estuaries. We describe the effect of freshwater discharge on the global tidal wave transformation at the estuarine scale and on local tidal bore occurrence in the upper estuary. Our field data suggest that the tidal bore intensity is mainly governed by the dimensionless tidal range, which characterizes the local tidal wave nonlinearity. We also show that the secondary wavefield associated with tidal bore propagating in natural estuaries differs significantly from those associated to undular bores in rectangular channels. In particular, we observe an abrupt decrease of the whelp steepness when the Froude number goes below 1.1. This secondary field transition can explain why tidal bore occurrence in worldwide estuaries is certainly underestimated.
dc.language.isoENen_US
dc.sourcecrossref
dc.sourceorcid
dc.sourceresearchgate
dc.title.enTidal bore dynamics in funnel-shaped estuaries
dc.typeArticle de revueen_US
dc.identifier.doi10.1002/2014jc010267en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalJournal of Geophysical Research. Oceansen_US
bordeaux.page923-941en_US
bordeaux.volume120en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue2en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamMETHYSen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.identifierhal-04569839
hal.version1
hal.date.transferred2024-05-06T14:05:22Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
workflow.import.sourcedissemin
dc.rights.ccPas de Licence CCen_US
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