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Effects of tidal and river discharge forcings on tidal propagation along the Guadiana Estuary

2019-04Journal article Restricted access
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dc.contributor.authorCalero Quesada, Maria Concepcion
dc.contributor.authorGarcia-Lafuente, Jesus
dc.contributor.authorGarel, Erwan
dc.contributor.authorDelgado Cabello, Javier
dc.contributor.authorMartins, Flávio
dc.contributor.authorMoreno-Navas, Juan
dc.date.accessioned2020-07-24T10:52:37Z
dc.date.available2020-07-24T10:52:37Z
dc.date.issued2019-04
dc.description.abstractA numerical model is implemented to explore the effect of the river discharge on tidal propagation along the Guadiana Estuary, a rock-bound estuary located in Southwest Iberia. The MOHID numerical model, in 2D barotropic mode, has been forced by tides at the ocean side and by freshwater at the upstream boundary of the domain. The model was validated using water level and velocity observations at several locations along the estuary. Different scenarios with variable tidal forcings and freshwater discharges were analysed, considering the semi- diurnal constituents and M4 overtide, in order to assess the influence of each external agent on the along-channel hydrodynamics. The model reproduces the expected general tidal properties along the channel in terms of amplitude (of both elevation and current), asymmetry and phase between horizontal and vertical tides. Three zones along the estuary have been defined based on the overtide patterns. Tidal propagation in Zone I, at the lower estuary, vary essentially with the tidal amplitude at the mouth while changes due to river discharge are minor. Along Zone II (middle estuary), the tidal forcing still predominates, for low discharge values only. Along Zone III (upper estuary), the tidal propagation is primarily controlled by the river discharge. Although the discharge threshold vary with the location and parameter considered, it is estimated that a discharge as little as 100 m3/s has a strong effect on the tidal properties along the system as a whole. It is therefore concluded that tidal properties in rock-bound estuaries may be importantly modified by relatively weak river discharge events.
dc.description.sponsorshipCampus de Excelencia Internacional del Mar (Plan ReSEArch Agregacion-CEIMAR) [18INAC0284]
dc.description.sponsorshipFCTPortuguese Foundation for Science and Technology [IF/00661/2014/CP1234]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.seares.2019.01.006
dc.identifier.issn1385-1101
dc.identifier.issn1873-1414
dc.identifier.urihttp://hdl.handle.net/10400.1/14383
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier Science
dc.subjectWave propagation
dc.subjectWater
dc.subjectCirculation
dc.subjectDynamics
dc.subjectMouth
dc.subjectModel
dc.subjectTides
dc.titleEffects of tidal and river discharge forcings on tidal propagation along the Guadiana Estuary
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage13
oaire.citation.startPage1
oaire.citation.titleJournal of Sea Research
oaire.citation.volume146
person.familyNameGarel
person.familyNameMartins
person.givenNameErwan
person.givenNameFlávio
person.identifier.ciencia-id5D13-7EA7-6C6D
person.identifier.ciencia-id6711-E990-FFD9
person.identifier.orcid0000-0002-4584-9759
person.identifier.orcid0000-0002-9863-6255
person.identifier.ridN-9811-2014
person.identifier.ridU-2673-2018
person.identifier.scopus-author-id23491739700
person.identifier.scopus-author-id7006504350
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication7e619cba-3bfb-4964-bdf3-b8afd91a4a29
relation.isAuthorOfPublication1a3bc5b3-6032-43b3-880e-1a551ba84d02
relation.isAuthorOfPublication.latestForDiscovery7e619cba-3bfb-4964-bdf3-b8afd91a4a29

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