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Water exchanges between a multi-inlet lagoon and the ocean: the role of forcing mechanisms

2016-02Journal article Restricted access
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dc.contributor.authorFabião, João Pedro Farinha
dc.contributor.authorRodrigues, Marta Filipa Gomes
dc.contributor.authorFortunato, André Bustorff
dc.contributor.authorJacob, J.
dc.contributor.authorFrancisco Cravo, Alexandra Maria
dc.date.accessioned2017-04-07T15:57:11Z
dc.date.available2017-04-07T15:57:11Z
dc.date.issued2016-02
dc.description.abstractUnderstanding the influence of the main drivers controlling the circulation and the transport in coastal lagoons is a necessary step towards the description of the dynamics of their ecosystems. Thus, the influence of the main physical drivers on the water exchanges in a multi-inlet barrier island (western sector of the Ria Formosa coastal lagoon, Portugal) was investigated. Several scenarios of tide, wind, bathymetry and point source discharges were simulated using a three-dimensional circulation model and a particle-tracking model. The circulation is adequately reproduced by the hydrodynamic model, with root mean square errors of about 5-8 cm for the water levels and 5-10 cm/s for the cross-sectional averaged velocities in the western inlets and main channels. Wind has a negligible effect on the modelled water levels and cross-sectional velocities, with differences smaller than 1 % between the simulations with and without wind. However, results show that wind influences significantly the transport by affecting the residual circulation, with distinct effects depending on the wind direction. Upwelling favourable winds (with west component) increase the landward transport through the Faro-Olho inlet and promote a larger dispersion of the water-borne material inside the lagoon. The residual circulation between the three inlets of the western sector of the lagoon is also significantly affected by the bathymetry. Results show a decrease of about 50 % of the tidal prism of the Anco inlet between 2002 and 2011, which reduces its capacity to export waterborne material to the adjacent coastal area and increases the residence times in some areas of the lagoon, with potentially adverse effects on the ecosystems' health. The dispersion of potential contaminants from point sources inside the lagoon to the coastal area depends on the combined effect of the tidal phase and amplitude and the location of the source. Mean residence times for the discharges from the wastewater treatment plants of the western sector ranged from 7 to 18 days. These findings improve the understanding of the influence of the physical forcings in the circulation and transport dynamics of multi-inlet coastal systems.
dc.identifier.doi10.1007/s10236-015-0918-7
dc.identifier.issn1616-7341
dc.identifier.otherAUT: JJA00032
dc.identifier.urihttp://hdl.handle.net/10400.1/9637
dc.language.isoeng
dc.peerreviewedyes
dc.relationNutrients and particulate matter dynamics - exchanges between a COAstal LAgoon and the adjacent ocean through a multiple inlet system: the case of Ria Formosa, south of Portugal - COALA
dc.relation.isbasedonWOS:000370161100004
dc.titleWater exchanges between a multi-inlet lagoon and the ocean: the role of forcing mechanisms
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleNutrients and particulate matter dynamics - exchanges between a COAstal LAgoon and the adjacent ocean through a multiple inlet system: the case of Ria Formosa, south of Portugal - COALA
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F114217%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F87512%2F2012/PT
oaire.citation.endPage194
oaire.citation.issue2
oaire.citation.startPage173
oaire.citation.titleOcean Dynamics
oaire.citation.volume66
oaire.fundingStream3599-PPCDT
oaire.fundingStreamSFRH
person.familyNameJacob
person.givenNameJosé
person.identifier.ciencia-id7210-CCF6-4C5E
person.identifier.orcid0000-0001-9718-7470
person.identifier.scopus-author-id36552467800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
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relation.isAuthorOfPublication.latestForDiscoveryae234da9-68be-4322-a65b-7b1f2c1c0135
relation.isProjectOfPublication92fe5290-b5de-4957-ac65-cab09b487a6d
relation.isProjectOfPublicatione91ba318-4bbd-48e2-908f-4aa9bb58f54b
relation.isProjectOfPublication.latestForDiscovery92fe5290-b5de-4957-ac65-cab09b487a6d

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