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Export of dissolved and suspended matter from the main estuaries in South Portugal during winter conditions

2020-08Journal article Restricted access
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dc.contributor.authorCorreia, C.
dc.contributor.authorTorres, A. F.
dc.contributor.authorRosa, A.
dc.contributor.authorCravo, Alexandra
dc.contributor.authorJacob, J.
dc.contributor.authorde Oliveira Junior, L.
dc.contributor.authorGarel, Erwan
dc.date.accessioned2021-06-24T11:35:21Z
dc.date.available2021-06-24T11:35:21Z
dc.date.issued2020-08
dc.description.abstractEstuaries are essential drivers of primary productivity in coastal waters through the export of dissolved and suspended material. This study aims at quantifying this fertilization process at the two main estuaries in South Portugal, where typical low river discharge conditions occur in winter due to strong flow regulation by upstream dams and seldom-local rain events. Data were collected across the channel of the lower Arade (10/01/2018) and Guadiana (04/02/2019) estuaries during a semi-diurnal tidal cycle with intermediate tidal ranges (1.5 m and 2.2 m, respectively). Current velocity records were completed with hourly water quality measurements (temperature, salinity, pH, dissolved oxygen, suspended solids, chlorophyll a and nutrients) for determination of the along channel fluxes and residual mass transport of dissolved and suspended matter across the channel sections. The results show that the two estuaries were characterized by distinct water circulation patterns and tidal properties (e.g., standing wave at the Arade, mixed wave at the Guadiana). The concentration of dissolved and particulate matter displayed a general similar anti-phase pattern of variations with tidal height at both sites. The corresponding fluxes were generally strongest during the ebb phase. Thus, the residual mass transport was seaward, indicating that both estuaries contribute to fertilize adjacent coastal waters by exporting nutrients (order of kg), chlorophyll a (order of kg) and suspended solids (up to tons). Moreover, transport differences at both estuaries reflect specific discharge flow and environmental conditions as well as contamination sources close to the study areas. In particular, the signatures of a discharge event from a water treatment plant at the Arade and of coastal upwelling at the Guadiana were identified.
dc.description.sponsorshipFCT (Fundacao para a Ciencia e Tecnologia, Portugal)Portuguese Foundation for Science and Technology [IF/00661/2014/CP1234]
dc.description.sponsorshipFCTPortuguese Foundation for Science and TechnologyEuropean Commission [UID/MAR/00350/2013]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.marchem.2020.103827
dc.identifier.issn0304-4203
dc.identifier.urihttp://hdl.handle.net/10400.1/16415
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationCentre for Marine and Environmental Research
dc.relationHydrodynamics during high river inflows in narrow estuaries: a proxy for extreme flood events at larger systems
dc.subjectArade estuary
dc.subjectGuadiana estuary
dc.subjectTransport
dc.subjectNutrients
dc.subjectChlorophyll a
dc.subject.otherChemistry
dc.titleExport of dissolved and suspended matter from the main estuaries in South Portugal during winter conditions
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardTitleHydrodynamics during high river inflows in narrow estuaries: a proxy for extreme flood events at larger systems
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMAR%2F00350%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Investigador FCT/IF%2F00661%2F2014%2FCP1234%2FCT0001/PT
oaire.citation.startPage103827
oaire.citation.titleMarine Chemistry
oaire.citation.volume224
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamInvestigador FCT
person.familyNameCravo
person.familyNameJacob
person.familyNameGarel
person.givenNameAlexandra
person.givenNameJosé
person.givenNameErwan
person.identifier.ciencia-id7419-EE20-8039
person.identifier.ciencia-id7210-CCF6-4C5E
person.identifier.ciencia-id5D13-7EA7-6C6D
person.identifier.orcid0000-0002-2569-3929
person.identifier.orcid0000-0001-9718-7470
person.identifier.orcid0000-0002-4584-9759
person.identifier.ridN-9811-2014
person.identifier.scopus-author-id36552467800
person.identifier.scopus-author-id23491739700
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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