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Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia

2015-03Journal article Open Access
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dc.contributor.authorSampath, DMR
dc.contributor.authorBoski, T.
dc.contributor.authorLoureiro, Carlos
dc.contributor.authorSousa, Carlos A. Mendes da Silva de
dc.date.accessioned2018-12-07T14:53:41Z
dc.date.available2018-12-07T14:53:41Z
dc.date.issued2015-03
dc.description.abstractThis paper focuses on simulations of the morphological evolution of an estuary during sedimentary infilling that accompanied Holocene sea-level rise. The simulations were conducted using the Estuarine Sedimentation Model, which uses a behaviour-oriented approach, supported by the chronostratigraphy of the estuary's sedimentary sequence. Behaviour curves were computed to represent the relationship between the estuarine channel depth below maximum high tide and the net accretion at a given location relative to the average sedimentation rate of the estuary during the Holocene. The model was validated by comparing the observed present-day bathymetry of the Guadiana River Estuary, southeastern Portugal, with the corresponding simulated bathymetries for nine control sections across the estuary. The best fit between simulated and actual sediment surface elevations was obtained along the cross-sections in the sheltered, low-energy environments of the estuary. The accuracy of the sedimentary stratigraphy of the best-fit model was further established using 16 radiocarbon ages obtained from five boreholes in the estuary. The present approach is particularly suitable for simulating long-term morphological evolution in sheltered estuarine environments where tidally driven vertical aggradation dominates at centennial to millennium timescales. However, the accuracy of simulated sediment surface elevations and consequently the robustness of behaviour-type models based on Geographical Information System platforms can be enhanced by incorporating (i) the impacts of nearshore hydrodynamic processes and episodic flood events in highly energetic channels, and (ii) the impacts of cross-currents in meandering channel sections. (C) 2015 Elsevier B.V. All rights reserved.
dc.description.sponsorshipFCT [SFRH/BD/70747/2010, SFRH/BPD/85335/2012]
dc.identifier.doi10.1016/j.geomorph.2014.12.037
dc.identifier.issn0169-555X
dc.identifier.issn1872-695X
dc.identifier.urihttp://hdl.handle.net/10400.1/11639
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier Science Bv
dc.relationCOASTAL RESPONSES TO SEA-LEVEL RISE ON CENTENNIAL TO MILLENNIAL TIME SCALES: DEVELOPMENT OF HYBRID MODEL-BASED FORECASTING FOR THE GUADIANA ESTUARY
dc.subjectSediment Accumulation Rates
dc.subjectDigital Elevation Models
dc.subjectMorphological Response
dc.subjectBathymetric Evolution
dc.subjectOsl Chronology
dc.subjectBound Estuary
dc.subjectSalt-Marsh
dc.subjectPortugal
dc.subjectStratigraphy
dc.subjectClimate
dc.titleModelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCOASTAL RESPONSES TO SEA-LEVEL RISE ON CENTENNIAL TO MILLENNIAL TIME SCALES: DEVELOPMENT OF HYBRID MODEL-BASED FORECASTING FOR THE GUADIANA ESTUARY
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F70747%2F2010/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F85335%2F2012/PT
oaire.citation.endPage64
oaire.citation.startPage47
oaire.citation.titleGeomorphology
oaire.citation.volume232
oaire.fundingStreamSFRH
person.familyNameDissanayake Mudiyanselage
person.familyNameBoski
person.familyNameLoureiro
person.familyNameMendes da Silva de Sousa
person.givenNameRuwan Sampath
person.givenNameTomasz
person.givenNameCarlos
person.givenNameCarlos A
person.identifier453264
person.identifier.ciencia-idDE1B-EC67-D7FD
person.identifier.ciencia-id1416-B317-51D1
person.identifier.ciencia-id011D-31BD-C6B6
person.identifier.ciencia-idBF10-E2DF-06BB
person.identifier.orcid0000-0001-6931-9384
person.identifier.orcid0000-0003-2462-4179
person.identifier.orcid0000-0003-3117-3492
person.identifier.orcid0000-0003-4616-2278
person.identifier.ridU-9863-2018
person.identifier.scopus-author-id6602267486
person.identifier.scopus-author-id23667861200
person.identifier.scopus-author-id37015016500
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.rightsopenAccess
rcaap.typearticle
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