Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.1/11639 |
Resumo: | This 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. |
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Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW IberiaSediment Accumulation RatesDigital Elevation ModelsMorphological ResponseBathymetric EvolutionOsl ChronologyBound EstuarySalt-MarshPortugalStratigraphyClimateThis 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.FCT [SFRH/BD/70747/2010, SFRH/BPD/85335/2012]Elsevier Science BvSapientiaSampath, DMRBoski, T.Loureiro, CarlosSousa, Carlos A. Mendes da Silva de2018-12-07T14:53:41Z2015-032015-03-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/11639eng0169-555X10.1016/j.geomorph.2014.12.037info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:23:29Zoai:sapientia.ualg.pt:10400.1/11639Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:03:07.149337Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia |
title |
Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia |
spellingShingle |
Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia Sampath, DMR Sediment Accumulation Rates Digital Elevation Models Morphological Response Bathymetric Evolution Osl Chronology Bound Estuary Salt-Marsh Portugal Stratigraphy Climate |
title_short |
Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia |
title_full |
Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia |
title_fullStr |
Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia |
title_full_unstemmed |
Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia |
title_sort |
Modelling of estuarine response to sea-level rise during the Holocene: Application to the Guadiana Estuary-SW Iberia |
author |
Sampath, DMR |
author_facet |
Sampath, DMR Boski, T. Loureiro, Carlos Sousa, Carlos A. Mendes da Silva de |
author_role |
author |
author2 |
Boski, T. Loureiro, Carlos Sousa, Carlos A. Mendes da Silva de |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Sampath, DMR Boski, T. Loureiro, Carlos Sousa, Carlos A. Mendes da Silva de |
dc.subject.por.fl_str_mv |
Sediment Accumulation Rates Digital Elevation Models Morphological Response Bathymetric Evolution Osl Chronology Bound Estuary Salt-Marsh Portugal Stratigraphy Climate |
topic |
Sediment Accumulation Rates Digital Elevation Models Morphological Response Bathymetric Evolution Osl Chronology Bound Estuary Salt-Marsh Portugal Stratigraphy Climate |
description |
This 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. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-03 2015-03-01T00:00:00Z 2018-12-07T14:53:41Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.1/11639 |
url |
http://hdl.handle.net/10400.1/11639 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0169-555X 10.1016/j.geomorph.2014.12.037 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier Science Bv |
publisher.none.fl_str_mv |
Elsevier Science Bv |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799133265307631616 |