Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal
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/10174/17215 https://doi.org/10.3319/TAO.2015.03.30.01(TT) |
Resumo: | Espichel-Sines is an embayed coast in SW Portugal, consisting of two capes at both extremities, a tidal inlet and associated ebb tidal delta, a barrier spit, sandy beaches, sea cliffs, and a submarine canyon. Beach berm, backshore, near shore and inner shelf sediment samples were taken. Samples were analyzed for their grain-size compositions. This study ranks the hypothetical sediment sources influences on the sediment distributions in the study area using the multivariate Empirical Orthogonal Function (EOF) techniques. Transport pathways in this study were independently identified using the grain size trend analysis (GSTA) technique to verify the EOF findings. The results show that the cliff-erosion sediment is composed of pebbles and sand and is the most important sediment source for the entire embayment. The sediment at the inlet mouth is a mixture of pebbles, sand, silt, and clay, which is a minor sediment source that only has local influence. The overall grain-size distributions on the shelf are dominated by the sand except for the high mud content around the tidal delta front in the northern embayment. Sediment transport patterns on the inner shelf at the landward and north sides of the canyon head are landward and northward along the barrier spit, respectively. On the south side of the canyon head, the prevailing sediment transport is seaward. Sediment transport occurs in both directions along the shore. |
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Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of PortugalSediment grain sizeSediment sourceEmpirical Orthogonal Function (EOF) analysisGrain size trend analysis (GSTA)Sediment transport pathwayEspichel-Sines is an embayed coast in SW Portugal, consisting of two capes at both extremities, a tidal inlet and associated ebb tidal delta, a barrier spit, sandy beaches, sea cliffs, and a submarine canyon. Beach berm, backshore, near shore and inner shelf sediment samples were taken. Samples were analyzed for their grain-size compositions. This study ranks the hypothetical sediment sources influences on the sediment distributions in the study area using the multivariate Empirical Orthogonal Function (EOF) techniques. Transport pathways in this study were independently identified using the grain size trend analysis (GSTA) technique to verify the EOF findings. The results show that the cliff-erosion sediment is composed of pebbles and sand and is the most important sediment source for the entire embayment. The sediment at the inlet mouth is a mixture of pebbles, sand, silt, and clay, which is a minor sediment source that only has local influence. The overall grain-size distributions on the shelf are dominated by the sand except for the high mud content around the tidal delta front in the northern embayment. Sediment transport patterns on the inner shelf at the landward and north sides of the canyon head are landward and northward along the barrier spit, respectively. On the south side of the canyon head, the prevailing sediment transport is seaward. Sediment transport occurs in both directions along the shore.Terrestrial Atmospheric and Oceanic Sciences2016-02-02T12:05:50Z2016-02-022015-03-30T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/17215http://hdl.handle.net/10174/17215https://doi.org/10.3319/TAO.2015.03.30.01(TT)engDu, X., C. Gama, J. T. Liu, and P. Baptista, 2015: Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal. Terr. Atmos. Ocean. Sci., 26, 397-409, doi: 10.3319/TAO.2015.03.30.01(TT)ndcgama@uevora.ptndnd250Du, XiaoqinGama, CristinaT. Liu, JamesBaptista, Pauloinfo: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:RCAAP2024-01-03T19:04:10Zoai:dspace.uevora.pt:10174/17215Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:09:14.166486Repositório 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 |
Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal |
title |
Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal |
spellingShingle |
Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal Du, Xiaoqin Sediment grain size Sediment source Empirical Orthogonal Function (EOF) analysis Grain size trend analysis (GSTA) Sediment transport pathway |
title_short |
Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal |
title_full |
Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal |
title_fullStr |
Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal |
title_full_unstemmed |
Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal |
title_sort |
Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal |
author |
Du, Xiaoqin |
author_facet |
Du, Xiaoqin Gama, Cristina T. Liu, James Baptista, Paulo |
author_role |
author |
author2 |
Gama, Cristina T. Liu, James Baptista, Paulo |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Du, Xiaoqin Gama, Cristina T. Liu, James Baptista, Paulo |
dc.subject.por.fl_str_mv |
Sediment grain size Sediment source Empirical Orthogonal Function (EOF) analysis Grain size trend analysis (GSTA) Sediment transport pathway |
topic |
Sediment grain size Sediment source Empirical Orthogonal Function (EOF) analysis Grain size trend analysis (GSTA) Sediment transport pathway |
description |
Espichel-Sines is an embayed coast in SW Portugal, consisting of two capes at both extremities, a tidal inlet and associated ebb tidal delta, a barrier spit, sandy beaches, sea cliffs, and a submarine canyon. Beach berm, backshore, near shore and inner shelf sediment samples were taken. Samples were analyzed for their grain-size compositions. This study ranks the hypothetical sediment sources influences on the sediment distributions in the study area using the multivariate Empirical Orthogonal Function (EOF) techniques. Transport pathways in this study were independently identified using the grain size trend analysis (GSTA) technique to verify the EOF findings. The results show that the cliff-erosion sediment is composed of pebbles and sand and is the most important sediment source for the entire embayment. The sediment at the inlet mouth is a mixture of pebbles, sand, silt, and clay, which is a minor sediment source that only has local influence. The overall grain-size distributions on the shelf are dominated by the sand except for the high mud content around the tidal delta front in the northern embayment. Sediment transport patterns on the inner shelf at the landward and north sides of the canyon head are landward and northward along the barrier spit, respectively. On the south side of the canyon head, the prevailing sediment transport is seaward. Sediment transport occurs in both directions along the shore. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-03-30T00:00:00Z 2016-02-02T12:05:50Z 2016-02-02 |
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/10174/17215 http://hdl.handle.net/10174/17215 https://doi.org/10.3319/TAO.2015.03.30.01(TT) |
url |
http://hdl.handle.net/10174/17215 https://doi.org/10.3319/TAO.2015.03.30.01(TT) |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Du, X., C. Gama, J. T. Liu, and P. Baptista, 2015: Sediment sources and transport pathway identification based on grain-size distributions on the SW coast of Portugal. Terr. Atmos. Ocean. Sci., 26, 397-409, doi: 10.3319/TAO.2015.03.30.01(TT) nd cgama@uevora.pt nd nd 250 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Terrestrial Atmospheric and Oceanic Sciences |
publisher.none.fl_str_mv |
Terrestrial Atmospheric and Oceanic Sciences |
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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1799136574860951552 |