Shoreline response to a sandy nourishment in a wave-dominated coast using video monitoring
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10362/101003 |
Resumo: | Beach nourishment is a soft engineering intervention that supplies sand to the shore, to increase the beach recreational area and to decrease coastal vulnerability to erosion. This study presents the preliminary evaluation of nourishment works performed at the high-energy wave-dominated Portuguese coast. The shoreline was adopted as a proxy to study beach evolution in response to nourishment and to wave forcing. To achieve this aim, images collected by a video monitoring system were used. A nourishment calendar was drawn up based on video screening, highlighting the different zones and phases where the works took place. Over the six-month monitoring period, a total amount of 25 video-derived shorelines were detected by both manual and automated procedures on video imagery. Nourishment works, realized in summer, enlarged the emerged beach extension by about 90 m on average. During winter, the shoreline retreated about 50 m due to wave forcing. Spatial analysis showed that the northern beach sector was more vulnerable and subject to erosion, as it is the downdrift side of the groin. |
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Shoreline response to a sandy nourishment in a wave-dominated coast using video monitoringbeachnearshoreremote sensingerosionsandDomínio/Área Científica::Engenharia e Tecnologia::Engenharia do AmbienteBeach nourishment is a soft engineering intervention that supplies sand to the shore, to increase the beach recreational area and to decrease coastal vulnerability to erosion. This study presents the preliminary evaluation of nourishment works performed at the high-energy wave-dominated Portuguese coast. The shoreline was adopted as a proxy to study beach evolution in response to nourishment and to wave forcing. To achieve this aim, images collected by a video monitoring system were used. A nourishment calendar was drawn up based on video screening, highlighting the different zones and phases where the works took place. Over the six-month monitoring period, a total amount of 25 video-derived shorelines were detected by both manual and automated procedures on video imagery. Nourishment works, realized in summer, enlarged the emerged beach extension by about 90 m on average. During winter, the shoreline retreated about 50 m due to wave forcing. Spatial analysis showed that the northern beach sector was more vulnerable and subject to erosion, as it is the downdrift side of the groin.Ferreira, JoséAndriolo, UmbertoRUNSantos, Catarina Sofia Jóia de Oliveira dos2020-07-17T09:29:02Z2020-0720202020-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/101003enginfo: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:RCAAP2024-03-11T04:47:20Zoai:run.unl.pt:10362/101003Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:39:28.552893Repositório 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 |
Shoreline response to a sandy nourishment in a wave-dominated coast using video monitoring |
title |
Shoreline response to a sandy nourishment in a wave-dominated coast using video monitoring |
spellingShingle |
Shoreline response to a sandy nourishment in a wave-dominated coast using video monitoring Santos, Catarina Sofia Jóia de Oliveira dos beach nearshore remote sensing erosion sand Domínio/Área Científica::Engenharia e Tecnologia::Engenharia do Ambiente |
title_short |
Shoreline response to a sandy nourishment in a wave-dominated coast using video monitoring |
title_full |
Shoreline response to a sandy nourishment in a wave-dominated coast using video monitoring |
title_fullStr |
Shoreline response to a sandy nourishment in a wave-dominated coast using video monitoring |
title_full_unstemmed |
Shoreline response to a sandy nourishment in a wave-dominated coast using video monitoring |
title_sort |
Shoreline response to a sandy nourishment in a wave-dominated coast using video monitoring |
author |
Santos, Catarina Sofia Jóia de Oliveira dos |
author_facet |
Santos, Catarina Sofia Jóia de Oliveira dos |
author_role |
author |
dc.contributor.none.fl_str_mv |
Ferreira, José Andriolo, Umberto RUN |
dc.contributor.author.fl_str_mv |
Santos, Catarina Sofia Jóia de Oliveira dos |
dc.subject.por.fl_str_mv |
beach nearshore remote sensing erosion sand Domínio/Área Científica::Engenharia e Tecnologia::Engenharia do Ambiente |
topic |
beach nearshore remote sensing erosion sand Domínio/Área Científica::Engenharia e Tecnologia::Engenharia do Ambiente |
description |
Beach nourishment is a soft engineering intervention that supplies sand to the shore, to increase the beach recreational area and to decrease coastal vulnerability to erosion. This study presents the preliminary evaluation of nourishment works performed at the high-energy wave-dominated Portuguese coast. The shoreline was adopted as a proxy to study beach evolution in response to nourishment and to wave forcing. To achieve this aim, images collected by a video monitoring system were used. A nourishment calendar was drawn up based on video screening, highlighting the different zones and phases where the works took place. Over the six-month monitoring period, a total amount of 25 video-derived shorelines were detected by both manual and automated procedures on video imagery. Nourishment works, realized in summer, enlarged the emerged beach extension by about 90 m on average. During winter, the shoreline retreated about 50 m due to wave forcing. Spatial analysis showed that the northern beach sector was more vulnerable and subject to erosion, as it is the downdrift side of the groin. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-07-17T09:29:02Z 2020-07 2020 2020-07-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10362/101003 |
url |
http://hdl.handle.net/10362/101003 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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.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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1799138010590085120 |