Influence of bed material density on local scour around spur dikes

Detalhes bibliográficos
Autor(a) principal: Couto, L. T.
Data de Publicação: 1994
Outros Autores: Cardoso, A. H., Rocha, J. S.
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1007373
Resumo: An experimental study on local scour has recently started in a laboratory flume at the National Laboratory of Civil Engineering (LNEC) in Lisbon. The main objective of this study is the investigation of the influence of the sediment specific density on the final scour hole around a spill-through spur dike placed perpendicular to the flow, in order to improve knowledge for the use of light-weight bed materiaIs in physical modelling. The results of three sets of runs under regime conditions, corresponding to two different mixtures of river sand and a light weight bed material, are discussed. Experiments were made under live-bed and with clear-water conditions, for which different equations, obtained by multiple regression ana1ysis, are suggested, allowing the prediction of the maximum scour depth. The paper presents the results already obtained and the discussion on maximum scour depth and geometric characterisation of the scour holes in the framework of existing literature.
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spelling Influence of bed material density on local scour around spur dikesLocal scourSpur dikesExperimental studyDensityAn experimental study on local scour has recently started in a laboratory flume at the National Laboratory of Civil Engineering (LNEC) in Lisbon. The main objective of this study is the investigation of the influence of the sediment specific density on the final scour hole around a spill-through spur dike placed perpendicular to the flow, in order to improve knowledge for the use of light-weight bed materiaIs in physical modelling. The results of three sets of runs under regime conditions, corresponding to two different mixtures of river sand and a light weight bed material, are discussed. Experiments were made under live-bed and with clear-water conditions, for which different equations, obtained by multiple regression ana1ysis, are suggested, allowing the prediction of the maximum scour depth. The paper presents the results already obtained and the discussion on maximum scour depth and geometric characterisation of the scour holes in the framework of existing literature.2015-07-24T13:10:00Z2017-04-13T09:09:01Z1994-08-01T00:00:00Z1994-08conference objectinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://repositorio.lnec.pt:8080/jspui/handle/123456789/1007373engCouto, L. T.Cardoso, A. H.Rocha, J. S.info: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:RCAAP2024-09-28T03:04:13Zoai:localhost:123456789/1007373Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-09-28T03:04:13Repositório 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 Influence of bed material density on local scour around spur dikes
title Influence of bed material density on local scour around spur dikes
spellingShingle Influence of bed material density on local scour around spur dikes
Couto, L. T.
Local scour
Spur dikes
Experimental study
Density
title_short Influence of bed material density on local scour around spur dikes
title_full Influence of bed material density on local scour around spur dikes
title_fullStr Influence of bed material density on local scour around spur dikes
title_full_unstemmed Influence of bed material density on local scour around spur dikes
title_sort Influence of bed material density on local scour around spur dikes
author Couto, L. T.
author_facet Couto, L. T.
Cardoso, A. H.
Rocha, J. S.
author_role author
author2 Cardoso, A. H.
Rocha, J. S.
author2_role author
author
dc.contributor.author.fl_str_mv Couto, L. T.
Cardoso, A. H.
Rocha, J. S.
dc.subject.por.fl_str_mv Local scour
Spur dikes
Experimental study
Density
topic Local scour
Spur dikes
Experimental study
Density
description An experimental study on local scour has recently started in a laboratory flume at the National Laboratory of Civil Engineering (LNEC) in Lisbon. The main objective of this study is the investigation of the influence of the sediment specific density on the final scour hole around a spill-through spur dike placed perpendicular to the flow, in order to improve knowledge for the use of light-weight bed materiaIs in physical modelling. The results of three sets of runs under regime conditions, corresponding to two different mixtures of river sand and a light weight bed material, are discussed. Experiments were made under live-bed and with clear-water conditions, for which different equations, obtained by multiple regression ana1ysis, are suggested, allowing the prediction of the maximum scour depth. The paper presents the results already obtained and the discussion on maximum scour depth and geometric characterisation of the scour holes in the framework of existing literature.
publishDate 1994
dc.date.none.fl_str_mv 1994-08-01T00:00:00Z
1994-08
2015-07-24T13:10:00Z
2017-04-13T09:09:01Z
dc.type.driver.fl_str_mv conference object
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://repositorio.lnec.pt:8080/jspui/handle/123456789/1007373
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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
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