Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina

Autores
Parsons, Daniel R.; Best, James L.; Lane, Stuart N.; Orfeo, Oscar; Hardy, Richard J.; Kostaschuck, Ray
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Confluence–diffluence units are key elements within many river networks, having a major impact upon the routing of flow and sediment, and hence upon channel change. Although much progress has been made in understanding river confluences, and increasing attention is being paid to bifurcations and the important role of bifurcation asymmetry, most studies have been conducted in laboratory flumes or within small rivers with width:depth (aspect) ratios less than 50. This paper presents results of a field‐based study that details the bed morphology and 3D flow structure within a very large confluence–diffluence in the Río Paraná, Argentina, with a width:depth ratio of approximately 200. Flow within the confluence–diffluence is dominated largely by the bed roughness, in the form of sand dunes; coherent, channel‐scale, secondary flow cells, that have been identified as important aspects of the flow field within smaller channels, and assumed to be present within large rivers, are generally absent in this reach. This finding has profound implications for flow mixing rates, sediment transport rates and pathways, and thus the interpretation of confluence–diffluence morphology and sedimentology.
Fil: Parsons, Daniel R.. University of Leeds; Reino Unido
Fil: Best, James L.. University of Leeds; Reino Unido
Fil: Lane, Stuart N.. University Of Durham; Reino Unido
Fil: Orfeo, Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
Fil: Hardy, Richard J.. University Of Durham; Reino Unido
Fil: Kostaschuck, Ray. University of Guelph; Canadá
Materia
Form Roughness
Secondary Flow
Confluences
Difluences
Large Rivers
Parana River
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/43143
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/43143
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, ArgentinaParsons, Daniel R.Best, James L.Lane, Stuart N.Orfeo, OscarHardy, Richard J.Kostaschuck, RayForm RoughnessSecondary FlowConfluencesDifluencesLarge RiversParana Riverhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Confluence–diffluence units are key elements within many river networks, having a major impact upon the routing of flow and sediment, and hence upon channel change. Although much progress has been made in understanding river confluences, and increasing attention is being paid to bifurcations and the important role of bifurcation asymmetry, most studies have been conducted in laboratory flumes or within small rivers with width:depth (aspect) ratios less than 50. This paper presents results of a field‐based study that details the bed morphology and 3D flow structure within a very large confluence–diffluence in the Río Paraná, Argentina, with a width:depth ratio of approximately 200. Flow within the confluence–diffluence is dominated largely by the bed roughness, in the form of sand dunes; coherent, channel‐scale, secondary flow cells, that have been identified as important aspects of the flow field within smaller channels, and assumed to be present within large rivers, are generally absent in this reach. This finding has profound implications for flow mixing rates, sediment transport rates and pathways, and thus the interpretation of confluence–diffluence morphology and sedimentology.Fil: Parsons, Daniel R.. University of Leeds; Reino UnidoFil: Best, James L.. University of Leeds; Reino UnidoFil: Lane, Stuart N.. University Of Durham; Reino UnidoFil: Orfeo, Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; ArgentinaFil: Hardy, Richard J.. University Of Durham; Reino UnidoFil: Kostaschuck, Ray. University of Guelph; CanadáJohn Wiley & Sons Ltd2007-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/43143Parsons, Daniel R.; Best, James L.; Lane, Stuart N.; Orfeo, Oscar; Hardy, Richard J.; et al.; Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina; John Wiley & Sons Ltd; Earth Surface Processes And Landforms; 32; 1; 1-2007; 155-1620197-93371096-9837CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/esp.1457info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/esp.1457info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:45:04Zoai:ri.conicet.gov.ar:11336/43143instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:45:04.894CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina
title Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina
spellingShingle Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina
Parsons, Daniel R.
Form Roughness
Secondary Flow
Confluences
Difluences
Large Rivers
Parana River
title_short Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina
title_full Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina
title_fullStr Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina
title_full_unstemmed Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina
title_sort Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina
dc.creator.none.fl_str_mv Parsons, Daniel R.
Best, James L.
Lane, Stuart N.
Orfeo, Oscar
Hardy, Richard J.
Kostaschuck, Ray
author Parsons, Daniel R.
author_facet Parsons, Daniel R.
Best, James L.
Lane, Stuart N.
Orfeo, Oscar
Hardy, Richard J.
Kostaschuck, Ray
author_role author
author2 Best, James L.
Lane, Stuart N.
Orfeo, Oscar
Hardy, Richard J.
Kostaschuck, Ray
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Form Roughness
Secondary Flow
Confluences
Difluences
Large Rivers
Parana River
topic Form Roughness
Secondary Flow
Confluences
Difluences
Large Rivers
Parana River
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Confluence–diffluence units are key elements within many river networks, having a major impact upon the routing of flow and sediment, and hence upon channel change. Although much progress has been made in understanding river confluences, and increasing attention is being paid to bifurcations and the important role of bifurcation asymmetry, most studies have been conducted in laboratory flumes or within small rivers with width:depth (aspect) ratios less than 50. This paper presents results of a field‐based study that details the bed morphology and 3D flow structure within a very large confluence–diffluence in the Río Paraná, Argentina, with a width:depth ratio of approximately 200. Flow within the confluence–diffluence is dominated largely by the bed roughness, in the form of sand dunes; coherent, channel‐scale, secondary flow cells, that have been identified as important aspects of the flow field within smaller channels, and assumed to be present within large rivers, are generally absent in this reach. This finding has profound implications for flow mixing rates, sediment transport rates and pathways, and thus the interpretation of confluence–diffluence morphology and sedimentology.
Fil: Parsons, Daniel R.. University of Leeds; Reino Unido
Fil: Best, James L.. University of Leeds; Reino Unido
Fil: Lane, Stuart N.. University Of Durham; Reino Unido
Fil: Orfeo, Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
Fil: Hardy, Richard J.. University Of Durham; Reino Unido
Fil: Kostaschuck, Ray. University of Guelph; Canadá
description Confluence–diffluence units are key elements within many river networks, having a major impact upon the routing of flow and sediment, and hence upon channel change. Although much progress has been made in understanding river confluences, and increasing attention is being paid to bifurcations and the important role of bifurcation asymmetry, most studies have been conducted in laboratory flumes or within small rivers with width:depth (aspect) ratios less than 50. This paper presents results of a field‐based study that details the bed morphology and 3D flow structure within a very large confluence–diffluence in the Río Paraná, Argentina, with a width:depth ratio of approximately 200. Flow within the confluence–diffluence is dominated largely by the bed roughness, in the form of sand dunes; coherent, channel‐scale, secondary flow cells, that have been identified as important aspects of the flow field within smaller channels, and assumed to be present within large rivers, are generally absent in this reach. This finding has profound implications for flow mixing rates, sediment transport rates and pathways, and thus the interpretation of confluence–diffluence morphology and sedimentology.
publishDate 2007
dc.date.none.fl_str_mv 2007-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/43143
Parsons, Daniel R.; Best, James L.; Lane, Stuart N.; Orfeo, Oscar; Hardy, Richard J.; et al.; Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina; John Wiley & Sons Ltd; Earth Surface Processes And Landforms; 32; 1; 1-2007; 155-162
0197-9337
1096-9837
CONICET Digital
CONICET
url http://hdl.handle.net/11336/43143
identifier_str_mv Parsons, Daniel R.; Best, James L.; Lane, Stuart N.; Orfeo, Oscar; Hardy, Richard J.; et al.; Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina; John Wiley & Sons Ltd; Earth Surface Processes And Landforms; 32; 1; 1-2007; 155-162
0197-9337
1096-9837
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/esp.1457
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/esp.1457
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv John Wiley & Sons Ltd
publisher.none.fl_str_mv John Wiley & Sons Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1844613416921071616
score 13.070432

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