Dynamics of sediment transport in two subtropical plain rivers of South America

Autores
Orfeo, Oscar
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Two rivers located in the subtropical Chaco plain are compared in order to analyse the sediment transport dynamics. Gauging and sediment samples were obtained during different hydrological stages. Grain size and textural parameters were obtained for the bed material. Concentration and transport of suspended sediment were also determined. In the Bermejito River basin, the downstream increment of the discharge generates a predictive response in the sandy bed sediment. Discharge and suspended sediment load show a direct correlation. The Tapenagá River headwaters, composed mainly of fine sediments, are in extensive wetlands with deficient runoff. The sand content of the bed sediment increases constantly towards its confluence with the Parana River, owing to the erosion of old sandy river deposits. Although the concentration of suspended sediment maintains an inverse correlation with discharge, the suspended load increases downstream. In the lower course of this river the aquatic vegetation plays an important role because plants colonize the fluvial system during lower water periods, producing abundant organic matter. At the beginning of the flood period, the deposited fine material is rapidly re-suspended, generating a sudden increase of the wash load concentration together with the discharge increment. During the flood, there is no deposition over the clay-rich bed in the highlands, while the bed becomes increasingly composed of sands in the lower course.
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
Materia
Sediment Transport
Subtropical Rivers
Fluvial Sedimentology
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:11336/73454

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spelling Dynamics of sediment transport in two subtropical plain rivers of South AmericaOrfeo, OscarSediment TransportSubtropical RiversFluvial Sedimentologyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Two rivers located in the subtropical Chaco</place /> plain are compared in order to analyse the sediment transport dynamics. Gauging and sediment samples were obtained during different hydrological stages. Grain size and textural parameters were obtained for the bed material. Concentration and transport of suspended sediment were also determined. In the Bermejito</placename /> River basin</placetype /></place />, the downstream increment of the discharge generates a predictive response in the sandy bed sediment. Discharge and suspended sediment load show a direct correlation. The Tapenagá</placename /> River</placetype /></place /> headwaters, composed mainly of fine sediments, are in extensive wetlands with deficient runoff. The sand content of the bed sediment increases constantly towards its confluence with the Parana River</place />, owing to the erosion of old sandy river deposits. Although the concentration of suspended sediment maintains an inverse correlation with discharge, the suspended load increases downstream. In the lower course of this river the aquatic vegetation plays an important role because plants colonize the fluvial system during lower water periods, producing abundant organic matter. At the beginning of the flood period, the deposited fine material is rapidly re-suspended, generating a sudden increase of the wash load concentration together with the discharge increment. During the flood, there is no deposition over the clay-rich bed in the highlands, while the bed becomes increasingly composed of sands in the lower course.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; ArgentinaSchweizerbart2006-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/73454Orfeo, Oscar; Dynamics of sediment transport in two subtropical plain rivers of South America; Schweizerbart; Zeitschrift Fur Geomorphologie. Supplementband; 145; 12-2006; 229-2410044-2798CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.schweizerbart.de/publications/detail/isbn/9783443211455/Zeitschr_f_Geomorphologie_Suppl_Bd_1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:48:45Zoai:ri.conicet.gov.ar:11336/73454instacron: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 09:48:45.52CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Dynamics of sediment transport in two subtropical plain rivers of South America
title Dynamics of sediment transport in two subtropical plain rivers of South America
spellingShingle Dynamics of sediment transport in two subtropical plain rivers of South America
Orfeo, Oscar
Sediment Transport
Subtropical Rivers
Fluvial Sedimentology
title_short Dynamics of sediment transport in two subtropical plain rivers of South America
title_full Dynamics of sediment transport in two subtropical plain rivers of South America
title_fullStr Dynamics of sediment transport in two subtropical plain rivers of South America
title_full_unstemmed Dynamics of sediment transport in two subtropical plain rivers of South America
title_sort Dynamics of sediment transport in two subtropical plain rivers of South America
dc.creator.none.fl_str_mv Orfeo, Oscar
author Orfeo, Oscar
author_facet Orfeo, Oscar
author_role author
dc.subject.none.fl_str_mv Sediment Transport
Subtropical Rivers
Fluvial Sedimentology
topic Sediment Transport
Subtropical Rivers
Fluvial Sedimentology
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Two rivers located in the subtropical Chaco</place /> plain are compared in order to analyse the sediment transport dynamics. Gauging and sediment samples were obtained during different hydrological stages. Grain size and textural parameters were obtained for the bed material. Concentration and transport of suspended sediment were also determined. In the Bermejito</placename /> River basin</placetype /></place />, the downstream increment of the discharge generates a predictive response in the sandy bed sediment. Discharge and suspended sediment load show a direct correlation. The Tapenagá</placename /> River</placetype /></place /> headwaters, composed mainly of fine sediments, are in extensive wetlands with deficient runoff. The sand content of the bed sediment increases constantly towards its confluence with the Parana River</place />, owing to the erosion of old sandy river deposits. Although the concentration of suspended sediment maintains an inverse correlation with discharge, the suspended load increases downstream. In the lower course of this river the aquatic vegetation plays an important role because plants colonize the fluvial system during lower water periods, producing abundant organic matter. At the beginning of the flood period, the deposited fine material is rapidly re-suspended, generating a sudden increase of the wash load concentration together with the discharge increment. During the flood, there is no deposition over the clay-rich bed in the highlands, while the bed becomes increasingly composed of sands in the lower course.
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
description Two rivers located in the subtropical Chaco</place /> plain are compared in order to analyse the sediment transport dynamics. Gauging and sediment samples were obtained during different hydrological stages. Grain size and textural parameters were obtained for the bed material. Concentration and transport of suspended sediment were also determined. In the Bermejito</placename /> River basin</placetype /></place />, the downstream increment of the discharge generates a predictive response in the sandy bed sediment. Discharge and suspended sediment load show a direct correlation. The Tapenagá</placename /> River</placetype /></place /> headwaters, composed mainly of fine sediments, are in extensive wetlands with deficient runoff. The sand content of the bed sediment increases constantly towards its confluence with the Parana River</place />, owing to the erosion of old sandy river deposits. Although the concentration of suspended sediment maintains an inverse correlation with discharge, the suspended load increases downstream. In the lower course of this river the aquatic vegetation plays an important role because plants colonize the fluvial system during lower water periods, producing abundant organic matter. At the beginning of the flood period, the deposited fine material is rapidly re-suspended, generating a sudden increase of the wash load concentration together with the discharge increment. During the flood, there is no deposition over the clay-rich bed in the highlands, while the bed becomes increasingly composed of sands in the lower course.
publishDate 2006
dc.date.none.fl_str_mv 2006-12
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/11336/73454
Orfeo, Oscar; Dynamics of sediment transport in two subtropical plain rivers of South America; Schweizerbart; Zeitschrift Fur Geomorphologie. Supplementband; 145; 12-2006; 229-241
0044-2798
CONICET Digital
CONICET
url http://hdl.handle.net/11336/73454
identifier_str_mv Orfeo, Oscar; Dynamics of sediment transport in two subtropical plain rivers of South America; Schweizerbart; Zeitschrift Fur Geomorphologie. Supplementband; 145; 12-2006; 229-241
0044-2798
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.schweizerbart.de/publications/detail/isbn/9783443211455/Zeitschr_f_Geomorphologie_Suppl_Bd_1
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 Schweizerbart
publisher.none.fl_str_mv Schweizerbart
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
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