Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence

Autores
Ginsberg, Silvia Susana; Aliotta, Salvador; Lizasoain, Guillermo Omar
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The sedimentary circulation pattern at a deep hole at a tidal channel junction in an estuary environment is examined using morphosedimentological and seismostratigraphic data. The bottom and sub-bottom acoustic information (side scan sonar and 3.5 kHz pro fi ler) obtained at a tidal channel con fl uence in Bahía Blanca estuary (Argentina) evidences the depositional and erosive features, bed load sediment transport pathways and morphological evolution of the depression. This important depression in the con fl uence zone of the channels is characterised by the presence of steep scour faces (14°) at the mouth of both channels and gentle slopes (1.5°) opposite to them. Bed load sediment transport analysis reveals a differential circulation pattern of sand on both sides of the hole, which is associated with the different sediment availability in each channel. The side scan sonar information therefore indicates that there is no available sand in one of the channels whereas the other channel is characterised by the presence of a large amount of sediment coming from its inner area. Deposition therefore occurs on the side where sediment is mobilised as bed load by the ebb current dominance and on the face developed downstream. In the latter, a part from the sediment is de fl ected inward by the tidal fl ood currents which produce the deposition of sediment on the gentle side. The rest of the sediment is exported from the system by ebb currents. In contrast, erosion occurs on the opposite side of the hole and at the mouth of each channel and it is manifested by the outcrop of old sedimentary strata. The seismostratigraphic information collected in this study indicates that the depression was originally a fully erosive morphological feature. A descriptive model of the morphological evolution at a channel con fl uence is presented in this study.
Fil: Ginsberg, Silvia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Tecnológica Nacional; Argentina
Fil: Aliotta, Salvador. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; Argentina
Fil: Lizasoain, Guillermo Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Materia
Deep Hole
Tidal Channels
Channel Confluence
Morphodynamics
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:11336/28111
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/28111
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluenceGinsberg, Silvia SusanaAliotta, SalvadorLizasoain, Guillermo OmarDeep HoleTidal ChannelsChannel ConfluenceMorphodynamicshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The sedimentary circulation pattern at a deep hole at a tidal channel junction in an estuary environment is examined using morphosedimentological and seismostratigraphic data. The bottom and sub-bottom acoustic information (side scan sonar and 3.5 kHz pro fi ler) obtained at a tidal channel con fl uence in Bahía Blanca estuary (Argentina) evidences the depositional and erosive features, bed load sediment transport pathways and morphological evolution of the depression. This important depression in the con fl uence zone of the channels is characterised by the presence of steep scour faces (14°) at the mouth of both channels and gentle slopes (1.5°) opposite to them. Bed load sediment transport analysis reveals a differential circulation pattern of sand on both sides of the hole, which is associated with the different sediment availability in each channel. The side scan sonar information therefore indicates that there is no available sand in one of the channels whereas the other channel is characterised by the presence of a large amount of sediment coming from its inner area. Deposition therefore occurs on the side where sediment is mobilised as bed load by the ebb current dominance and on the face developed downstream. In the latter, a part from the sediment is de fl ected inward by the tidal fl ood currents which produce the deposition of sediment on the gentle side. The rest of the sediment is exported from the system by ebb currents. In contrast, erosion occurs on the opposite side of the hole and at the mouth of each channel and it is manifested by the outcrop of old sedimentary strata. The seismostratigraphic information collected in this study indicates that the depression was originally a fully erosive morphological feature. A descriptive model of the morphological evolution at a channel con fl uence is presented in this study.Fil: Ginsberg, Silvia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Tecnológica Nacional; ArgentinaFil: Aliotta, Salvador. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; ArgentinaFil: Lizasoain, Guillermo Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; ArgentinaElsevier Science2009-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/28111Ginsberg, Silvia Susana; Aliotta, Salvador; Lizasoain, Guillermo Omar; Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence; Elsevier Science; Geomorphology; 104; 3-4; 12-2009; 253-2610169-555XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0169555X08003954info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geomorph.2008.09.002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:39:00Zoai:ri.conicet.gov.ar:11336/28111instacron: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 09:39:01.062CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence
title Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence
spellingShingle Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence
Ginsberg, Silvia Susana
Deep Hole
Tidal Channels
Channel Confluence
Morphodynamics
title_short Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence
title_full Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence
title_fullStr Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence
title_full_unstemmed Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence
title_sort Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence
dc.creator.none.fl_str_mv Ginsberg, Silvia Susana
Aliotta, Salvador
Lizasoain, Guillermo Omar
author Ginsberg, Silvia Susana
author_facet Ginsberg, Silvia Susana
Aliotta, Salvador
Lizasoain, Guillermo Omar
author_role author
author2 Aliotta, Salvador
Lizasoain, Guillermo Omar
author2_role author
author
dc.subject.none.fl_str_mv Deep Hole
Tidal Channels
Channel Confluence
Morphodynamics
topic Deep Hole
Tidal Channels
Channel Confluence
Morphodynamics
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The sedimentary circulation pattern at a deep hole at a tidal channel junction in an estuary environment is examined using morphosedimentological and seismostratigraphic data. The bottom and sub-bottom acoustic information (side scan sonar and 3.5 kHz pro fi ler) obtained at a tidal channel con fl uence in Bahía Blanca estuary (Argentina) evidences the depositional and erosive features, bed load sediment transport pathways and morphological evolution of the depression. This important depression in the con fl uence zone of the channels is characterised by the presence of steep scour faces (14°) at the mouth of both channels and gentle slopes (1.5°) opposite to them. Bed load sediment transport analysis reveals a differential circulation pattern of sand on both sides of the hole, which is associated with the different sediment availability in each channel. The side scan sonar information therefore indicates that there is no available sand in one of the channels whereas the other channel is characterised by the presence of a large amount of sediment coming from its inner area. Deposition therefore occurs on the side where sediment is mobilised as bed load by the ebb current dominance and on the face developed downstream. In the latter, a part from the sediment is de fl ected inward by the tidal fl ood currents which produce the deposition of sediment on the gentle side. The rest of the sediment is exported from the system by ebb currents. In contrast, erosion occurs on the opposite side of the hole and at the mouth of each channel and it is manifested by the outcrop of old sedimentary strata. The seismostratigraphic information collected in this study indicates that the depression was originally a fully erosive morphological feature. A descriptive model of the morphological evolution at a channel con fl uence is presented in this study.
Fil: Ginsberg, Silvia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Tecnológica Nacional; Argentina
Fil: Aliotta, Salvador. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; Argentina
Fil: Lizasoain, Guillermo Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
description The sedimentary circulation pattern at a deep hole at a tidal channel junction in an estuary environment is examined using morphosedimentological and seismostratigraphic data. The bottom and sub-bottom acoustic information (side scan sonar and 3.5 kHz pro fi ler) obtained at a tidal channel con fl uence in Bahía Blanca estuary (Argentina) evidences the depositional and erosive features, bed load sediment transport pathways and morphological evolution of the depression. This important depression in the con fl uence zone of the channels is characterised by the presence of steep scour faces (14°) at the mouth of both channels and gentle slopes (1.5°) opposite to them. Bed load sediment transport analysis reveals a differential circulation pattern of sand on both sides of the hole, which is associated with the different sediment availability in each channel. The side scan sonar information therefore indicates that there is no available sand in one of the channels whereas the other channel is characterised by the presence of a large amount of sediment coming from its inner area. Deposition therefore occurs on the side where sediment is mobilised as bed load by the ebb current dominance and on the face developed downstream. In the latter, a part from the sediment is de fl ected inward by the tidal fl ood currents which produce the deposition of sediment on the gentle side. The rest of the sediment is exported from the system by ebb currents. In contrast, erosion occurs on the opposite side of the hole and at the mouth of each channel and it is manifested by the outcrop of old sedimentary strata. The seismostratigraphic information collected in this study indicates that the depression was originally a fully erosive morphological feature. A descriptive model of the morphological evolution at a channel con fl uence is presented in this study.
publishDate 2009
dc.date.none.fl_str_mv 2009-12
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/11336/28111
Ginsberg, Silvia Susana; Aliotta, Salvador; Lizasoain, Guillermo Omar; Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence; Elsevier Science; Geomorphology; 104; 3-4; 12-2009; 253-261
0169-555X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/28111
identifier_str_mv Ginsberg, Silvia Susana; Aliotta, Salvador; Lizasoain, Guillermo Omar; Morphodynamics and seismostratigraphy of a deep hole at tidal channel confluence; Elsevier Science; Geomorphology; 104; 3-4; 12-2009; 253-261
0169-555X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0169555X08003954
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geomorph.2008.09.002
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
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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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score 13.070432

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