Calculated Potential Bedload Versus Real Transported Sands along the Guadiana River Estuary (Spain–Portugal)

The Guadiana estuary is a coastal system located in the southwest of the Iberian Peninsula and is the natural border between Portugal and Spain. It is a rock-bounded estuary which extends along more than 40 km and is characterized by a semidiurnal mesotidal regime. This paper represents an approach...

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Autores: Morales González, Juan Antonio, Lozano Guerra-Librero, Claudio, Sedrati, Mouncef
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:inglés
OAI Identifier:oai:ariasmontano.uhu.es:10272/17695
Acceso en línea:http://hdl.handle.net/10272/17695
Access Level:acceso abierto
Palabra clave:Guadiana Estuary
Tidal currents
Potential bedload transport
Real sediment input
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spelling Calculated Potential Bedload Versus Real Transported Sands along the Guadiana River Estuary (Spain–Portugal)Morales González, Juan AntonioLozano Guerra-Librero, ClaudioSedrati, MouncefGuadiana EstuaryTidal currentsPotential bedload transportReal sediment inputThe Guadiana estuary is a coastal system located in the southwest of the Iberian Peninsula and is the natural border between Portugal and Spain. It is a rock-bounded estuary which extends along more than 40 km and is characterized by a semidiurnal mesotidal regime. This paper represents an approach to the bedload transport across two flow sections located in the fluvial and marine domains. In the fluvial profile, the most frequent bedform is the plane bed. In the marine area the bed of the deep channel is composed of well-sorted sand, while a lateral bar displays partially cohesive sediments with dominant fine sands in a matrix of clayey silts. Data were acquired during spring and neap tides. Near-bottom water velocities were registered by an acoustic Doppler current profiler (ADCP). Density and bed rugosity were determined in sediment samples. These data were employed using Bagnold’s equation (1963) to quantify the potential bedload (Qb). Further, real bedload values (Sb) were obtained by using Poliako traps. The comparison of the results of Qb under both ebb and flood conditions demonstrated a clear river-to-sea net transport in both sectors. The values of Sb were lower than those of Qb in every condition. The sand input across the fluvial estuary cannot supply the potential bedload in the lower domain of the channel, thereby causing a deficit that explains this lack of agreement between potential and real transport.MDPI20192019-11-0120192019-11-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10272/17695reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/176952026-06-02T14:58:11Z
dc.title.none.fl_str_mv Calculated Potential Bedload Versus Real Transported Sands along the Guadiana River Estuary (Spain–Portugal)
title Calculated Potential Bedload Versus Real Transported Sands along the Guadiana River Estuary (Spain–Portugal)
spellingShingle Calculated Potential Bedload Versus Real Transported Sands along the Guadiana River Estuary (Spain–Portugal)
Morales González, Juan Antonio
Guadiana Estuary
Tidal currents
Potential bedload transport
Real sediment input
title_short Calculated Potential Bedload Versus Real Transported Sands along the Guadiana River Estuary (Spain–Portugal)
title_full Calculated Potential Bedload Versus Real Transported Sands along the Guadiana River Estuary (Spain–Portugal)
title_fullStr Calculated Potential Bedload Versus Real Transported Sands along the Guadiana River Estuary (Spain–Portugal)
title_full_unstemmed Calculated Potential Bedload Versus Real Transported Sands along the Guadiana River Estuary (Spain–Portugal)
title_sort Calculated Potential Bedload Versus Real Transported Sands along the Guadiana River Estuary (Spain–Portugal)
dc.creator.none.fl_str_mv Morales González, Juan Antonio
Lozano Guerra-Librero, Claudio
Sedrati, Mouncef
author Morales González, Juan Antonio
author_facet Morales González, Juan Antonio
Lozano Guerra-Librero, Claudio
Sedrati, Mouncef
author_role author
author2 Lozano Guerra-Librero, Claudio
Sedrati, Mouncef
author2_role author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Guadiana Estuary
Tidal currents
Potential bedload transport
Real sediment input
topic Guadiana Estuary
Tidal currents
Potential bedload transport
Real sediment input
description The Guadiana estuary is a coastal system located in the southwest of the Iberian Peninsula and is the natural border between Portugal and Spain. It is a rock-bounded estuary which extends along more than 40 km and is characterized by a semidiurnal mesotidal regime. This paper represents an approach to the bedload transport across two flow sections located in the fluvial and marine domains. In the fluvial profile, the most frequent bedform is the plane bed. In the marine area the bed of the deep channel is composed of well-sorted sand, while a lateral bar displays partially cohesive sediments with dominant fine sands in a matrix of clayey silts. Data were acquired during spring and neap tides. Near-bottom water velocities were registered by an acoustic Doppler current profiler (ADCP). Density and bed rugosity were determined in sediment samples. These data were employed using Bagnold’s equation (1963) to quantify the potential bedload (Qb). Further, real bedload values (Sb) were obtained by using Poliako traps. The comparison of the results of Qb under both ebb and flood conditions demonstrated a clear river-to-sea net transport in both sectors. The values of Sb were lower than those of Qb in every condition. The sand input across the fluvial estuary cannot supply the potential bedload in the lower domain of the channel, thereby causing a deficit that explains this lack of agreement between potential and real transport.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-11-01
2019
2019-11-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10272/17695
url http://hdl.handle.net/10272/17695
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
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