Water and sediment fluxes on the Ebro Delta shoreface: on the role of low frequency currents

Water and sediment fluxes on the Ebro Delta shoreface: on the role of low frequency currents

21 pages, 11 figures, 1 table

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Bibliographic Details
Main Authors: Jiménez-Quintana, José Antonio, Guillén, Jorge, Gràcia, Vicenç, Palanques, Albert, García, Marc A., Sánchez-Arcilla, Agustín, Puig, Pere, Puigdefàbregas, Joan, Rodríguez, G.
Format: artículo biblioteca
Published: Elsevier 1999-05
Subjects:Ebro Delta, Shoreface, Sediment transport, Hydrography, Currents, Storms,
Online Access:http://hdl.handle.net/10261/243729
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spelling dig-icm-es-10261-2437292021-06-16T10:35:51Z Water and sediment fluxes on the Ebro Delta shoreface: on the role of low frequency currents Jiménez-Quintana, José Antonio Guillén, Jorge Gràcia, Vicenç Palanques, Albert García, Marc A. Sánchez-Arcilla, Agustín Puig, Pere Puigdefàbregas, Joan Rodríguez, G. Ebro Delta Shoreface Sediment transport Hydrography Currents Storms 21 pages, 11 figures, 1 table Field measurements of water and sediment fluxes were acquired on the Ebro Delta shoreface at depths of 8.5 and 12.5 m during winter. This period was characterised by high river discharges, a dominant NW wind and the presence of six wave storms. The survey can be considered as being typical of high-energy conditions. Water fluxes on the shoreface were jointly dominated by mesoscale shelf processes (anticyclonic gyre on the Ebro shelf) inducing a dominant northward flow and by local meteorological forcing (N-NE winds), inducing southward current reversals, which were 'coupled' with the presence of E wave storms. The concentration of suspended sediment in the water column was associated with wave activity, i.e. wave-induced near-bottom velocity. Moreover, a lag of 6 h was found between the concentration time series at both locations, which was associated with a slow seaward advection of fine sediment. As a result of this advection, an increase of 30% in the content of fines of the bottom sediment at the deepest location was detected during the survey period. Measured sediment fluxes presented a pulsating structure related to mean current fluctuations and fluctuations in sediment concentration induced by waves. Longshore transport rates were dominant over cross-shore rates. When time integrated, the net cross-shore fluxes were offshore at the outer site and onshore at the inner site, due to differences in current direction, since it shifted towards the coast at the shallower location. Net longshore transport was almost nil when current reversals were present, and when disappeared, transport at the inner shelf was northward This work has been done in the framework of the FANS project. It was partly supported by the EC MAST-III Research Programme, Directorate General for Science, Research and Development under Contract No. MAS3-CT95-0037 and by the Spanish Interministerial Science and Technology Commission, MAR96-2268-C03-01-CE. Part of the work of JAJ, VG and ASA was done in the framework of the EU-funded PACE research project (MAST-III Programme, No. MAS3-CT95-0002), the Spanish Interministerial Science and Technology Commission (IN96-0198) and the Universities and Research Commission of the Generalitat of Catalonia, (PIRB1996-00019) 2021-06-16T10:30:09Z 2021-06-16T10:30:09Z 1999-05 2021-06-16T10:30:10Z artículo http://purl.org/coar/resource_type/c_6501 issn: 0025-3227 Marine Geology 157(3-4): 219-239 (1999) http://hdl.handle.net/10261/243729 10.1016/S0025-3227(98)00153-4 https://doi.org/10.1016/S0025-3227(98)00153-4 Sí none Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
topic Ebro Delta
Shoreface
Sediment transport
Hydrography
Currents
Storms
Ebro Delta
Shoreface
Sediment transport
Hydrography
Currents
Storms
spellingShingle Ebro Delta
Shoreface
Sediment transport
Hydrography
Currents
Storms
Ebro Delta
Shoreface
Sediment transport
Hydrography
Currents
Storms
Jiménez-Quintana, José Antonio
Guillén, Jorge
Gràcia, Vicenç
Palanques, Albert
García, Marc A.
Sánchez-Arcilla, Agustín
Puig, Pere
Puigdefàbregas, Joan
Rodríguez, G.
Water and sediment fluxes on the Ebro Delta shoreface: on the role of low frequency currents
description 21 pages, 11 figures, 1 table
format artículo
topic_facet Ebro Delta
Shoreface
Sediment transport
Hydrography
Currents
Storms
author Jiménez-Quintana, José Antonio
Guillén, Jorge
Gràcia, Vicenç
Palanques, Albert
García, Marc A.
Sánchez-Arcilla, Agustín
Puig, Pere
Puigdefàbregas, Joan
Rodríguez, G.
author_facet Jiménez-Quintana, José Antonio
Guillén, Jorge
Gràcia, Vicenç
Palanques, Albert
García, Marc A.
Sánchez-Arcilla, Agustín
Puig, Pere
Puigdefàbregas, Joan
Rodríguez, G.
author_sort Jiménez-Quintana, José Antonio
title Water and sediment fluxes on the Ebro Delta shoreface: on the role of low frequency currents
title_short Water and sediment fluxes on the Ebro Delta shoreface: on the role of low frequency currents
title_full Water and sediment fluxes on the Ebro Delta shoreface: on the role of low frequency currents
title_fullStr Water and sediment fluxes on the Ebro Delta shoreface: on the role of low frequency currents
title_full_unstemmed Water and sediment fluxes on the Ebro Delta shoreface: on the role of low frequency currents
title_sort water and sediment fluxes on the ebro delta shoreface: on the role of low frequency currents
publisher Elsevier
publishDate 1999-05
url http://hdl.handle.net/10261/243729
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