Modelling the Turbidity Maximum in the Seine Estuary (France): Identification of Formation Processes
Identifieur interne : 001158 ( France/Analysis ); précédent : 001157; suivant : 001159Modelling the Turbidity Maximum in the Seine Estuary (France): Identification of Formation Processes
Auteurs : I. Brenon [France] ; P. Le Hir [France]Source :
- Estuarine, Coastal and Shelf Science [ 0272-7714 ] ; 1999.
English descriptors
- KwdEn :
Abstract
A two-dimensional depth-averaged model and a three-dimensional model for tide propagation and fine sediment transport are used to determine the respective role of several processes on the turbidity maximum behaviour in the Seine estuary. Consolidation processes have been taken into account in the 2DH model. Despite simplified sedimentological formulations and even without any gravitational effect, a turbidity maximum, close to the observations, is reproduced during spring tides. This result confirms the large contribution of tidal pumping on the turbidity maximum formation. The sediment behaviour (settling, erodability) acts in modifying the concentration and location of the tidal-induced turbidity maximum. The bathymetry influences the tidal propagation, but also the location of deposited sediment patterns and consequently, modifies the location of the turbidity maximum. The three-dimensional model allows accounting for all the forcing while the 2DH model does not include the salinity gradients and thus the density circulation, nor the vertical profile of velocity and concentration, which change the deposited sediment distribution. Density gradients act in maintaining the fine sediment in the estuary and in stretching the dynamical accumulation towards the upper limit of the salinity gradients. The turbidity maximum results from the superposition of both processes: (a) the dynamical accumulation of suspended sediment, related to tidal pumping and river flow, modelled by bathymetry and dependent on sediment behaviour, (b) salinity gradients, only related to river flow and bathymetry, which modify its structure.
Url:
DOI: 10.1006/ecss.1999.0514
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001949
- to stream Istex, to step Curation: 001949
- to stream Istex, to step Checkpoint: 000B02
- to stream Main, to step Merge: 001B42
- to stream Main, to step Curation: 001A93
- to stream Main, to step Exploration: 001A93
- to stream France, to step Extraction: 001158
Links to Exploration step
ISTEX:F6206C98210D8B602FFAB0EC84019472F2657FABLe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Modelling the Turbidity Maximum in the Seine Estuary (France): Identification of Formation Processes</title>
<author><name sortKey="Brenon, I" sort="Brenon, I" uniqKey="Brenon I" first="I." last="Brenon">I. Brenon</name>
</author>
<author><name sortKey="Le Hir, P" sort="Le Hir, P" uniqKey="Le Hir P" first="P." last="Le Hir">P. Le Hir</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:F6206C98210D8B602FFAB0EC84019472F2657FAB</idno>
<date when="1999" year="1999">1999</date>
<idno type="doi">10.1006/ecss.1999.0514</idno>
<idno type="url">https://api.istex.fr/document/F6206C98210D8B602FFAB0EC84019472F2657FAB/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">001949</idno>
<idno type="wicri:Area/Istex/Curation">001949</idno>
<idno type="wicri:Area/Istex/Checkpoint">000B02</idno>
<idno type="wicri:doubleKey">0272-7714:1999:Brenon I:modelling:the:turbidity</idno>
<idno type="wicri:Area/Main/Merge">001B42</idno>
<idno type="wicri:Area/Main/Curation">001A93</idno>
<idno type="wicri:Area/Main/Exploration">001A93</idno>
<idno type="wicri:Area/France/Extraction">001158</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Modelling the Turbidity Maximum in the Seine Estuary (France): Identification of Formation Processes</title>
<author><name sortKey="Brenon, I" sort="Brenon, I" uniqKey="Brenon I" first="I." last="Brenon">I. Brenon</name>
<affiliation wicri:level="3"><country xml:lang="fr">France</country>
<wicri:regionArea>Direction de L'Environnement et de l'Aménagement Littoral, IFREMER/Centre de BREST, B.P. 70, 29280, Plouzané</wicri:regionArea>
<placeName><region type="region" nuts="2">Région Bretagne</region>
<settlement type="city">Plouzané</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Le Hir, P" sort="Le Hir, P" uniqKey="Le Hir P" first="P." last="Le Hir">P. Le Hir</name>
<affiliation wicri:level="3"><country xml:lang="fr">France</country>
<wicri:regionArea>Direction de L'Environnement et de l'Aménagement Littoral, IFREMER/Centre de BREST, B.P. 70, 29280, Plouzané</wicri:regionArea>
<placeName><region type="region" nuts="2">Région Bretagne</region>
<settlement type="city">Plouzané</settlement>
</placeName>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Estuarine, Coastal and Shelf Science</title>
<title level="j" type="abbrev">YECSS</title>
<idno type="ISSN">0272-7714</idno>
<imprint><publisher>ELSEVIER</publisher>
<date type="published" when="1999">1999</date>
<biblScope unit="volume">49</biblScope>
<biblScope unit="issue">4</biblScope>
<biblScope unit="page" from="525">525</biblScope>
<biblScope unit="page" to="544">544</biblScope>
</imprint>
<idno type="ISSN">0272-7714</idno>
</series>
<idno type="istex">F6206C98210D8B602FFAB0EC84019472F2657FAB</idno>
<idno type="DOI">10.1006/ecss.1999.0514</idno>
<idno type="PII">S0272-7714(99)90514-0</idno>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0272-7714</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Seine estuary (France)</term>
<term>deposit patterns</term>
<term>modelling</term>
<term>morphological effects</term>
<term>salinity gradients</term>
<term>sediment behaviour</term>
<term>tidal pumping</term>
<term>turbidity maximum</term>
</keywords>
</textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">A two-dimensional depth-averaged model and a three-dimensional model for tide propagation and fine sediment transport are used to determine the respective role of several processes on the turbidity maximum behaviour in the Seine estuary. Consolidation processes have been taken into account in the 2DH model. Despite simplified sedimentological formulations and even without any gravitational effect, a turbidity maximum, close to the observations, is reproduced during spring tides. This result confirms the large contribution of tidal pumping on the turbidity maximum formation. The sediment behaviour (settling, erodability) acts in modifying the concentration and location of the tidal-induced turbidity maximum. The bathymetry influences the tidal propagation, but also the location of deposited sediment patterns and consequently, modifies the location of the turbidity maximum. The three-dimensional model allows accounting for all the forcing while the 2DH model does not include the salinity gradients and thus the density circulation, nor the vertical profile of velocity and concentration, which change the deposited sediment distribution. Density gradients act in maintaining the fine sediment in the estuary and in stretching the dynamical accumulation towards the upper limit of the salinity gradients. The turbidity maximum results from the superposition of both processes: (a) the dynamical accumulation of suspended sediment, related to tidal pumping and river flow, modelled by bathymetry and dependent on sediment behaviour, (b) salinity gradients, only related to river flow and bathymetry, which modify its structure.</div>
</front>
</TEI>
<affiliations><list><country><li>France</li>
</country>
<region><li>Région Bretagne</li>
</region>
<settlement><li>Plouzané</li>
</settlement>
</list>
<tree><country name="France"><region name="Région Bretagne"><name sortKey="Brenon, I" sort="Brenon, I" uniqKey="Brenon I" first="I." last="Brenon">I. Brenon</name>
</region>
<name sortKey="Le Hir, P" sort="Le Hir, P" uniqKey="Le Hir P" first="P." last="Le Hir">P. Le Hir</name>
</country>
</tree>
</affiliations>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/France/explor/LeHavreV1/Data/France/Analysis
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001158 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/France/Analysis/biblio.hfd -nk 001158 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/France |area= LeHavreV1 |flux= France |étape= Analysis |type= RBID |clé= ISTEX:F6206C98210D8B602FFAB0EC84019472F2657FAB |texte= Modelling the Turbidity Maximum in the Seine Estuary (France): Identification of Formation Processes }}
This area was generated with Dilib version V0.6.25. |