Dynamics of Turbid Plumes Generated by Marine Aggregate Dredging: An Example of a Macrotidal Environment (the Bay of Seine, France)
Identifieur interne : 000447 ( Main/Exploration ); précédent : 000446; suivant : 000448Dynamics of Turbid Plumes Generated by Marine Aggregate Dredging: An Example of a Macrotidal Environment (the Bay of Seine, France)
Auteurs : P. A. Duclos [France] ; R. Lafite [France] ; S. Le Bot [France] ; F. Rivoalen [France] ; A. Cuvillier [France]Source :
- Journal of Coastal Research [ 0749-0208 ] ; 2013.
English descriptors
- mix :
Abstract
On the French marine shelf, marine aggregates are currently dredged by trailing suction hopper dredgers (TSHD), without screening, with an overflow process, with or against currents. In the framework of the Groupement d'Inter'et Scientifique (GIS) Suivi des Impacts de l'Extraction de Granulats Marins (SIEGMA), the dynamics of the turbid plume formed by the overflow was studied at an experimental dredging site (0.6 km2), located in the Bay of Seine (eastern English Channel), a macrotidal environment where the seabed is composed of sandy gravel. An original field strategy based on Lagrangian monitoring, using the back-scattered signal of an Acoustic Doppler Current Profiler (ADCP), Laser In Situ Scattering and Transmissometry (LISST) measurements, water samples, and aerial photographs, has shown good results in describing suspended sediment concentration (SSC) dynamics from a turbid plume. The behaviour of suspended sediment has been studied, for the first time, to our knowledge, from their release at the dredger overflow to their deposition on the seabed. A fluid mixture, overflowed from the TSHD, with a mean concentration of 6 g L 1 of mineral and organic silty sands, induces the formation of a turbid plume at the rear of the TSHD, with an immediate dilution effect about 10-100 on SSC. Then, the SSC decreases through the process of lateral dispersion and sedimentation until the plume disappear in 2 hours. Evolution of the plume characteristics (SSC, particle size and nature, geometry) makes it possible to quantify the processes involved: dilution, advection, dispersion, and settling. The passive and dynamic behaviours of the plume are analysed. Extensions of deposits are calculated for spring tide conditions: 800 m for sand and 6.5 km for silt. This study has been conducted in macrotidal and specific dredging conditions (orientation of the dredging tracks against currents, dredger speed, loading capacity, overflow type), whose effects on plume dispersion have been quantified. Indicators relative to the effect of the plume on the water column (I/R) and to the plume duration (T1.25SSC) are proposed.
Url:
DOI: 10.2112/JCOASTRES-D-12-00148.
Affiliations:
- France
- Basse-Normandie, Haute-Normandie, Région Normandie
- Caen, Rouen
- Université de Caen Basse-Normandie, Université de Rouen
Links toward previous steps (curation, corpus...)
- to stream Hal, to step Corpus: 000103
- to stream Hal, to step Curation: 000103
- to stream Hal, to step Checkpoint: 000270
- to stream Main, to step Merge: 000446
- to stream Main, to step Curation: 000447
Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Dynamics of Turbid Plumes Generated by Marine Aggregate Dredging: An Example of a Macrotidal Environment (the Bay of Seine, France)</title><author><name sortKey="Duclos, P A" sort="Duclos, P A" uniqKey="Duclos P" first="P. A." last="Duclos">P. A. Duclos</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-847" status="VALID"><orgName>Morphodynamique continentale et côtière</orgName><orgName type="acronym">MCC</orgName><desc><address><addrLine>24 Rue des tilleuls 14000 CAEN</addrLine><country key="FR"></country></address><ref type="url">http://WWW.geos.unicaen.fr</ref></desc><listRelation><relation active="#struct-300045" type="direct"></relation><relation active="#struct-300266" type="direct"></relation><relation active="#struct-300318" type="direct"></relation><relation name="UMR6143" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID"><orgName>INSU</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300266" type="direct"><org type="institution" xml:id="struct-300266" status="INCOMING"><orgName>Université de Caen Basse-Normandie</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300318" type="direct"><org type="institution" xml:id="struct-300318" status="VALID"><orgName>Université de Rouen</orgName><desc><address><addrLine> 1 rue Thomas Becket - 76821 Mont-Saint-Aignan</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-rouen.fr/</ref></desc></org></tutelle><tutelle name="UMR6143" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Caen</settlement><region type="region" nuts="2">Basse-Normandie</region></placeName><orgName type="university">Université de Caen Basse-Normandie</orgName><placeName><settlement type="city">Rouen</settlement><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region></placeName><orgName type="university">Université de Rouen</orgName></affiliation></author><author><name sortKey="Lafite, R" sort="Lafite, R" uniqKey="Lafite R" first="R." last="Lafite">R. Lafite</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-847" status="VALID"><orgName>Morphodynamique continentale et côtière</orgName><orgName type="acronym">MCC</orgName><desc><address><addrLine>24 Rue des tilleuls 14000 CAEN</addrLine><country key="FR"></country></address><ref type="url">http://WWW.geos.unicaen.fr</ref></desc><listRelation><relation active="#struct-300045" type="direct"></relation><relation active="#struct-300266" type="direct"></relation><relation active="#struct-300318" type="direct"></relation><relation name="UMR6143" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID"><orgName>INSU</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300266" type="direct"><org type="institution" xml:id="struct-300266" status="INCOMING"><orgName>Université de Caen Basse-Normandie</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300318" type="direct"><org type="institution" xml:id="struct-300318" status="VALID"><orgName>Université de Rouen</orgName><desc><address><addrLine> 1 rue Thomas Becket - 76821 Mont-Saint-Aignan</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-rouen.fr/</ref></desc></org></tutelle><tutelle name="UMR6143" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Caen</settlement><region type="region" nuts="2">Basse-Normandie</region></placeName><orgName type="university">Université de Caen Basse-Normandie</orgName><placeName><settlement type="city">Rouen</settlement><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region></placeName><orgName type="university">Université de Rouen</orgName></affiliation></author><author><name sortKey="Le Bot, S" sort="Le Bot, S" uniqKey="Le Bot S" first="S." last="Le Bot">S. Le Bot</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-847" status="VALID"><orgName>Morphodynamique continentale et côtière</orgName><orgName type="acronym">MCC</orgName><desc><address><addrLine>24 Rue des tilleuls 14000 CAEN</addrLine><country key="FR"></country></address><ref type="url">http://WWW.geos.unicaen.fr</ref></desc><listRelation><relation active="#struct-300045" type="direct"></relation><relation active="#struct-300266" type="direct"></relation><relation active="#struct-300318" type="direct"></relation><relation name="UMR6143" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID"><orgName>INSU</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300266" type="direct"><org type="institution" xml:id="struct-300266" status="INCOMING"><orgName>Université de Caen Basse-Normandie</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300318" type="direct"><org type="institution" xml:id="struct-300318" status="VALID"><orgName>Université de Rouen</orgName><desc><address><addrLine> 1 rue Thomas Becket - 76821 Mont-Saint-Aignan</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-rouen.fr/</ref></desc></org></tutelle><tutelle name="UMR6143" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Caen</settlement><region type="region" nuts="2">Basse-Normandie</region></placeName><orgName type="university">Université de Caen Basse-Normandie</orgName><placeName><settlement type="city">Rouen</settlement><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region></placeName><orgName type="university">Université de Rouen</orgName></affiliation></author><author><name sortKey="Rivoalen, F" sort="Rivoalen, F" uniqKey="Rivoalen F" first="F." last="Rivoalen">F. Rivoalen</name><affiliation wicri:level="1"><hal:affiliation type="department" xml:id="struct-301288" status="VALID"><orgName>Institut National des Sciences Appliquées - Rouen</orgName><orgName type="acronym">INSA Rouen</orgName><desc><address><country key="FR"></country></address></desc><listRelation><relation active="#struct-301232" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-301232" type="direct"><org type="institution" xml:id="struct-301232" status="VALID"><orgName>Institut National des Sciences Appliquées</orgName><orgName type="acronym">INSA</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle></tutelles></hal:affiliation><country>France</country></affiliation></author><author><name sortKey="Cuvillier, A" sort="Cuvillier, A" uniqKey="Cuvillier A" first="A." last="Cuvillier">A. Cuvillier</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-241668" status="INCOMING"><orgName>CNRS, UMR 6294 LOMC</orgName><desc><address><addrLine>76600 Le Havre, France</addrLine><country key="FR"></country></address></desc><listRelation><relation name="UMR 6294 LOMC 76600 LE HAVRE, FRANCE" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle name="UMR 6294 LOMC 76600 LE HAVRE, FRANCE" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">HAL</idno><idno type="RBID">Hal:hal-00931886</idno><idno type="halId">hal-00931886</idno><idno type="halUri">https://hal.archives-ouvertes.fr/hal-00931886</idno><idno type="url">https://hal.archives-ouvertes.fr/hal-00931886</idno><idno type="doi">10.2112/JCOASTRES-D-12-00148.</idno><date when="2013">2013</date><idno type="wicri:Area/Hal/Corpus">000103</idno><idno type="wicri:Area/Hal/Curation">000103</idno><idno type="wicri:Area/Hal/Checkpoint">000270</idno><idno type="wicri:doubleKey">0749-0208:2013:Duclos P:dynamics:of:turbid</idno><idno type="wicri:Area/Main/Merge">000446</idno><idno type="wicri:Area/Main/Curation">000447</idno><idno type="wicri:Area/Main/Exploration">000447</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Dynamics of Turbid Plumes Generated by Marine Aggregate Dredging: An Example of a Macrotidal Environment (the Bay of Seine, France)</title><author><name sortKey="Duclos, P A" sort="Duclos, P A" uniqKey="Duclos P" first="P. A." last="Duclos">P. A. Duclos</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-847" status="VALID"><orgName>Morphodynamique continentale et côtière</orgName><orgName type="acronym">MCC</orgName><desc><address><addrLine>24 Rue des tilleuls 14000 CAEN</addrLine><country key="FR"></country></address><ref type="url">http://WWW.geos.unicaen.fr</ref></desc><listRelation><relation active="#struct-300045" type="direct"></relation><relation active="#struct-300266" type="direct"></relation><relation active="#struct-300318" type="direct"></relation><relation name="UMR6143" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID"><orgName>INSU</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300266" type="direct"><org type="institution" xml:id="struct-300266" status="INCOMING"><orgName>Université de Caen Basse-Normandie</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300318" type="direct"><org type="institution" xml:id="struct-300318" status="VALID"><orgName>Université de Rouen</orgName><desc><address><addrLine> 1 rue Thomas Becket - 76821 Mont-Saint-Aignan</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-rouen.fr/</ref></desc></org></tutelle><tutelle name="UMR6143" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Caen</settlement><region type="region" nuts="2">Basse-Normandie</region></placeName><orgName type="university">Université de Caen Basse-Normandie</orgName><placeName><settlement type="city">Rouen</settlement><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region></placeName><orgName type="university">Université de Rouen</orgName></affiliation></author><author><name sortKey="Lafite, R" sort="Lafite, R" uniqKey="Lafite R" first="R." last="Lafite">R. Lafite</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-847" status="VALID"><orgName>Morphodynamique continentale et côtière</orgName><orgName type="acronym">MCC</orgName><desc><address><addrLine>24 Rue des tilleuls 14000 CAEN</addrLine><country key="FR"></country></address><ref type="url">http://WWW.geos.unicaen.fr</ref></desc><listRelation><relation active="#struct-300045" type="direct"></relation><relation active="#struct-300266" type="direct"></relation><relation active="#struct-300318" type="direct"></relation><relation name="UMR6143" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID"><orgName>INSU</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300266" type="direct"><org type="institution" xml:id="struct-300266" status="INCOMING"><orgName>Université de Caen Basse-Normandie</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300318" type="direct"><org type="institution" xml:id="struct-300318" status="VALID"><orgName>Université de Rouen</orgName><desc><address><addrLine> 1 rue Thomas Becket - 76821 Mont-Saint-Aignan</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-rouen.fr/</ref></desc></org></tutelle><tutelle name="UMR6143" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Caen</settlement><region type="region" nuts="2">Basse-Normandie</region></placeName><orgName type="university">Université de Caen Basse-Normandie</orgName><placeName><settlement type="city">Rouen</settlement><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region></placeName><orgName type="university">Université de Rouen</orgName></affiliation></author><author><name sortKey="Le Bot, S" sort="Le Bot, S" uniqKey="Le Bot S" first="S." last="Le Bot">S. Le Bot</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-847" status="VALID"><orgName>Morphodynamique continentale et côtière</orgName><orgName type="acronym">MCC</orgName><desc><address><addrLine>24 Rue des tilleuls 14000 CAEN</addrLine><country key="FR"></country></address><ref type="url">http://WWW.geos.unicaen.fr</ref></desc><listRelation><relation active="#struct-300045" type="direct"></relation><relation active="#struct-300266" type="direct"></relation><relation active="#struct-300318" type="direct"></relation><relation name="UMR6143" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-300045" type="direct"><org type="institution" xml:id="struct-300045" status="VALID"><orgName>INSU</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300266" type="direct"><org type="institution" xml:id="struct-300266" status="INCOMING"><orgName>Université de Caen Basse-Normandie</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300318" type="direct"><org type="institution" xml:id="struct-300318" status="VALID"><orgName>Université de Rouen</orgName><desc><address><addrLine> 1 rue Thomas Becket - 76821 Mont-Saint-Aignan</addrLine><country key="FR"></country></address><ref type="url">http://www.univ-rouen.fr/</ref></desc></org></tutelle><tutelle name="UMR6143" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Caen</settlement><region type="region" nuts="2">Basse-Normandie</region></placeName><orgName type="university">Université de Caen Basse-Normandie</orgName><placeName><settlement type="city">Rouen</settlement><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region></placeName><orgName type="university">Université de Rouen</orgName></affiliation></author><author><name sortKey="Rivoalen, F" sort="Rivoalen, F" uniqKey="Rivoalen F" first="F." last="Rivoalen">F. Rivoalen</name><affiliation wicri:level="1"><hal:affiliation type="department" xml:id="struct-301288" status="VALID"><orgName>Institut National des Sciences Appliquées - Rouen</orgName><orgName type="acronym">INSA Rouen</orgName><desc><address><country key="FR"></country></address></desc><listRelation><relation active="#struct-301232" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-301232" type="direct"><org type="institution" xml:id="struct-301232" status="VALID"><orgName>Institut National des Sciences Appliquées</orgName><orgName type="acronym">INSA</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle></tutelles></hal:affiliation><country>France</country></affiliation></author><author><name sortKey="Cuvillier, A" sort="Cuvillier, A" uniqKey="Cuvillier A" first="A." last="Cuvillier">A. Cuvillier</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-241668" status="INCOMING"><orgName>CNRS, UMR 6294 LOMC</orgName><desc><address><addrLine>76600 Le Havre, France</addrLine><country key="FR"></country></address></desc><listRelation><relation name="UMR 6294 LOMC 76600 LE HAVRE, FRANCE" active="#struct-441569" type="direct"></relation></listRelation><tutelles><tutelle name="UMR 6294 LOMC 76600 LE HAVRE, FRANCE" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country></affiliation></author></analytic><idno type="DOI">10.2112/JCOASTRES-D-12-00148.</idno><series><title level="j">Journal of Coastal Research</title><idno type="ISSN">0749-0208</idno><imprint><date type="datePub">2013</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>Aggregates</term><term>dredging</term><term>eastern English Channel</term><term>eastern English Channel.</term><term>environmental impact</term><term>sediments</term><term>turbid plumes</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">On the French marine shelf, marine aggregates are currently dredged by trailing suction hopper dredgers (TSHD), without screening, with an overflow process, with or against currents. In the framework of the Groupement d'Inter'et Scientifique (GIS) Suivi des Impacts de l'Extraction de Granulats Marins (SIEGMA), the dynamics of the turbid plume formed by the overflow was studied at an experimental dredging site (0.6 km2), located in the Bay of Seine (eastern English Channel), a macrotidal environment where the seabed is composed of sandy gravel. An original field strategy based on Lagrangian monitoring, using the back-scattered signal of an Acoustic Doppler Current Profiler (ADCP), Laser In Situ Scattering and Transmissometry (LISST) measurements, water samples, and aerial photographs, has shown good results in describing suspended sediment concentration (SSC) dynamics from a turbid plume. The behaviour of suspended sediment has been studied, for the first time, to our knowledge, from their release at the dredger overflow to their deposition on the seabed. A fluid mixture, overflowed from the TSHD, with a mean concentration of 6 g L 1 of mineral and organic silty sands, induces the formation of a turbid plume at the rear of the TSHD, with an immediate dilution effect about 10-100 on SSC. Then, the SSC decreases through the process of lateral dispersion and sedimentation until the plume disappear in 2 hours. Evolution of the plume characteristics (SSC, particle size and nature, geometry) makes it possible to quantify the processes involved: dilution, advection, dispersion, and settling. The passive and dynamic behaviours of the plume are analysed. Extensions of deposits are calculated for spring tide conditions: 800 m for sand and 6.5 km for silt. This study has been conducted in macrotidal and specific dredging conditions (orientation of the dredging tracks against currents, dredger speed, loading capacity, overflow type), whose effects on plume dispersion have been quantified. Indicators relative to the effect of the plume on the water column (I/R) and to the plume duration (T1.25SSC) are proposed.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Basse-Normandie</li><li>Haute-Normandie</li><li>Région Normandie</li></region><settlement><li>Caen</li><li>Rouen</li></settlement><orgName><li>Université de Caen Basse-Normandie</li><li>Université de Rouen</li></orgName></list><tree><country name="France"><region name="Basse-Normandie"><name sortKey="Duclos, P A" sort="Duclos, P A" uniqKey="Duclos P" first="P. A." last="Duclos">P. A. Duclos</name></region><name sortKey="Cuvillier, A" sort="Cuvillier, A" uniqKey="Cuvillier A" first="A." last="Cuvillier">A. Cuvillier</name><name sortKey="Lafite, R" sort="Lafite, R" uniqKey="Lafite R" first="R." last="Lafite">R. Lafite</name><name sortKey="Le Bot, S" sort="Le Bot, S" uniqKey="Le Bot S" first="S." last="Le Bot">S. Le Bot</name><name sortKey="Rivoalen, F" sort="Rivoalen, F" uniqKey="Rivoalen F" first="F." last="Rivoalen">F. Rivoalen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/France/explor/LeHavreV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000447 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000447 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/France
|area= LeHavreV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= Hal:hal-00931886
|texte= Dynamics of Turbid Plumes Generated by Marine Aggregate Dredging: An Example of a Macrotidal Environment (the Bay of Seine, France)
}}
| This area was generated with Dilib version V0.6.25. |  |