Revue Paralia最新文献

{"title":"Evolution morphologique récente d'un complexe lagunaire méditerranéen : le système des étangs Palavasiens (France)","authors":"Jérôme Castaings, L. Dezileau, Annie Fiandrino, R. Verney","doi":"10.5150/REVUE-PARALIA.2011.007","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2011.007","url":null,"abstract":"Les lagunes du Golfe du Lion constituent un patrimoine naturel reconnu ainsi qu’un enjeu essentiel pour les activites economiques locales. Leur evolution morphologique est donc une question importante dans le contexte actuel de changements climatiques et environnementaux. L’analyse de donnees topo-bathymetriques du systeme des etangs Palavasiens a permis de mieux cerner son evolution depuis le XVIIIeme siecle. Les actions anthropiques et les apports du bassin versant apparaissent comme les facteurs principaux de l’evolution du systeme. Au cours des 40 dernieres annees, le systeme montre une tendance a se combler lentement avec une accumulation moyenne de 1,3 mm/an. Des differences de fonctionnement sur chacun des etangs sont mises en lumiere en fonction des forcages naturels et anthropiques locaux. Translated version: Recent morphological evolution of a Mediterranean lagoon complex: the Palavasian lakes system (France) Lagoons of the Gulf of Lion, recognized for their natural heritage, are a key challenge for local economic activities. Their morphological evolution is an important issue in the current context of climate and environmental changes. Analysis of topo-bathymetric data of the Palavasian lakes system has helped to clarify its evolution since the XVIIIth century. Human impacts and contributions from the watershed appear to be the main drivers governing the evolution of the system. Over the past 40 years, the system shows a tendency to slowly fill at an accumulation rate of 1.3 mm/year. Differences between lagoons are highlighted according to local natural and anthropogenic forcings. Keywords: Lagoon; Morphology; Bathymetry; Sediment dynamics; Anthropization; Palavasian’s lagoons; Or lagoon.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123189005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyse granulométrique et environnement de dépôts des sables superficiels de la lagune Adjin (Côte d'Ivoire)","authors":"Y. N’Guessan, Valérie Wognin, A. Coulibaly, S. Monde, Ted-Edgard Wango, K. Aka","doi":"10.5150/REVUE-PARALIA.2011.006","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2011.006","url":null,"abstract":"Les analyses granulometriques et les leves bathymetriques effectues en lagune Adjin, ont permis de caracteriser les sediments sableux et la morphologie du fond de cette lagune. Sur le fond de la lagune, les sediments sont constitues majoritairement de vases localisees dans les fonds lagunaires alors que sur la bordure de la lagune, on rencontre essentiellement des sables. Les galets et les graviers se localisent par endroit, sur le pourtour de la lagune, et a proximite des debouches des rivieres Djibi et Bete. L’essentiel des sables de la lagune Adjin provient d’un environnement de type rivieres. La majorite des sables se deplace par saltation. Le mode de transport des sables fins est domine par le transport par suspension. Les sables moyens se deplacent essentiellement par saltation. Le transport par roulement est le mode de transport dominant des sables grossiers. Cette etude a permis de realiser les cartes bathymetriques et de repartition des sediments, ainsi que la determination de l’environnement de depots des sables. Translated version: Granulometric analysis and environment of deposits of superficial sands of the Adjin lagoon (Cote d’Ivoire) The grading analysis and the bathymetric surveys made in Adjin lagoon, allowed to characterize sandy sediments and morphology of the bottom of this lagoon. On the bottom of the lagoon, sediments are mainly constituted by mud located at the bottom while on the border of the lagoon, we essentially meet sands. Pebbles and gravels are located at certain points around the lagoon, and near the outlets of Djibi and Bete Rivers. Most of the sands of the Adjin lagoon result from a riverine type of environment. The majority of sands move by saltation. The means of transportation of fine sands is dominated by suspension. Mean sands move essentially by saltation. Rolling transport is the dominant transportation for coarse sands. This study allowed to realize bathymetric maps and sediment distribution maps, as well as the determination of the deposit environment of sands. Keywords: Sedimentary cover; Sands; Mud; Particle size distribution; Bathymetry; Adjin lagoon.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133244516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Caractérisation et valorisation des sédiments de dragage des ports de Tanger et Larache (Maroc)","authors":"Laïla Ben Allal, M. Ammari, Ikram Frar, A. Azmani, Nour Eddine Belmokhtar","doi":"10.5150/REVUE-PARALIA.2011.005","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2011.005","url":null,"abstract":"Le present travail se place dans une demarche de gestion durable des sediments de dragage portuaire en etudiant le comportement de ces materiaux pour les valoriser efficacement dans le secteur de la construction, domaine privilegie par cette etude. Une caracterisation complete des sediments de dragage des ports de Tanger et de Larache a ete realisee a partir d’analyses chimiques, physiques et environnementales. L’etude des proprietes physiques de ces sediments a revele que ces sediments sont generalement des materiaux fins 0/1mm. La caracterisation chimique de ces memes sediments a permis d’evaluer leur potentiel polluant. On a note l’absence de pollution metallique. La premiere filiere de valorisation de type materiau de construction a concerne les mortiers par substitution du sable par des sediments de dragage. Les valeurs des resistances a la compression obtenues ont confirme qu’une substitution partielle du sable par des sediments de dragage des ports de Tanger et de Larache dans les mortiers est satisfaisante pour un dosage de 20%. La valorisation des sediments dans la fabrication des briques constitue la deuxieme voie de valorisation exploree. La faisabilite technologique de briques renfermant des sediments de Larache a ete demontree par des essais preliminaires en briqueterie. Pour ces briques, la composition retenue est de 70% de sediment. Deux filieres de valorisation sont potentiellement envisageables. Ainsi les sediments de dragage portuaire peuvent constituer une source de matieres premieres interessante pour un secteur consommateur de granulats et de materiaux elabores qu’est le secteur de la construction. Translated version: Characterization and valorisation of dredged harbours sediments from Tangier and Larache (Morocco) This work falls under the process of sustainable management of dredged harbour sediments by studying the behaviour of these materials for valorising them effectively in the construction sector, the interesting field in this study. A complete characterization of sediments dredged from the ports of Tangier and Larache was carried out from chemical, physical and environmental analyses. The study of the physical properties of these sediments revealed that these sediments are generally fine material 0/1mm. Chemical characterization of these sediments was used to evaluate potential pollutant. The absence of metal pollution was noted. The first sector of valorisation is the field of building materials which has involved mortars by replacing the sand by dredged sediments. The values of compressive strength obtained have confirmed that a partial substitution of sand by dredged sediments from the ports of Tangier and Larache in mortars is satisfactory for a strength of 20%. The valorisation of sediments in bricks manufacturing is the second track explored. Technological feasibility of bricks containing sediments from the port of Larache was demonstrated by preliminary tests in a brickyard. For these bricks, the composition c","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132994527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Valorisation en unité pilote de sédiments méditerranéens : étude des caractéristiques géotechniques et de la perméabilité","authors":"D. Levacher, Martín Sánchez, Zhibo Duan, Yingjie Liang","doi":"10.5150/REVUE-PARALIA.2011.004","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2011.004","url":null,"abstract":"Les sediments marins trouvent leur reemploi avec ou sans traitement dans la construction d’ouvrages portuaires et routiers. Ces applications imposent toute une methodologie pour leur caracterisation hydraulique et mecanique. Cette methodologie est proposee pour le projet SEDIMARD 83 et appliquee a des sediments marins preleves sur 6 sites portuaires de la cote Mediterraneenne. Apres une caracterisation geotechnique elementaire (teneurs en eau initiale, granulometrie, limites d'Atterberg, teneurs en carbonates et matieres organiques) les relations permeabilite - concentration (ou indice des vides) sont etablies a partir d'essais de decantation en colonne et d'essais de consolidation œdometrique. Les essais de decantation en colonne correspondent au tassement sous poids propre du sediment. Les essais de consolidation œdometrique correspondent au tassement de ces memes sediments sous surcharges. Tout d'abord, l'etude des proprietes physiques et chimiques des sediments montre qu'elles varient peu pour une meme region d'origine (Mediterranee). Cependant, un traitement de tri et de separation (sediment brut/sediment dessable/deshydrate) les modifie. L’analyse des resultats des essais de decantation et de consolidation a conduit a l’obtention des parametres classiques de tassement mais aussi a la definition de la relation entre la permeabilite et l’indice des vides. Une continuite a ete bien observee entre les resultats issus de ces deux essais. Translated version: Valorization of Mediterranean sediments in a treatment plant: Study of the geotechnical characterization and permeability The marine sediments find their re-employment with or without treatment in the construction of harbour and road works. These applications impose a complete methodology for the hydraulic and mechanical characterization of sediments. This methodology is proposed for project SEDIMARD 83 and is applied to marine sediments of the Mediterranean coast. After having defined the basic properties of these sediments, column decantation and oedometric tests were carried out on 6 different sediments. The relations between permeability and void index are then deduced. These tests of decantation correspond to a self-weight settlement of the sediment. In order to simulate the consolidation of these same sediments under loading, some oedometric tests were carried out in parallel. First, the physical and chemical properties of these sediments are given and it is shown that certain among them for the same area (the Mediterranean), remain nearly constant. So, dehydration and sieving treatments (raw sediment/desanded sediment/dehydrated sediment) modify them. The analysis led to obtaining the usual settlement parameters of consolidation but also to defining a relation between permeability and void index. Continuity has been well observed between the results issued from these two tests. Keywords: Marine sediment; Physical properties; Chemical properties; Sedimentation; Consolidation; Settlement","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132847550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrodynamique de l’estuaire de la lagune Ebrié (Côte d'Ivoire)","authors":"S. Monde, A. Coulibaly, Ted-Edgard Wango, K. Aka","doi":"10.5150/REVUE-PARALIA.2011.001","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2011.001","url":null,"abstract":"Les baies estuariennes d’Abidjan subissent une forte pression anthropique qui modifie la circulation des masses d’eaux. En outre, ces baies presentent des signes de pollution. Afin de mieux cerner les processus qui s’y deroulent des approches morphobathymetrique et dynamique ont ete mise en œuvre. Il en ressort que les baies estuariennes presentent des morphologies symetriques par rapport a l'axe central de la lagune Ebrie. Dans les chenaux etroits, les courants sont exclusivement alternatifs. Les vitesses des courants dans les baies de Cocody et de Bietri sont decrites. Les evolutions du niveau de l’eau, de la salinite et de la temperature sont etudiees dans la lagune sur 200 jours. Les variations de salinite dans la lagune s’agencent dans les saisons continentale et marine et dependent des fortes precipitations et des crues fluviales. Il en est de meme pour l’evolution de la temperature des eaux qui varie en fonction des precipitations et des debits fluviaux. Translated version: Hydrodynamics of the estuary of the lagoon Ebrie (Cote d'Ivoire) The estuarine bays of Abidjan are under severe anthropogenic pressure which alters the movement of water masses. In addition, these bays are showing signs of pollution. To better understand the processes that take place, morphobathymetric and dynamic approaches have been implemented. It appears that the morphology of estuarine bays is symmetrical about the central axis of the Ebrie lagoon. In narrow channels, the currents are only alternative. Current velocities in Cocody and Bietri Bays are described. The time evolution of water surface level, salinity and temperature are studied in the lagoon over days. Variations in salinity in the lagoon are related to continental and marine seasons and depend on heavy rains and river floods. It is the same for changes in water temperatures that vary according to rainfall and river flows. Keywords: Bay; Estuary; Morphobathymetry; Hydrodynamics; Ebrie Lagoon.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127110787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Méthodologie de recensement des ouvrages de protection contre les aléas côtiers","authors":"A. Roche, Céline Perherin","doi":"10.5150/JNGCGC.2010.074-R","DOIUrl":"https://doi.org/10.5150/JNGCGC.2010.074-R","url":null,"abstract":"Pour repondre a des besoins de securite civile, de gestion du domaine public maritime ou d'evaluation de l'artificialisation du littoral et de ses impacts environnementaux, des recensements d'ouvrages de protection et d'amenagements cotiers sont regulierement realises a des echelles locales. Cependant, il n'existe pas de norme en matiere de methode de recensement de ces ouvrages ni de typologie harmonisee sur l'ensemble du littoral francais permettant une reflexion a l'echelle nationale. Le CETMEF (Centre d'Etudes Techniques Maritimes Et Fluviales) a lance en 2009 une large bibliographie pour recenser les etudes nationales et locales traitant du recensement, du diagnostic et du suivi des ouvrages. Les terminologies employees sont loin d'etre homogenes mais l'ensemble du territoire metropolitain est couvert par des etudes plus ou moins anciennes. Les etudes les plus recentes ont egalement produit des bases de donnees des ouvrages littoraux. L'analyse de ces etudes a conduit le CETMEF a proposer une typologie des ouvrages cotiers simple qui couvre l'ensemble des problematiques liees aux ouvrages et aux territoires. Une methodologie de recensement a egalement ete proposee pour permettre l'uniformisation des recensements, leur compatibilite et agregation au niveau national. Translated version: Methodology for the inventory of coastal defences Inventories of shore protection structures and coastal facilities are regularly undertaken by French local authorities for public security matters, public maritime domain management or environmental concerns. However no standard inventory exists either for the applied method or for the structures' typology, so that present inventory results are not nationally compatible. The French institute for maritime and inland waterways (CETMEF) led in 2009 a large bibliography for inventorying all national and local studies dealing with coastal structures inventory, diagnosis or monitoring. Terms used for nominating the works are not homogeneous but the whole national territory is covered by an inventory and recent studies led to local GIS databases. The CETMEF then proposed a simple coastal structures' typology and an inventory methodology in order to achieve a national database of coastal protection. Keywords: Methodology; Inventory; Coastal defences; Protection structures; Typology; Coastal environment; Artificial coast; Coastal hazards.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114567782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stabilité d’un écoulement cisaillé modélisant la crème de vase","authors":"Alice Harang, Olivier Thual, Pierre Brancher, Thomas Bonometti","doi":"10.5150/REVUE-PARALIA.2010.008","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2010.008","url":null,"abstract":"Afin d'ameliorer la comprehension de la mise en suspension de la vase au fond des estuaires, une etude parametrique de la stabilite d’un ecoulement bidimensionnel cisaille modelisant deux couches fluides miscibles de masse volumique et de viscosite dynamique differentes. Le code de simulation numerique directe JADIM de l'IMFT (Institut de Mecanique des Fluides de Toulouse) est utilise pour calculer l’evolution temporelle de ces ecoulements. Le modele est initialise a l'aide de profils verticaux continus de type erf(z) pour toutes les grandeurs considerees. Cette etude est ensuite completee par une etude de stabilite lineaire realisee avec le code LiSa developpe a l’IMFT. Un nombre de Richardson critique proche de 0,25 est observe. De forts rapports de viscosite entre les deux fluides modifient les caracteristiques du mode le plus instable mais aussi la localisation de cette instabilite dans l’interface. Cette etude de stabilite est de nature a deboucher sur de nouvelles parametrisations pour la modelisation realiste des estuaires. Translated version: Stability of a stratified shear flow, a model of fluid mud To improve the understanding of mud suspension in estuaries, a parametric stability analysis of a two-dimensional shear flow was carried out with a model of two miscible fluid layers of different mass density and dynamic viscosity. The direct numerical simulation code JADIM of IMFT (Institut de Mecanique des Fluides de Toulouse) is used to compute the temporal evolution of these flows. This study is completed by a linear stability study realized with the code LiSa developed at IMFT. A critical Richardson number close to 0.25 is observed. Results show that the characteristics of the most unstable modal wave number and the location of the interface instability, depend on the ratio of two fluid viscosity values. The model is initialized with continuous   vertical profiles for all quantities. Likely outcomes of this stability study are new parameterizations for realistic modelling of estuaries. Keywords: Estuary; Mixing; Stratification; Fluid mud;Sediment transport.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125554753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Le suivi de la turbidité associée au dragage de Vavouto à proximité des sites néocalédoniens classés par l'UNESCO","authors":"Michel Allenbach, M. Mangeas, M. Touraivane","doi":"10.5150/REVUE-PARALIA.2010.007","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2010.007","url":null,"abstract":"La construction d’une usine metallurgique de nickel, de dimension mondiale necessite l’ouverture d’un important chenal de navigation (4500 m de longueur et 7300000 m3 de deblais) dans le lagon nord-ouest neo-caledonien, a proximite immediate de zones coralliennes classees au patrimoine mondial en raison de leur biodiversite exceptionnelle. L’enjeu est essentiel : contribuer au reequilibrage economique inscrit dans les lois, dans le respect d’un environnement fragile et des pratiques societales des populations riveraines. La communication presente le plan de suivi environnemental, integrant un reseau de suivi en temps reel de la turbidite et des parametres physico-chimiques de l’eau et des sediments, ainsi qu’un important volet biologique. Sont ensuite exposes les resultats des controles environnementaux realises et l’interet d’une demarche originale pour assurer leur restitution aux populations autochtones : la creation du CEK (comite environnemental du Koniambo). La derniere partie traite de l’interet de l’utilisation de bases des donnees interoperables : elles facilitent la communication en interne et en externe et rendent plus aisees les methodes de controle a mettre en œuvre. Translated version: Monitoring the turbidity associated with the dredging in Vavouto Bay near New Caledonian sites listed by UNESCO The construction of a world-class nickel foundry necessitates the opening of a large navigation channel (4,500 metres long, producing 7,300,000 cubic metres of dredging spoils) in New Caledonia’s northwestern lagoon in immediate proximity to coral reefs listed on the World Heritage List because of their exceptional biodiversity. The challenge is crucial: contribute to the economic re-balancing required by law while respecting a fragile environment and the societal practices of local populations. This paper presents the environmental monitoring plan, which includes a network to monitor the turbidity and physiochemical parameters of water and sediment in real time, as well as a large biological component. It then presents the results of the environmental tests conducted, and the interest of an original method to ensure the communication of the test results to local populations: the creation of the Koniambo Environmental Committee (CEK, “comite environmental du Koniambo”). The last section addresses the interest to be found in using interoperable databases: they facilitate internal and external communication and simplify the verification methods to implement. Keywords: Dredging; Turbidity; Environmental Monitoring Plan; Reef Ecosystem; Interoperable Database; Sustainable Development; New Caledonia.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130974701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilisation de données altimétriques (Altus) dans la caractérisation de climats hydrodynamiques contrôlant le fonctionnement hydrosédimentaire d'une vasière intertidale : cas de l’estuaire de la Vilaine (Bretagne, France)","authors":"É. Goubert, Emmanuel Frénod, P. Peeters, P. Thuillier, H. J. Vested, N. Bernard","doi":"10.5150/REVUE-PARALIA.2010.006","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2010.006","url":null,"abstract":"Depuis la construction du barrage d’Arzal entre 1965 et 1970, l’estuaire de la Vilaine est soumis a un fort envasement. A partir de donnees bathymetriques, hydrologiques et altimetriques (Altus), il est possible d’identifier des climats hydrodynamiques a differentes echelles spatiales et temporelles et de mieux quantifier les phases d’erosion ou de depot associees. De plus, il a ete possible de montrer l’impact d’un modele en seillons/banquettes ou d’un modele plan sur la dynamique de la vasiere. Translated version: The use of altimetric data (Altus) in the characterization of hydrodynamic climates controlling hydrosedimentary processes of intertidal mudflat: the Vilaine estuary case (Brittany, France) Since the construction of the Arzal dam between 1965 and 1970, the Vilaine estuary is characterized by a strong silting up. Hydrodynamic climates could be identified as responsible for erosion or deposition at different spatio-temporal scales from bathymetrical, hydrological and altimetric (NKE-Altus) data. Each thickness of eroded or deposited sediment could be associated to a typical hydrodynamic climate. Furthermore, it was possible to show the effect of a ridge-runnel bedforms or a smooth surface on the dynamic of the intertidal mudflat. Keywords: Intertidal mudflat; Hydrodynamics; Ridge-runnel bedforms (cross shore).","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134642382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Constitution d’une base de données d’états de mer le long des côtes françaises méditerranéennes par simulations rétrospectives couvrant la période 1979-2008","authors":"David Morellato, M. Benoit","doi":"10.5150/REVUE-PARALIA.2010.005","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2010.005","url":null,"abstract":"Une base de donnees numeriques d’etats de mer en Mediterranee a ete construite a partir de simulations effectuees avec le logiciel TOMAWAC sur la periode 1979-2008 afin de completer la base de donnees ANEMOC couvrant la facade Atlantique-Manche-Mer du Nord des cotes francaises. Les champs de vents utilises en entree sont issus d’une nouvelle analyse meteorologique NCEP2 du U.S. Climate Diagnostics Center de la National Oceanic and Atmospheric Administration (CDC-NOAA). Les resultats du modele sont compares a des mesures de bouees et a des mesures satellitaires altimetriques. L’analyse statistique de ces simulations retrospectives permet d’estimer les conditions moyennes et extremes des vagues sur la Mer Mediterranee. Translated version: Constitution of a numerical wave Data-Base along the French Mediterranean coasts through hindcast simulations over 1979-2008 The purpose of this article is the extension of the wave data-base ANEMOC to cover the Western Mediterranean Sea through numerical hindcast simulations with the third generation spectral wave model TOMAWAC over the 1979-2008 period. Wind-fields used for these simulations come from the U.S. Climate Diagnostics Center of the National Oceanic and Atmospheric Administration (CDC-NOAA) reanalysis (version 2). The model is calibrated with satellite altimeter and wave buoy data. The statistical analysis of these hindcast simulations allows to estimate the average and severe wave conditions over the Mediterranean Sea. Keywords: ANEMOC; Mediterranean Sea; Sea State; Hindcast; Wave atlas; Sea State Atlas; TOMAWAC.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115310668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}