Revue Paralia最新文献

{"title":"Hydrodynamique du golfe de Gabès déduite à partir des observations de courants et de niveaux","authors":"Mohamed Jamel Hattour, C. Sammari, Sassi Ben Nassrallah","doi":"10.5150/REVUE-PARALIA.2010.003","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2010.003","url":null,"abstract":"L’objectif de cette etude est de verifier et d’expliquer la dynamique dans le littoral du golfe de Gabes (cote Est de Tunisie) par des observations in situ. Nous avons effectue differentes mesures de hauteur d’eau et de courant en quelques points significatifs de cette region qui, avec l’Adriatique (dans une moindre mesure), beneficient de la plus grande amplitude de maree en mer Mediterranee. Cette etude presente les premiers resultats des analyses des series temporelles. Les instruments utilises sont des ADCP (Acoustic Doppler Current Profiler) pour le courant et des maregraphes submersibles immerges pour la hauteur d’eau. La longueur moyenne de nos series temporelles est 40 jours et sont reparties de 2007 a 2008. Les resultats preliminaires sont concluants : bien que les composantes harmoniques aient ete conformes a celles deja etablies par differents auteurs, les valeurs absolues des hauteurs d’eau ainsi que les phases presentent des ecarts significatifs au moins dans deux zones. En outre, les hauteurs ont montre l’existence d’une boucle du courant general de la Mediterranee qui penetre dans le golfe de Gabes. Translated version: Hydrodynamics of the gulf of Gabes deducted from the observations of currents and water levels The objective of this study is to verify and to explain the dynamics along the coast of the gulf of Gabes (East Coast of Tunisia) by in situ observations. We made various measurements of height of water and current in some significant points of this region which, with the Adriatic (in a lesser measure), benefit from the biggest amplitude of tide in the Mediterranean Sea. This study presents the first results of the analysis of the temporal series. The instruments used are ADCP (Acoustic Doppler Current Profiler) for the current and submersible tide loggers immersed for the height of water. The average lengths of our temporal series are 40 days and are distributed from 2007 till 2008.The preliminary results are decisive: although the harmonic components were in accordance with those already established by various authors, the absolute values of the heights of water as well as the phases presenting significant gas at least in two zones. Besides, the heights showed the existence of a loop of the current of the Mediterranean Sea which penetrates into the gulf of Gabes. Keywords: Coastal engineering; Tide; Currents; Maritime hydraulics; Harmonic components; General circulation; Gulf of Gabes; Tunisia.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126144209","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":"DRELIO : Un drone hélicoptère pour le suivi des zones littorales","authors":"M. Jaud, C. Delacourt, P. Allemand, P. Grandjean, Jérôme Ammann, Romain Cancouët, A. Deschamps, E. Varrel, V. Cuq, Serge Suanez","doi":"10.5150/JNGCGC.2010.057-J","DOIUrl":"https://doi.org/10.5150/JNGCGC.2010.057-J","url":null,"abstract":"La connaissance du littoral, sa protection, son amenagement necessitent un suivi des changements qui s'y produisent. Toutefois, en France, devant l'etendue des facades maritimes a couvrir, les techniques de mesures in situ ne peuvent etre appliquees de facon systematique. Dans ce cas, les techniques de teledetection spatiale ou aerienne sont des approches complementaires. A partir de ces plates-formes, des images stereoscopiques multi-temporelles sont, apres une serie de traitements photogrammetriques appropries, directement exploitables sous formes d'orthophotographies et de Modeles Numeriques de Terrain (MNT). Ce type de produits permet notamment la quantification des changements morphosedimentaires a l'interface Terre-Mer (transport transversal et longitudinal de sediments, erosion,...). Actuellement, la resolution spatiale des MNT generes a partir d'images aeriennes ou satellitaires (<50 cm) est insuffisante pour la plupart des applications sur la frange littorale. En outre, dans le cas d'interventions consecutives a un evenement extreme (tempete, raz de maree, pollution...), ces systemes manquent de souplesse (trajectoires predefinies, contraintes d'altitude, de vitesse, cout de mise en oeuvre...) L'utilisation de drones constitue donc une alternative interessante pour des suivis de precision ou des interventions rapides.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124897743","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":"Dynamique d'un périmètre littoral portuaire : la côte de San-Pédro, Sud-Ouest de la Côte d’Ivoire","authors":"K. Yao, J. Abe, S. B. Bamba, K. E. Konan, K. Aka","doi":"10.5150/REVUE-PARALIA.2010.002","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2010.002","url":null,"abstract":"La dynamique du perimetre littoral portuaire de San-Pedro a ete etudiee a partir de 11 profils transversaux implantes en arriere plage au droit de 5 sites, entre la plage Tombolo a l’Ouest et la plage du Club Nautique a l’Est. Il en ressort une evolution variable des segments de cote, en relation surtout avec les installations portuaires et la variation des conditions hydrodynamiques. Les changements morphologiques etant l’expression de l’evolution dynamique obeissent a un rythme saisonnier qui se caracterise par une alternance de periodes d’erosion entre les mois de mai et aout et d’engraissement entre novembre et fevrier. Par ailleurs, les analyses granulometriques montrent une variation spatiale du grain moyen, du Club Nautique a la plage Tombolo au cours de la periode 1985-1986 corollaire de la dynamique variable des differents secteurs de plage. Translated version: Dynamics of a harbour littoral perimeter: the San-Pedro coast, South-west of Cote d'Ivoire The dynamics of San-Pedro harbour’s perimeter was studied using 11 transverse profiles established behind the beach on 5 sites located between the Tombolo beach in the West and the Nautical Club beach in the East. Variable evolution of the coastal portion is observed, mainly related to the harbour structures and the variation of the hydrodynamic conditions. The morphological changes being the expression of the dynamic evolution obey to a seasonal rhythm which is characterized by an alternation of erosion periods from Mai to August and accretion between November and February. In addition, grain size analyses show a space variation of the average size, from Nautical Club to the Tombolo beach during the period spreading from 1985 to 1986, attesting the variable dynamics of the different beach portions. Keywords: Harbour structures; Morphology and sedimentary dynamics; Erosion; Accretion; Cote d’Ivoire; San-Pedro.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116115311","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":"Apport de la sismique marine très haute résolution à l’étude de la rade abri de Brest (France)","authors":"A. Baltzer, R. Boutin, Alexis Stépanian","doi":"10.5150/REVUE-PARALIA.2010.001","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2010.001","url":null,"abstract":"Dans le cadre de la modernisation du port militaire de Brest, deux reconnaissances geophysiques realisees avec le boomer Seistec (en 2004 et en 2006) ont permis de reconnaitre la couverture sedimentaire et la profondeur du socle. De precedentes investigations avaient etabli l’existence de decalages verticaux des couches geologiques grâce a des sondages. La vision \"en continu\" fournie par les profils sismiques THR permet d’apprehender de facon differente ces decalages, et de les associer a des structures ondulees remarquables, relatives a une phase de remplissage de la Baie. Cette vision globale des fonds permet de comprendre l’evolution geomorphologique de la rade dans son ensemble et de depasser la vision \"ponctuelle\". Ainsi, l’influence de l’Aulne, et non de la Penfeld comme le laissait supposer la disposition actuelle, s’avere preponderante. Translated version: The study of the military Harbour of Brest (France): contribution from a Very High Resolution seismic tool Within the framework of the modernisation of the military harbour of Brest, two seismic surveys have been conducted with the Seistec boomer (in 2004 and 2006) to recognize the sedimentary cover and depth of the rock basement. Previous investigations, based on drill holes, have shown the occurrence of vertical offset between geological strata. The \"continuous\" view acquired with the VHR seismic profiles allows a new approach of these vertical offsets and thus a new interpretation: they could be special undulating structures relative to the phase of sedimentary infilling of the bay. Such a global vision of the sea bottom floor allows to better understand the geomorphologic evolution of the harbour and to go beyond the \"punctual\" view. Whereas the Penfeld River seemed to be the actual active river, the influence of the Aulne River appears to have been preponderant in the sedimentary dynamics of the bay. Keywords: Brest harbor; Boomer seismic; Sediments; Faults; \"Continuous versus punctual view\".","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126695736","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":"Technical management of French harbour structures Part 1: Description of built assets","authors":"J. Boéro, F. Schoefs, B. Capra, Nicolas Rouxel","doi":"10.5150/REVUE-PARALIA.2009.006","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2009.006","url":null,"abstract":"This paper focuses on the study of the built assets of French harbour owners with a view to providing elements which can be used in risk analysis. The structures’ functions and position in the system are identified and their relative strategic importance for economic, touristic developments and national defence is highlighted. The results are presented by focusing the analysis on observed levels of heterogeneity, especially the description of the construction techniques, the materials used and the ages of the built assets. Version traduite : Gestion technique des ouvrages portuaires en France. Partie 1: Description du patrimoine Cet article traite de l’etude du patrimoine portuaire francais avec comme objectif de fournir des elements qui puissent etre utilises en analyse de risques. La fonction et la position des ouvrages dans le systeme « port » sont identifiees et leur importance strategique relative pour l’economie, le tourisme et la defense nationale est soulignee. Les resultats sont presentes en concentrant l’analyse sur les niveaux d’heterogeneites observes, specialement en ce qui concerne la description des techniques constructives, des materiaux utilises et de l’âge des ouvrages qui composent le patrimoine. Mots cles : Patrimoine; Ouvrages portuaires; Retour d’experience; Gestionnaires; Enquete.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126234969","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":"Technical management of French harbour structures Part 2: Current practices, needs - Experience feedback of owners","authors":"J. Boéro, F. Schoefs, B. Capra, Nicolas Rouxel","doi":"10.5150/REVUE-PARALIA.2009.007","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2009.007","url":null,"abstract":"The French harbour system has an essential role: on the one hand for French business, tourism and industry; and on the other hand for European defence. Consequently, maintenance of harbour assets is a stake of major importance. This paper focuses on the analysis of actual maintenance practices, associated constraints, but also capacities to fulfil maintenance programs of the built assets of French harbour owners. The needs in risk management and control are also highlighted. The results are presented by focusing the analysis on observed levels of heterogeneity.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132176540","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":"Etude de l'évolution des formes chimiques des métaux dans des sédiments marins dragués stockés à terre","authors":"F. Séby, Christelle Benoit-Bonnemason, Emmanuel Tessier, C. Alzieu, Jean-Luc Aqua, L. Sannier, O. Donard","doi":"10.5150/REVUE-PARALIA.2009.S03","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2009.S03","url":null,"abstract":"Le stockage a terre des sediments est un traitement qui a ete envisage dans le cadre du projet SEDI.MAR.D. 83 dans le but de diminuer la charge polluante des sediments marins dragues. Ce traitement serait susceptible d’entrainer, par vieillissement naturel, des transformations physico-chimiques et/ou biologiques au sein de la matrice sedimentaire qui pourraient modifier sa toxicite. Ce travail a porte sur le devenir des metaux et de leurs formes chimiques lors du vieillissement des sediments. Ce traitement permet d’abaisser la moitie de la concentration initiale du tributyletain (TBT) apres deux mois d’entreposage. Cette degradation du TBT au cours du temps de stockage a terre s’accompagne de la formation d’especes de l’etain qui sont moins dangereuses. Pour l’arsenic, seules les formes inorganiques As(III) et As(V) ont ete detectees. As(III) est la forme majoritaire dans le sediment fraichement drague et s’oxyde en As(V) en fonction de la duree du traitement. Cette oxydation a egalement ete observee pour le chrome, avec apparition de tres faibles quantites de chrome hexavalent. En raison de sa grande toxicite, la formation du Cr(VI) est une limite au traitement etudie. Il semble donc preferable de considerer un temps de stockage a terre assez court de facon a degrader le TBT tout en minimisant la formation de Cr(VI). Dans la mesure ou aucun traitement vraiment efficace n’existe pour gerer les sediments marins contamines, cette etude montre que le stockage a terre peut etre considere comme une premiere approche peu couteuse. Si le degre de pollution est suffisamment abaisse par ce procede, il est ensuite possible d’envisager une valorisation de ces materiaux dans le domaine des travaux publics par exemple (remblais). Translated version: Evolution of metals and their chemical forms in land-disposed dredged marine sediments Land disposal is a treatment which has been considered in the framework of the SEDI.MAR.D. 83 project in order to decrease chemical contamination of dredged marine sediments. Natural aging could involve physico-chemical and/or biological transformations in the sediments resulting in a modification of its toxicity. This study was carried out to better understand the fate of metals and their chemical forms during this treatment. A degradation rate of 50% was observed after two months of land disposal for tributyltin (TBT) which is one of the most dangerous organotin compounds. This degradation is accompanied with the formation of less dangerous species such as dibutyltin and monobutyltin. For arsenic, only inorganic forms were identified (As(III) and As(V)) with a change in their distribution as a function of the time of land disposal. A decrease of As(III) in favour of As(V) with time was shown. This oxidation was also observed for chromium with the formation of small amounts of hexavalent chromium. Because of its high toxicity, the formation of Cr(VI) can limit the duration of land disposal. It seems therefore preferable to cons","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123265178","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":"Approche économique et validation de méthodes de traitements aux liants hydrauliques de sédiments marins contaminés","authors":"L. Sannier, D. Levacher, M. Jourdan","doi":"10.5150/REVUE-PARALIA.2009.S02","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2009.S02","url":null,"abstract":"Pour une meilleure gestion a terre des sediments contamines, consideres comme dechets, une unite pilote de traitements a ete mise en œuvre sur un site experimental, proche de Toulon. Un large eventail de sediments portuaires representatif de la variabilite de ces dechets a ete achemine sur cette plate-forme pour y etre traite et valorise et ce, de maniere operationnelle dans le cadre du projet SEDI.MAR.D. 83. Un des objectifs du projet a concerne la valorisation des sediments a l'aide de liants hydrauliques. Pour ce faire, des essais de faisabilite de stabilisation/solidification sur des sediments pre traites ou directement traites, ont ete entrepris tant du point de vue mecanique qu’environnemental. L’analyse des nombreux resultats d’essais realises sur differents sediments portuaires a permis d’etudier la faisabilite technique de ce type de procede de traitement par liants, d’optimiser les dosages et les additifs a mettre en œuvre et de confirmer l'acceptabilite environnementale par rapport aux filieres de valorisation envisageables pour ces dechets comme materiaux routiers et de remblais – ouvrages en terre, talus paysagers, remblaiement de carriere, remplissage de cavites souterraines-. Les possibilites d’emploi d’un tel procede de traitement par liants hydrauliques sont discutees dans cet article et notamment la discrimination economique des traitements effectues en amont qui permettent d’ameliorer la qualite du sediment pre traite avant stabilisation/solidification par liant. Cet article fait partie d'un ensemble de contributions relatives au projet SEDI.MAR.D. 83, (AQUA et al.., 2009 ; BENOIT-BONNEMASON et al., 2009 ;  LEVACHER et al., 2009 ; SEBY et al., 2009). Translated version: Economical approach and validation of treatment methods using binders of contaminated marine sediments For a better environmental practice in the land management of contaminated sediments considered as waste material, a pilot plant with sediments processing units was installed on a port site near the city of Toulon in the south of France. A large panel of sediments, representative of their variability, has been gathered on this pilot area to be treated and reused. All these processing operations constitute the basis of the SEDI.MAR.D. 83 programme. As part of this programme, one of the objectives concerns the valorisation of marine sediments with hydraulic binders. To succeed in doing that, feasibility tests of stabilization/solidification with raw or pre-treated sediments have been performed. Mechanical and environmental aspects were considered together with the different applied treatments. A lot of tests were run on various port sediments. The obtained results which follow were analyzed and have lead to studying the technical feasibility and ability of the process using hydraulic binders. On one hand, the optimization of the percentages of each binder and additives, if used, was searched for the different mixtures. On the other hand, the environmental accepta","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122816302","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":"Comparaison de méthodes de cartographie des végétations sous-marines côtières","authors":"C. Noel, C. Viala, M. Coquet, Simon Marchetti, Éric Bauer, É. Emery, D. Sauzade, R. Kantin, S. Coudray, Gilles Trut","doi":"10.5150/REVUE-PARALIA.2009.005","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2009.005","url":null,"abstract":"Cet article presente les resultats de la comparaison de la methode DIVA (Detection & Inspection Verticale Acoustique), developpee par SEMANTIC TS, avec les methodes optiques (systemes video remorques MOBIDIC et MOOGLI) et acoustiques (systeme sonar lateral) mises en œuvre par l’IFREMER dans trois sites distincts : (i) le site atelier des Embiez a l’Ouest de Toulon, (ii) le site atelier de Saint Raphael (donnees obtenues dans le cadre du programme INTERREG IIIB / POSIDONIA, site web) et (iii) le bassin d’Arcachon pour la cartographie de l’herbier de zosteres. La methode DIVA est particulierement performante lorsqu’elle intervient en complement des methodes surfaciques habituellement mises en œuvre par l’IFREMER. Translated version: Comparison of coastal marine vegetation mapping methods This article presents the results of comparisons of DIVA method (French acronym for Vertical Acoustic Detection and Inspection) developed by SEMANTIC TS with optical (towed video systems MOBIDIC and MOOGLI) and acoustic (side scan sonar) methods deployed by IFREMER in three different areas: (i) Les Embiez (Western Toulon), (ii) Saint Raphael (data collected during the INTERREG IIIB / POSIDONIA program, web site) and (iii) Le Bassin d’Arcachon for Zostera meadows cartography. The DIVA method is particularly efficient when it completes the usual methods performed by IFREMER. Keywords: Sub marine vegetation cartography; Sub marine acoustic; Sea floor classification; Side scan sonar; Echo sounder; Posidonia; Zostera.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127852206","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 des sédiments et morphologie de l'embouchure du fleuve Comoé (Grand-Bassam, Côte d'Ivoire)","authors":"K. L. Adopo, K. Kouassi, Ama Valérie Irma Wognin, S. Monde, K. Aka","doi":"10.5150/REVUE-PARALIA.2008.002","DOIUrl":"https://doi.org/10.5150/REVUE-PARALIA.2008.002","url":null,"abstract":"Les analyses granulometriques et les leves bathymetriques effectues a l’embouchure du fleuve Comoe, entre 2005 et 2007, ont permis de caracteriser les sediments et la morphologie du fond de cette embouchure, sujette a d’importantes modifications. Sur la plage, les sediments sont constitues de sables majoritairement grossiers a moyens alors que dans l’estuaire on rencontre essentiellement des vases et des sables vaseux. Par ailleurs, on enregistre une plus grande variete de mineraux sur la plage que dans l’estuaire. Les epaisseurs annuelles de depots au niveau de l’estuaire sont faibles devant les depots marins. C ette etude a permis de realiser les premieres cartes bathymetriques de l’estuaire du fleuve Comoe. Translated version: Characterization of the sediments and morphology of the Comoe river mouth (Grand-Bassam, Cote d’Ivoire) The grain size analysis and the bathymetric surveys carried out between 2005 and 2007, made it possible to characterize the sediments and the morphology of the bottom of the mouth of the River Comoe prone to important morphodynamic modifications. On the beach, the sediments consist mainly in coarse and middle sands whereas in the estuary muddy fine sediments are predominant. The variety of minerals on the beach is more important than what is observed in the estuary. The annual deposits within the estuary are lower than marine deposits in the near beach region. This study made it possible to carry out the first bathymetric charts of the estuary of the River Comoe. Keywords: River mouth; Estuary; Sediment; Bathymetry; Comoe; Cote d’Ivoire.","PeriodicalId":202784,"journal":{"name":"Revue Paralia","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115736653","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}