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Статті в журналах з теми "Bassins côtiers"
Carbonnel, Gilles. "The ostracod's ecozones on the African coastal basins (Togo, Guinea-Bissau, Senegal, Mauritania) revealed there by biogeography." Newsletters on Stratigraphy 20, no. 2 (December 20, 1988): 59–72. http://dx.doi.org/10.1127/nos/20/1988/59.
Повний текст джерелаDugué, Patrick, Edmond N. Kohio, and Justin Tiemtoré. "L’agriculture burkinabè face à la crise de la Covid-19 : cas des régions du Yatenga et des Hauts-Bassins." Cahiers Agricultures 30 (2021): 16. http://dx.doi.org/10.1051/cagri/2021002.
Повний текст джерелаGuillaud, Jean-François, and Luc Bouriel. "Relation concentration-débit et évolution temporelle du nitrate dans 25 rivières de la région Bretagne (France)." Revue des sciences de l'eau 20, no. 2 (May 16, 2007): 213–26. http://dx.doi.org/10.7202/015814ar.
Повний текст джерелаBoudjadja, A., M. Messahel, and H. Pauc. "Ressources hydriques en Algérie du Nord." Revue des sciences de l'eau 16, no. 3 (April 12, 2005): 285–304. http://dx.doi.org/10.7202/705508ar.
Повний текст джерелаFeïss, Corinne, Philippe Bonté, Anna Andrieu, and Irène Lefevre. "Transfert de matières des bassins versants côtiers au milieu marin : identification, caractérisation et vitesse. L'exemple de la baie du Marin (Martinique) / Transfer of matters from the watersheds toward the coast: identification, characterisation and estimation of the silting up speed. The exemple of La baie du Marin (Martinique)." Géomorphologie : relief, processus, environnement 10, no. 1 (2004): 81–90. http://dx.doi.org/10.3406/morfo.2004.1201.
Повний текст джерелаHallouz, Faiza, Mohamed Meddi, and Gil Mahe. "Modification du régime hydroclimatique dans le bassin de l’Oued Mina (nord-ouest d’Algérie)." Revue des sciences de l’eau 26, no. 1 (March 18, 2013): 33–38. http://dx.doi.org/10.7202/1014917ar.
Повний текст джерелаBougeard, M., J. C. Le Saux, G. Gnouma, and M. Pommepuy. "Modélisation des flux de contamination fécale sur un bassin versant côtier." Techniques Sciences Méthodes, no. 5 (2010): 69–78. http://dx.doi.org/10.1051/tsm/201005069.
Повний текст джерелаDelcaillau, Bernard, Jean-Claude Ozouf, David Masiée, Edgard Laville, and Jean-Pierre Coutard. "Évolution géomorphologique d'un bassin versant côtier: l'exemple de la Touques (Basse-Normandie)." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 326, no. 9 (May 1998): 609–15. http://dx.doi.org/10.1016/s1251-8050(98)80251-6.
Повний текст джерелаSaffache, Pascal. "Érosion des bassins-versants et engraissement côtier : le cas de la baie du Galion (Martinique)." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 330, no. 6 (March 2000): 423–28. http://dx.doi.org/10.1016/s1251-8050(00)00154-3.
Повний текст джерелаSaulnier-Talbot, Émilie, and Reinard Pienitz. "Isolation au postglaciaire d'un bassin côtier près de Kuujjuaraapik-Whapmagoostui, en Hudsonie (Québec) : une analyse biostratigraphique diatomifère." Géographie physique et Quaternaire 55, no. 1 (October 2, 2002): 63–74. http://dx.doi.org/10.7202/005662ar.
Повний текст джерелаДисертації з теми "Bassins côtiers"
Lepage, Hugo. "Traçage de la dispersion des sédiments contaminés dans les bassins versants côtiers de Fukushima." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112183/document.
Повний текст джерелаLarge quantities of radionuclides were released into the atmosphere by the Fukushima Dai-Ichi Nuclear Power Plant (FDNPP) after the earthquake-triggered tsunami devastated the eastern coast of Japan on March 11, 2011. Many of these radionuclides (20%) were deposited on soils of the Fukushima Prefecture. This PhD thesis develops original fingerprinting methods to track the dispersion of contaminated particles following this accident. The study focuses on 3 coastal catchments north of the FDNPP (Mano — 175km², Niida — 270km² and Ota — 75km²) draining heavily contaminated areas of the radioactive plume. The Fukushima Prefecture is characterized by an erosive climate, with the occurrence of spring floods and summer typhoons. To study the dispersion of the radioactive contamination, soil samples and sediment drape deposits were collected during 6 sampling campaigns (every six months between November 2011 and May 2014; i.e., after the major flood events). Each sample was analyzed by gamma spectrometry to determine radionuclide activities, and several soil and sediment samples were also analyzed by neutron activation analysis to determine their geochemistry. First, the analysis of 137Cs activity in 10 soil cores collected in paddy fields confirmed the limited migration of radiocesium with depth in the soils of the coastal catchments. More than 90% of the contamination was still concentrated in the uppermost 2cm of the soils by November 2013. Particles contaminated were therefore available for mobilization and transport downstream by processes that govern soil erosion. Second, metastable silver-110 (110mAg) was detected in most of the samples collected between November 2011 and November 2012, and our investigation showed that this radionuclide has a similar behavior as 137Cs in soil and sediment. Consequently, we used 110mAg to track the dispersion of the contamination as the 110mAg/137Cs activity ratio in soils of the Niida catchment showed significant differences between upstream and downstream locations. The use of a binary mixing model allowed the identification of a seasonal cycle of erosion and dispersion of particles. However, as 110mAg has a short half-life (250 days), it rapidly decayed and could not be detected anymore by May 2013. To overcome its disappearance, the contribution of soils located on the mountainous plateaus to the sediment transiting the river in the coastal plains was quantified based on their 137Cs signature. Binary mixing models were used, based on the distributions of 137Cs in mountainous areas (> 20 kBq/m²) and in coastal plains (< 20 kBq/m²). The results demonstrated that the contribution of the mountainous area varied in the different catchments. In the Niida catchment where no dam has been built, the mountainous area supplies more sediment to the river (≈46%) than in the Mano catchment that has a dam (≈20%). These results show the impact of dams generating a sediment disconnectivity. Finally, the soil map of the region was used in order to identify the soil types that may supply sediment to the rivers. The main soil types (Andosols, Cambisols and Fluvisols) were characterized by their geochemical composition, and Sc and Yb were identified as the most discriminant elements. The distributions of these elements in the three sources were used in a mixing model. Results show that Fluvisols are the main source supplying >70% of sediment to the rivers in both catchments. This soil type is mainly found in paddy fields, which confirms the enhanced erodibility of these cultivated areas. In the future, the dataset compiled could be used to improve soil erosion model operating at the catchment scale. Moreover, the impact of the ongoing decontamination works on the dispersion of contaminated sediments should be investigated
Payet, Évelyne. "Étude des dynamiques de dégradation des sols, à l'échelle des bassins versants côtiers de l’océan Indien." Thesis, La Réunion, 2015. http://www.theses.fr/2015LARE0031/document.
Повний текст джерелаSince the 20th centuries, the Southwest of Indian Ocean is particularly affected by anthropogenic degradations. This study aims to analyze degradations on drainage basin scale, which allows a suitable monitoring of critical areas, in the southwest of Indian Ocean. It focus on the assessment of land degradation and its causes, land cover change and erosion.The main difficulty stands in the implementation of reproducible methods and proceeds for developed and developing countries. In light of this, remote sensing data are relevant. Those data enable a regular observation of phenomena, allowing a full description of isolated lands and at different scale. This study combined, remote sensing data processing, spatial analysis and modeling to analyze degradations. Approaches include, data collection, their formatting or their preprocessing. Land cover information provided from Object-Based Image Analysis (OBIA) methodologies and Geographical Information System (GIS) authorized data conditioning and modeling. On the Fiherenana catchment, soil loss has been computed taking into account land cover changes. Those information were provided from SPOT 4 and 5 images from 2001 to 2013. Results confirmed the forest degradation especially in Ranobé, where we recorded a loss of more than 230 km² over 12 years. Lands affected by erosion process, spatialized and quantified by RUSLE model, also increased over this period. On La Rivière des Pluies, IGN’s orthophotographies, from 1997 until 2012, permitted urbans imprint analyzing. On Grand Éboulis site, vegetation monitoring revealed slumps. The study exposed spatial and quantitative results highlighting degradations dynamics on catchm
Chu, Yin. "Flux de polluants en crue sur des petits bassins versants côtiers méditerranéens : sources, estimation et modélisation." Montpellier 2, 2006. http://www.theses.fr/2006MON20015.
Повний текст джерелаRobinet, Tony. "Mécanismes de persistance des assemblages piscicoles en eau douce : des bassins côtiers continentaux aux îles océaniques." La Rochelle, 2004. http://www.theses.fr/2004LAROS117.
Повний текст джерелаA fish assemblage is constituted by fish species living in a given system at a given time. The composition of the freshwater fish assemblage in a catchment depends of many multiscale factors. Insular freshwater systems, as continental coastal catchments or oceanic islands, are of interest to understand the persistence conditions of the fish species occurring there. At different degrees of insularity, this study analyses mechanisms of persistence of fish species in freshwaters according to their reproductive and migratory strategies. From the coastal catchments of the North-West of France to the Reunion Island in the Indian Ocean, we study the species assemblages, different at the taxonomic level, but comparable at the life-history traits level (movements ability, migration, reproduction). The persistence mechanisms of the fish assemblage are considered on the first hand at the river's scale, with multi-years surveys, in a small coastal and continental river (the Fremur) and in the 13 rivers of the Reunion Island. Then, the study of the density variations and extinction probability of species at the river's scale allows us to discuss on the specific composition of the fish assemblage at a regional scale in coastal continental rivers and oceanic islands. Among the various strategies developed to persist in different conditions of insularity, migratory or sedentary species, freshwater- or sea-spawning, anadromous, catdromous or amphidromous, the dispersal strategy of eels is present in all the catchments we studied. Thus, the estuarine and riverine recruitment of eels in the Reunion Island is presented with the results of a one-year survey, and the regional conditions of persistence of this particular strategy are discussed
Debals, Benoît. "Etude sédimentologique des formations quaternaires des bassins des fleuves côtiers du Roussillon (France) : vallée de la Têt et du Tech." Perpignan, 1998. http://www.theses.fr/1998PERP0306.
Повний текст джерелаThe two coastal rivers from the french department of pyrenees qrientales, the tet and the tech, deposited five staged terraces or semi-fill and fill terraces during the quaternary. These are alluvial terraces having a climatic origin with neotectonics readjustments in the roussillon coastal plain. The deposits of these two rivers are similary and are mainly constitued of quartz, schists, granites and gneiss pebbles with proportions that vary depending on the level's age. These coarse elements are stuck in a mainly bad sorted coarse sands matrix. Otherwise in the high levels, a silty-clay loam is the principal gangue. For both water courses it's multi-peaked floods deposits resulting of irregular and violent hydrodinamic conditions. The mineralogic assemblage of the two valleys is similar and is composed of an association of epidote-gamet-andalusite-zoisite-hornblende. The study of the variations of this assemblage in the tet levels shows that the middle terraces are the only level demultiplicated by neotectonics. The argillaceous minerals composing these formations are at the same time inherited and cristallized after settling and early diagenesis. Illite and kaolinite are present in a great proportion in all levels. Chlorite exists only in recent levels and smectite in the older ones. We deduced that the first is inherited when the second is cristallized after settling and early diagenesis from mica and illite which is less representated in the upper levels. The micromorphological study perfectly shows the alteration process augmentation from the lower to the higher terraces by describing the sediment evolution. A paleomagnetic study made on the three highest terraces levels gave no interresting results that would permit to precise the regional stages chronostratigraphy
Fiandino, Mirabelle. "Apports de matières en suspension par les fleuves côtiers à l'étang de Berre (Bouches-du-Rhône, France) : Quantification des flux, identification des zones sources, étude des relations avec les conditions hydrologiques." Aix-Marseille 1, 2003. http://www.theses.fr/2003AIX10035.
Повний текст джерелаPaugam, Caroline. "Niveau d'eau à la côte en bassin semi-ouvert ˸ : effets combinés du vent, des vagues et de la bathymétrie." Electronic Thesis or Diss., Toulon, 2021. http://www.theses.fr/2021TOUL0003.
Повний текст джерелаThis doctoral research focuses on water level variations in semi-open coastal basins and the impact of wind, waves and bathymetry. The two phenomena causing water level variations studied are wind-tides and seiching. Three coastal basins were selected on the French coast of the Provence-Alpes-Côte d’Azur region˸ the Vaccarès lagoon, the Berre lagoon and the Toulon Bay. The choice of these sites is due to the fact that they are exposed to equivalent wind regimes, their depths, morphologies and openings to the seaare different, allowing a comparative analysis. This work is based on the use of in-situ water level data from the HTM-NET network and two experimental campaigns. It was shown that the higher the wind speed, the steeper the slope of the free surface. Wind-tide is all the more important as the depth of the basin is low. In addition, the greater the opening to the sea, the lower the wind-tide. The determination of a constant drag coefficient allowed a satisfactory prediction of moderate wind-tides. It was also observed that in basins of finite depth and limited fetch conditions, the wave conditions are responsible for a higher wind friction on the water surface. The analysis of the currents showed that the presence of wind-tides has an impact on the currentology in the three sites. The periods of the seiches in the three sites were determined and the axes of resonance could be partly identified. The seiche amplitudes are of the order of mm in the Vaccarès lagoon and cm in the Berre lagoon and the Toulon Bay. The high friction in theshallow water site is responsible for an attenuation of the seiche amplitudes. The presence of seiche was correlated with wind-tides in the Berre and Vaccarès lagoons, which have a moderate opening to the sea. On the other hand, in the Toulon Bay, which has a large opening to the sea, other forcings are likely to excite the natural modes
Johnson, Ampah Kodjo. "Le bassin côtier à phosphates du Togo : Maastrichtien - Eocène moyen." Dijon, 1987. http://www.theses.fr/1987DIJOS010.
Повний текст джерелаBadreddine, Ali. "Écosystèmes côtiers du littoral libanais : état écologique, conservation, évolution." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4031/document.
Повний текст джерелаThe aim of this study was to provide further knowledge of the effects of anthropogenic disturbance on the conservation status of important shallow habitats (vermetid reefs, Cystoseira forests) in a relatively poorly known region of the Mediterranean Sea: the Lebanese coast. Multiple approaches were applied for the first time along the Levantine Sea, such as the CARLIT (CARtography of rocky-shore LITtoral communities) index, a tool conceived to quantify the Ecological Status (ES) in the framework of the Water Directive (WFD 2000/60/EU). A general description of the Lebanese coastline, summarizing the major environmental features and anthropogenic activities influencing benthic communities, highlighted that Lebanon has been (and is at present) subject to multiple stressors. The application of the CARLIT, based on macroalgal, gives important insights on the ES of Lebanese ecosystems in relation to human impacts and provides a detailed cartography on the distribution and abundance of shallow communities, and in particular Cystoseira and Sargassum forests. The survey of some Lebanese vermetid reefs allowed the evaluation of their current status according to different human pressures and highlighted that they are highly affected by human pressures and only few of them are still alive. In a view of the upcoming oil and gas discovery offshore Lebanon, Lebanese marine ecosystems are under multiple and massive threats; the data provided in the research performed provide a baseline of the distribution and conservation status of key habitats along Lebanese coasts, in order to follow their evolution and to have a management tool in case of catastrophic oil spills
Jamet, Guillaume. "Réponses sédimentaires d’un bassin versant côtier aux variations glacio-eustatiques et au soulèvement plio-quaternaire : l’exemple du bassin versant côtier de la baie de Seine (Seine, Touques et Dives)." Caen, 2014. http://www.theses.fr/2014CAEN2029.
Повний текст джерелаThis geomorphologic and sedimentary study aims at investigating the fluvial systems of the Seine river and its paleo-tributaries that are the Touques, the Dives and the Orne Rivers. These rivers all belong to the same catchment area, so-called Bay of Seine catchment (BSC). The BSC area of those systems is bordered by the English Channel to the North, and by hilly land region (i. E. Zone bocaine and Perche) to the South with exception to the Seine river which extends further in a South Eastern direction. From the end of the Early Pleistocene, the geological background of the catchment area (i. E. Armorican massif & Parisian basin) was incised and eroded by the fluvial systems. These sedimentary and geomorphological processes are now recorded in fluvial terraces. In the BSC area, the paleo-Seine followed a different evolution from the other coastal rivers. Due to the different geomorphologic and sedimentary Quaternary records, a plury-disciplinary approach complemented by ESR datations was carried out for assessing the role of structural , climatic and glacio-eustatic forcings on the evolution of the BSC area. Geological structures partially control the drainage network. Since the Neogene, a slow and continuous uplift gave the BSC its North South orientation, and therefore allowed the inception of a sedimentary transit towards the English Channel. Upstream, the Perche bulge induced a radial drainage (i. E. Risle, Touque, Dive and Orne) around its dome-shaped structure. Whereas downstream, the North Eastern-oriented monoclinal structure of the Mesozoic units of the Parisian basin force the drainage on an Eastern direction. In addition to structural control, the climate is another primary forcing that shapes the BSC from the Middle Pleistocene onward. This control participates in the evolution of the river dynamics and valley forms at different temporal scales from glacial/interglacial cycles (~100 ka) to rapid climate changes (~1 ka). New observations led on terrace deposits shows that there is not a single type of periglacial river (i. E. Gravel-bed braided river). These differences were explained by sub-basin properties: lithology, sediment supply or inherited structures. The Quaternary glacio-eustatic forcing only plays a role in the downstream part of fluvial systems. In the lower Seine valley, sedimentary records investigated in the stepped terraces allowed the identification of several sea-level highstands since the Middle Pleistocene. Cyclic base-level changes, recorded in the succession of fluvial periglacial gravels overlain by silt to sandy tidal deposits, are linked to major cold-to-temperate climate transitions. Despite these sedimentary records, the whole BSC only preserved paleo-geometries of quaternary estuaries by a widening of the downstream part of fluvial systems (Dives, Touques, and Seine river)
Частини книг з теми "Bassins côtiers"
"Chapitre 10 - Entre société, érosion et climat, les crises des basses plaines côtières en Provence, fin XVIe-XVIIIe siècles." In Indisciplines, 157–74. Éditions Quæ, 2006. http://dx.doi.org/10.3917/quae.beck.2006.01.0157.
Повний текст джерелаТези доповідей конференцій з теми "Bassins côtiers"
EL MOUTCHOU, Brahim, Naima AOURYAGHAL, and Abdelkader BENJBARA. "Problématique de l’envasement des retenues d’eau des barrages des bassins côtiers nord marocains : cas des barrages Nakhla, Smir, Ibn Batouta et M.B.A. El Khattabi (Maroc)." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2014. http://dx.doi.org/10.5150/jngcgc.2014.034.
Повний текст джерелаGILLE, Julian, Stéphan GAILLARD, Benoist HITIER, Marc ROBIN, Hélène OGER-JEANNERET, and Pascal LECOMTE. "Modélisation des apports des bassins versants en baie de Bourgneuf." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2010. http://dx.doi.org/10.5150/jngcgc.2010.033-g.
Повний текст джерелаParisot, Jean-Paul, Jeanne Diet-Davancens, Aldo Sottolichio, Elise Crosland, Chloé Drillon, and Romaric Verney. "Modélisation des agitations dans le bassin d’Arcachon." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2008. http://dx.doi.org/10.5150/jngcgc.2008.042-p.
Повний текст джерелаBAKADILA-MONA, Yvon, Hypolite ODIKA, and David BILEMBI. "Perspectives des ressources minérales offshores du bassin côtier congolais (Congo-Brazzaville)." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2020. http://dx.doi.org/10.5150/jngcgc.2020.094.
Повний текст джерелаPERHERIN, Céline. "Étude d'agitation dans le bassin de Port 2000." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2010. http://dx.doi.org/10.5150/jngcgc.2010.013-p.
Повний текст джерелаPedreros, Rodrigo, Sophie Lecacheux, Aldo Sottolichio, Emmanuel Romieu, Déborah Idier, Paulo Salles, and Matthieu Delattre. "Caractérisation des vagues dans les passes du bassin d’Arcachon." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2008. http://dx.doi.org/10.5150/jngcgc.2008.026-p.
Повний текст джерелаMegnounif, A., A. Terfous, A. Ghenaim, and JB Poulet. "Rôle des crues dans la production de sédiments transportés en suspension dans un cours d’eau des bassins versants méditerranéens." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2004. http://dx.doi.org/10.5150/jngcgc.2004.038-m.
Повний текст джерелаSERGENT, Philippe, Jean-Michel TANGUY, and Hassan SMAOUI. "Influence de la durée du forçage océano-météorologique sur la formation des seiches pour des bassins portuaires de forme rectangulaire." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2020. http://dx.doi.org/10.5150/jngcgc.2020.054.
Повний текст джерелаLafon, Virginie, Vincent Marieu, Rémi Butel, Aurélie Dehouck, Jean-Marie Froidefond, and Gilles Trut. "Cartographie des faciès bio-sédimentaires du bassin d’Arcachon à partir de l’imagerie FORMOSAT-2." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2008. http://dx.doi.org/10.5150/jngcgc.2008.054-l.
Повний текст джерелаGANTHY, Florian, Aldo SOTTOLICHIO, and Romaric VERNEY. "Dynamique sédimentaire d'un estran lagunaire colonisé par un herbier de zostères (Bassin d'Arcachon, France)." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2010. http://dx.doi.org/10.5150/jngcgc.2010.031-g.
Повний текст джерелаЗвіти організацій з теми "Bassins côtiers"
Bingham-Koslowski, N., L. T. Dafoe, M R St-Onge, E. C. Turner, J. W. Haggart, U. Gregersen, C. E. Keen, A. L. Bent, and J. C. Harrison. Introduction et sommaire. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330002.
Повний текст джерела