Dissertations / Theses on the topic 'Bassin Algérien'
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Puillat, Ingrid. "Etude des tourbillons de moyenne échelle du bassin algérien et de leurs conséquences biologiques." Aix-Marseille 2, 2000. http://www.theses.fr/2000AIX22107.
Full textBougherara, Ahmed. "L'Erosion actuelle dans le Tell algérien : le cas du bassin versant de l'oued Agrioun." Aix-Marseille 2, 1986. http://www.theses.fr/1986AIX23009.
Full textLatreche, Salah. "Stratigraphie, sédimentologie et géochimie de la formation d'Illerène (Devono-Carbonifère) du bassin d'Illizi (Sahara algérien oriental)." Aix-Marseille 3, 1987. http://www.theses.fr/1987AIX30054.
Full textMezlah, Houria. "Les Mud-mounds du Devonien moyen du bassin de l'Ahnet et ses régions limitrophes (sud-ouest algérien) : sédimentologie – diagenèse." Paris, ENMP, 2006. https://pastel.archives-ouvertes.fr/pastel-00002484.
Full textThe mud-mounds with stromatactis of Givetian, occupy the western margin of the basin of Ahnet (Algeria). These monticules seem equivalent to potential tanks analyzed in sub-surface. These monticules are presented under two types of morphology which follow alignments of preferential directions, NS and NW-SE. The mud-mounds, several tens of meters thickness, are mainly made up by a heart of boundstone with stromatactis and laterally by sides made up of packstones with encrinites. The construction of the mud-mounds, of which the duration is estimated at two million years, falls under the varcus zone (lower Givetian). The principal factors of construction are initially the framework morphostructural basin and its tectonic evolution. The position of the mud-mounds on the east sides and soft anticlines is a direct consequence of the structuring imposed by the precambrian faults N-S and the intragivetian faults (N60° and N110°). The origin and the development of the mud-mounds of Ahnet are governed by the fluctuations of the sea level and they develop in external ramp which his orientation is N-S. These mud-mounds shows a good porosity (30 %) which during the hiding, is gradually filled. Secondary porosities are associated processes of fracturing, dolomitization and dissolution
Bekkouche, Djamel. "Le Silurien supérieur - Dévonien inférieur du bassin de Ghadamès (Sahara oriental Algérien) : lithostratigraphie, sédimentologie et diagenèse des réservoirs gréseux." Phd thesis, Grenoble 1, 1992. http://tel.archives-ouvertes.fr/tel-00759888.
Full textMezlah, Houria. "Les mud-mounds du dévonien moyen du bassin de l'Ahnet et ses régions limitrophes ( sud-ouest algérien) Sédimentologie - diagenèse." Phd thesis, École Nationale Supérieure des Mines de Paris, 2006. http://pastel.archives-ouvertes.fr/pastel-00002484.
Full textHemila, Mohammed Laïd. "Hydrogéologie, modélisation et gestion des ressources en eau de la plaine alluviale du bassin de l'oued de la Meskiana-Haut Mellegue (Est algérien)." Besançon, 1988. http://www.theses.fr/1988BESA2021.
Full textArab, Mohamed. "Analyse des systèmes pétroliers de l'offshore algérien oriental : quantification, modélisation stratigraphique et thermique." Thesis, Brest, 2016. http://www.theses.fr/2016BRES0130/document.
Full textThe Algerian margin is a complex domain, limited to the south by the Maghrebian internal zones (AlKaPeCa) that overthrust the external Tellian zones southward. The offshore part of this system constitutes a back-arc basin, where a mio-pliocene sedimentary series were deposited over a substratum of laterally variable origin and nature. The goal of the present work consisted in analyzing and modelling the petroleum system at work and calculating hydrocarbon volumes. Before proceeding to different numerical basin, stratigraphic and thermal modelling, a conceptual geological model is required and was performed based on field geological studies and stratigraphic and structural interpretations of the seismic profiles. The extension of the continental crust beyond the foot of the margin, allows determining a chronostratigraphic model by extrapolation of the outcroping oligo-miocene formations onshore to the acoustic pre-messinian units defined in the offshore basin. Besides, a tectonic analysis in both onshore and offshore domains gave rise to three main steps of evolution: (1) syn-rift phase where the basin was opened by transtension since Late Oligocene- Aquitanian, (2) post-rift phase in which intra-arc basins were developed, AlKaPeCa and Africa docked and magmatism activity took place, (3) inversion phase where the margin became active mainly since Quaternary times. After defining the different petroleum system elements taking into account variable uncertainties, the 2D/3D petroleum system model depicts possibilities of oil and gas accumulations mainly close to the margin, between 20 to 65 km from the coastline to the north with a maximum range of 70 km in the Bejaia Gulf
Drid, Moussa. "Sur quelques aspects de la diagénèse organique et minérale dans le bassin de Timimoun et le sillon de Sbaa, Sahara central algérien." Bordeaux 3, 1989. http://www.theses.fr/1989BOR30204.
Full textLaggoun-Défarge, Fatima. "Etude de la diagenèse organique des séries paleozoiques du bassin de Sbaa (Algérie). Approche géochimique et pétrologique." Phd thesis, Université d'Orléans, 1987. http://tel.archives-ouvertes.fr/tel-00322456.
Full textCe bassin s'individualise au sein de cette région particulièrement riche en gisements d'hydrocarbures gazeux, par des accumulations d'huile, notamment au niveau de la formation des « Grès de Sbaa » (âge : Tournaisien profondeur : 500 m ; réserves prouvées : 22 millions de tonnes).
Dans le but de comprendre les raisons de cette anomalie et de guider l'exploration pétrolière dans la région, 160 échantillons provenant de 9 sondages effectués dans le bassin ont été étudiés par les méthodes de la pétrologie et de la géochimie organiques modernes.
L'approche pétrologique a été essentiellement menée par le biais de la microspectrofluorimétrie et de la palynologie. Du point de vue géochimique, ont été notamment mis en œuvre : pyrolyse Rock-Eval, chromatographie en phase gazeuse (CPG) et couplage pyrolyse-CPG.
Par ailleurs, un concentré d'Algues Tasmanacés isolées du Silurien du sondage OTAL-1 a été soumis à une simulation de génération d'hydrocarbures (pyrolyse en milieu confiné) afin d'étudier le comportement diagénétique de ce matériel organique « pur ».
Concernant la diagénèse organique dans le bassin de Sbaa, les principaux résultats obtenus sont :
1. la roche mère effective est le Silurien de la partie nord du bassin. La génération des hydrocarbures n'a probablement pas eu lieu avant la fin du Paléozoïque. Leur expulsion a dü suivre de peu leur formation. La phase paroxysmique du cycle Hercynien est vraisemblablement responsable de la mise en place des pièges structuraux permettant leur accumulation.
2. les roches mères potentielles sont le Givétien dans la partie nord du bassin et le Silurien en général.
Par ailleurs, l'étude microspectrofluorimétrique a permis de confirmer les résultats suivants : (1) l'existence d'une corrélation entre la diminution du QF-535 des Tasmanacées et l'augmentation des teneurs en extrait chloroformique des sédiments correspondants ; (2) l'existence d'une corrélation entre la diminution du QF-535 des Tasmacées et l'enrichissement des extraits des sédiments correspondants en hydrocarbure aliphatiques saturés.
Enfin, la similitude de composition des hydrocarbures issus de la pyrolyse en milieu confiné du concentré de Tasmanacées du Silurien et de l'huile accumulée au niveau des « Grès de Sbaa » a permis de mettre en évidence la participation notable de ces Algues à la formation du pétrole du bassin de Sbaa et de confirmer l'identité de la roche mère.
Benzouai, Rabia. "Élaboration et utilisation d'un modèle de simulation pour la planification et l'exploitation des eaux superficielles d'un bassin-versant : cas de la Mafragh, extrême Nord-Est algérien." Nancy 2, 1987. http://www.theses.fr/1987NAN21003.
Full textThe mafragh's lake, an enormosly weilknown water region, she finds itself in deficit for the concentration in hers immediate surroundings, bigs consomers : annaba town more than 300. 000 hab, area of irrigation more than 16. 000 ha and metalurgic's factory of el hadjar, only for itself demands more than 20 hm3. The mobilised ressources of the moment stoned gravels and the massive of dunes of bouteldja as the cheffia'barrage cannot any more shtisfy a demand which is more and more important. The proposed adjusting is based on superficial water's mobilisation which remain less exploited. The adtusting optimisation by the more judicious conbination of resources in sight of the satisfaction of the indicated needs brought us to use a model of simulation this model is based on the topological diagram which is the right representation the proposed adjusting with all its organs of accumulation, its using areas and its rules of fuctionning. This permit to inform us on the situation at the moment and after of the satisfaction of water needs (with the posting the number of breakdown, the volum of recorded deficits and the rate of satisfaction) and analisis the behaviour of water'system of the whole lake (fluctuations of levels of barrtages before and after the supplies, the contained accounts of the evaporation. The simulation is an essential and pratical method which permit us openly of obtained results, to opt for the more reliable in the moment
Arab, Mohamed. "Analyse des systèmes pétroliers de l'offshore algérien oriental : quantification, modélisation stratigraphique et thermique." Electronic Thesis or Diss., Brest, 2016. http://www.theses.fr/2016BRES0130.
Full textThe Algerian margin is a complex domain, limited to the south by the Maghrebian internal zones (AlKaPeCa) that overthrust the external Tellian zones southward. The offshore part of this system constitutes a back-arc basin, where a mio-pliocene sedimentary series were deposited over a substratum of laterally variable origin and nature. The goal of the present work consisted in analyzing and modelling the petroleum system at work and calculating hydrocarbon volumes. Before proceeding to different numerical basin, stratigraphic and thermal modelling, a conceptual geological model is required and was performed based on field geological studies and stratigraphic and structural interpretations of the seismic profiles. The extension of the continental crust beyond the foot of the margin, allows determining a chronostratigraphic model by extrapolation of the outcroping oligo-miocene formations onshore to the acoustic pre-messinian units defined in the offshore basin. Besides, a tectonic analysis in both onshore and offshore domains gave rise to three main steps of evolution: (1) syn-rift phase where the basin was opened by transtension since Late Oligocene- Aquitanian, (2) post-rift phase in which intra-arc basins were developed, AlKaPeCa and Africa docked and magmatism activity took place, (3) inversion phase where the margin became active mainly since Quaternary times. After defining the different petroleum system elements taking into account variable uncertainties, the 2D/3D petroleum system model depicts possibilities of oil and gas accumulations mainly close to the margin, between 20 to 65 km from the coastline to the north with a maximum range of 70 km in the Bejaia Gulf
Taupier-Letage, Isabelle. "Biodynamique du bassin algérien : estimation de la réponse biologique à certaines structures hydrodynamiques de moyenne échelle par télédétection (AVHRR et CZCS) et mesures in situ." Aix-Marseille 2, 1988. http://www.theses.fr/1988AIX22049.
Full textMallil, Katia. "Circulation générale et processus de sous-méso échelle dans le bassin Algéro-Provençal de la Méditerranée à partir de données in situ." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS113.
Full textData from the SOMBA-GE2014 oceanographic cruise, allowed us to highlight the presence of Algerian gyres via current measurements. The temperature and salinity sections obtained across the basin allowed the visualization of the influence of the Algerian gyres on the hydrological distribution. Indeed, young intermediate Levantine waters extend from Saridinian LIW vein towards the interior of the Algerian basin, in the form of patches. LIW and WIW core climatologies covering the period 1960 to 2017 in the Algerian-Provençal basin were produced using the Mediterranean database of temperature and salinity profiles and new detection methods. A westward transport of LIW from the southern vein of Sardinia to the interior of the Algerian basin following the periphery of the Algerian gyres is highlighted by this climatology and confirmed by the cross-correlation of the cooling signal observed during the 1980s. The estimation of trends of LIW and WIW characteristics help to document their evolution. The acceleration of warming observed throughout the basin from 2010 is alarming. Glider observations have supported our conclusions regarding the effectiveness of mesoscale and submesoscale structures for the transport of water masses into the interior of the Algerian basin. Indeed, we observed WIW, LIW, and WMDW parcels within the Algerian Basin with more pronounced characteristics than adjacent waters
Neurdin-Trescartes, Jacqueline. "Le remplissage sédimentaire du bassin néogène du Chélif, modèle de référence de bassins intramontagneux." Pau, 1992. http://www.theses.fr/1992PAUU3021.
Full textKebiche, Mustapha. "Le bassin versant du Hodna (Algérie) : ressources en eau et possibilités d'aménagement." Nancy 2, 1986. http://www.theses.fr/1986NAN21004.
Full textStrongly marked by a mediterrenean climate with a tendency to aridity the Hodna has inherited from a pastoral society imbued with nomadic traditions. This has engenalered an organization of its area founded on the complementarity of different environments. This complementarity is linked with a constant movement of populations and herds, so, and movements of variable importance. The climati's aridity points on the weakness of precipitations on the nain part of the versant bassin. The chain of the Hodna stands as a barrier to the atmospheric disturbances coming from north. It constitues the southern limit to mediterranean influences. This situation is often aggraved by a high evapotranspiration a low vegetal cover favoring erosion. Climati's aridity does not necessarily mean absence of water, for the Hodna's inhabitants have practiced for a long time an irrigation which was based on flanned inundation, it attest for the absence of flow. Although the precipitations are weak, they fall down in the form of showers rendering the flows into swelling. Oueds, that are supplied by numerous springs, rising at the bottom of mountains, have brought not inconsiderable contributions. The following paradox : arid climate-abundance of water, is confirmed by the large potentialities of subterranean waters presented by the set up aquiferous. The improvement of hydraulic situation is most possible. It lies in the recovery of rain waters thanks to process of retain and to rational exploitation of subterranean waters so as to hope finally for an integrated development of the Hodna
Bouteldja, Nedjoua. "Contribution à la modélisation de l'érosion hydrique dans le bassin versant du Hodna "sous bassins versants du Ksob et de Soubella" (Algérie)." Aix-Marseille 1, 2005. http://www.theses.fr/2005AIX10030.
Full textMimoune, Smai͏̈l. "Gestion des sols salés et désertification dans une cuvette enddoreique d'Algérie (sud du Chott Hodna)." Aix-Marseille 1, 1995. http://www.theses.fr/1995AIX10036.
Full text- in the chemical field, where the transformations affecting the saline layer were studied : electric conductivity, ph,ionic schedule ; - in the physical field, where the affects of saline conditions and sodium on the physical characteristics of soils, where analysed : structurale state, permeability. 2 - desertification ; this theme determines the following objectives : - evaluate and understand the sterilization of soils by salinization and explain this in terme of desertificatioin. - present the percusory signs of desertification. The work focuses on the analys is of vegetation (structure and composition) and the superficial layer of the soil
Hassani, Moulay Idriss. "Hydrogéologie d'un bassin endoréique semi-aride : le bassin versant de la grande Sebkha d'Oran (Algérie)." Phd thesis, Grenoble 1, 1987. http://tel.archives-ouvertes.fr/tel-00760562.
Full textCoiffait, Philippe-Emmanuel. "Un bassin post-nappes dans son cadre structural : l'exemple du bassin de Constantine (Algérie nord-orientale)." Nancy 1, 1992. http://www.theses.fr/1992NAN10412.
Full textBoudjema, Arezki. "Évolution structurale du bassin pétrolier "triasique" du Sahara Nord oriental (Algérie)." Paris 11, 1987. http://www.theses.fr/1987PA112071.
Full textThe triassic basin is located on the saharian plat-form. It is limited northward by the alpine saharian Atlas range and southward by the Hoggar panafrican shield and its paleozoic cover. The reconstitution of the structural evolution is based on the interpretation of 350 boreholes, seismic profiles and structural field analysis:- A continental rifting phase occured during late Triassic-early Lias, with volcano-detritic and evaporitic sedimentation. - An early Cretaceous (pre-latest Aptian) compressive phase led to structural inversion with North-South trending anticlines. -A new compressive phase occured during late Eocene times, most often resulting in NE-SW compressive structures, such as anticlines and tectonic inversions. - A late Miocene compression exaggerated these NE-SW structures and tectonic inversions. - After the Villafranchian time, a North-South compression affects only the Northern limit of the bassin. These structurations give important changes of facies and thickness of the Meso-and Cenozoic formations: these variations are controlled by the ancient faults. The Hydrocarbons accumulations and their nature (gas or oil) will depend on the age of this structuration. The different tectonic phases are in good agreement with the kinematics of Africa, America and Europe
Hadjab, Makhloufi. "Aménagement et protection des milieux naturels dans la cuvette du Hona (Algérie)." Aix-Marseille 1, 1998. http://www.theses.fr/1998AIX10017.
Full textGhali, Merzoug. "Le jurassique supérieur et le crétacé basal d'Algérie, de l'Atlas saharien central au bassin tellien (Ouarsenis) : stratigraphie et évolution sédimentaire." Lyon 1, 1995. http://www.theses.fr/1995LYO10150.
Full textMessaoud, Nacer Nasreddine. "Hydrogéologie et pollution des eaux : exemple du bassin versant du Mazafran, Mitidja (Algérie)." Phd thesis, Grenoble 1, 1987. http://tel.archives-ouvertes.fr/tel-00783549.
Full textBenaïni, Boucheta. "Hydrologie et aménagement en Algérie : le bassin de la moyenne Mekerra, wilaya de Sidi bel Abbes." Nancy 2, 1988. http://www.theses.fr/1988NAN21003.
Full textAyoubi, Fadl. "Contribution à l'étude de la désertification des hautes plaines algériennes, l'exemple : le bassin versant du Hodna." Paris 1, 1990. http://www.theses.fr/1990PA010545.
Full textThe hodna basin differs greatly from other algerian steppe regions in its great hydro capacities which could serve as a base element for land improvement operations and the development of grazing and agricultural production. Its ealth is due to the fact that it plays the role of river bazsin for the wadis which descend the tellian and saharian atlas. The hodna basin, which covers a surface of 26500 km2 and runs for 250 km southeast of the capital, is located between the tellian and saharian atlas. The exploitation of its resources dates back to as far as the carthoginian period. The basin is an important source for the supply of cereals, meat, fruits and vegetables. It has also undergone some hydraulic development which can be seen in the dams, basins, reservoirs and canalization whose traces stiff exist today. Certain disturbing phenomena have, however, begun to surface in may regions of the basin. This deterioration is due to the abuse of its natural resources and the succession of wars resulting from the evolution of history, especially those of the roman era, of the french colonization and the development of nomadism by the hilatites which came from the east during the xi century. Among these alarming phenomena are soil erosion, a rise in the level of salinity and wind dominations such as the nebkas dunes
Bendjelid, Abed. "L'organisation urbaine des bassins intérieurs oranais (Algérie) : formation et fonctionnement d'un réseau urbain dans un pays à économie planifiée." Paris 1, 1990. http://www.theses.fr/1990PA010507.
Full textThis is an analysis of town planning in an inland area of Algeria; which is noted in the general process of urban growth found in the country. In the algerian development situation, the state in the main agent in town planning. The first part out lines the important characteristincs of present urban organization in the inland plains of the Oran region, a combination of small and medium sized townships; while the second part studies the principal changes concerning activities and employment, showing the new spatial migratory patterns experienced. Next, the last section is devoted to approach of territorial strategies and spatial drives. Conflicting interests between state and private participants are clearly brought out in the spatial tactics. Finally, the conclusion considers the general reorganization in the region after twenty years of national planning
Brahamia, Khaled. "Essai sur la dynamique actuelle dans la moyenne montagne méditerranéenne bassin versant de l'oued Mina (zone de Taassalet) Algérie." Université Joseph Fourier (Grenoble), 1993. http://www.theses.fr/1993GRE19036.
Full textIn view of growing threat of the silting up of dam, of reduction of agricultural ground and of drift of the population from the moutain, study of erosion process is essentiel as the first alternative in order to resolve the probleme of the soil erosion and stabilisation of the population. This work is a contribution with a large view about integrate amenagement of bassin versant oued mina (algeria). The aim of this thesis is to contibute to the comprehension of the erosion mechanism through the case of two major erosion processes; the diffus run-off and the guly erosion. This thesis is composed of three part : the first one is a detailed description of the most influent erosion factor in the genisis erosion; the second part is deducted to presentation of different mesurements and to interpretation of the result of three year's mesurements; at last, the third part is about the global dynamic, the criticisim as the amenagement already realised and the amenagement perspective
Ouared, Ouardia. "La transition "plate-forme carbonatée-bassin" dans le Jurassique inférieur et moyen des monts du Nador (Tiaret, Algérie occidentale) : stratigraphie, sédimentologie et interprétation géodynamique." Lyon 1, 1987. http://www.theses.fr/1987LYO10020.
Full textTakherist, Djilali. "Structure crustale, subsidence mésozoi͏̈que et flux de chaleur dans les bassins nord-sahariens (Algérie) : apport de la gravimétrie et des données de puits." Montpellier 2, 1990. http://www.theses.fr/1990MON20052.
Full textChaouche, Ahmed. "Genèse et mise en place des hydrocarbures dans les bassins de l'erg oriental (Sahara algérien)." Bordeaux 3, 1992. http://www.theses.fr/1992BOR30202.
Full textGeological and geochemical characterization of paleozoic source rocks in erg oriental (algerian sahara) and hydrocarbons study have shown : -ordovician, silurian and devonian organic facies are homogeneous and sapropelic (type 2). On contrast carboniferous facies are mainly lignohumic (type 3); - organic matter maturity have undergone complex geological history conditions mostly controlled by local burial differences occuring during carbonic period together with a long thermal moderate setting; - the good residual oil potential from upper devonian black-shales on three quarters of the studied area; - the high oil generation rate of saharian shaly facies comprising mainly tasmanites; - the importance of original organic matter fingerprint for source of crude oils and their further differentiation; - time as a predominant factor versus temperature in the generation and accumulation history of crude oils; - the strong relationships between source rocks and reservoirs due to their closeness in the sediment
Beddek, Menad. "Déficit de connaissances de la biodiversité et biologie de la conservation : le cas de l’herpétofaune d’Algérie." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT167/document.
Full textAlgeria is a case study of biodiversity ignorance. To date, there are neither complete inventories for any taxa nor atlas across the country! Yet, Algeria is of great importance for global biodiversity. The coastal area of Algeria is part of the global biodiversity hostpot which is the Mediterranean perimeter and has several regional red spots of biodiversity. Moreover, the Saharan part encompasses a diversity of endemic organisms adapted to the strong conditions of drought. The Algerian authorities are deploying an ambitious project for conservation aiming to reach 50% of the country's surface as protected areas! However, the location of these protected areas and their management don’t obey to a scientific evidence based, but are rather based on experts opinion. The main aim of this thesis is the study of the biodiversity ignorance distribution in Algeria by focusing on the "Linnean, Wallacean, and Darwinian Shortfalls" and to contribute to reduce them. The first chapter aims at reducing the Linnean Shortfall by proposing 1) a first checklist of reptiles and amphibians of Algeria which is the result of an accurate review of scientific publications on these taxa in North Africa. 2) a first pre-assessment of the conservation status of reptiles and amphibians of Algeria for the production of the first national red list. The second part of this manuscript deals with the ignorance of the geographical distribution of species. The purpose of this part is to map the ignorance which is defined as the difference between the expected specific richness diversity and the observed specific richness. The predicted species richness was modelled with two approaches: 1 ecological niche modeling with the maximum entropy method (MaxEnt) to predict the suitable habitats for each species and then add the different binary layers of species presence to calculate the specific richness. 2) Minimum convex polygon method was used to create range maps of each species and were auditioned to obtain predicted species richness. Both approaches have shown the same trend at a national scale: the concentration of the richest areas along the Saharan Atlas and the high plateaux which are the transition zone between the Sahara and the the Mediterranean part of Algeria. The opposition of the Saharan with a low species richness and the northern part with a higher species richness. Finally, the Saharan massifs of the Hoggar and Tassili form a very distinct zone with a much greater wealth compared to the rest of the Sahara. In terms of gaps, in the northern part, Kabylie, El Kala National Park and the Oran region are fairly well surveyed. In the Sahara, only a few points are clearly well prospected as Biskra, Bechar and some areas of the Hoggar and Tassili. The third part deals with the distribution of genetic llineages in the Maghreb. The aim of this section is to locate the phylogeographic breaks between the divergent eastern and western populations of the Maghreb and to try to understand the mechanisms that led to this pattern of genetic diversity. To answer these questions, I carried out a comparative phylogeography on 11 species of reptiles and amphibians with continuous and wide distribution in the Maghreb. Two suture zones have been identified: one zone on the border of Algeria and Morocco, the other in Kabylia west of the Soummam valley. The divergences between the eastern clades and the western clades occurred between the pre-Messinian periods up to the plio-pleistocene boundary and were maintained in climatic refugia in the east and west of the Maghreb
Benabderrahmane, Abdelhakim. "Simulation numérique de la pollution saline d'un système aquifère dans une région semi-aride à aride : exemple du bassin de M'Sila (Hodna, Algérie)." Besançon, 1988. http://www.theses.fr/1988BESA2002.
Full textBourouba, Mohamed. "Hydrologie et érosion actuelle dans le Tell oriental (Algérie) : le cas du bassin versant de l'Oued Djendjen." Aix-Marseille 2, 1988. http://www.theses.fr/1988AIX23002.
Full textSlimi, Ahmed. "Mouvements de terrain et ravinements dans le bassin supérieur de l’Oued Djemaa (versant sud du Djurdjura, Algérie)." Thesis, Paris Est, 2008. http://www.theses.fr/2008PEST0066.
Full textThe upper basin of the oued Djemaa which includes to the mountain of Djurdjura is affected by an important morphogenesis. The ground movements introduces a large variety in the study area and play a preponderant role in the evolution of mountainsides. The geomorphology detailed study an investigation into the local populations, geotechtonic and analyses it sedimentology of displaced trainings allows us to do ground typology movement and to chow theire development factors and their location. The big rainfalls of winter and sprinter are the origin of these ground movements and gully erosions, but exposition and lithology allow to understand different forms on northern and southern slope. Human activities play more and more an important role in morphogenesis acceleration. In this study, a geographical information system has been used to provide degradation maps of risks of which are tools for planning and management of soil using in the upper basin of the oued Djemaa. He allows to cross vulnerability witch vagary. The result of these crossroads which we codified results in a total map of risk levels
Djeda, Farida. "Etude hydrogéologique et simulation par modèles mathématiques de la nappe de Khemis-Miliana (Bassin du Haut Chelif, Algérie)." Besançon, 1987. http://www.theses.fr/1987BESA2039.
Full textBouzelboudjen, Mahmoud. "Hydrogéologie et bilan de la nappe d'El Amra - El Abadia par modèles mathématiques (Bassin du Moyen Cheliff, Algérie)." Besançon, 1987. http://www.theses.fr/1987BESA2040.
Full textAkkouche, Madjid. "Application de la datation par traces de fission à l'analyse de la thermicité de bassins à potentialités pétrolières : exemple de la cuvette de Sbaâ et du bassin de l'Ahnet-Nord (plate-forme saharienne occidentale, Algérie)." Bordeaux 1, 2007. http://www.theses.fr/2007BOR13367.
Full textBadji, Rabia. "Structure profonde de la croûte et potentiel pétrolier des bassins sédimentaires à l'ouest de l'Algérie." Thesis, Nice, 2014. http://www.theses.fr/2014NICE4036/document.
Full textLocated in North Africa, the Algerian margin is bordering the Algerian basin, formed in the back of the Tethyan subduction. The importance of the study of the segment extending from Tenes to Mostaganem over 250 km, lies in its pivotal position between the continental Alborán domain to the West and the Algerian Basin to the East. In this work, we determined for the first time, the structure and the crustal nature of this segment using the tomographic inversion of the seismic data recorded along a N-S wide-angle seismic profile shot perpendicular to the margin. Thanks to the multichannel reflection seismic data acquired during SPIRAL (2009), and to industrial data, we have proposed a regional tectonic pattern and the possible offshore extension of the kabylian basement The results reveal a margin characterized by the juxtaposition of a thin oceanic crust to the North and a slightly thinned continental crust to the South on either side of a major vertical accident. This suggests that the margin is formed in a strike-slip context. The opening of the oceanic basin should result from the response to the retreat and to the tear of the lithospheric slab beneath the Gibraltar subduction, accompanied by the westward migration of the Alborán block. The propagation of this lithospheric tearing (STEP) generated a zone of strike-slip along the narrow ocean-continent transition. The offshore absence of seismicity along our segment is connected to the mechanical resistance of the margin due to rapid change of crust nature. Owing the results and compared with other regions of the world, the areas which can likely present oil potential are the ones located on the continental crust
Ketfi, Mahtali. "Contribution à l'amélioration du facteur vitesse pour l'exploration du complexe terminal dans la région d'Irlalène et application de la notion de coefficients d'hétérogénéité (Bassin d'Illizi, Sahara oriental)." Bordeaux 1, 1986. http://www.theses.fr/1986BOR10635.
Full textHamouche, Brahim. "Sédimentologie du Trias saharien de l'affleurement à la subsurface : modèle de dépôt et architecture stratigraphique : application aux affleurements de Zarzaitine et au bassin de Berkine (sahara oriental, Algérie)." Rennes 1, 2006. http://www.theses.fr/2006REN1S004.
Full textOumedjbeur, Abdelkrim. "Evaluation de la qualité physico-chimique des eaux du bassin versant du barrage de Guenitra (wilaya de Skikda, Algérie)." Chambéry, 1986. http://www.theses.fr/1986CHAMS001.
Full textMihoubi, Abdelkrim. "Les séries carbonatées du cénomanien et du turonien dans l'extrême nord-est du Sahara septentrional algérien : stratigraphie, sédimentation et diagenèse précoce." Lyon 1, 1994. http://www.theses.fr/1994LYO10198.
Full textBenabdelkader, Mohammed el Amine. "Sources et transferts des éléments majeurs et traces dans le bassin versant de la Tafna (Algérie) : approches géochimiques et hydrochimiques." Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0046.
Full textSemi-arid Mediterranean characterized by floods and sever low water and anthropogenic increasing, the North African wadis are exposed to important environment impacts. Traces metal elements contamination (ETM including rare earth elements) continues to increase and contributes to degrade aquatic environment. Traces metals elements concentrations and mobility, different processes (hydro)biogéochimiques as well as their transfer downstream, are thus affected. In this context, to evaluate the impact of these pressures, the Tafna was used as a model in this thesis to evaluate the water and sediments quality of the basin, to identify the sources and the behavior of the ETM in different hydrological conditions. ETM (Pb, Cd, Zn, Cu, Cr, Co, Ni, As), the REE (La-Yb) and the major elements, COP, COD, as well as the physicochemical parameters, were studied during several hydrological campaigns contrasting, for 10 stations and two dams, from upstream to downstream of the watershed. The results obtained show that the chemical composition of the water is influenced by lithology (presence of calcite and evaporitic minerals) which contributes to the water enrichment by Na, Mg, B, Cl, SO4, as well as by Ca and CO3 through dissolution process. The hydrological conditions and the different geochemical processes of adsorption/desorption, precipitation/dissolution, dilution influence the content and mobility of ETM in water and sediments, particularly in relation to the presence of carbonate and evaporitic formations. Enrichment and origins of sediment contamination were assessed using a combination of geochemical and isotopic indicators. High contamination in some ETM (Pb> Cd> Zn> Cu) and low enrichment for others (Al, Fe, Cr, Co, Ni) was demonstrated. Multiple local contamination sources were identified (industrial, agricultural and domestic wastes) and more diffuse pollution, notably from atmospheric deposition (gasoline, ores, aerosols). During floods, through the remobilization of particles accumulated, dams can be either secondary sources of contamination or dilution of contamination by particles from highly erosive upstream zones. Geomorphology plays a major role in slowing the transfer contamination to downstream (by sedimentation), but in high water condition there is remobilization and transfer of ETM to the Mediterranean. The elements with natural origin (Co, Ni, Cr, As) are correlated with Al, Fe and Mn, suggesting a control by oxides or clays, those of anthropogenic origin with phosphorus (Cd and Zn) or sulfur (Cu), mainly related to agricultural inputs. Cadmium and Pb are the most extractable metals upstream and downstream, but their availability is not strictly related to the degree of contamination. REE profiles in sediments are controlled by particle size and geochemical characteristics (including anomalies). Light rare earths elements were associated with clay minerals and heavy rare earths elements with coarse silt; the medium and heavy rare earths were the most extractable. Dams are wells for light rare earths from retained sediments and influence the traditional fractionation of REE erosion patterns from upstream to downstream. By highlighting the natural processes impact (hydrological, geochemical and erosion) and anthropogenic disruptions (discharges, dams) by the REE and various geochemical and isotopic tools combined, this innovative work for semi-arid carbonate systems could be used for other similar basins subjected to various pressures (erosion and anthropization). Repository recommendations and a set of geochemical and statistical data and tools are provided
Tournier, Florent. "Mécanismes et contrôle des phénomènes diagénétiques en milieu acide dans les grès de l'Ordovicien glaciaire du bassin de Sbaa, Algérie." Paris 11, 2010. http://www.theses.fr/2010PA112133.
Full textMajor hydrocarbon reservoirs from North Africa are located in the Cambro-Ordovician sandstones, which partly originate from a glacial environment (Late Ordovician). In several intracratonic basins of North Africa, like the Sbaa Basin (Algeria), glacial Ordovician deposits are well developed (150 to 300m thick). These deposits are composed of very fine to coarse-grained sandstones, locally intercalated with clayous siltstones. Glacial Ordovician sandstones display high lateral and vertical variations of porosity and permeability, mostly controlled by burial diagenetic processes, and in a lesser extent by sedimentary facies. Although many aspects of sandstone diagenesis are well-studied, the character and processes of glacial-associated diagenesis remain unknown. Therefore, the main objectives of this thesis are (i) to assess the diagenetic history of Cambro-Ordovician sandstones of the Sbaa Basin, (ii) to understand the structural and sedimentological control on diagenesis, and (iii) to determine and quantify the role of diagenesis on the reservoir poro-perm evolution
Mahtali, Kefti. "Contribution à l'amélioration du facteur vitesse pour l'exploration du complexe terminal dans la région d'Irlalène et application de la notion de coefficients d'hétérogénéité (Bassin d'Illizi, Sahara oriental)." Bordeaux 1, 1986. http://www.theses.fr/1986BOR10872.
Full textMahtali, Kefti. "Contribution à l'amélioration du facteur vitesse pour l'exploration du complexe terminal dans la région d'Irlalène et application de la notion de coefficients d'hétérogénéité (Bassin d'Illizi, Sahara oriental)." Bordeaux 1, 1986. http://www.theses.fr/1986BOR10682.
Full textJati, Mohamed. "Le passage Cénomanien-Turonien du continent nord africain (Maroc,Algérie,Tunisie). Comparaison avec le bassin subalpin : apport de la sédimentologie et de la géochimie isotopique." Strasbourg 1, 2007. http://www.theses.fr/2007STR1GE10.
Full textThe analysis of serial sections series across the platform to basin transition in various palaeogeography contexts allowed to determine the sequential context of the Cenomanian-Turonian boundary judged often as transgressif. The sequential heterogeneousness seems to be the rule in the passage on a short interval time, during which show themselves phenomena of oceanic anoxia. The δ13C anomalous characteristic to the Cenomanian-Turonian boundary is interpreted as the result of a global phenomenon which is added a local signature (local tectonics, subsidance). This anomalous can be a tool of correlation with high resolution is within a pond or enters various pond studied. It seems delicate to use the biozons of planctic foraminifera in the absence of all other independent signal (as δ13C) to establish correlations which want in high resolution
Touazi, Mustapha. "Evaluation des ressources en eau et acquisition de bases de données à références spatiale et temporelle en Algérie du nord." Nice, 2003. http://www.theses.fr/2003NICE2022.
Full textBekhouche-Guendouz, Nadia. "Evaluation de la durabilité des exploitations bovines laitières des Bassins de la Mitidja et d'Annaba." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL020N/document.
Full text121 dairy farms of the Mitidja and Annaba basins were the subject of an investigation to collect information on their structure, the land use, and the economic management. A typology of the exploitations made it possible to identify eight types of farming systems differing by manpower, herd size, cultures and practices. The sustainability of these farms was evaluated using 37 indicators describing the agro-environmental, socio-territorial and economic scales. Five groups of systems were identified according to their sustainability scores. The farms of the area of Annaba have higher scores for total and agro-environmental sustainability than those of Mitidja. This study shows the influence of the production system on the parameters contributing to estimate the dairy farms sustainability, particularly with regard to the stock fodder management and the diversification of the cultures. The economic objectives are more important than the social component (formation, social link, isolation). The dynamics of the exploitations were studied by the way of the passed evolutions compared to their actual position as well as to their foreseeable evolutions from recommendations suggested to the stockbreeder. This study showed the assets and the weaknesses of these systems and provides a method usable by the decision makers as well as by the actors of the agricultural sector at various levels of decision, allowing them to elaborate strategies in a perspective of sustainable development