Relevant bibliographies by topics / Casamance basin

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  2. Dissertations / Theses

Academic literature on the topic 'Casamance basin'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Casamance basin"

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Thiam, El-Hadji Ibrahima, and V. P. Singh. "Spatial and temporal variability of salinity in Casamance River Basin, Southern Senegal, West Africa." Hydrological Processes 12, no. 7 (1998): 1095–110. http://dx.doi.org/10.1002/(sici)1099-1085(19980615)12:7<1095::aid-hyp626>3.0.co;2-e.

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Villeneuve, Michel, François Fournier, Simonetta Cirilli, et al. "Structure of the Paleozoic basement in the Senegalo-Mauritanian basin (West Africa)." Bulletin de la Société Géologique de France 186, no. 2-3 (2015): 193–203. http://dx.doi.org/10.2113/gssgfbull.186.2-3.193.

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Abstract The interpretation of 2D seismic surveys from the Senegalo-Mauritanian basement and the reappraisal of rock-samples from oil exploration drillings provide new insights into the structure of the Appalachian-Mauritanian belts and the overlying Carboniferous and Permian basins. Two different units have been evidenced below the Mesozoic sedimentary cover : a lower unit (Unit 1 : basement) and an upper unit (Unit 2 : Late Palaeozoic basins). Unit 1 shows two distinct tectonic areas : the northern area with two different belts evidenced on both sides of the Senegalese block and the southern area exhibiting various tilted blocks making part of the Palaeozoic (Ordovician to Devonian) Bové basin. In the northern area the Western Thrust Belt is thrust over the Senegalese block while to the east, the so-called Mauritanian belt is thrusted over the West African craton. In the Mauritanian belt area, the youngest deformed sediments belonging to the outcropping Bove basin are Famennian in age. The Mauritanian inner belt underwent two tectono-metamorphic events (circa 330 and 270 Ma). Unit 2 which is unconformably capping both the Western Thrust Belt and the southern tilted blocks of the Paleozoic Bové basin (Casamance basin) is locally affected by eastward and westward-verging thrusts. Unit 2 is dated to the Early Permian by palynomorphs, and could have formed between the early (340–320 Ma) and late (270 Ma) Variscan tectonic events. The subsurface Late Palaeozoic basins from Senegal and Mauritania are interpreted as intra Variscan belt basins, similar to those suspected by seismic investigations off shore Guinea and Mauritania.
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Faye, Cheikh, Boubacar Solly, and Sidy Dièye. "Study of the fluctuation of the NDVI in the Casamance River Basin upstream of Kolda using remote sensing data: what impact on flow?" Nippon Journal of Environmental Science 1, no. 2 (2020): 1004. http://dx.doi.org/10.46266/njes.1004.

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Diatta, Samo, Mamadou Lamine Mbaye, and Soussou Sambou. "Evaluating hydro-climate extreme indices from a regional climate model: A case study for the present climate in the Casamance river basin, southern Senegal." Scientific African 10 (November 2020): e00584. http://dx.doi.org/10.1016/j.sciaf.2020.e00584.

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Descroix, Luc, Yancouba Sané, Mamadou Thior, et al. "Inverse Estuaries in West Africa: Evidence of the Rainfall Recovery?" Water 12, no. 3 (2020): 647. http://dx.doi.org/10.3390/w12030647.

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In West Africa, as in many other estuaries, enormous volumes of marine water are entering the continent. Fresh water discharge is very low, and it is commonly strongly linked to rainfall level. Some of these estuaries are inverse estuaries. During the Great Sahelian Drought (1968–1993), their hyperhaline feature was exacerbated. This paper aims to describe the evolution of the two main West African inverse estuaries, those of the Saloum River and the Casamance River, since the end of the drought. Water salinity measurements were carried out over three to five years according to the sites in order to document this evolution and to compare data with the historical ones collected during the long dry period at the end of 20th century. The results show that in both estuaries, the mean water salinity values have markedly decreased since the end of the drought. However, the Saloum estuary remains a totally inverse estuary, while for the Casamance River, the estuarine turbidity maximum (ETM) is the location of the salinity maximum, and it moves according to the seasons from a location 1–10 km downwards from the upstream estuary entry, during the dry season, to a location 40–70 km downwards from this point, during the rainy season. These observations fit with the functioning of the mangrove, the West African mangrove being among the few in the world that are markedly increasing since the beginning of the 1990s and the end of the dry period, as mangrove growth is favored by the relative salinity reduction. Finally, one of the inverse estuary behavior factors is the low fresh water incoming from the continent. The small area of the Casamance and Saloum basins (20,150 and 26,500 km² respectively) is to be compared with the basins of their two main neighbor basins, the Gambia River and the Senegal River, which provide significant fresh water discharge to their estuary.
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Jacobs, Bart. "Embedding Papiamentu in the mixed language debate." Journal of Historical Linguistics 2, no. 1 (2012): 52–82. http://dx.doi.org/10.1075/jhl.2.1.05jac.

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This paper takes as a point of departure the hypothesis that Papiamentu descends from Upper Guinea Portuguese Creole (a term covering the sister varieties of the Cape Verde Islands and Guinea-Bissau and Casamance), speakers of which arrived on Curaçao in the second half of the 17th century, subsequently shifted their basic content vocabulary towards Spanish, but maintained the original morphosyntax. This scenario raises the question of whether, in addition to being a creole, Papiamentu can be analyzed as a so-called mixed (or intertwined) language. The present paper positively answers this question by drawing parallels between (the emergence of) Papiamentu and recognized mixed languages.
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Gahn, Marie Cicille Ba, Fallou Niakh, Mamadou Ciss, et al. "Assessing the Risk of Occurrence of Bluetongue in Senegal." Microorganisms 8, no. 11 (2020): 1766. http://dx.doi.org/10.3390/microorganisms8111766.

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Bluetongue is a non-contagious viral disease affecting small ruminants and cattle that can cause severe economic losses in the livestock sector. The virus is transmitted by certain species of the genus Culicoides and consequently, understanding their distribution is essential to enable the identification of high-risk transmission areas. In this work we use bioclimatic and environmental variables to predict vector abundance, and estimate spatial variations in the basic reproductive ratio R0. The resulting estimates were combined with livestock mobility and serological data to assess the risk of Bluetongue outbreaks in Senegal. The results show an increasing abundance of C. imicola, C. oxystoma, C. enderleini, and C. miombo from north to south. R0 < 1 for most areas of Senegal, whilst southern (Casamance) and southeastern (Kedougou and part of Tambacounda) agro-pastoral areas have the highest risk of outbreak (R0 = 2.7 and 2.9, respectively). The next higher risk areas are in the Senegal River Valley (R0 = 1.07), and the Atlantic coast zones. Seroprevalence rates, shown by cELISA, weren’t positively correlated with outbreak probability. Future works should include follow-up studies of competent vector abundancies and serological surveys based on the results of the risk analysis conducted here to optimize the national epidemiological surveillance system.
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Faye, Cheikh, and Modou Ndiaye. "Use of Geospatial Tools in Morphometric Analysis and Prioritisation of Sub-Catchments of the Soungrougrou (Casamance Basin)." Quaestiones Geographicae, August 9, 2021. http://dx.doi.org/10.2478/quageo-2021-0024.

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Abstract The prioritisation of catchments, particularly in the context of catchment plans and management programmes, is part of water resources development. In fact, morphometric analysis assisted by geospatial technology is carried out by prioritising sub-catchments according to their natural resource availability characteristics. Information on the geomorphology and erosion factors of the study area is used in the area in the preparation of local models of ungauged sub-catchments, which otherwise lack an adequate hydrological database. The objective of this paper is to use geographic information systems (GISs) in morphometric analysis to prioritise sub-catchments of the Soungrougrou (a tributary of the Casamance River). In this respect, the integrated methodology involving morphometric aspects from geospatial technology is used. To carry out the geospatial research, basic mathematical equations used in a GIS environment were used to measure a series of aspects of hydrology such as flow length, flow length ratio, bifurcation ratio, drainage density, drainage texture, flow frequency, elongation rate, circularity ratio, form factor, relief and relief ratio. The results divided the whole catchment into three priority areas, namely high, medium and low. The results are relevant for establishing soil and water conservation plans in the Soungrougrou basin, as well as adequate groundwater production and management. The high category (sub-basins 6, 8, 14, 17 and 18) is subject to maximum soil erosion, which requires immediate intervention to avoid possible natural hazards.
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Thiam, El-Hadji Ibrahima, and VP Singh. "Space-time-frequency analysis of rainfall, runoff and temperature in the Casamance River basin, southern Senegal, West Africa." Water SA 28, no. 3 (2002). http://dx.doi.org/10.4314/wsa.v28i3.4893.

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Dissertations / Theses on the topic "Casamance basin"

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Diouf, Edouard. "Ouvrages hydrauliques et modèle de gestion de l'eau dans le bassin du fleuve Casamance (Sénégal)." Thesis, Paris 10, 2013. http://www.theses.fr/2013PA100108.

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Situé dans la partie sud du Sénégal, le bassin de la Casamance dispose de potentialités rizicoles importantes. Malgré les contraintes causées par les aléas climatiques, les populations locales ont su pratiquer la riziculture dans les zones de vallée. En revanche, la persistance des effets négatifs a eu pour conséquence la prise de conscience de la nécessité de protéger les zones rizicoles contre l’avancée du sel et de maîtriser les quantités d’eau précipitées. C’est dans ce contexte qu’une multitude de petits barrages a été mise œuvre en Casamance par différents acteurs au développement. Cette thèse fait le point sur l’état du choix de la politique d’aménagement hydro-agricole dans le bassin de la Casamance. En effet après un peu plus d’un demi-siècle d’intervention, le constat de l’insuccès des programmes de développement de la production du riz dans les bas fonds demeure.Elle propose une grille d’analyse de la situation générale à partir d’une étude à plusieurs dimensions : une dimension politique portant sur l’échelle nationale et régionale, une dimension socioculturelle basée sur le local et une dimension technique qui se rapporte aux petits barrages. La synthèse de ces trois entrées permet de formuler des modèles d’intervention mieux adaptés au contexte et aux réalités locales
Located in the south of Senegal, the Casamance basin has a significant potential for rice production. Despite climatic constraints, the local people practice paddy cultivation in the valleys. However, the persistence of negative effects has resulted in the awareness of the need to protect the rice-growing areas against the advance of salt and to improve the use of rainfall available. It is in this context that a number of small dams were built in Casamance by various development actors.This dissertation assesses the hydro-agricultural planning policies in Casamance that were implemented during the last five decades. This appraisal is quite bleak: most of the rice production development programmes did fail in lowlands. This Ph.D. proposes a framework for analyzing the overall situation through a multi-dimensional study: a political dimension at the national and regional levels, a socio-cultural dimension based on the “local”, and a technical dimension referring to small dams. The synthesis of these three entry ways enables to propose intervention models better adapted to the local context and realities
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Jammeh, Ebou. "What could be a peacemaking strategy based on relative deprivation and provention perspective in Casamance?" Thesis, Linnéuniversitetet, Institutionen för samhällsstudier (SS), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-27342.

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The Casamance conflict for decades has been unable to produce a sustained peace settlement. This project utilised among others, the relative deprivation and basic human needs satisfaction theories respectively and concludes that the conflict is underpinned by relative deprivation, strongly felt and driven by the elite group. Both the current phase as well as in the past, the conflict has been driven and to an extent manipulated by these elite, motivated by self-empowerment. Masked under the struggle of a relatively deprived masses into collective violence, seeded in a classic social conflict of a type rooted in stereotyping, marginalisation and underdevelopment, primarily driven by basic human needs dissatisfaction expressed in terms of the levels of poverty.   These stemmed in part from the colonial pass which set into motion the continuous suppression and segregation of the Casamance region. In particular, of the Diola ethnic identity thus, the conflict’s ethno nationalists dimension. This research presents a deprivation approach strategy to peace making, which among other factors includes addressing the socioeconomic and political causes of the conflict and also one that underscores the relevance of a credible third party involvement to resolving the dispute between a fractured MFDC and a reluctant Government of Senegal.
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Montoroi, Jean-Pierre. "Dynamique de l'eau et géochimie des sels d'un bassin versant aménagé de Basse-Casamance (Sénégal) : conséquences sur la gestion durable de l'écosystème de mangrove en période de sécheresse." Nancy 1, 1994. http://docnum.univ-lorraine.fr/public/SCD_T_1994_0401_MONTOROI.pdf.

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Pour lutter contre les effets néfastes d'une sécheresse prolongée, notamment la salinité élevée des eaux de surface, de nombreuses petites vallées de Basse-Casamance ont été aménagées par un barrage anti-sel. Cet ouvrage a pour fonction la collecte des eaux de ruissellement afin de les utiliser pour dessaler les sols sulfatés acides situés en amont. De la bonne utilisation de la ressource eau dépend l'avenir de la riziculture pratiquée dans ces vallées. L'objectif est d'expliquer les mécanismes mis en jeu dans la mobilisation des éléments solubles, de quantifier l'importance de ces mouvements et d'estimer les conséquences agronomiques. [. . . ]
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Dione, Ibrahima. "Polarisation des structures de soins de la Haute Casamance : entre construction nationale des systèmes de santé et recours aux soins transfrontalier." Phd thesis, Université d'Angers, 2013. http://tel.archives-ouvertes.fr/tel-00945314.

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Le bassin de santé de la Haute Casamance est à cheval sur quatre Etats que sont le Sénégal, la Guinée Bissau, la Guinée et la Gambie au destin lié par un passé de pratique territoriale commune. Toutefois, la construction des Etats au lendemain de la conquête coloniale a instauré une coupure de fait en balkanisant cet ensemble territorial par l'établissement de frontières artificielles en déphasage avec la manière dont les populations vivent l'espace à travers une différenciation propre à la typologie naturelle entre zones sahélienne, soudanienne et forestières. Le vécu spatial séculaire des populations toujours valable favorise un eternel recommencement de couture de cet ensemble territorial en faisant fi des frontières modernes. Ainsi des polarités transfrontalières se construisent en arborant un statut de centre gravité autour d'un espace commun entre plusieurs Etats. Le secteur de la santé n'y échappe pas. Des localités comme Kolda au coeur de cet espace transfrontalier attirent des populations d'une origine très diversifiée et non prévues au sein des infrastructures sanitaires. Des dynamiques de recours aux soins se sont mises en place et fortement caractérisées par une mobilité de soins qui façonne un territoire sanitaire original. Celui-ci entretient des flux de population à la recherche de meilleurs soins en relation avec l'accessibilité physique, la qualité des soins proposée en certains endroits, les activités économiques. Ce pendant, l'offre de soins ne suit pas cette logique de continuité du fait de l'absence de connexion des systèmes de soins des différents pays. C'est la conséquence d'une absence de coopération transfrontalière sanitaire qui fait de cet espace de partage un cadre sanitaire frappé par des disparités notables entre les Etats aux problèmes commun en matière d'endémicité.
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