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Groundwater Geochemistry and Saltwater Intrusion in the Dakar Coastal Area, Senegal

Journal of Geoscience and Environment Protection 2022年第12期10卷 45-64页

作者： ousmane Coly diouf Lutz Weihermüller Mathias Diedhiou Edgar Y. Terence Benam Beltoungou Ndeye Maguette Dieng Seynabou Cissé Faye Harry Vereecken Serigne Faye Geology Department Faculty of Sciences and Techniques Cheikh Anta Diop University of Dakar Dakar Senegal Forschungszentrum Jülich GmbH Agrosphere Institute IBG-3 Jülich Germany

Groundwater levels and water samples were collected from 20 drinking water pumping and piezometer wells in the urban area of Dakar coastal region in the year 2019. The pH-value, electrical conductivity, as well as calcium, magnesium, sodium, potassium, chloride, sulfate, bicarbonate, and nitrate concentrations were measured to assess the hydrochemical quality of the infrabasaltic aquifer in the area. The present work carried out a hydrochemical analysis to interpret the groundwater chemistry of the aquifer. The results of this chemical analysis indicate that Na+ > Mg2+ > Ca2+ > K+ was the most dominant cation sequence in the groundwater, while Cl- > HCO3- > SO42- > NO3- was the most dominant one for anions. The chemical analysis of our samples showed, that the Cl-Ca-Mg facies was dominant in the aquifer, while Cl-Na-K and HCO3-Na-K facies represent 20% and 10% of the groundwater sampled, respectively. A comparison of the measured groundwater quality in relation to WHO drinking water quality standards revealed that 80% of the water samples are suitable for drinking purposes. Ca enrichment, Simpson ratio, ratio of sodium chloride, and calculating Base Exchange (BEX) indices for the samples revealed that the groundwater is mainly affected by three factors: seawater intrusion due to aquifer overexploitation on one hand, and freshening processes and nitrate pollution, on the other, mainly caused by the groundwater flow from the unconfined aquifer.

关键词： Coastal Groundwater Major Ions Hydrochemical Facies Anthropogenic Activities Nitrate Pollution

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Critical Factors of Vulnerability That Enable Medina Gounass (Dakar/Senegal) to Adapt against Seasonal Flood Events

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Journal of Geographic Information System 2016年第4期8卷 457-469页

作者： ousmane diouf Sané Amadou Thierno Gaye Moussa Diakhaté Mawuli Aziadekey Département de Géographie Université de Lomé WASCAL Lomé Togo Laboratoire de Physique de l’Atmosphère et de l’Océan Siméon Fongang (LPAOSF) Université Cheikh Anta Diop Dakar-Fann Sénégal Ecole Supérieure d’Agronomie Université de Lomé Lomé Togo

This paper focuses on people living in Medina Gounass where has been experiencing annually flood events during the rainy season. Besides the climatic conditions, the lack of formal amenity plan has led to the emergence of highly vulnerable urban communities, particularly through informal settlements and inadequate land management. Flood has disrupted their livelihood and caused huge loss of properties. Thus, inhabitants have a long experience of flood events. The study was carried out to assess critical aspects that led Medina Gounass inhabitants vulnerable to flood. Consequently, people in the study area have been practicing various methods at household to mitigate the probable losses. The study found that flood adaptation measures can be made more effective through community initiatives and their participation than at household level which sometimes causes harm in the neighborhood. Structural and non-structural flood management approach seems to be more efficient to alleviate Medina Gounass inhabitants from the flood problems.

关键词： Factors Vulnerability Medina Gounass Adaptation Flood

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Social Vulnerability Assessment to Flood in Medina Gounass Dakar

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Journal of Geographic Information System 2015年第4期7卷 415-429页

作者： ousmane diouf Sané Amadou Thierno Gaye Moussa Diakhaté Mawuli Aziadekey Université de Lomé WASCAL Département de Géographie Lomé Togo Université Cheikh Anta Diop Laboratoire de Physique de l’Atmosphère et de l’Océan Siméon Fongang (LPAOSF) Dakar-Fann Sénégal Université de Lomé Ecole Supérieure d’Agronomie Lomé Togo

This paper is about the assessment of social vulnerability (SV) as a critical component of comprehensive disaster risk assessment. This study was conducted in Medina Gounass Dakar, Senegal, to bring out evidence that flooding was a threat to human security. The aim of this present study is to assess the social vulnerability to flood in Medina Gounass. Survey was carried out using structured questionnaires drawn on one hundred randomly selected households. For vulnerability assessment, the Methods for the Improvement of Vulnerability Assessment in Europe (MOVE) framework and Arc GIS are used to characterize vulnerability through three key factors, namely, 1) exposure, 2) susceptibility, and 3) lack of resilience. As a result, Medina Gounass inhabitants have a particular relationship with the place they have been living for decades. Although facing diseases and many challenges in their everyday life, people actually resist the government’s relocation projects because of their symbolic relationship with the area.

关键词： Assessment Flood Social Vulnerability Medina Gounass

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Winning Hearts

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ChinAfrica 2024年第3期16卷 44-45页

作者： ALY diouf

Sinohydro and Senegal join forces to provide drinking water in ***,a subsidiary of PowerChina,is currently engaged in efforts to substantially enhance the potable water supply in Dakar,Senegal.A diligent group of Chinese and Senegalese workers is engaged in roundthe-clock efforts along the Avenue du Front de Terre prolongée,which marks the starting point of the Route des Pères Maristes,with the objective of improving the distribution network for potable water in the Dakar *** a population density of 7,277 inhabitants per square km and an estimated 1.18 million inhabitants in 2023,there is an evident and increasing need for potable *** need is further compounded by significant water loss caused by the advanced age of the pipelines,with some pipes dating back to the colonial era.

关键词： Avenue starting network

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Eau les coeurs Sinohydro et le Senegal unissent leurs forces pour l'eau potable a Dakar

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中国与非洲（法文版） 2024年第3期16卷 44-45页

作者： ALY diouf 不详

Au Sénegal,Sinohydro,une filiale de APowerChina,se consacre a I'amelioration significative de I'approvisionnement en eau potable de *** I'avenue du Front de Terre prolongée,a I'origine de la route des Peres Maristes,uneéquipe devouée d'ouvriers sénegalais et chinois s'affaire jour et nuit pour optimiser le reseau de distribution d'eau potable dans le departement de Dakar.

关键词： pour des forces

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Paving the Way

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ChinAfrica 2024年第6期16卷 24-26页

作者： GE LIJUN ALY diouf 不详

Fary Dieng has had a passion for driving since *** an adult,she obtained her driving licence a few years *** a great interest in the development of public transport,she has closely followed the Bus Rapid Transit(BRT)project in Dakar,on which work began on 28 October *** day,while visiting the site,she came across a job advertisement for drivers and immediately *** her confidence and experience,she was able to land the job,becoming the first female BRT driver in *** January,she realised her dream by taking part in the first dry runs.

关键词： Transit BRT driving

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Corridors écologiques

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中国与非洲（法文版） 2024年第6期16卷 24-26页

作者： GE LIJUN ALY diouf 不详

Fary Dieng a nourri une passion pour la conduite depuis son ***,cette《femme d'action》a obtenu son permis il y a quelques anné***ès intéressée par le développement des transports en commun,elle suivait atten tiv... 详细信息

关键词： son des pour

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Synthesis, Spectroscopic Studies and X-Ray Diffraction of Heptacoordinated Mn(II) and Co(II) Complexes with Ligands Derived from Carbonohydrazide

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Open Journal of Inorganic Chemistry 2019年第4期9卷 35-52页

作者： Thierno Moussa Seck Adama Sy Djiby Lo Papa Aly Gaye Mohamed Lamine Sall ousmane diouf Mahy Diaw Mohamed Gaye Department of Chemistry University Cheikh Anta Diop Dakar Senegal Department of Chemistry University Gaston Berger Saint-Louis Senegal Department of Chemistry University Assane SECK Ziguinchor Senegal

The ligand 1-(1-(pyridin-2-yl)ethylidene)carbonohydrazide (H4L1) and 1-(pyridin-2-ylmethylene)carbonohydrazide (H4L2) were prepared by reaction of carbonohydrazide with 2-acetylpyridine or pyridine carbaldehyde respectively in a reflux methanol solution. The complexes are prepared by reaction of the ligand with the appropriate metal salt. These complexes are well characterized by elemental analysis, IR and UV spectroscopies and their structure were determined by single X-ray diffraction technic. In the crystal of the dinuclear complex [Mn2(H4L1)2(H2O)4]·Cl4, 1) each Mn(II) center is seven coordinated by two nitrogen atom and one carbonyl atom of the one ligand and one nitrogen atom and one carbonyl oxygen atom of another ligand molecule. The coordination sphere is completed by two water molecules. Each of the carbonyl oxygen atom acts as bridge between the two Mn(II) centers. In the mononuclear complex [Co(H4L2)(NO3)(H2O)2]·(NO3);2) the Co(II) center is heptacoordinated. The ligand acts in tridentate fashion through two nitrogen atoms and one carbonyl oxygen atom. Two water molecules lie in the apical positions. One nitrate group acts in bidentate manner while the other nitrate group remains uncoordinated. In both complexes the coordination polyhedral are best described as a pentagonal bipyramid. The molecules are linked together in each case by multiple hydrogen bond interaction resulting in a three-dimensional network. The crystallographic data has been deposited in Cambridge Crystallographic Data Centre [CCDC No. 1944387 (complex 1) and 1944386 (complex 2)].

关键词： Carbonohydrazide Manganese Cobalt Complex X-Ray Diffraction

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Late Diagnosis of Turner Syndrome in Adulthood;a Case Study from the Endocrinology-Diabetology Nutrition Department of the National Hospital of Pikine Senegal

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Open Journal of Endocrine and Metabolic Diseases 2024年第5期14卷 115-122页

作者： Nafy Ndiaye Yakham Mohamed Leye Ngone Diaba Diack Mamadou Ba Bibatou Abdoulaye Leye Abdou Aziz diouf Alassane diouf Jean Pascal Demba Diop Internal Medicine/Endocrinology-Diabetology Department Teaching Hospital of Pikine Cheikh Anta Diop University Dakar Senegal Department of Gynaecology-Obstetric Teaching Hospital of Pikine Cheikh Anta Diop University Dakar Senegal Department of Human Genetic Faculty of Medicine Pharmacy and Odontology Cheikh Anta Diop University Dakar Senegal

Introduction: Turner syndrome is a rare genetic disorder characterised by the presence of one X chromosome and the absence of part or all of an X or Y chromosome and patients may experience delayed puberty and infertility. Our study aimed to evaluate the diagnostic delay in our practice and analyze the impact of this diagnostic delay on the effectiveness of patient management. Patients and Methods: Turner syndrome patients were identified from the endocrinology-diabetology nutrition department Database We examined the records of patients in whom the karyotype analysis favoured Turner syndrome. Results: We have selected 5 patients’ records of female patients with Turner syndrome. The mean age was 25, ranging from 19 to 29 years. Primary amenorrhea and characteristic dysmorphic features were observed in all patients. One married patient, who sought consultation for infertility, expressed a desire for pregnancy. Short stature was identified in 3 patients. Primary hypothyroidism and hypertension were respectively found in 1 and 2 patients. Gonadal dysgenesis was noted in 100% of cases. Karyotype analysis revealed monosomy X in 2 patients and mosaic patterns in others. All patients received estrogen-progestin treatment. Antihypertensive therapy was initiated for 2 patients. One patient is on L-thyroxine. In the short term, treatment led to the onset of menstruation after the initial months. Evaluation of treatment efficacy on internal genital organs is yet to be performed. Due to uncertain benefits at this age, growth hormone therapy was not considered for our patients. We provided counseling on assisted reproductive options for couples desiring to conceive. In our study, all patients were placed on estrogen-progestin therapy, and the response appeared favorable. Conclusion: In our practice, the diagnosis of Turner syndrome occurs very late in adulthood, at an age when growth hormone treatment is nearly ineffective. Treatment typically revolves around estrogen-progestin

关键词： Turner Syndrome Primary Amenorrhea Adult Pikine

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Pleomorphic Nasopharyngeal Liposarcoma: An Aggressive Tumor

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International Journal of Otolaryngology and Head & Neck Surgery 2024年第1期13卷 11-15页

作者： Mame Sanou diouf Sall Ahmadou Cheikhou Ndiaye Ciré Thiam Amadou Abdoulaye Diop Deguenonvo Richard Edouard Alain Diom Evelyne Siga Ndiaye Malick Diallo Bay Karim diouf Raymond ENT and Cervicofacial Surgery Department Idrissa Pouye General Hospital Grand-Yoff Dakar Senegal ENT Department Diamniadio Children’s Hospital Dakar Senegal ENT clinic Lamine Sine Diop Dakar Senegal ENT Department and Cervico-Facial Surgery H&#244pital de la paix Ziguinchor Senegal ENT and Cervicofacial Surgery Department Albert Royer Children’s Hospital Dakar Senegal

Nasopharyngeal liposarcoma is an extremely rare clinical entity. Less than ten cases have been reported in the literature. It mainly occurs in humans. The non-specificity of the clinical and radiological signs explains the difficulty of the diagnosis confirmed by anatomopathological and immunohistochemical examinations. Its pathogenesis remains obscure and often correlates with genetic abnormalities. Pleomorphic liposarcoma is its rarest subtype, remarkable for its aggressiveness and rapidity of growth. Complete surgical excision remains the treatment of choice. We report a case of liposarcoma whose diagnosis was made during histological examination coupled with immunohistochemistry. .

关键词： Liposarcoma Nasopharynx Pathology Immunohistochemistry

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