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Perimeters of Protection Demarcation for New Boreholes of Bonoua Aquifer (Southeastern, Côte d’Ivoire) through Hydrogeological Modeling

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Journal of Geoscience and Environment Protection 2017年第11期5卷 118-138页

作者： Kouamé Kan Jean Aké Gabriel Etienne koblan armel kouadio Djé Kouakou Bernard Jourda Jean Patrice Water and Environment Sciences and Technical Laboratory (LSTEE) UFR of Earth Sciences and Mineral Resources University of Félix Houphou&#235t-Boigny Abidjan C&#244te d’Ivoire Department of Climatology and Meteorological Applications National Meteorological Direction Abidjan C&#244te d’Ivoire

Located in the southeastern of Côte d’Ivoire, Bonoua aquifer contains an enormous groundwater potential. The new boreholes have been realized in this region to support the water supply of the populations. Moreover, in this region, agriculture is the main activity, whose pesticides used to guarantee the productivity, constitute a threat for groundwater. Thus, this study was undertaken in order to design a hydrogeological model able to simulate the piezometry of the Bonoua aquifer and determine the perimeters of protection for the new boreholes. The model, carried out under the Visual Modflow interface, was designed in steady-state mode and calibrated manually from the piezometry of the year 2000. The value of the standardized root mean squared residual of 4.86% (<10%) allows to say that the calibration obtained is considered satisfactory. Also, the correlation coefficient between observed and simulated heads of 0.95 permits to confirm a good calibration of the model. Perimeters of protection values were determined by simulating the paths of the virtual particles of water from the calibrated model. The simulations show that generally, the groundwater of Bonoua aquifer flows from north to south and the piezometric levels obtained vary between 65 m in the north and 5 m in the south. Upstream radius of the closed perimeters of protection calculated from the model varies from 172 to 482 m. However, those of distant perimeters of protection vary from 2877 to 6441 m.

关键词： Boreholes Hydrogeological Modeling Perimeters of Protection Visual Modflow Bonoua Aquifer

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Hydrochemical Characterization of Groundwater in the Sub-Prefecture of Kokumbo (Ivory Coast)

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Journal of Geoscience and Environment Protection 2023年第6期11卷 169-183页

作者： armel kouadio koblan Affoué Bénédicte Koffi Aminata Diomandé Deh Serges Kouakou Kan Jean Kouamé Jean Patrice Jourda Laboratory of Soil Water and Geomaterials Sciences (LSEG) U.F.R. Earth Sciences and Mining Resources (STRM) University of Felix Houphou&#235t-Boigny Abidjan Ivory Coast University Center for Research and Application in Remote Sensing (CURAT) University of Félix Houphou&#235t-Boigny Abidjan Ivory Coast

In the Kokumbo sub-prefecture, groundwater extraction related to gold panning remains a major concern, not to mention the deterioration of its quality. Among the work carried out on water resources, no scientific interest has been shown in groundwater to characterise it. The objective of this study is to contribute to the knowledge of its physico-chemical quality. In situ measurements and physico-chemical analyses using an inductively coupled plasma optical emission spectrometer (ICP-OES) were carried out on five (5) human-powered pump (HPP) water samples and six (6) well water samples collected during low and high water seasons. The results show that the physico-chemical quality of the water, which is sometimes turbid, is satisfactory in terms of the mineralization of the borehole and well water, and the pH of the boreholes, while the temperatures of the two waters and the pH of the wells do not comply with WHO standards. The levels of major ions are recommended for consumption. The waters are classified as predominantly bicarbonate-calcium and magnesium (73%) in the dry season and in the flood season, with an equal split between bicarbonate-calcium and magnesium (45.5%) and chloride-calcium and magnesium (45.5%). The elimination of materials responsible for the turbidity of certain waters by managers or populations is essential for drinking water use. The risk linked to this element means that these turbid waters are not recommended for drinking water.

关键词： Groundwater Physico-Chemical Parameter Hydrochemical Facies Kokumbo

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Smoking Addiction and Risk Factors in Teenagers in Abidjan, Cote d’Ivoire

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Open Journal of Pediatrics 2018年第4期8卷 293-302页

作者： Ake-Assi Marie-Helene Coulibaly Amed Eboua Tanoh Francois Bherat kouadio armel Boko Kouassi Alexandre Department of Medical Pediatrics Teaching Hospital of YopougonAbidjanCote d’Ivoire Department of Public Health and Biostatistics Faculty of Medical SciencesUniversity Felix Houphouet-Boigny(UFHB)AbidjanCote d’Ivoire Service de Pneumologie CHU de CocodyAbidjanCote d’Ivoire

A prospective cross-sectional descriptive and analytical study was conducted using an individual questionnaire over a four-month period from October 04th, 2013 to February 06th, 2014 in Abidjan. It included teenagers aged from 13 to 17 who are students among which some are not attending school and living in the street for others. The purpose of this study was to describe the socio-demographic characteristics of the teenagers addicted to smoking and to determine the factors associated with smoking addiction. 446 teenagers were recruited. A prospective cross-sectional descriptive and analytical study was conducted over a four-month period from October 4th, 2013 to February 06, 2014 in Abidjan. There were 76% boys versus 26% girls. The prevalence of smoking addiction was 81.9% for teenagers not attending school and living in the street and 18.1% for teenage students. The average age of smoking initiation was 12.9 years. Sources of motivation for tobacco consumption were imitation (31.25%), curiosity (29.46%) and the desire of self-assertiveness (17.85%). Being of male sex, having non-educated parents, being in a single-parent home and in a family with more than five children were the features related to the status of teenagers not attending school and living in the street. Smoking addiction in teenagers was influenced by one of the parents smoking addiction. To address the problem of teenager addicted to smoking in Cote d’Ivoire, tobacco control interventions should be taken into account regarding to the psychosocial characteristics of teenagers, especially those living in the street.

关键词： Tobacco Teenagers School Street Children Cote d’Ivoire

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Agromorphological Characterization of Ginger (Zingiber officinale Rosc., Zingiberaceae) Accessions Grown in Côte d’Ivoire

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American Journal of Plant Sciences 2023年第11期14卷 1327-1342页

作者： Bessely armel Stéphane kouadio Léonie-Clémence Kouonon Serge Hervé Kimou Yaya Touré Sientchinhon Yéo Mongomaké Koné Unité de Biologie et d’Amélioration des Productions Végétales UFR Sciences de la Nature Université Nangui Abrogoua Abidjan C&#244te d’Ivoire Unité de Phytotechnie et Amélioration génétique UFR Sciences de la Nature Université Nangui Abrogoua Abidjan C&#244te d’Ivoire Département des Sciences et Techniques Université Alassane Ouattara Bouaké C&#244te d’Ivoire Département d’Agronomie et de Foresterie Université de Man Man C&#244te d’Ivoire

In C?te d’Ivoire, ginger (Zingiber officinale Rosc.), generally used to make a drink called “Gnamankoudji”, has become an important source of agricultural income diversification. In order to assess the agromorphological diversity of a ginger collection from different regions of C?te d’Ivoire, a survey collection of accessions was carried out in the different production zones of the country. One hundred and eighty-eight ginger accessions were collected in 15 regions and one autonomous district of C?te d’Ivoire. Analysis of variance revealed that all the variables used in this study discriminated between the ginger accessions collected. Principal component analysis revealed morphological variability of 45.931% for the first two components. Ascending Hierarchical Classification was used to classify these accessions into three groups based on fourteen quantitative characters. These three groups were formed independently of collection areas and are characterized by moderate morphological variability. This variability has been structured into three distinct agromorphological groups, with thallus (rhizome) length and width, finger width, secondary finger length and yield in tons per hectare as distinctive characters. This revealed genetic diversity could be exploited in ginger breeding and improvement programs in C?te d’Ivoire.

关键词： Sustainable Management Plant Genetic Resources Genetic Diversity Côte d’Ivoire

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