检索结果-南通市图书馆

Journal of Water Resource and Protection 2024年第1期16卷 83-101页

作者： Kouadio Michel Yao Tanina Drissa Soro Tanoh Jean Jacques Koua Akaie Jean Fabrice Tchakray Yao Emile Desmond Konan brou dibi Laboratory of Sciences and Technologies of Environment University Jean Lorougnon Guede Daloa C&ocircte d’Ivoire

The main objective of this study is to determine the hydrogeochemical specificities of the groundwater of the Angovia mine operating permit, located in the Yaouré mountains in the center-west of Côte d’Ivoire. To do so, descriptive and multivariate statistical analysis methods with the SOM (Self Organizing Maps) algorithm were applied to the physicochemical parameters of 17 boreholes using the calcite (ISC) and dolomite (ISD) saturation indices. The results obtained have shown that the groundwater in the Angovia mine operating permit area has an average temperature of 27.52°C (long rainy season) and 27.87°C (long dry season) and has an average pH of 7.09 ± 0.35 during the main rainy season and 7.32 ± 0.35 during the main dry season. They are mineralized with an average electrical conductivity of 505.98 ± 302.85 μS/cm during the long rainy season and with 450.33 ± 233.74 μS/cm as average during the long dry season. The main phenomena at the origin of groundwater mineralization are water residence time, oxidation-reduction and surface inflow. The study of the relative age of the water shows that the groundwater in the Angovia mine operating permit area is mainly undersaturated with respect to calcite and dolomite. They are therefore very old in the aquifer with a slow circulation speed during the long rainy season and the long dry season.

关键词： Hydrogeochemistry Mineralization Fissure Aquifers Operating Permits The Angovia Mine

Development of a Model for Assessing Vulnerability to Pollution of Groundwater in Fissured Aquifers: The Case of the Ehania Watershed (South-Eastern Côte d’Ivoire)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Protection 2021年第1期12卷 1-12页

作者： brou dibi Arthur Brice Konan-Waidhet Valérie Plagnes Jean Biemi UFR Environment/Jean Lorougnon Guedé University Daloa C&ocirc te d’Ivoire UMR METIS/Sorbonnes University Paris France UFR STRM/Felix Houphouet Boigny University Abidjan C&ocirc te d’Ivoire

The protection of aquifers is a major concern for the authorities, especially in areas where there are large agro-industrial exploitations. The objective of this study is to define a new method of aquifer protection based on the characteristics of the structures of aquifers. The intrinsic vulnerability mapping method, PaPRI was used. It is a variant of the PaPRIKa method applied in karstic environment which has been adapted for its application in basement environment. This method uses three factors, including aquifer protection (P), using the soil cover, the unsaturated zone and the thickness of the alteration layer, (R) for the rock type and (I) for infiltration which including slope and drainage density. PAPRI is a method based on the weighting of different factors. The results obtained show 4 classes that evolve from low vulnerability classes (5% of the study area) to high and very high vulnerability classes (58%) and average vulnerability classes (37%). The classes of high and very high vulnerability, which indicate the zones that are very exposed to pollution, are more present in the central-northern part of the study area, with a few appearances towards the south. These zones could be related to topography due to the often very high slopes observed in the area. One of the advantages of this new method lies in the characterization of the alterations that strongly influence the migration of pollutants towards the water tables according to their nature and their thickness.

关键词： Vulnerability to Pollution Groundwater PaPRI Fissured Aquifer Ehania Watershed Côte d’Ivoire

Elaboration of a Cartographic Model of Zones Favorable to the Implantation of Water Points: Case of the Watershed of Ehania, South-East of Côte D’Ivoire

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2019年第12期11卷 1503-1514页

作者： dibi brou Konan-Waidhet Arthur Brice Kouadio Boyossro Hélène Savané Issiaka Jean Biemi Department of Environment University of Jean Lorougnon Guedé Daloa Cote D’Ivoire Department of Earth Sciences and Mining University of Felix Houphouet Boigny Abidjan Cote D’Ivoire Department of Environment Management University of Nangui Abrogoua Abidjan Cote D’Ivoire

The supply of drinking water from aquifers of base remains problematic because of his complexity. The combination of several methods is more adapted for the mapping of water establishment favorable areas. This study is focused on water points establishment favorable areas mapping. The methods used are remote sensing, pump tests sheets for determining aquifers and saprolites thickness. To determine the recharge, GR2M Method and drainage density has been used. The digital elevation model (DEM) has been used to generate slopes and drainage density maps. The thematic maps obtained combined under GIS to produce water potentiality map. The results obtained have been with exploitation rates. Three classes of potentialities have been identified. These are classes of high potentialities in groundwater which cover approximately 20% of the study area. It occurs mainly in central areas where there are sedimentary formations usually captured by the drilling. These areas are generally located in the central part, mainly in areas where there is low slope, important with a thick layer of saprolites.

关键词： Drinking Water Bases Aquifers GIS Multicriteria Analysis (MCA) Water Points Establishment

Modeling of Quaternary Groundwater Pollution Risk by GIS and Multicriteria Analysis in the Southern Part of Abidjan District(Cote d’Ivoire)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Protection 2013年第11期4卷 1213-1223页

作者： Innocent Kouassi Kouame Aristide Gountoh Douagui Kouadio Koffi brou dibi Lazare Kouakou Kouassi Issiaka Savane Laboratoire de Geosciences et Environnement Universite Nangui AbrogouaAbidjanCote d’Ivoire Universite Jean Lorougnon Guede DaloaCote d’Ivoire

The pollution generated by human activities in the area “Vridi canal-Grand Bassam” puts more at risk the quaternary groundwater that supplies water to a large part of the population of the southern part of Abidjan city. This paper deals with the combined approach of geographic information systems and multicriteria analysis to delineate areas at risk of pollution of groundwater in the study area. The multicriteria analysis also incorporated the statistical and geostatistical techniques for defining the factor ratings and weightings of all the parameters under a GIS environment. The criterion for these factor ratings and weightings was the correlation coefficient of each parameter with the nitrates concentration in groundwater. Two indicators were combined for creating situations of pollution risks according to their importance: the intrinsic vulnerability indicators which combined the depth to groundwater, the net recharge, the slope, the soil media, the unsaturated hydraulic conductivity and extrinsic vulnerability characterized by the land use. The results showed that all to the site presents nitrate pollution risks with 50.7% of moderate risk, and 49.3% of high and very high risks. The areas which present the highest risks of pollution are the densely urbanized communes of Treichville, Marcory, Koumasi, Port-Bouet and Grand-Bassam. The sensitivity analysis indicates that parameters causing high sensitivity on the nitrate pollution risks map are the depth to groundwater and the recharge. The errors committed on the maps establishment are ±0.15%, ±0.40% and ±6% respectively for IV map, EV map and pollution risk map.

关键词： Pollution Risk Quaternary Groundwater GIS Multicriteria Analysis Sensitivity Analysis Abidjan

Assessment of Vulnerability to Groundwater Pollution in the Lobo Watershed at Nibéhibé(Central-West, Côte d’Ivoire)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2020年第8期12卷 657-671页

作者： Yiwa Monique Kamenan Oi Mangoua Jules Mangoua brou dibi Sampah Eblin Georges Kouakou Lazare Kouassi Kouamé Auguste Kouassi Laboratory of Science and Technology of Environment Jean Lorougnon Guédé University Daloa C&ocirc te d’Ivoire Laboratory Geosciences et Environment Nangui Abrogoua University Abidjan C&ocirc te d’Ivoire

Drinking water supply to people in rural areas is increasingly oriented towards the search for groundwater. However, these resources, which were once of good quality, are currently threatened by various sources of pollution points and diffuse. The objective of this study is to map the intrinsic vulnerability to groundwater pollution of the Lobo watershed in Nibéhibé. The intrinsic vulnerability mapping method, PaPRIKa adapted or PaPRI which acronym is the protection of aquifers (Pa) based on three criteria: P for protection, R for rock type, I represents infiltration was used. The results show three (3) vulnerability classes, which are moderate, high and very high. This map shows that the high vulnerability class (89%) dominates the study area. This predominance shows that the groundwater of the Lobo watershed is at high risk of pollution.

关键词： Pollution Groundwater Vulnerability PaPRI Côte d’Ivoire

Indices of Water Quality and Pesticide Monitoring Survey in Lake of Western Cote d’Ivoire and Its Human Risk Assessment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Natural Resources 2020年第2期11卷 46-69页

作者： Kouame Kouakou Benoit Konan Kouakou Seraphin Konan Koffi Felix Boussou Koffi Charles Kouame Kouame Martin dibi brou Laboratory of Geosciences and Environment University Jean Lorougnon GuedeDaloaCote d’Ivoire Laboratory of Ecology Biodiversity and EvolutionUniversity Jean Lorougnon GuedeDaloaCote d’Ivoire

The aims of the work were to study the current quality of the water in Lake DOHOU used for drinking water supply through several physical, chemical analyses and using water quality indices (WQI). In addition, the question was whether the populations are at risk after drinking water of lake following a reduction of 50% and 75% in the median and maximum values of pesticides. Thus, the results of the pesticide monitoring program were incorporated into probabilistic human health risk assessment exercises. Water samples were collected over a period of one year. Pesticides were subjected to solid phase extraction and then analyzed using gas chromatography coupled to tandem mass spectroscopy. The other parameters were measured according to conventional methods. The results showed that the most frequently detected pesticides were aldicarb (79%), simazine (79%) and monolinuron (44%). They also showed the mean values of concentrations exceeding 1.5 μg/L. Metoxuron detected at a frequency of 29% showed the maximum average concentration (13.46 μg/L). Nearly 98% of the sampling points had at least one substance with an average concentration above the quality standard (0.1 μg/L) and 80% did not meet the total concentration standards. Cumulative risk quotient estimates after 50% or 75% abatement for frequently identified pesticides were greater than unity when extreme?values for adults and children were considered. To determine the suitability of water for aquatic life, drinking water consumption and drinking water production, the water quality index (WQI), the heavy metal pollution (HPI) and the heavy metal evaluation (HEI) were calculated. The poor quality of the water was mainly related to pesticides, organic matter and microbiological parameters. Most of the nutrients and metals studied were often below the standards of drinking water and aquatic life. The Water Quality Index (WQI) has shown that water quality is degrading for these three modes of use and ranges from poor to m

关键词： Pesticides Health Risk Assessment Water Quality Index Heavy Metal Index

Prospects for Minimizing the Potential Environmental Impacts of the Hydro-Agricultural Dam of M’Bahiakro(Cote d’Ivoire)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2013年第9期5卷 847-853页

作者： Lazare Kouakou Kouassi Innocent Kouassi Kouame Seraphin Kouakou Konan brou dibi Soumahoro Moussa Diakaria Kone Dago Gnakri Laboratoire des Sciences de l’eau et de l’Environnement Universite Jean Lorougnon GuedeDaloaCote d’Ivoire Laboratoire Geosciences et Environnement Universite Nangui AbrogouaAbidjanCote d’Ivoire Projet d’Aménagement Hydroagricole de la Vallee du N’Zi ONDR_MINAGRIDimbokroCote d’Ivoire Office National de l’Eau Potable(ONEP) Direction des Ressources en EauAbidjanCote d’Ivoire

This study aims at characterizing the physical environment and suggesting solutions for a better management of the hydro-agricultural dam of M’Bahiakro which is being constructed over the N’Zi River and is the first inflatable dam in Cote d’Ivoire. In this survey, data related to hydrology, characteristics of the dam and the irrigated rice production area were obtained with the Water Resources Agency and the National Office of Rice Development of Cote d’Ivoire. Physicochemical parameters of the N’Zi River were collected seasonally at three monitoring stations. Results showed that the N’Zi River is characterized by a high water level period from April to November and a low water level period from November to April. The gap between the low flows and the high flows is important (about 206 m3/s on average). The annual average flow is 40 m3/s with a standard deviation of 32.52 m3/s and a variation coefficient of 0.88. The SAR average value (1.63) and the average conductivity (78.44 μS/cm) showed that waters of the N’Zi River are of high quality to be used for irrigation. Suspended sediment concentrations do not present significant difference along the river. But the seasonal variations are important;they are higher during the rainy seasons (45.8 mg/L on average) than in the dry seasons (17.7 mg/L on average). The annual solid flux of the N’Zi River is 41897 tons, i.e. 15810 m3 of sediments. The annual sediment flux is important and can lead to high depositions in the line-shaped reservoir of the dam and that calls for attention to control the silting up of the reservoir. Great efforts concerning interdisciplinary approaches, as well as extensive and intensive field work are needed in order to better manage the hydro-agricultural dam of M’Bahiakro.

关键词： Hydrology Irrigation Dam Suspended Sediment N’Zi River

Characterization of the Origin of Pollutants in Groundwater from Biostatistical Tests:The Case of Catchment Ehania,South-Eastern Cote d’Ivoire

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2013年第12期5卷 1178-1185页

作者： brou dibi Arthur Brice Konan-Waidhet Felix Koffi Konan Charles Sagne Yao Alex Kouadio Zile Issiaka Savane Dago Gnakri Universite Jean Lorougnon Guede Daloa DaloaCote d’Ivoire Universite Nangui Abrogoua AbidjanAbidjanCote d’Ivoire

The threat of agro-industrial exploitations on the quality of groundwater resources has become a major concern for the world’s population, mainly in agricultural areas. To solve this problem, several methods such as vulnerability to pollutants and statistics methods, have been adopted to protect these groundwaters. In this study, statistical tests were used to determine the likely source of pollutants in the groundwater resources. First, we made a comparative analysis and then analyzed pollutants parameters using Kohonen self-organizing map (SOM) which allows basic on the similarity to help out any correlation between the physic-chemical parameters. To validate these results, a land use map was developed to identify the sources of pollutants in production functions of different activities taking place on the catchment area. The results indicate very high levels of certain pollutants such as NO3-, Cl- and SO42- with generally higher than World Health Organization (WHO) standards values. These high levels observed could be attributed to the generally free nature of aquifers alteration and sedimentary formations in areas of high agro-industrial production. The analysis of the data from SOM method reveals a strong correlation between pollutants (NO3-, SO42-,Cl- ) and conductivity showing the likely origin of these surface pollutants,an origin that is linked to the existence of larges agro-industrials exploitations. These results are reinforced by those of the overlay map of the sampling sites on the land use map, which shows a strong coincidence between high values of pollutants and production areas of the pollutants that are agro-industrial exploitations. These areas of coincidence are observed in the north where found banana’s industrials plantations that are less visible and mostly in the southwest part where is one of the largest oil palm plantations in the world (36,000 hectares).

关键词： Characterization Origin of Pollutants Groundwater Biostatistical Tests Catchment Ehania

Mineralization of Natural Spring Water in the City of Daloa (West-Central Côte d’Ivoire)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geoscience and Environment Protection 2020年第12期8卷 200-210页

作者： Eblin Sampah Georges Konan Kouakou Séraphin Ohou-Yao Marie-Jeanne Adélaïde Mangoua Oi Mangoua Jules dibi brou Kouassi Kouakou Lazare Department of Earth Sciences Jean Lorougnon Guédé University of Daloa Cote d’Ivoire

The water from natural springs in the city of Daloa is increasingly used by the population for its drinking water needs, even though its quality remains unknown. This study aims to determine the acquisition mechanism of the mineralization of these waters. Thus, physicochemical analyses were carried out on 10 spring water samples in February 2019. A summary statistical analysis of the results obtained shows that these waters are acidic (4.81 ≤ pH ≤ 5.39) and very weakly mineralised, with 50% of the conductivities below 100 μS·cm-1. The average iron (0.5 ± 1.02 mg/L) and manganese (0.61 ± 0.90 mg/L) contents show that these two parameters are increasing in the spring water. The Normalized Principal Component Analysis (NPCA) shows that mineralization is mainly controlled by surface inputs of elements (anthropogenic pollution), then the oxidation-reduction phenomenon and, finally, the water-rock contact (mineralization-residence time). Otherwise, the very low expression of water-rock contact (mineralization-residence time) in the acquisition of the mineralization reflects a short residence time of the water in the aquifer.

关键词： NPCA Mineralization Natural Spring Daloa Côte d’Ivoire

Potential Groundwater Pollution Risks by Heavy Metals from Agricultural Soil in Songon Area(Abidjan,Cote d’Ivoire)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Protection 2013年第12期4卷 1441-1448页

作者： Innocent K.Kouame Lazare K.Kouassi brou dibi Kouame M.Adou Ioan D.Rascanu Gheorghe Romanescu Issiaka Savane Ion Sandu Laboratoire de Geosciences et Environnement Universite Nangui AbrogouaAbidjanCote d’Ivoire Alexandru Ioan Cuza University ARHEOINVEST Interdisciplinary PlatformScientific Research and Conservation of Cultural Heritage LaboratoryIasiRomania Universite Jean Lorougnon Guede DaloaCote d’Ivoire Romanian Waters National Administration Prut-Barlad Water BranchIasiRomania

The soil samples were collected taking into account the land use in Songon area. The hydraulic conductivity (K) of soils was characterized in-situ when specific yield (Sy), pHw and concentrations of Cooper, Iron, Zinc, Cadmium, Chromium and Lead were measured in the laboratory. Pollution load indices (PLI) were calculated to evaluate the soil contamination levels. The soils were neutral and alkaline (6.7≤ pH ≤ 9.20), permeable (1.9 í 10-5?m·s-1?≤ K ≤ 8.2 í 10-4?m·s-1), with a high specific yield (13.33% ≤ Sy ≤ 33.33%) which can favor the pollutants transfer. The heavy metals (Fe, Cu, Zn, Cd, Cr and Pb) have very high concentrations in soils. The integrated pollution indices (PLI) indicate that almost 70% of Songon soils are moderately contaminated by the investigated heavy metals, with windows presenting high indices of pollution related to the intensive use of fertilizers and pesticides. The establishment of new boreholes in the Songon area should consider these heavy metals, so as to avoid the risk of groundwater pollution due to the physical properties of soils.

关键词： Songon Soil Heavy Metals Pollution Indices Groundwater Pollution Risk Abidjan