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Search Results: 1 - 10 of 1429 matches for " Kouakou Hervé Kouassi "
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Mapping of Pollution Risk of Surface Waters by Runoff from Watershed: Case of Aghien Lagoon (South of Côte d’Ivoire)  [PDF]
Konan Jean-Pierre Koffi, Yao Alexis N’Go, Diakaria Kone, Kouakou Hervé Kouassi, Savané Issiaka
Journal of Water Resource and Protection (JWARP) , 2015, DOI: 10.4236/jwarp.2015.717119
Abstract: The operating capacity of the Abidjan’s groundwater became insufficient. The deficit in drinking water resources in the District of Abidjan remains the major concern of the decision maker. The Aghien lagoon stands as one of the most interesting alternatives. However, studies show the levels of pollutions of this resource without lighting out on the causes and sources of these pollutions. The present study extends over the entire catchment of the Aghien lagoon which reveals the presence of urban areas and agricultural activity areas. This raises real concerns for the Ivorian authorities. This study suggests making cartography of the risk levels of pollution on the Aghien lagoon by the surface runoff on the watershed to enlighten the decision-makers on the possible measures to be taken for the protection of this resource. It emerges from it that the risk of contamination of the lagoon is very likely. Agricultural and domestic best practices inside the pouring pond are compulsory to fight against the pollutions of this resource.
Contribution of a Geographical Information System to the Study of Soil Loss Dynamics in the Lobo Catchment (C?te d’Ivoire)  [PDF]
Jean-Philippe Attoungbré Deguy, Alexis Yao N’Go, Hervé Kouakou Kouassi, Emile Gneneyougo Soro, Albert Tié Bi Goula
Journal of Geoscience and Environment Protection (GEP) , 2018, DOI: 10.4236/gep.2018.69014
Abstract: The Lobo watershed is highly anthropogenic since it has become the main production area for cocoa and coffee in C?te d’Ivoire. It therefore seems important to quantify soil loss by water erosion in this region. The Wischmeier modeling was used to model the main factors involved in erosive phenomena. Crosscutting of thematic maps and the application of the USLE formulas made possible to evaluate the erosion rate at the watershed scale in 1986 and 2014. Although soil is susceptible to erosion and erosivity is increased, the results indicate a growth in soil loss estimated at 90.12%. Some agroforestry efforts are still possible to help reducing those soil losses.
Prospects for Minimizing the Potential Environmental Impacts of the Hydro-Agricultural Dam of M’Bahiakro (Côte d’Ivoire)  [PDF]
Lazare Kouakou Kouassi, Innocent Kouassi Kouamé, Séraphin Kouakou Konan, Brou Dibi, Soumahoro Moussa, Diakaria Koné, Dago Gnakri
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.59085
Abstract:

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

A Survey of the Floristic Diversity of the National Park of Marahoué after the Armed Conflicts in Ivory Coast  [PDF]
Yao Sadaiou Sabas Barima, Kouassi Apollinaire Kouakou, Akoua Tamia Madeleine Kouakou, Yao Charles Sangne
Open Journal of Forestry (OJF) , 2016, DOI: 10.4236/ojf.2016.64021
Abstract: Most of the Ivorian areas designated as protected were trickled in for various agricultural activities. For these last few decades, the situation worsened in Ivory Coast because these protected areas were not guarded during the armed conflict of the years 2002-2011. The objective of this study is to assess the condition in which the floristic diversity of the National park of Marahoué (NPM) is after the armed conflicts of the years 2000. To achieve our purpose, a sampling has been conducted along five transects that go through different environments: inner the park, the edge of the park and the non-domanial property. A 20 × 20 m plot square has been settled in each of these environments along each transect and each one separated from one another by 200 m. Four (4) other pilots plots of 20 × 20 m have been built up inside the park, relatively in the protected areas. Regarding these surveys, 303 plant species have been identified among which the most important are Fabaceae (6.27%), Euphorbiaceae (5.28%) and Rubiaceae (5.28%) families. Twenty-four (24) species have a particular status according to the International Union for the Nature Conservation among which nineteen (19), and about 79.16% have been seen in the relatively protected areas. One of these species, Baphia Bancoensis Aubrév, is endemic in Ivory Coast. In the park, the agricultural activities have reduced the number of trees which diameter is over 30 cm. Although the infiltration of clandestines in the NPM started long before the beginning of the conflicts, our work nevertheless permitted to point out them. During this period, these infiltrations were accelerated mainly because these people were looking for new lands to cultivate cocoas trees.
Modeling of Quaternary Groundwater Pollution Risk by GIS and Multicriteria Analysis in the Southern Part of Abidjan District (Côte d’Ivoire)  [PDF]
Innocent Kouassi Kouame, Aristide Gount?h Douagui, Kouadio Koffi, Brou Dibi, Lazare Kouakou Kouassi, Issiaka Savane
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.411139
Abstract:

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.

Rain-Flow Modeling Using a Multi-Layer Artificial Neural Network on the Watershed of the Cavally River (C?te d’Ivoire)  [PDF]
Brou Loukou Alexis, Kouassi Kouakou Lazare, Konan Kouakou Séraphin, Kouadio Zilé Alex, Konan Koffi Félix, Kamagate Bamory
Journal of Water Resource and Protection (JWARP) , 2017, DOI: 10.4236/jwarp.2017.912090
Abstract: Water resources management is nowadays a significant stake for the world. However, missing or bad quality of the hydro-climatic historical data available of the studied area makes sometimes hydrological studies difficult. Generally, conceptual rain-flow models are designed to bring an appropriate answer with the correction of gaps and prediction of the flows. Historical hydro-climatic data of the Ity station, located on Cavally River, contain gaps which must be bridged. This study aims to establish a rainfall-runoff model through artificial neural networks for filling the gaps into the flow data series of the hydrometric station of Ity on the watershed of Cavally River. A multi-layer perceptron of feed forwards with two entries (monthly average rain and evapotranspiration) and an exit (flows) was established with flow evapotranspiration data. Comparison of the criteria of performance of the various architectures of the neural network model showed that architecture 2-3-1 gives best results. This architecture provides Nash coefficients of 75.79% and correlation linear coefficient of 95.64% for the calibration and Nash coefficients of 73.32% and correlation linear coefficient of 98.33% for the validation. The correlations between simulated flows and observed flows are strong. The correlation coefficients are 83.89% and 83.08% respectively for the calibration and validation.
Glycemic Index and Glycemic Load of Juice from Edible Wild Fruits (Adansonia digitata, Tamarindus indica and Parkia biglobosa) Consumed in Côte d’Ivoire  [PDF]
Antoine Kouamé Kouassi, Nestor Kouakou Kouassi, Maxwell Avit Grah Beugré, Denis Yao N’Dri, Georges N’Guessan Amani, Dago Gnakri
Journal of Biosciences and Medicines (JBM) , 2018, DOI: 10.4236/jbm.2018.61007
Abstract: The diabetes mellitus is a public health problem in C?te d’Ivoire. The Glycemic index (GI) and the Glycemic load (GL) determination of commonly consumed foods such as juice fruits is an alternative to prevent metabolic diseases. This study carried out three wild fruits locally named Baobab (Adansonia digitata), Tomi (Tamarindus indica) and Néré (Parkia biglobosa) collected at maturity stage. The juices from the pulp of fruits have been elaborated, pasteurized, submitted to microbiological and physicochemical analysis before GIs/GLs determination. Ten healthy subjects with body mass index and age average respectively 21.57 ± 1.06 and 28 ± 2 years old tested the three juices and glucose (50 g) as reference food. Blood samples have been collected at 0, 15, 30, 45, 60, 90 and 120 min after foods consumption. The GIs/GLs has been determined according to ISO/FDI 26642:2010 protocol. Data showed that pasteurized juices has a weak microbiologic load (1.0102 - 2.4102 of Mesophylls Aerobic Germs) and not contain pathogen germs. The GI and GL of Néré juice are high with respective values of 89.54 ± 1.63 and 29.22 ± 4.09 whereas those of Baobab and Tomi juice are moderate with respective GI/GL values of 66.48 ± 2.12/13.24 ± 1.99 and 60.41 ± 2.63/12.87 ± 1.67. The juice of Néré should be consumed occasionally when those of Baobab and Tomi should be consumed with moderation. It would be suitable to know more about the GI and GL of all the juice fruits produced locally so as to prevent efficiently diabetes mellitus in the country.
Influence of Post-Harvest Storage Technologies on Weight and Rate Losses and Sensory Profile of Cola Nuts (Cola nitida) Produced in C?te d’Ivoire  [PDF]
Jean-Marc N’Guessan, Elisée Yapi Kouakoua, Nestor Kouakou Kouassi, Georges N’Guessan Amani
Open Journal of Applied Sciences (OJAppS) , 2018, DOI: 10.4236/ojapps.2018.89028
Abstract: The conservation of cola nuts (Cola nitida) poses a real problem in Côte dIvoire because of the post-harvest losses. The objective of this study was to evaluate the impact of post-harvest technologies on organoleptic and physical properties of cola nut during storage. A biopesticide, glucose syrup and biopesticide + glucose syrup were applied to fresh cola nuts before conditioning and kept at 28°;C for 6 weeks. Physicochemical and sensory analyses were performed to check the quality of the nuts during storage. The results showed that the biopesticide keep cola nuts better than the others methods with only 11.66% ± 3.04% and 13.66% ± 3.95% of loss rates for white and red cola nuts respectively. Cola nuts treated with bio-pesticide retain significantly their freshness with 62.00% ± 1.15% of moisture for white nuts and 64.00% ± 2.00% of moisture for red nuts compared to those treated with glucose syrup and bio-pesticide + glucose syrup (56.66% ± 1.15%). Cola nuts treated with biopesticide have a better acceptability compared to those subjected to others treatments. The use of biopesticide for the storage of cola nuts minimizes the losses and maintains the quality whatever the type of cola.
Assessment of Wells Water Quality and their Suitability for Drinking in M'Bahiakro City (C te d'Ivoire)
Kouassi Innocent KOUAME,Kouakou Séraphin KONAN,Kouakou Lazare KOUASSI,Brou DIBI
International Journal of Conservation Science , 2012,
Abstract: The present study was carried out to assess the quality and the suitability of the well waters for drinking in M’bahiakro city (centre-east of C te d’Ivoire). The work was performed on 71 wells in February 2012 (dry season) and June 2012 (rainy season). Groundwater levels and physico-chemical parameters (pH, temperature, electrical conductivity, redox potential (Eh), Total Dissolved Solid (TDS) and Salinity) were measured to assess the water table fluctuation and the groundwater quality. Standardized Principal Component Analysis (SPCA) was calculated to group the well waters and to evaluate their suitability for drinking according to different classes. Water table varies between 125 and 135 m during the dry season and between 127 and 136 m during the rainy season with a West-Est flow direction. The recharge values ranged between 0.57 m and 5.57 m. Wells waters are generally acidic (pH<6.5), high mineralized with conductivities and Total Dissolved Solids (TDS) respectively above 600 μS/cm and 300 mg/l. Well water salinity values ranged between 0.30 and 0.5%. The Standardized Principal Component Analysis (SPCA) allowed distinguishing three important groups of water within M’bahiakro area: the first group of wells with high mineralized water, the second group of wells with high potential redox (Eh) and the third group of wells with pH closer to neutral. The first and second groups are not very suitable for drinking because they are suspected of being contaminated by anthropogenic sources such as septic tanks and wild dump. Waters of these wells need to be treated before any domestic use.
Occurrence of Enterobacter sakazakii (Cronobacter) and Other Enterobacteriaceae in Commercial Powdered Infant Formula in Abidjan, Ivory Coast  [PDF]
Kouadio Yao, Nanga Yessé Zinzendorf, Guichard Bohoua, Kra Athanase Kouassi, Amian Koua, Luc Kouakou Kouadio, Patrice Kouamé, Guillaume Yao Loukou
Food and Nutrition Sciences (FNS) , 2012, DOI: 10.4236/fns.2012.36110
Abstract: To determine the occurrence of Enterobacter sakazakii and other Enerobateriaceae in commercial powdered infant formula (PIF), 185 packages of PIF from different manufacturers, supermarkets and drug-stores in Abidjan were analyzed. Ten g of sample was homogenized in 90 ml of buffered peptone water (PBW, Biorad, Paris) for further studies. Enterobacteriaceae (coliforms) were enumerated according to French Association of Standardization methods. E. sakazakii was detected according to Kandhai’s method. Bacteria were identified using API20 system. Thirty-eight samples (20.5%) were positive for Enterobacteriaceae. Twenty-four samples (13%) yielded Enterobacter sakazakii. Other Enterobacteriaceae isolated included Pantoea spp. 21 (11.5%), Klebsiella pneumoniae subsp. Pneumonia 8 (4.3%), Citrobacter diversus 1 (0.5%), Citrobacter freundii 1 (0.5%), Enterobacter cloacae 1 (0.5%), Salmonella reading 1 (0.5%), Serratia ficara 1 (0.5%) Serratia odorifera 1 (0.5%). This study is the first report to describe the contamination of PIF from Abidjan with E. sakazakii and several other Enterobacteriaceae that could be opportunistic pathogens. Therefore, well-controlled studies need to be conducted to assess the extent of risk associated with contaminated PIF for infants in Abidjan.
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