CARACTERISATION HYDROGEOCHIMIQUE ET MICROBIOLOGIQUE DES EAUX SOUTERRAINES DANS LE SYSTEME D’AQUIFERES MULTI COUCHE DE LA REGION DE POINTE-NOIRE EN REPUBLIQUE DU CONGO
Journal Title: Larhyss Journal - Year 2016, Vol 28, Issue 28
Abstract
To evaluate the groundwater of Pointe-Noire for human use, it was necessary to determinate the various parameters influencing the quality of water of the coastal sedimentary basin. Their physicochemical elements were followed during all the hydrological cycle of the year 2015 in 16 piezometers (drillings and well). The results of the chemical analyses were treated by hydrochimic and statistical methods. Spatial of the elements shows the same evolutionary pace as that observed for chloride, sodium, sulphates, magnesium and calcium. This reveals that water of drillings and the wells of Point-Black is characterized by low contents dissolved salts. This would be explained by the importance of the surface food. The Analysis in Principal Components and Ascending Hierarchical Classification indicate that the mineralisation of this water is controlled by three great phenomena: the mineralisation which results in the hydrolysis of minerals silicated for groundwaters, the pluviolessivage of the grounds for surface water and, of the human activities in the production of polluting waste. This study also shows that water of Point-Black is contaminated by total germs, fecal coliformes and totals which are the consequence of a recent anthropic pollution.
Authors and Affiliations
MBILOU U. G. | Département de Géologie, Faculté des Sciences et Techniques, Université Marien Ngouabi. BP : 69 Brazzaville – République du Congo, TCHOUMOU M. | Département de Chimie, Faculté des Sciences et Techniques, Université Marien Ngouabi. BP : 69 Brazzaville – République du Congo, NGOUALA M. M| Département de Géographie, Faculté des Lettres et des Sciences Humaines, Université Marien Ngouabi. BP : 69Brazzaville - République du Congo, BALOUNGUIDI, J. | Département de Géologie, Faculté des Sciences et Techniques, Université Marien Ngouabi. BP : 69 Brazzaville – République du Congo
Keywords
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