Hydrochemical And Microbiological Study of Urban River Waters In The Agglomeration of Brazzaville (Republic of Congo)

International Journal of Agriculture & Environmental Science

© 2021 by SSRG - IJAES Journal

Volume 8 Issue 4

Year of Publication : 2021

Authors : M. Ngouala Mabonzo

10.14445/23942568/IJAES-V8I4P104

How to Cite?

M. Ngouala Mabonzo, "Hydrochemical And Microbiological Study of Urban River Waters In The Agglomeration of Brazzaville (Republic of Congo)," SSRG International Journal of Agriculture & Environmental Science, vol. 8,  no. 4, pp. 29-36, 2021. Crossref, https://doi.org/10.14445/23942568/IJAES-V8I4P104

Abstract:

To study the waters of the urban rivers of Brazzaville in the Republic of Congo for environmental needs, it was necessary to determine the various parameters influencing the quality of the water in these urban rivers. Their physicochemical elements were monitored throughout the hydrological cycle of 2020 in all of these rivers. The results of the chemical analyzes were processed by hydrochemical and statistical methods. The spatial distribution of the elements shows the same evolutionary pace as that observed for anions and cations. It appears that the waters of these rivers are characterized by low contents of dissolved salts. This could be explained by the importance of surface feeding. The Principal Component Analysis and the Ascending Hierarchical Classification indicate that the mineralization of these waters is controlled by two major phenomena: mineralization which results in the pluvi-leaching of soils for surface water and, anthropogenic activities in the production of waste pollutants. This study also shows that the waters of these rivers are contaminated by total germs, fecal and total coliforms which are the consequence of recent anthropogenic pollution.

Keywords:

Congo, Brazzaville, urban rivers Principal Component Analysis, Ascending Hierarchical Classification.

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