Analyse de la qualité physico-chimique des eaux souterraines de la communauté des Mzamza, au voisinage des eaux usées

Abstract

Analyze of the physicochemical quality of Mzamza’s community
of ground waters, around waste waters In the Mzamza’s community, characterized by an important agricultural potentiality especially in the perimeters irrigated by domestic and industrial water, ground waters are prone to several possibilities of contamination. However in this zone, the ground waters are considered as an important resource used to drink water and irrigation. The objective of this study is, on the one hand, to try to evaluate the impact of the wastes water’s re-use on the physicochemical quality of wells’water in the zone of study and, on the other hand, to determine its quality refering to the standards of potability or irrigation. The results obtained showed that the concentrations of the elements considered (principal pollutants and indicators of pollution) are high in waste waters and ground waters.
The ratio of adsorption of sodium (SAR) enabled us to qualifie ground
waters intended to the irrigation, and the causes of salinisation of the soil when using it in this domain.Several determining factors were highlighted in the contamination of ground waters by these pollutants, namely: the contribution of nitrogenized fertilizers, the nature of soil, the lithology, the permeability of the aquifer and the outdistances well compared to the sources of pollution which are waste waters.