Origin of the salinity in the groundwater of the El Attaf alluvial aquifer

The choice of this research theme was guided by the desire to better understand environmental issues, namely salinity and its origin, through the use of geophysical data from various surveys carried out between 1969 (CGG) and 2002 (IFES), to highlight the impact of the geological and structural upheavals that occurred during the earthquake of October 10, 1980, on the hydrodynamic processes. The interpretation of the resistivity data revealed that water salinity is highly variable and generally high near Jebel Témoulga. Chemical analyzes of all wells in the region confirm this. The hydrochemical study has shown the influence of local geology on the chemistry of the waters of the neighboring aquifer, and raises the question of the importance of gypso-saliferous facies in the region of El Attaf. The multifunctional statistical analysis revealed two chemical profiles within the same aquifer, but it should be noted that the highest concentrations were recorded on the Hay Bel Abbes - Bir Saf Saf axis.