The superficial aquifer of Ain Djacer is in the alluvial deposits of the Mio-Plio-Quaternary clays whose substratum of marl and gypsums. The plain of Ain Djacer is shaped like a bowl due to the presence of a syncline which all convergent flow toward the center. The underground waters have features a lot done more chlorinate sodique in liaison with the geology. The presence of the sorted saline would be in favor of this hydrochemical typology. The different correlations show that the salinity is a lot more controlled by the chlorides, the sulfates and sodium. The Hierarchic Rising Classification watch that it exists three groups of water of which the salinity increases with the flow direction with the group 1> group 2> group 3. These high contents can interpret themselves by the intensification of the basic exchange; the Liaison water rock dominated by the presence sorted it saline. The Hierarchic Rising Classification clearly indicates that the responsible parameters of the variation of the quality of underground waters principally are linked to the presence and the dissolution of certain evaporates minerals. The results of this study clearly show the usefulness of the analysis statistics in the hydrochemical study.

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