Cartographie de la salinité des eaux souterraines de la région Sud Bassin Garaet El Taref (Khenchla)
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Date
2018-06-20
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Université Abbes Laghrour -Khenchela-
Abstract
Abstract
This work aims to map the salinity of groundwater in the southern region of Garaet El Taref
and to determine the origin of strong mineralization (EC between 1300 and 2060 μs / cm).
The waters of the analyzed samples have three hydrochemical facies: chlorinated and
sulphated calcium and magnesium, sodium chloride and potassium or sulphated sodium. The
calcic and magnesium Bicarbonate facies are found in the south-eastern part of the watershed
where there are formations rich in bicarbonate (Upper Cretaceous limestone). The magnesium
content comes from the dolomitic limestones of the Triassic. The contamination of
groundwater by nitrates is of urban and agricultural origin very likely given the context of the
zone. A geographic information system was used to develop the maps of the isovalues of
the concentrations of the chemical elements and indicates the variation of the spatial
distribution of these elements. The samples with high mineralization are relative to the places
close to Garaet and to the sites of anthropogenic activities.