Etude De La Salinité Et Détermination De La Contamination de La Nappe De La Sebkha D’El Mahmel
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Date
2019
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Université Abbes Laghrour -Khenchela-
Abstract
Abstract :
Sebkhas, are natural ecosystems, these systems are used as indicators of the geochemical evolution. Sebkhas
are little depressions, contain some salt water during long periods, these sebkhas do not drained off only
during heat waves in summer, some of them may even wet all the year, among the main sebkhas of the
valley of khenchela city is called Mahmel,it is located in the southern steppe of the wilaya, in the constantine
high plains. This present work aimed to characterize the physicochemical quality of the groundwater, the
purpose of which is to identify the chemical facies of these waters, and their qualities, and to define the
degree of saline contamination of the waters at the sebkha level, Physico-chemical analyzes are
(temperature, pH, turbidity, conductivity, salinity) measured in situ and in the laboratory and determination
of major components (Cl- , SO4 --, HCO3 - , NO3 - ,NO2- , Ca++, Mg++, Na+ , K+, NH4+) made in the
laboratory of the ADE and laboratory of the abbas laghrour khenchela Uiversity .for a chemical
characterization of the aquifer system.The Setting up of these facies is mainly connected to the intensive use
of artificial fertilizers to improve the yield, and to the presence of carbonate formations of Jebel Chattaia and
salt deposits due to the presence of trias and carbonate and gypsiferous formations of the massifs
surrounding the plain.