CLIMATE VARIABILITY AND ITS IMPACT ON WATER RESOURCES IN THE CATCHMENT AREA OF WADI FEKAN WILAYA OF MASCARA (WEST ALGERIA)

Ali DAHMANI, Mohamed MEDDI

Résumé


Abstract:
Algeria is one of the arid and semi-arid areas, which suffer from the long drought period.
Strong water shortages, leading to adverse effects on the environment, socioeconomic
development, water resources quality and quantity and increasing land degradation through
erosion and desertification. The study area is part of the basin of the Oued El Hammam (west
of Algeria), the basin lies between latitudes 35.15 ° and 35.50 ° North and between 0 degrees
West longitude and 0.40° degrees East. The interannual variations of rainfall are very
important, with an alternation of wet years and dry years. A wet period between 1943 and
1960 took place. A second period of drought has been installed during the period 1975 to
2004. The records of discharges of the main station (Ain Fekan, 1968-2004), shows a clear
defect. The study area is part of the field Tellien, it on the plain of Ghriss. The relief
surrounding peaks correspond to Jurassic (Sourisseau P, 1973). In structural terms, the plain is
a ditch collapse in Jurassic bedrock and filling Plio-Quaternary. The plain of Ghriss is an
independent hydrogeological identity filed by an overlapping layer of permeable aquifers
separated by impermeable formations that hold and put in charge of these groundwater.

Mots-clés


Rainfall variability; water resources; Fekan river; Algeria.

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