Vulnérabilité et risque de pollution des eaux souterraines de la plaine de F'kirina nord est Algérie

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Abbes Laghrour University- Khenchela
Groundwater is one of the main sources of drinking water for the population and irrigates crops in the F'kirina region (south-east of Oum el Bouaghi) which cover an area of 650 km2, This study has led to progress in the state of hydrogeological knowledge of the aquifer, assess their condition assignment by pollution and more generally to assess the degree of vulnerability of groundwater to urban pollution. After an exhaustive study of the physical part of the study area reflecting the hydrogeological context of the aquifer system studied. The hadrochemical study of the waters of the aquifer was based on the interpretation of the results of analyzes carried out on 45 water samples taken at different water points during a sampling campaign carried out in May 2015. which defines three facies, Ca-HCO 3 water types in carbonate outcrops as Ca-SO 4 and Cl-Ca type in the PlioQuaternary filling in the direction of the Sabkha. The statistical study of the various parameters analyzed, their spatial distribution and the main facies provided information on the origin and evolution of mineralization. A final part was devoted to establishing a mapping of the vulnerability of groundwater to pollution through the implementation of the GOD and DRASTIC method which shows that the water table of the F'kirina region has a low to moderate vulnerability. The coupling between the geological, physicochemical and statistical tools in the study of the groundwater quality of the F'kirina plain, allowed us to determine the origin of the mineralization and its mode of acquisition as well as its distribution in space.