Abstract
Chemical data are used to clarify the hydrogeological regime in the Merdja area in Tébessa, as well as to determine the status of water quality in this area. Groundwater from the aquifer in the Merdja area can be divided into two major groups according to geographical locations and chemical compositions. Water in the center part of the area of study is characterized by the dominance of chloride, sulfate, sodium, and potassium; whereas waters in the limestone aquifers in the west are dominated by the same cations but have higher concentrations of bicarbonate. Stable isotopes show that the Tébessa aquifers contain a single water type, which originated in a distinct climatic regime. This water type deviates from the Global Meteoric Water Line (MWL), as well as from the Mediterranean meteoric water line. The water is poor in tritium, and thus can be considered generally older than 50 years. Piezometric map suggests that water is moving from the west towards the center of the studied area, and from east towards center. Degradation of water quality can be attributed to agricultural fertilizers in most cases, although the wadi El Kebir River is a contributor to pollution in the middle part of the studied area.
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Acknowledgments
The authors thank the anonymous reviewers for their constructive comments. This work has been realized through the framework of CNPRU project G02920070001. We would like to thank Profs. Bouchaou L. (Morroco) and Zaoui A. (France).
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Rouabhia, A., Fehdi, C., Baali, F. et al. Impact of human activities on quality and geochemistry of groundwater in the Merdja area, Tebessa, Algeria. Environ Geol 56, 1259–1268 (2009). https://doi.org/10.1007/s00254-008-1225-0
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DOI: https://doi.org/10.1007/s00254-008-1225-0