Hydro-Geochemical Processes in the Complexe Terminal
Journal of African Earth Sciences 100 (2014) 81–95 Contents lists available at ScienceDirect Journal of African Earth Sciences journal homepage: www.elsevier.com/locate/jafrearsci Hydro-geochemical processes in the Complexe Terminal aquifer of southern Tunisia: An integrated investigation based on geochemical and multivariate statistical methods ⇑ Friha Hadj Ammar a,c,1, , Najiba Chkir a,b,2, Kamel Zouari a,2, Bruno Hamelin c,3, Pierre Deschamps c,3, Aissa Aigoun d,4 a Laboratory of Radio-Analysis and Environment, National School of Engineering of Sfax, Route de Soukra, BP 1173, 3038 Sfax, Tunisia b Laboratory of Radio-Analysis and Environment, Faculty of Letters and Humanities, Geography Department, Route El Matar, BP 1168, 3029 Sfax, Tunisia c CEREGE, UMR Aix-Marseille Université, CNRS, IRD, Collège de France, Europôle de l’Arbois, BP 80, 13545 Aix en Provence cedex 04, France d Commissariat Régional de développement Agricole Kébili, Rue Salah Ben Youssef 4200 Kébili, Tunisia article info abstract Article history: Hydrochemical data from a total of 104 groundwater samples were used to investigate the main factors Received 30 November 2013 and mechanisms that control the chemistry of groundwaters in the Complexe Terminal (CT) aquifer of Received in revised form 20 June 2014 Chott region in southern Tunisia. Multivariate statistical techniques combining Hierarchical Cluster Anal- Accepted 21 June 2014 ysis (HCA) and Principal Component Analysis (PCA) were applied to the dataset of 12 physicochemical Available online 28 June 2014 + + 2+ 2+ À À À 2À parameters (i.e. pH, T°, depth, Na ,K,Ca ,Mg , HCO3 ,NO3 ,Cl ,SO4 , and TDS).
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