Contribution de la prospection électrique à l'étude hydrogéologique des aquifères dans les plaines de Mech et de Sned sud (Tunisie centrale)

Electric prospection contribution to the hydrogeological study of groundwater in the Mech and South Sned plain groundwater (Central Tunisia)

¹ Faculté des Sciences de Bizerte, Tunisie
² Université P. & M. Curie, Paris 6
³ Université de Sfax pour le Sud, Tunisie
⁴ Direction Générale des Ressources en Eau, Tunisie

Abstract

The authors aim to study geological formations that may satisfy needs in drinking water for rural agglomeration in the Mech plain and south Sned plain in the South of Central Tunisia. The geophysics coupled to structural and stratigraphical analysis shows that the superficial water tables are located in the heteregenous covering Mio-Plio-Quaternary. The deep water tables are located in carbonates terms of upper Cretacious (Zebbag). The structural frame of Mech plain consists of a north flanc of E-W Bouhedma anticline borded in the East by NW-SE Mech Fault. The structural frame of south Sned plain consists of a major collapse borded by E-W faults passage way exhibiting transversal faults thus isolating minor breaking down tilted bloks. The faults trace are followed by rivers overbooks among which that of Oued Drag. Favorable areas for superficial and deep water tables exploitation by drilling hole in the two plains are delimited.