A MULTICRITERIA APPROACH TO STUDY GENESIS OF SALTED GROUNDWATER, NORTHERN JEFFARA (SOUTH-EASTERN TUNISIA)

M. BEN ALAYA, R. KHOUNI, T. ZEMNI, S. KHMERI, F. ZARGOUNI

Abstract


A multi-disciplinary study comprising boreholes, geophysical and geochemical analyses are used tooutline aconceptualhydrogeochemicalmodel of northern Jeffara groundwater, largely influenced by tectonic. The study of subsurface datademonstratedthat the passageof Saharianstable platform toAtlasdomain is marked by fracturation affecting several geological formations nearsebkhas. Indeed, contaminationof groundwater is probably resulting from rise of deepsalt waterthrough tectonicdisharmonyand saltwater intrusion from the sebkhas by means of fractured carbonate formation. Moreover, the groundwaters quality is characterized by geochemical interactions: cationic exchange and the precipitation/dissolution process of minerals in the aquifer formations.


Keywords


multi-layered aquifer; tectonic; hydrochemistry; south-eastern Tunisia

Full Text:

PDF (Français)

References


ANDREWS, J.N., FONTES, J.C., ARANYOSSY, J.F., DODO, A., EDMUNDS, W.M., JOSEPH, A., TRAVI, Y. (1994). The evolution of alkaline aquifer of the Irhazer Plain, Niger. Water Resour Res 30(1): 45–61

BEN ALAYA, M., ZEMNI, T., MAMOU, A. & ZARGOUNI, F. (2014): Acquisition de salinité et qualité des eaux d’une nappe profonde, Tunisie: Approche statistique et géochimique. Hydrological Sciences Journal. 59 (2), 395-419.

BEN ALAYA, M., SAIDI, S., ZEMNI, T. & ZARGOUNI, F. (2013b). Suitability assessment of deep groundwater for drinking and irrigation use in the Djeffara aquifers (Northern Gabes, south-eastern Tunisia). Environ Earth Sci. 71, 3387–3421.

BOUAZIZ, S. (1995). Étude de la tectonique cassante dans la plateforme et l’Atlas sahariens (Tunisie méridionale): évolution des paléochamps de contraintes et implications géodynamiques. Thèse Es Sciences. Université Tunis-II, Tunisie.

CASTANY, G. (1954). L’accident sud tunisien et ses relations avec l’accident sud-atlasique. Comptes Rendus de l’Académie des sciences, Paris, 238.

CIDU, R., BIDDAU, R., AND ET FANFANI, L. (2009). Impact of past mining activity on the quality of groundwater in SW Sardinia (Italy). Journal of Geochemical Exploration, 100, 125–132.

LARROQUE, F.& DUPUY, A. (2004). Apports de la méthode sismique réflexion haute résolution à l’identification des structures profondes des formations tertiaires en Médoc (Gironde, France): implications hydrogéologiques. C.R.G. 336, 1111–1120.

MAMOU, A. (1990). Caractéristiques et évolution des ressources en eau du Sud Tunisien.

PIPER, A. M. (1944). A graphic procedure in the geochemical interpretation of water analyses. Trans. Am. Geophys. Union 25, 914–923.

PLUMMER, L.N., JONES, B.F., and et TRUESDELL, A.H. (1976). WATEQF, a Fortan IV version of WATEQ, a computer program for calculating chemical equilibrium of natural waters. US Geological Survey Water Resources Investigation Report 76–13. Available from: http://pbadupws.nrc.gov/docs/ML0331/ML033170395. pdf

SUBYANI, A.M. (2005). Hydrochemical identification and salinity problem of ground-water in Wadi Yalamlam basin, Western Saudi Arabia. Journal of Arid Environments, 60, 53–66.

ZOUHRI, L., GORINI, C., LAMOUROUX, C., VACHARD, D., DAKKI, M. (2003): Interprétation hydrogéologique de l’aquifère des bassins Sud rifains (Maroc): apport de la sismique réflexion. C. R. G. 335, 319–326.


Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.