@article{PAR00009518, title = {{T}omographic, hydrochemical and isotopic investigations of the salinization processes in the oasis shallow aquifers, {N}efzaoua region, southwestern {T}unisia}, author = {{K}raiem, {Z}. and {C}hkir, {N}. and {Z}ouari, {K}. and {P}arisot, {J}ean-{C}laude and {A}goun, {A}. and {H}ermitte, {D}.}, editor = {}, language = {{ENG}}, abstract = {{A}n electrical imaging tomography survey was carried out to identify the lateral and vertical salinity distribution in the oasis shallow aquifers of the {N}efzaoua region located in southwestern {T}unisia. {I}n addition, hydrochemical and isotopic data were examined to determine the main factors and mechanisms controlling the groundwater chemistry and salinity. {L}ocally, with respect to salinization processes, electrical imaging tomography results show that the storage basins of irrigation excess-water contribute to the increase of the salinity for the major part of the oasis nearby these basins. {M}ajor elements distribution and saturation indices indicate that dissolution of evaporites (halite, anhydrite and gypsum) is the main process controlling the groundwater mineralization. {I}sotopic data highlighted the effect of evaporation in the salinization of these waters. {T}he correlation between the oxygen 18 and the chlorides data confirms the importance of evaporation effect and dissolution as main processes controlling the groundwater mineralization.}, keywords = {{T}omography ; drainage ; dissolution ; evaporation ; oasis ; salinization}, booktitle = {}, journal = {{J}ournal of {E}arth {S}ystem {S}cience}, volume = {121}, numero = {5}, pages = {1185--1200}, ISSN = {0253-4126}, year = {2012}, URL = {https://www.documentation.ird.fr/hor/{PAR}00009518}, }