“…This vast aquifer is extensively used both for agricultural purposes and for the supply of drinking water (Leduc et al, ; Massuel et al, ). In this region, where the climate is semi‐arid, the mean annual rainfall is less than 300 mm/year, and the potential evapotranspiration is high, reaching approximately 1,700 mm/year during the summer (Massuel et al, ; Nazoumou & Besbes, ; Zribi, Paris Anguela, Duchemin, & Lili, ). This climate, combined with the intense and widespread use of the aquifer, is leading to a steady decrease in piezometric levels, at a rate of approximately 1,000 mm/year for the last 30 years (Leduc et al, ; Massuel & Riaux, ).…”