Numerical groundwater flow modeling for managing the Gabes Jeffara aquifer system (Tunisia) in relation with oasis ecosystems Jean-François Vernoux, Faten Horriche, R Ghoudi To cite this version: Jean-François Vernoux, Faten Horriche, R Ghoudi. Numerical groundwater flow modeling for man- aging the Gabes Jeffara aquifer system (Tunisia) in relation with oasis ecosystems. Hydrogeology Journal, Springer Verlag, 2020. hal-02509375 HAL Id: hal-02509375 https://hal-brgm.archives-ouvertes.fr/hal-02509375 Submitted on 17 Mar 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. 1 Numerical groundwater flow modeling for managing the Gabes Jeffara aquifer system 2 (Tunisia) in relation with oasis ecosystems 3 J.F. Vernoux1, F. Jarraya Horriche2, R. Ghoudi3 4 1 BRGM, F-45060 Orléans, France,
[email protected] 5 2 Carthage University, CERTE, Laboratory of Georesources, - BP 273-8020 Soliman, Tunisia, 6
[email protected] 7 3 CRDA – 6019 Gabes, Tunisia,
[email protected] 8 Abstract 9 The Gabes Jeffara aquifer system, in southeastern Tunisia, is essentially recharged by rainfall infiltration 10 and by groundwater inflow from the Intercalary Continental aquifer in the northwest. The increase in 11 groundwater pumping for irrigation in recent decades has induced a serious decrease in groundwater levels, 12 depletion of springs and degradation of oasis ecosystems.