Volume 19, Issue 1, January 2017, Pages 226–238
Mohamed HAMDI1, Jamila TARHOUNI2, Mohamed Faouzi Zagrarni3, Ghassen LAAOUINI4, and Hans Werner Müller5
1 Department of Geology, Faculty of Sciences of Bizerte, Tunis, Tunisia
2 Rural Engineering Department, National Agronomic Institute of Tunisia, Tunis, Tunisia
3 U. R. Applied Hydrosciences UR 13 ES 81, Higher Institute of Water Sciences and Techniques, University of Gabes, Cité Erryadh, 6072 Gabes, Tunisia
4 The Tunisian Company of Petroleum Activities, Tunis, Tunisia
5 Federal Institute for Geosciences and Natural Resources, Hannover, Germany
Original language: English
Copyright © 2017 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Sisseb El Alem-Nadhour Saouaf (SANS) basin, is located in the Northeastern Tunisia, where groundwater systems are often exposed to rapidly reserve overexploitation, changing recharge amounts and quality degradation. A three-dimensional (3D) regional hydrogeological model of SANS basin was developed in order to understand the geometry of subsurface and its implications on groundwater dynamics. The 3D model was built by the interpretation of 2D seismic reflection profiles, calibrated by wire line logging data of oil wells, hydraulic wells and geologic field sections. After checking efficiency of interpolation methods by geostatistical tools, validated model highlighted the impact of faults system on the aquifer geometry and structure. Thus, Plioquaternairy and Oligo-Miocene aquifers in the study area represent important geometric variations and cumulated thickness affected by intensive fractures which divided the system into 4 sub-basins (Bled Ktifa, Sisseb, El Alem and Nadhour Saouaf). Moreover, vertically, geological modeling shows 11 hydrogeological layers, with different hydrodynamic characteristics. This study was benefic to propose a conceptual model for the SANS system and to identify the recharge zones and the over-pumped areas which are affected by a significant evaporation rates and reveal large fluctuations of flow dynamic. These results suggest the critical importance of building a various GIS database and testing numerical geological models on groundwater flow dynamic assessment.
Author Keywords: SANS basin, 3D geological model, geophysics, groundwater flow, Conceptual Model.
Mohamed HAMDI1, Jamila TARHOUNI2, Mohamed Faouzi Zagrarni3, Ghassen LAAOUINI4, and Hans Werner Müller5
1 Department of Geology, Faculty of Sciences of Bizerte, Tunis, Tunisia
2 Rural Engineering Department, National Agronomic Institute of Tunisia, Tunis, Tunisia
3 U. R. Applied Hydrosciences UR 13 ES 81, Higher Institute of Water Sciences and Techniques, University of Gabes, Cité Erryadh, 6072 Gabes, Tunisia
4 The Tunisian Company of Petroleum Activities, Tunis, Tunisia
5 Federal Institute for Geosciences and Natural Resources, Hannover, Germany
Original language: English
Copyright © 2017 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Sisseb El Alem-Nadhour Saouaf (SANS) basin, is located in the Northeastern Tunisia, where groundwater systems are often exposed to rapidly reserve overexploitation, changing recharge amounts and quality degradation. A three-dimensional (3D) regional hydrogeological model of SANS basin was developed in order to understand the geometry of subsurface and its implications on groundwater dynamics. The 3D model was built by the interpretation of 2D seismic reflection profiles, calibrated by wire line logging data of oil wells, hydraulic wells and geologic field sections. After checking efficiency of interpolation methods by geostatistical tools, validated model highlighted the impact of faults system on the aquifer geometry and structure. Thus, Plioquaternairy and Oligo-Miocene aquifers in the study area represent important geometric variations and cumulated thickness affected by intensive fractures which divided the system into 4 sub-basins (Bled Ktifa, Sisseb, El Alem and Nadhour Saouaf). Moreover, vertically, geological modeling shows 11 hydrogeological layers, with different hydrodynamic characteristics. This study was benefic to propose a conceptual model for the SANS system and to identify the recharge zones and the over-pumped areas which are affected by a significant evaporation rates and reveal large fluctuations of flow dynamic. These results suggest the critical importance of building a various GIS database and testing numerical geological models on groundwater flow dynamic assessment.
Author Keywords: SANS basin, 3D geological model, geophysics, groundwater flow, Conceptual Model.
How to Cite this Article
Mohamed HAMDI, Jamila TARHOUNI, Mohamed Faouzi Zagrarni, Ghassen LAAOUINI, and Hans Werner Müller, “Assessment of groundwater flow dynamic using GIS tools and 3D geological modeling: Case of Sisseb El Alem-Nadhour Saouaf basin, Northeastern Tunisia,” International Journal of Innovation and Applied Studies, vol. 19, no. 1, pp. 226–238, January 2017.
