Characterization of Aquifers in Crystalline and Crystallophyll Basement Zones Using the Electrical Resistivity Method (Trails and Electrical Soundings) in the Gagnoa Region, (Central-Western Côte d’Ivoire)
- 1 Department of Geosciences, Peleforo Gon Coulibaly University, Korhogo, Côte d’Ivoire
- 2 Department of Geosciences, Peleforo Gon Coulibaly University, Korhogo, Côte d’Ivoire
- 3 Department of Agriculture and New Technologies, University of San Pedro, San Pedro, Côte d’Ivoire
- 4 Department of Geosciences, Peleforo Gon Coulibaly University, Korhogo, Côte d’Ivoire
Abstract
Introduction : Located in the central-western part of Côte d’Ivoire, the subsoil of the Gagnoa region is made up of sedimentary volcano formations and granitoids with developed fracturing. This complex Precambrian basement contains most of the region’s water resources. This is at the origin of the high failure rate during the various hydrogeological prospecting campaigns. M e thodology : The database consists of resistivities from 42 holes and 51 trails drilled as part of the implementation of high-throughput drilling in the study area. The objective of this study is to deepen the knowledge of the fissured basement by interpreting profile curves and electrical soundings. It will be a question of classifying the different types of anomalies obtained on the profiles and their shapes. The orientation of the lineaments observed on the profiles was determined. Results : The interpretation of the geophysical data revealed various anomalies, the main ones being of the CC (Conductor Compartment) and CEDP (Contact between two bearings) types. These types of anomalies are mainly expressed in various forms: the “V”, “W” and “U” shapes. From these anomalies and the appearance of the electrical profiles, lineaments and their orientations were identified with N90-100, N130-140, N170-180 as major orientations. Conclusion : These results could contribute to a better understanding of the fractured environment of the Gagnoa region.
- Biemi, J. (1992) Contribution to the Geological, Hydrogeological, and Remote Sensing Study of the Sub-Sahelian Watersheds of the Precambrian Basement of West Africa: Hydrostructural, Hydrodynamic, Hydrochemistry and Isotopy of the Discontinuous Aquifers of Furrows and Granitic Areas of the Upper Marahoué (Côte d’Ivoire). Doctoral Thesis, University of Abidjan.
- Kouame, F. (1999) Hydrogeology of Discontinuous Aquifers in the Semi-Mountainous Region of Man-Danané (Western Côte d’Ivoire) Contribution of Satellite Image Data and Statistical and Fractal Methods to the Development of a Spatially Referenced Hydrogeological Information System. 3rd Cycle thesis, University of Cocody.
- Lasm, T. (2000) Hydrogeology of Fractured Basement Reservoirs: Statistical Analysis of Fracturing and Hydrodynamic Properties. Application to the Region of the Mountains of Côte d’Ivoire (Archean Domain). Unique Doctoral Thesis, University of Poitiers.
- Baka, D. (2012) Geometry, Hydrodynamics, and Modelling of Fractured Reservoirs of the Proterozoic Basement of the Oumé Region (Centre-West Côte d’Ivoire), Doctoral Thesis, University Félix Houphouët-Boigny.
- Kouadio, A. (2021) Productivity of Water Boreholes by the Method of Electrical Resistivity in the Middle of the Basement (N’zi Comoé zone; Côte d’Ivoire) Single Doctoral Thesis, Nangui Abogoa University.
- Dabas, M., Duval, O., Bruand, A. and Verbeque, B. (1995) Continuous Electrical Mapping: Contribution to the Knowledge of a Soil Cover Developed on Deltaic Materials. Étude et Gestion des Sols , 2, 257-268.
- Papon, A. and Lemarchand, R. (1973) Geology and Mineralization of the SouthWest of Côte d’Ivoire. Summary of the Work of the SASCA Operation (1962-1968), SODEMI Abidjan, 284.
- Jourda, J.P. (2005) Methodology for the Application of Remote Sensing Techniques and Geographic Information Systems to the Study of Fissured Aquifers in West Africa. Concept of Space Hydrotechnics: The Case of the Test Areas of Côte d’Ivoire. Doctoral Thesis in Natural Sciences, University of Cocody-Abidjan.
- Coulibaly, A. (2014) Contribution of the Electrical Resistivity Method (Trails and Electric Soundings) to the Localization of Aquifers in Crystalline and Crystallophyllian Basement Zones: The Case of the Tanda Region, (North-East of Côte d’Ivoire), Doctoral Thesis, Félix University Houphouët-Boigny.
- Onetie, Z. (2016) Contribution of GIS and Multicriteria Analysis to the Hydrogeological Prospecting of the Precambrian Basement of West Africa (The Case of the Gagnoa Region in the Centre-West of Côte d’Ivoire), Doctoral Thesis, Université Félix Houphouët-Boigny.