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New Geological and Hydrogeological Information on the Eastern Border of the Gondo Plain （Burkina Faso）

Journal of Environmental Science and Engineering(B) 2015年第12期4卷 649-656页

作者： youssouf koussoube Samuel Nakolendousse Pierre Ribstein Roger Guerin Suzanne Yameogo Alain Nindaoua Savadogo Department of Earth Sciences University of Ouagadougou Ouagadougou 09-848 Burkina Faso UMR Metis Sorbonne Universities Paris 75052 France

The Gondo plain lies between Mali and Burkina Faso and it is in interland basin into the West African Craton. Since 2003, this study has been carried out two research projects on the southwest part of the plain, where the piezometric levels are very low （50 m to 100 m）. It has two main purposes： find water resources to provide drinking water supply to Ouahigouya town and assess the exploitation possibility of the deep aquifer for rural water supply. Combined methods were used to reach the objectives of this study--remote sensing, geology, geophysics （electromagnetism and resistivity methods）, hydrochemistry and isotope chemistry. So, the methodology allows to specify the geology and the tectonic of the eastern border of the basin, identify and characterize the different aquifers and their relationships. Through the implementation of 250 m deep drilled boreholes, this study reveals that the water level of the lower Cambrian limestones can be under pressure below the continental terminal deposits. The study highlights paleo-karstic zones in the Gondo plain and shows that water chemistry and isotope chemistry can be used to differentiate water sheets and evaluate their recharge.

关键词： Gondo plain aquifers geophysics trial water drilling isotopic chemistry piezometric.

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Groundwater Flow Modeling by Using the Permeability Induced by Satellite Lineaments in Discontinuous Aquifers and Semi-Arid Context: A Case Study of the Liptako Region (South-West of Niger)

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Journal of Water Resource and Protection 2019年第8期11卷 1090-1109页

作者： Saidou Garba Inaytoulaye youssouf koussoube Abdel Kader Hassane Saley Issoufou Sandao Paul Hayes Boureima Ousmane Department of Geology Faculty of Science and Technology Abdou Moumouni University Niamey Niger Department of Earth Sciences Life and Earth Sciences Unit Joseph Ki-Zerbo University Ouagadougou Burkina Faso International Aid Service of Niamey Niger

The study area, located in the Liptako basement of Niger, faces a serious problem of drinking water supply in recent decades. This is linked to exponential population growth and reduced rainfall. The purpose of this study is to map fracture networks from Landsat 7 satellite imagery to identify major subterranean flow corridors in the area. The methodological approach based on the collection of data (Landsat 7 images, DEM/SRTM, flow, transmissivity, static level) and the geological and hydrogeological field reconnaissance and the processing of these data with the following software (ArcGis, Envi, Surfer and RStudio) The results of this study yielded that the number of satellite lineaments is 995, the preferred directions of these satellite lineament are: N0°-10° (13%) and N90°-100° (12%). On the hydrographic network, in situ, the most frequent fracture, vein and dike directions are: N90°-100° (12%), N130°-150° (11%), and N50°-60° (10%). The structural domains identified probably correspond to the main corridors and reservoirs of underground flows. The values of the induced permeability are between 0.05 × 10-8 and 3.4 × 10-7 m/s. The permeability induced by satellite lineaments, which is strongly related to high fracturing densities and major water stream is involved in the hydrodynamic functioning of discontinuous aquifers in the study area.

关键词： Satellite Image Circulation Corridor Induced Permeability Hydrogeological Modeling Tamou

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