TITLE:
Application of a Multi-Criteria Approach for the Assessment of Groundwater Potential in the Basement Zone: A Case of Tamou (South West Niger)
AUTHORS:
Saidou Garba Inaytoulaye, Abdel Kader Hassane Saley, Issoufou Sandao, Issa Garba
KEYWORDS:
Multi-Criteria Analysis, Remote Sensing, GIS, Discontinuous Aquifers, Tamou, Niger
JOURNAL NAME:
International Journal of Geosciences,
Vol.14 No.1,
January
31,
2023
ABSTRACT: The commune of Tamou, located in the Department of Say in Niger, occupies
the southwestern part of the Liptako crystallophyllian basement domain. In this area, the problem of the drinking water supply of the populations is acute, because of the low flow rates of the drillings capturing the
crystallophyllian formations and the Voltaian sandstones, the failure rates of the drillings are
very high there. Therefore, the main objective of this study is to improve the
knowledge of the areas potentially favorable for the implantation of drillings likely to give more satisfactory flow rates. The
methodological approach, based on the collection of data (Landsat 7 ETM+
satellite imagery, borehole data, geological and topographical maps) and their
processing by a combination of remote sensing
and GIS tools and a field check, allowed the elaboration of maps of availability, accessibility and
exploitability of the groundwater resources in the study area. The maps
developed were analyzed with a Spatial Reference Hydrogeological Information
System following the technique of aggregation by
weighting to generate the map of productive drilling sites. The results show
that the area is moderately rich in groundwater (58%) and that only 31%
of the potential is exploitable. The
groundwater potential map shows that 46% of the study area is suitable
for drilling.