Geography Reference
In-Depth Information
C
ONCLUSION
Integration of different parameters that influence on groundwater storage
is helpful to find out the best place for drillings and thus to reduce the rates of
unsuccessful wells. The resulting map shows that 5% of the study area
presents Very high groundwater potential storage that is mainly concentrated
in the south part of the study area and on the MTZ, very low potential
constitutes 13% of the area is located essentially in the north part of the study
area and particularly on granites. Combination of results generated by the GIS
with NDVI and wells productivities shows that, generally good aquifer
potentials are well correlated with high vegetal activities in advanced dry
season except in areas affected by forest fires which are frequent in the region.
High borehole productivities are observed in zone presenting high
groundwater potential resulting from GIS application and very low borehole
productivities are observed in the north part of the study area corresponding to
the low and very low groundwater potential. These important results can be an
efficient indicator that helps decision makers to better manage their drilling
projects and minimize the high rates of failed boreholes. Therefore, use of RS
and GIS contributes to improve Knowledge of groundwater resources
investigation in context of hard rock aquifers of south-eastern of Senegal and
can be used as an efficient tool for assessing groundwater potential at large
scale.
A
CKNOWLEDGEMENTS
I wish to thank sincerely Mr Ousmane Bocoum for his kind support in
Image processing and the whole staff of the hydrogeology group from Ucad.
R
EFERENCES
Bassot J.P. 1966. Etude géologique du Sénégal oriental et de ces confins
Guinéo-maliens.
Mem. Bur. Rech. Géol. Min.,
Paris, 40, 322p.
Biémi J. 1992.
Contribution à l'étude géologique, hydrogéologique et par
télédétection des bassins
versants sub-sahéliens du socle précambrien
d'Afrique de l'Ouest : Hydrostructurale, hydrodynamique, hydrochimie et
