Geography Reference
In-Depth Information
Chapter 10
U SE OF R EMOTE S ENSING AND GIS FOR
G ROUNDWATER P OTENTIAL M APPING IN
C RYSTALLINE B ASEMENT R OCK
(S ABODALA M INING R EGION , S ENEGAL )
I. Mall * , M. Diaw, H. D. Madioune, P. M. Ngom
and S. Faye
Department of Geology/Faculty of Sciences and Technology/UCAD
Dakar, Senegal
A BSTRACT
Detection of favorable zones for sustainable groundwater supply in
terrains underlying by crystalline rocks needs to integrate two
approaches: Remote Sensing and GIS. Landsat ETM+ images are
processed by using ERDAS IMAGINE 9.2 and ASTER images by
ArcGIS 9.3. Parameters controlling groundwater accumulation such as:
rainfall, lineaments, lithology, slopes, and drainage network are evaluated
in terms of 5 potential classes namely: very good potentials, good;
moderate; low and very low potential and integrated in the GIS tool. The
resulting map shows that 5% of the study area presents a very good
groundwater potential and this part is mainly concentrated in the south
part of the study area and on the MTZ, very low potentials constitute 13%
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