TITLE:
Chemical Evolution of Groundwater in the Dindefello Plain Area in South-Eastern Senegal
AUTHORS:
Seybatou Diop, Moshood N. Tijani
KEYWORDS:
Senegal, Dindefello, Groundwater, Mineralization, Springwater, Geochemical Modeling
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.6 No.19,
December
30,
2014
ABSTRACT: This
study was to clarify the main mechanisms of shallow groundwater mineralization
in the Dindefello Plain Area. Water composition data obtained in this study
were subjected to aqueous speciation calculations together with data plotting
on key diagrams so as to create work assumptions. Hypothesized reaction models
of the processes of chemical weathering of carbonates and silicate minerals
under the carbon dioxide regime were proposed and tested by selecting two water
sample analyses interpreted as “starting” and “ending” water composition along
a hydrologic flow line, and then running the PHREEQC (version 2) batch modeling
procedure, to simulate chemical balances and compositional variations of
groundwater within the geochemical system. For the flow path data discussed
here, there was close agreement between the model results and the observed
hydrochemistry, and so the proposed geochemical evolution model was deemed
reliable.