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Chemical Evolution of Groundwater in the Dindefello Plain Area in South-Eastern Senegal

This study was to clarify the main mechanisms of shallow groundwater mineralization in the Din- defello Plain Area. Water composition data obtained in this study were subjected to aqueous spe- ciation 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 sam- ple 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 bal- ances 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.

Auteur(s) : Seybatou Diop and Moshod N. Tijani
Pages : 1793-1815
Année de publication : 2014
Revue : Journal of Water Resource and Protection
N° de volume : Vol.6 No.19
Type : Article
Mise en ligne par : DIOP Seybatou