TITLE:
Hydrochemical Characteristics of the Groundwater AQ1 of the Region from Pointe-Noire to Congo Brazzaville
AUTHORS:
D. Nkounkou Tomodiatounga, B. Mabiala, G. Moukandi Nkaya
KEYWORDS:
Hydrochemistry, Unconfined Water AQ1, Pointe-Noire
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.4 No.9,
September
28,
2016
ABSTRACT: The study is interested in chemical quality of water of the one of the
five aquifers, unconfined water AQ1, (other free groundwaters AQ2, AQ3, AQ4 and
AQ5 being captive) in the area of Pointe-Noire. A series of physicochemical
analysis was carried out on the samples of water of the zone. The results of
these analyses were treated starting from a chemical-hydro method which uses
the diagrams of Piper, Stabler, Schoeller Berkaloff, Stiff, Wilcox and the
statistical methods classic. These chemical-hydro results made it possible to
highlight the prevalence of sodic and potassic facies chlorinated in groundwaters
of the unconfined water of the area of Pointe-Noire. In this area, the
groundwaters of the unconfined water gather in three principal-hydrofacies:
sodic and potassic chlorinated waters are the most important (66.7%) in the
studied water; calcic and magnesian bicarbonated water (16.65%) and bicarbonated
sodic and potassic ones (16.65%). This study reveals that the groundwaters of
the area of Pointe-Noire undergo an intrusion saltworks. As a whole, these
groundwaters require in certain cases, a specific treatment before consumption.