Caractérisation Hydrogéochimique des Aquifères du Bassin de Timia (Massif de l’Aïr, Nord du Niger)

Abstract

The Timia Basin is located in the Aïr Massif (Northern Niger). In this area, water resources are represented by altered and fissured basement and alluvial aquifers. These aquifers, are solicited for the water supply, and irrigation. These activities have for consequences the degradation of the quality of these waters. The objective of this study is to determine the physicochemical characteristics and the mechanisms house control the mineralization of groundwater in Timia area. The methodology based on hydrochemical approaches and principal component analysis shows that groundwater chemistry are dominated by calcium-magnesium bicarbonate facies (52%). Sodium-potassium bicarbonate facies are also important (29%) while, sodium hyper-bicarbonate waters (13%) are poorly represented. The sources who controlled the water mineralization are mainly of three types: superficial supply (pollution), hydrolysis of silicate minerals and volcanic activities.

Mineralization of Natural Spring Water in the City of Daloa (West-Central Côte d’Ivoire)

“…The majority of these waters are very weakly mineralised. Other studies have concluded that the acquisition of groundwater mineralization is due to surface water inflow by infiltration (Alhassane et al, 2019). Moreover, the strong correlations between nitrates ( 3 NO − ), nitrites ( 2 NO − ) and EC (r > 0.90) show a strong influence of this phenomenon in the acquisition of mineralisation.…”