EGU23-491, updated on 24 Nov 2023
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Groundwater Quality Assessment and Geochemical Mechanism of Groundwater of Komadugu-Yobe Basin, West Africa

Abdulrahman Shuaibu1,2, Robert M. Kalin1, and Vernon Phoenix1
Abdulrahman Shuaibu et al.
  • 1University of Strathclyde, Civil and Environmental Engineering, Glasgow, G1 1XJ, UK (
  • 2Ahmadu Bello University Zaria, Department of Water Resources and Environmental Engineering

The assessment of groundwater quality and its geochemical mechanism is crucial for the sustainable use and management of groundwater resources in arid and semi-arid regions of developing nations. 120 groundwater samples were collected from the Komadugu-Yobe basin to determine its overall quality and the factors that controls the geochemical mechanisms of the groundwater of the study region. The pH, electrical conductivity (EC), and total dissolved solids (TDS) of the groundwater samples were analysed in situ using a handheld (Model 99720 pH/Conductivity meter). The concentrations of Na+, Ca2+, Mg2+, and K+ were analyzed using ICP-OES, iCAP 6200, Thermo Fisher Scientific while Cl-, F-, SO42-, and NO3- were analysed using Ion Chromatography (Metrohm 850 Professional IC). Moreover, the total Alkalinity and bicarbonate were determined using KONE Aquakem v. 7.2.AQ2 equipment by titrimetric method. The hydrochemical analysis results reveals that less than 10% of the groundwater samples exceeded the maximum permissible limits for Electrical conductivity, total dissolved solids, total hardness, sodium, potassium, calcium, magnesium, chloride, sulfate, and fluoride for drinking purposes as recommended by the world Health Organization (WHO, 2018) standards except for bicarbonate and nitrate. The Gibbs diagrams reveals that rock-weathering/rock water interaction is the dominant mechanism controlling groundwater of the study region. However, the chemical relationships in Piper trilinear plots identified Ca2+-Mg2+- HCO-3 water type predominated the study area constituting about 59% of the groundwater samples collected. The findings of the study are paramount for implementing a sustainable management strategy of groundwater resources in the Komadugu-Yobe basin towards the realization of Goal 6 of sustainable development goals.

Keywords: Groundwater, Komadugu-Yobe basin, Geospatial analysis, Water quality, Rock-water interaction

How to cite: Shuaibu, A., M. Kalin, R., and Phoenix, V.: Groundwater Quality Assessment and Geochemical Mechanism of Groundwater of Komadugu-Yobe Basin, West Africa, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-491,, 2023.