Abstract
This research assesses the hydrogeochemistry of groundwater in Ganye and environs using multivariate statistical analysis. The cation concentrations are in the order of Ca2+ > Mg2+ > K+ Cl-SO2‒4 > CO2‒3. Piper, Doruv and Schoeller diagrams identified two water types as Ca-Mg-HCO3 and Ca-Mg-SO4-Cl. The water type is young water of meteoric origin that resulted from the dissolution of aluminosilicate due to induced chemical weathering. Principal component analysis and hierarchical cluster analysis reveal that natural mineralisation processes accompanied by increased alkalinity, temporary salinity of the water, weathering and rock-water interaction, hardness of water caused by calcium and magnesium ions and anthropogenic contamination are factors responsible for the modification of groundwater chemistry. The results of water quality index revealed that about 30% of the water sources have good quality rating, 53.3% have poor quality rating, 10% fall in the range of very poor, and 6.7% fall within the range of unsuitable for drinking.
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