Evaluation of hydrogeochemical characteristics of groundwater in parts of the lower Benue Trough, Nigeria |
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| Authors: | T N Nganje C I Adamu A N Ugbaja and A E Amah |
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| Institution: | (1) Dept. Geology &; Mining, Nasarawa State Universit, Keffi, Nigeria |
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| Abstract: | The aim of this work is to evaluate the hydrogeochemical characteristics of groundwater in parts of the lower Benue Through
in Nigeria as well as to evaluate the variation in groundwater chemistry data and the suitability of the groundwater for drinking
and other domestic purposes. This was based on chemical analyses of 44 water samples from existing wells and boreholes in
the study area. From the statistical analysis (wide ranges, median and standard deviation), it is obvious that there are significant
variations in the quality/composition of groundwater in the period of sampling. The calculated SAR, Na% and RSC values indicated
that the water is of excellent to good quality and is suitable for irrigation. Na and HCO3 are dominant with respect to the chemical composition of the groundwater. On the basis of water chemistry, hydrochemical
indices and factor analysis the dominant controls or processes affecting the distribution of geochemical variables in the
study area have been shown to be water/rock interaction which is mainly controlled by carbonate and silicate dissolution as
well as anthropogenic influence to a lesser extent. Additional processes include cation exchange reactions and reverse ion
exchange to a minor extent. |
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