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2012 (Vol. 4, Issue: 01)
Article Information:

Multivariate Statistical and Spatial Assessment of Groundwater Quality in the Tolon-Kumbungu District, Ghana

S.J. Cobbina, F.A. Armah and S. Obiri
Corresponding Author:  S.J. Cobbina 

Key words:  Contamination, Ghana, groundwater, multivariate, physicochemical, spatial,
Vol. 4 , (01): 88-98
Submitted Accepted Published
2011 August, 23 2011 October, 07 2012 January, 01
Abstract:

The study was conducted to assess the quality of groundwater in 47 boreholes in the Tolon Kumbungu District of Ghana, using multivariate statistical and spatial techniques. The results indicate that physicochemical parameters exhibit wide variability. About 8.5% of the samples recorded pH outside World Health Organization recommended limit of 6.5-8.5. Approximately 43% of samples recorded conductivity levels higher than 1000 μS/cm, while close to 19% of boreholes recorded total iron concentrations above 0.3 mg/L. Approximately 3.4% of boreholes recorded arsenic concentrations above 0.01 mg/L. Alkalinity ranged from 28 to 766 mg/L CaCO3 ; and groundwater in the area can be considered to have relatively high buffering capacity. Turbidity was associated with mineral matter suspension (Fe). Principal component analysis indicates that the data is a three-component system explaining 65% of the total variance. The first two components account for more than 50% of the total variance. Cluster analysis categorised the sampling locations into three spatially dissimilar groups. The natural hydrochemistry of the groundwater system appears to explain much of the variability of the data. However, a groundwater monitoring programme is recommended to characterise the variability of the parameters over longer temporal scales.
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  Cite this Reference:
S.J. Cobbina, F.A. Armah and S. Obiri, 2012. Multivariate Statistical and Spatial Assessment of Groundwater Quality in the Tolon-Kumbungu District, Ghana.  Research Journal of Environmental and Earth Sciences, 4(01): 88-98.
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