A Comparative Hydrogeochemical Study of Granitic Fractured and Alluvial Channel Aquifer Systems

1
Jacob Nyende
Jacob Nyende
2
Modreck G
Modreck G
3
Van Tonder G
Van Tonder G
1 Kyambogo University

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Hydrogeochemical investigations were carried out with the aim of assessing the geochemical water composition and processes governing groundwater hydrochemistry in Alluvial Aquifer of the Modder River catchment in Southern Africa and the granitic fractured Aquifer of Pallisa District in eastern Uganda. This was based on chemical analyses of water samples from existing wells and new boreholes in the two study areas. From the analyses, there were 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 good quality and is suitable for drinking and irrigation purposes in the two study areas except for a few locations. Na and HCO3 are dominant with respect to the chemical composition of the groundwater. Detailed studies of the hydrogeochemical processes in the alluvial and granitic aquifer systems also shown that dissolution of silicate weathering, dolomite and calcite minerals, ion exchanges as well as anthropogenic influence to a lesser extent are the dominant hydrogeochemical processes that control groundwater quality. The increase in salinity is related to the dissolution of minerals in the host rocks and the evaporative concentration of solutes.

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No external funding was declared for this work.

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The authors declare no conflict of interest.

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No ethics committee approval was required for this article type.

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Not applicable for this article.

Jacob Nyende. 2014. \u201cA Comparative Hydrogeochemical Study of Granitic Fractured and Alluvial Channel Aquifer Systems\u201d. Global Journal of Science Frontier Research - H: Environment & Environmental geology GJSFR-H Volume 14 (GJSFR Volume 14 Issue H2): .

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GJSFR Volume 14 Issue H2
Pg. 17- 32
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Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

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v1.2

Issue date

June 16, 2014

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English

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Hydrogeochemical investigations were carried out with the aim of assessing the geochemical water composition and processes governing groundwater hydrochemistry in Alluvial Aquifer of the Modder River catchment in Southern Africa and the granitic fractured Aquifer of Pallisa District in eastern Uganda. This was based on chemical analyses of water samples from existing wells and new boreholes in the two study areas. From the analyses, there were 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 good quality and is suitable for drinking and irrigation purposes in the two study areas except for a few locations. Na and HCO3 are dominant with respect to the chemical composition of the groundwater. Detailed studies of the hydrogeochemical processes in the alluvial and granitic aquifer systems also shown that dissolution of silicate weathering, dolomite and calcite minerals, ion exchanges as well as anthropogenic influence to a lesser extent are the dominant hydrogeochemical processes that control groundwater quality. The increase in salinity is related to the dissolution of minerals in the host rocks and the evaporative concentration of solutes.

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A Comparative Hydrogeochemical Study of Granitic Fractured and Alluvial Channel Aquifer Systems

Jacob Nyende
Jacob Nyende Kyambogo University
Modreck G
Modreck G
Van Tonder G
Van Tonder G

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