The Geology of Perched Aquifers and Hydrochemistry of Springs in Nsukka Area, South-Eastern Nigeria

D.C. Ozoko


The lithology of perched aquifers in Nsukka consists of laterites, red sands and gravels. The aquifers yield small but significant volumes of water to various hand-dug wells and springs in the area. It was found that they also contribute significantly to the iron enrichment in the spring waters. The spring waters and hand-dug waters are basically acidic. The Eh range is from 109mv to 389mv. The principal ions are Mg2+ and HCO3- thus yielding a Mg2+-HCO3 type. While Mg2+/Ca2+ ratios indicate that cation exchange reactions help in defining the cation chemistry. The Na+/Cl- ratios shows that the aquifers are well flushed.

Keywords: Perched aquifers; springs; iron; ratios; hand-dug wells.

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ISSN (Paper)2224-3216 ISSN (Online)2225-0948

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