Abstract
The present study was carried out in Khor Adeit area, northeastern Sudan with the objectives of discussing the hydrochemical characteristics of groundwater in alluvial aquifer, and assessing groundwater quality and suitability for drinking. Twelve groundwater samples were collected and analyzed for physical and chemical parameters. Water temperature exhibited a normal range. Remarkable temporal variation in groundwater quality in terms of salinity during wet and dry seasons was observed. The groundwater of the study area was soft to very hard, and it could be grouped into two hydrochemical faces namely: Group (A) K-Na Cl-HCO3-SO4-water type and group (B) Na-K-Cl SO4-water type. Hydrolysis of potash feldspar and plagioclase was found to be responsible for high concentrations of K and Na respectively. While the oxidation of ferromagnesian minerals was a possible source for Mg. Remarkable spatial variation in groundwater composition was attributed to variable recharge of the aquifer and different lithology. Groundwater quality parameters for group (A) fell within the acceptable range of the local and the WHO Guidelines for drinking water; while group (B) parameters did not. The study has recommended for drilling of water wells to be conducted in parts of the wadi occupied by fresh groundwater.
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