Ea. Farah et al., GROUNDWATER RESOURCES IN A SEMIARID AREA - A CASE-STUDY FROM CENTRAL SUDAN, Journal of African earth sciences, and the Middle East, 25(3), 1997, pp. 453-466
Hydrogeological investigations were carried out to evaluate the ground
water resources in the northern part of the Khartoum Basin, central Su
dan. The hydrogeological system consists of two aquifers. The upper aq
uifer includes mainly the Upper Gezira Formation, the upper part of th
e Lower Gezira Formation in the area between the two Niles, and the up
permost parts of the Lower Omdurman Formation in other areas of the st
udy region. The lower aquifer is developed mainly in the other deeper
sedimentary sequences. The sedimentological characteristics of the hos
t formations appear to have affected the physico-chemical properties o
f the two aquifers in different ways. The grain size and pumping test
analyses indicate the higher productivity of the lower aquifer, where
the water storage is approximately eight times as much as the upper on
e. Except in a few parts of the upper aquifer, groundwater in the stud
y area is free from objectionable properties in relation to drinking a
nd irrigation demands. (C) 1997 Elsevier Science Limited.