Vol. 3, Issue 6 (2016)
Ground water salinity in Bara Basin
Author(s): Omer Adam M Gibla, Mohammed Ahmed Hassan El-Tayeb, Abd EL-Salam Abdalla Dafa Alla, Esraa Omer Adam Mohammed
Abstract: Bara basin covers a highly populated area in northern Kordofan. The area depends completely on ground water as a source for human drinking, animal watering and to a lesser extent for irrigation. Ground water here used as raw water by consumers without any treatment. The bore holes occurrence is limited. The most available wells are open shaft wells (hand dug wells), or pump wells. Within the basin, there are many zones or pockets which are characterized by high salinity. The basin is now one of the main choices to solve the problem of drinking water deficiency in El-Obeid town. The depth of the wells in the area varies considerably from (10- 20 meters) in some areas and from (40- 70 meters) or more and this may be a reason for some changes in the ground water quality depending on type of soil layer or water bearing rocks formation. The aim of this study was to measure the most essential parameters that determine drinking water quality. The study also aimed to determine the extent of salinity in certain zones and pockets in the area. Fourty five water samples were collected from four sections. Two sections showed fresh and moderate saline properties. The other two sections showed high salinity which can be compared to that of sea water. The measured variables include pH values, turbidity, total dissolved solids (TDS), electrical conductivity (EC), and total alkalinity. The results of analysis show that the drinking water quality is generally good according to drinking water standards established by WHO, (1984, 1993) , European standards for drinking water (1970)  and Sudanese Standards and Metrology Organization (2002). The results also showed existence of some pockets with significantly high salinity. In certain areas the water quality was found to range from unsafe for human use to brackish water.