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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/1849

Authors: Behailu, Berehanu
Advisors: Dr. Tamiru Alemayehu
Copyright: 2007
Date Added: 22-Dec-2008
Publisher: Addis Ababa University
Abstract: This work is the study of the hydrogeochemical conditions of the 1506km2 Mojo River Basin, within the Ethiopian Rift Valley, found about 70km2 south east of Addis Ababa, between longitudes 380 56' E – 390 17'E and 80 34' N – 90 05' N latitude. The Mojo River Basin is in a state of progressive population growth and industrialization as well as agricultural activities, which are all potential sources of surface and groundwater pollution in the Basin. The main objectives of the present research are identifying the major pollutant in the Mojo River, study the groundwater quality in the basin and identify its pollution condition of groundwater using hydrogeochemistry. The final use of such a study is to indicate the possible measures to be applied to prevent or reduce local sources of pollution of Mojo River in turn regional groundwater pollution. Collection of water samples from surface (stream) and groundwater (borehole, dug well and spring) was done in two field operations at two different time periods. Physical and chemical tests have been carried out in the field and in the laboratory. In the field physical parameters such as pH, temperature and conductivity were measured in situ. The main rock types in the Mojo River Basin range in age from Upper Miocene to Holocene and consist of consolidated volcanic(plateau and Rift Volcanic) and loose Lacustrine and alluvial deposit. Overall, the water in the study area is a calcium-Sodium -Magnesium-Bicarbonate type which is characterized by a high concentration of Ca++, Na, Mg++ and HCO3 -. Mojo River is used for variety of purposes by inhabitants along their course. However, the discharge of domestic and industrial wastes from the town highly limits the applicability of surface water and also the quality of the groundwater in the area is deteriorated by infiltration of polluted water.
Description: A thesis submitted to the School of Graduate Studies of Addis Ababa University in partial fulfillment for the degree of Master of Science in Hydrogeology
URI: http://hdl.handle.net/123456789/1850
Appears in:Thesis - Earth Sciences
Thesis - Earth Sciences

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