University of Khartoum

Evaluation of Some Water Characteristics of The Blue Nile in Khartoum State as Indicators of River Nile Pollution

Evaluation of Some Water Characteristics of The Blue Nile in Khartoum State as Indicators of River Nile Pollution

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Title: Evaluation of Some Water Characteristics of The Blue Nile in Khartoum State as Indicators of River Nile Pollution
Author: KHILLA, EVELINE EDWARD AYAD
Abstract: The study investigated some physical, chemical and biological characteristics of the Blue Nile River in Khartoum State. Four sites were chosen and studied namely , River Transport Corporation, Burri and Bahri Power Stations and Manshiya Bridge (under construction) between May and July 2003. Four classes of phytoplankton were encountered: Chlorophyceae, Chrysophyceae, Bacillariophyceae, Cyanophycaeae; with the last two classes being the most dominant. The zooplankton was represented by the genera Copepoda – the dominant one - , Cladocera and Rotifera. River Transport Corporation site showed higher Total Coliform Counts during May and June, while all four stations showed the highest count ( >100 MPN per 100ml ) in July. Values for Total Coliform and feacal bacteria were higher than previous studies which could be an indication that the Blue Nile River is polluted with both total coliform and feacal coliform bacteria. Pollution indicators were also manifested in relatively higher values of BOD, COD, and NO3 – N, NO2-N. This could be attributed to anthropogenic activities such as brickeries, agricultural runoff, human and animal waste. Some of the changes were attributed to the natural hydrological regime of the Blue Nile River such as increase of temperature, transparency and pH, at low flood period and the increase in TDS and conductivity ; decline in transparency besides the disappearance of plankton with the onset of floodwater. The site of Manshiya Bridge exhibited lowest transparency values due to dredging activities. The investigation within the Manshiya Bridge Site (under construction), albeit done in a preliminary way, is the first of its kind in Sudan. The data indicate that the Blue Nile River within Khartoum State has undergone physical, chemical and biological changes. The magnitude, causes and trends are yet to be elucidated. The study calls for an urgent, proper and long-term investigation of the Blue Nile as well as the major rivers in Sudan.
Description: 127 page
URI: http://khartoumspace.uofk.edu/handle/123456789/10701
Date: 2015-05-13


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