College of Engineering and Technology

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Browsing College of Engineering and Technology by Author "Abdul, Abdallah"

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    Study of nitrogen and heavy metals contamination in Geita district and possible mitigation measures.
    (University of Dar es Salaam, 2008) Abdul, Abdallah
    Geita wetland is located downstream of both artisanal gold mining activities carried out by local communities and a modern large-scale goldmine, each operating to a distinct drainage line. Recent study carried out in Geita wetland by the Lake Victoria Environmental Management Project (LVEMP) revealed a remarkable amount of heavy metals (Hg, Cu and Ni) in Mtakuja and Mabubi rivers. The study also discovered that agricultural and domestic activities in the wetland have introduced high amount of nutrients in the rivers. Using existing data from LVEMP and others obtained during field work of this study, a river water quality model (DUFLOW) for Mabubi River is developed. With the support of the results from DUFLOW model, this study will analyze nitrogen and heavy metals pollution levels in Mabubi and Mtakuja rivers and its variations during wet and dry periods and between upstream and downstream locations. It is anticipated that the information from the water quality model will help water quality managers to develop managerial tools and guidelines and also provide an improved understanding of the impact caused by human development activities such as agricultural and mining to the water quality of these rivers and others of the similar nature. The results of simulation show that DUFLOW model perform fairly better on the heavy metals as small discrepancies may be due to limited data and short sampling periods.