Assessment of water eutrophication on Boyo Lake Ethiopia

B.Sc. Haydiso Bereket Detamo, MSc

Master's thesis

Abstract:

Eutrophication is one of the most complex forms of water pollution, caused by the high level of nutrients in the water, mainly phosphate and nitrate. In most developing countries like Ethiopia, Runoff is collected from agricultural areas during rainfall and irrigation activities from different catchments flowing directly to receiving water bodies without treatment. Nutrients like nitrogen and phosphorus that carried away from main agricultural farming areas by runoff directly flow into the water bodies like rivers and lakes. Eutrophication of lakes and deteriorating water quality have become major environmental problems in urban areas and fertilized basins in developing countries worldwide. The purpose of this paper is to illustrate the effect of excessive fertilizer use on receiving water bodies at Boyo Lake in Ethiopia and suggest a solution to reduce the excess nutrients flowing to water bodies. The paper compared the water quality standard of WHO freshwater nutrient guidelines with the Eutrophication standard of Boyo lakes and evaluated the degree of eutrophication of the lakes. Further, the show recommended best practices to prevent Lake Eutrophication. This paper has advanced the assessment of water eutrophication from simple individual parameters like total phosphorus and total nitrogen. Also, evaluate the water chlorophyll-a level. However, further studies are needed to determine how eutrophication affects biomass and species composition in this lake.

Keywords

Eutrophication, Total Nitrogen and, Total Phosphorus

Language used: English

Date on which the thesis was submitted / produced: 30. 3. 2022

Thesis defence

• Supervisor: doc. Ing. Jakub Štibinger, CSc.

Czech University of Life Sciences Prague

Faculty of Environmental Sciences

Master programme / field:
Forestry Engineering / Forestry, Water and Landscape Management