Dejytnu, Tilahun (2007) The Role of Arundo Donax in Riparian Vegetation in Mitigating River Pollution in Addis Ababa: The Case of Bulbula River. Masters thesis, Addis Ababa University.
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Abstract
Addis Ababa is one of the highly populated urban and industrial centers in the country. A considerable amount of waste is generated every day from different point and non point sources. Since the city has inadequate solid and liquid waste management facilities, wastes generated from different sources end up in many of the rivers and streams in the city. Bulbula River is one of them. The objective of the study was to assess the sources of pollutants and their sinks such as plants and soils thereby to suggest possible management practices for Bulbula riverbank and forward ways to prevent the river from degradation and pollution. Water, soil and plant samples were collected from three different locations along the Bulbula River, namely the upper, middle and lower zones. Major pollutants were identified from relevant literature and all samples were analyzed for the same. The water analysis result indicated that there is sever pollution of the stream by Cl- , PO4-3, Mn2+ and Fe2+ due to high amount of wastes disposed into the Bulbula River from solid and liquid Municipal sources, construction areas, fuel stations, garages, Hospitals and congested settlements. Similarly, the soil analysis result indicated that much of the P, N, Mn2+, Fe2+, Zn2+ and Cu2+ are stored in the soil in the middle and lower zones. This may show that the soil serves as a sink to many of the pollutants generated from various sources. The plant analysis result generally indicated that the species Arundo donax absorbs Fe2+, Mn2+ and Zn2+ than Cu2+, N and P, at the middle and lower zone of Bulbula River bank, which are sites where much of the pollutants get into the river. The species Arundo donax accumulated high amount of Fe2+and Mn2+ (an amount considered toxic to many crops), without developing chlorotic symptoms. Since the species Arundo donax reduces excess metals from the stream and stream banks, planting of Arundo donax along the banks of Bulbula River could serve the best management practice.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Bulbula River, Arundo donax, Phytoextraction, riverbank, River pollution, uncontrolled waste disposal. |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > QK Botany |
| Divisions: | Africana |
| Depositing User: | Selom Ghislain |
| Date Deposited: | 01 Oct 2018 11:55 |
| Last Modified: | 01 Oct 2018 11:55 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/5832 |
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