Tibebe, Degefie (2007) Soil Erosion and Runoff Modeling Using GIS, Remote Sensing and SWAT Model for Keleta Watershed, Ethiopia. Masters thesis, Addis Ababa University.
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Abstract
Soil loss by runoff is the most serious problem in the world today because it is threatening agriculture and also natural environment. It can cause in lowering the productivity of a land temporarily or permanently. In order to reverse such kind of problem assessing the level of problem and finding solution at watershed level is necessary. Accordingly this study initiated to evaluate the soil loss and runoff potential spatially and temporarily in Keleta watershed. In order to achieve this purpose SWAT computer model integrated with GIS and Remote Sensing was used. Accordingly the runoff and soil loss simulation were done by dividing the watershed into twenty sub-watersheds. One hydrological response unit was assigned for each sub-watershed. The simulation result showed that runoff and soil loss was increased through out the simulation period. This situation was strongly correlated with the increasing trend of rainfall. Spatially the runoff amount was correlated with the type of soil and land use system. Chromic Vertisol and Eutric Cambisol with cultivated land use were characterized by high runoff potential. The soil loss rate was correlated with type of soil, slope gradient and land use system. Higher soil loss was observed from Eutric Cambisol, slope gradient greater than 25% with cultivated land use system. Prioritization of sub watershed was undertaken based on the degree of soil loss. Remedial measures were recommended based on the level of priority and type of problem.
| Item Type: | Thesis (Masters) |
|---|---|
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > Q Science (General) Q Science > QE Geology T Technology > T Technology (General) |
| Divisions: | Africana |
| Depositing User: | Selom Ghislain |
| Date Deposited: | 01 Oct 2018 12:25 |
| Last Modified: | 01 Oct 2018 12:25 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/5806 |
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