Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed
The study was conducted in the Birr watershed at twelve gully heads located close to each other. The survey includes measurements of morphological features, soil properties, water table elevations and catchment characteristics including erosion at each gully head. The analysis showed that gully head...
| Autores principales: | , , , , , , |
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| Formato: | Conference Paper |
| Lenguaje: | Inglés |
| Publicado: |
2015
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| Acceso en línea: | https://hdl.handle.net/10568/75751 |
| _version_ | 1855529935962112000 |
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| author | Addisie, Meseret B. Ayele, Getaneh K. Gessess, A.A. Tilahun, Seifu A. Moges, M. M. Schmitter, Petra S. Steenhuis, Tammo S. |
| author_browse | Addisie, Meseret B. Ayele, Getaneh K. Gessess, A.A. Moges, M. M. Schmitter, Petra S. Steenhuis, Tammo S. Tilahun, Seifu A. |
| author_facet | Addisie, Meseret B. Ayele, Getaneh K. Gessess, A.A. Tilahun, Seifu A. Moges, M. M. Schmitter, Petra S. Steenhuis, Tammo S. |
| author_sort | Addisie, Meseret B. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The study was conducted in the Birr watershed at twelve gully heads located close to each other. The survey includes measurements of morphological features, soil properties, water table elevations and catchment characteristics including erosion at each gully head. The analysis showed that gully head morphology could be explained by the role of different gully head controlling factors. The result suggested the maximum rate of head cut retreat reaches from 0 to 22.5m. There was no head retreat recorded from the arrested heads relative to unprotected heads. Compared to semiarid highlands of northern Ethiopia, the average short term head cut retreat was 12 fold greater. From the direct shear test, angle of internal friction by far greater than the slope of gully heads which are located at flat lands. The width depth ratio showed that the shallow depth heads were controlled by fluvial erosion whereas for the deep gully heads both fluvial and mass wasting due tension cracks are operating. In this study a significant power relationship established between the volume of the gully head and the length of retreat at the active gullies with V = 4.85 L1.05 (R2 = 0.91 and P= 0.042) which is different from the relation obtained from the entire gully system as a result of varies controlling factors. |
| format | Conference Paper |
| id | CGSpace75751 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| record_format | dspace |
| spelling | CGSpace757512025-10-14T15:09:09Z Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed Addisie, Meseret B. Ayele, Getaneh K. Gessess, A.A. Tilahun, Seifu A. Moges, M. M. Schmitter, Petra S. Steenhuis, Tammo S. hydrogeology geomorphology morphology humid zones highlands watersheds water table soil properties gully erosion landscape case studies The study was conducted in the Birr watershed at twelve gully heads located close to each other. The survey includes measurements of morphological features, soil properties, water table elevations and catchment characteristics including erosion at each gully head. The analysis showed that gully head morphology could be explained by the role of different gully head controlling factors. The result suggested the maximum rate of head cut retreat reaches from 0 to 22.5m. There was no head retreat recorded from the arrested heads relative to unprotected heads. Compared to semiarid highlands of northern Ethiopia, the average short term head cut retreat was 12 fold greater. From the direct shear test, angle of internal friction by far greater than the slope of gully heads which are located at flat lands. The width depth ratio showed that the shallow depth heads were controlled by fluvial erosion whereas for the deep gully heads both fluvial and mass wasting due tension cracks are operating. In this study a significant power relationship established between the volume of the gully head and the length of retreat at the active gullies with V = 4.85 L1.05 (R2 = 0.91 and P= 0.042) which is different from the relation obtained from the entire gully system as a result of varies controlling factors. 2015 2016-06-16T09:29:12Z 2016-06-16T09:29:12Z Conference Paper https://hdl.handle.net/10568/75751 en Limited Access Addisie, M. B.; Ayele, G. K.; Gessess, A. A.; Tilahun, S. A.; Moges, M. M.; Schmitter, Petra S.; Steenhuis, T. S. 2015. Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed. Paper presented at the 3rd International Conference on the Advancements of Science and Technology [ICAST], Bahir Dar, Ethiopia, 8-9 May 2015. 7p. |
| spellingShingle | hydrogeology geomorphology morphology humid zones highlands watersheds water table soil properties gully erosion landscape case studies Addisie, Meseret B. Ayele, Getaneh K. Gessess, A.A. Tilahun, Seifu A. Moges, M. M. Schmitter, Petra S. Steenhuis, Tammo S. Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed |
| title | Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed |
| title_full | Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed |
| title_fullStr | Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed |
| title_full_unstemmed | Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed |
| title_short | Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed |
| title_sort | hydro geomorphological features at gully heads in the humid northern ethiopian highlands birr watershed |
| topic | hydrogeology geomorphology morphology humid zones highlands watersheds water table soil properties gully erosion landscape case studies |
| url | https://hdl.handle.net/10568/75751 |
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