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| Titel |
Sediment management modelling in the Blue Nile Basin using SWAT model |
| VerfasserIn |
G. D. Betrie, Y. A. Mohamed, A. Griensven, R. Srinivasan |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 3 ; Nr. 15, no. 3 (2011-03-08), S.807-818 |
| Datensatznummer |
250012682
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| Publikation (Nr.) |
 copernicus.org/hess-15-807-2011.pdf |
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| Zusammenfassung |
| Soil erosion/sedimentation is an immense problem that has threatened water
resources development in the Nile river basin, particularly in the Eastern
Nile (Ethiopia, Sudan and Egypt). An insight into soil erosion/sedimentation
mechanisms and mitigation methods plays an imperative role for the
sustainable water resources development in the region. This paper presents
daily sediment yield simulations in the Upper Blue Nile under different Best
Management Practice (BMP) scenarios. Scenarios applied in this paper are (i)
maintaining existing conditions, (ii) introducing filter strips, (iii)
applying stone bunds (parallel terraces), and (iv) reforestation. The Soil
and Water Assessment Tool (SWAT) was used to model soil erosion, identify
soil erosion prone areas and assess the impact of BMPs on sediment
reduction. For the existing conditions scenario, the model results showed a
satisfactory agreement between daily observed and simulated sediment
concentrations as indicated by Nash-Sutcliffe efficiency greater than 0.83.
The simulation results showed that applying filter strips, stone bunds and
reforestation scenarios reduced the current sediment yields both at the
subbasins and the basin outlets. However, a precise interpretation of the
quantitative results may not be appropriate because some physical processes
are not well represented in the SWAT model. |
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