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Sediment yield variability in Northern Ethiopia: A quantitative analysis of its controlling factors |
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| Authors: | Nigussie Haregeweyn Jean Poesen Jan Nyssen Gerard Govers Gert Verstraeten Joris de Vente Jozef Deckers Jan Moeyersons Mitiku Haile |
| Affiliation: | 1. Department of Land Resources Management and Environmental Protection, Mekelle University, P.O. Box 231, Mekelle, Ethiopia;2. Physical and Regional Geography Research Group, K.U.Leuven, Celestijnenlaan 200 E, B-3001 Heverlee, Belgium;3. Geography Department, Ghent University, Krijgslaan 281, B-9000 Ghent, Belgium;4. Division Soil and Water Management, K.U.Leuven, Celestijnenlaan 200 E, B-3001 Heverlee, Belgium;5. Agriculture and Forestry Economics, Royal Museum for Central Africa, B-3080 Tervuren, Belgium |
| Abstract: | In Tigray-northern Ethiopia, lack of sediment yield data and appropriate methodologies for predicting sediment yield have contributed to poor planning resulting in rapid sedimentation in reservoirs and storage capacity loss. The objectives of this study were: (1) to assess the spatial variability of absolute sediment yield (SY) and area-specific sediment yield (SSY) and to identify their controlling factors for 11 representative catchments and (2) to develop models to predict sediment yield. We quantified sediment yield from reservoir sediment surveys and studied the role of bio-physical characteristics of the catchments and their interactions in controlling SY and SSY variability. |
| Keywords: | Absolute sediment yield Area-specific sediment yield Regression model Reservoir sedimentation Spatial variation |
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