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1 Tamene, L.; Adimassu, Zenebe; Aynekulu, E.; Yaekob, T.. 2017. Estimating landscape susceptibility to soil erosion using a GIS-based approach in northern Ethiopia. International Soil and Water Conservation Research, 5(3):221-230. [doi: https://doi.org/10.1016/j.iswcr.2017.05.002]

Soil profiles ; Soil conservation ; Erosion ; Geographical information systems ; Landscape conservation ; Land degradation ; Sediment transport ; Sedimentation ; Watersheds ; Catchment areas ; Rain ; Reservoir storage / Ethiopia

(Location: IWMI HQ Call no: e-copy only Record No: H048139)

http://www.sciencedirect.com/science/article/pii/S209563391630137X/pdfft?md5=f2cd5081ebf0f23056b3f7a851d98187&pid=1-s2.0-S209563391630137X-main.pdf
https://vlibrary.iwmi.org/pdf/H048139.pdf

(1.29 MB)

Soil erosion is a very critical form of land degradation resulting in the loss of soil nutrients and downstream sedimentation of water storages in the highlands of Ethiopia. As it is technically and financially impossible to conserve all landscapes affected by erosion, identification of priority areas of intervention is necessary. Spatially distributed erosion models can help map landscape susceptibility to erosion and identify high erosion risk areas. Integration of erosion models with geographic information systems (GIS) enables assessing evaluate the spatial variability of soil erosion and plan implementing conservation measures at landscape levels. In this study, the Revised Universal Soil Loss Equation adjusted for sediment delivery ratio was used in a GIS system to assess landscape sensitivity to erosion and identify hotspots. The approach was applied in three catchments with size being 10–20 km2 and results were compared against quantitative and semi-quantitative data. The model estimated mean soil loss rates of about 45 t ha-1 y-1 with an average variability of 30% between catchments. The estimated soil loss rate is above the tolerable limit of 10 t ha-1 y-1. The model predicted high soil loss rates at steep slopes and shoulder positions as well as along gullies. The results of the study demonstrate that knowledge of spatial patterns of high soil loss risk areas can help deploy site-specific conservation measures.

2 Tamene, L.; Yaekob, T.; Mekonnen, K.; Woldearegay, K.; Adimassu, Zenebe; Ellison, J.; Gurmessa, B.; Alene, T.; Dubale, W.; Kassie, G.; Thorne, P. 2019. Landscape management: Africa RISING [Research in Sustainable Intensification for the Next Generation] project R4D experiences in the Ethiopian highlands. In Mekonnen, K.; Yasabu, S.; Gebremedhin, B.; Woldemeskel, E.; Tegegne, A.; Thorne, P. (Eds.). Proceedings of a Workshop and Exhibition on Promoting Productivity and Market Access Technologies and Approaches to Improve Farm Income and Livelihoods in Ethiopia: Lessons from Action Research Projects, Addis Ababa, Ethiopia, 8-9 December 2016. Nairobi, Kenya: International Livestock Research Institute (ILRI). pp.55-59.

Landscape conservation ; Agricultural research for development ; Projects ; Highlands ; Land management ; Water management ; Technology ; Stakeholders / Africa / Ethiopia / Debre Birhan / Hosanna

(Location: IWMI HQ Call no: e-copy only Record No: H049336)

https://cgspace.cgiar.org/bitstream/handle/10568/102356/AR_proceedings_2019.pdf?sequence=1&isAllowed=y
https://vlibrary.iwmi.org/pdf/H049336.pdf

(1.14 MB) (6.23 MB)

3 Yaekob, T.; Tamene, L.; Gebrehiwot, S. G.; Demissie, S. S.; Adimassu, Zenebe; Woldearegay, K.; Mekonnen, K.; Amede, T.; Abera, W.; Recha, J. W.; Solomon, D.; Thorne, P. 2022. Assessing the impacts of different land uses and soil and water conservation interventions on runoff and sediment yield at different scales in the central highlands of Ethiopia. Renewable Agriculture and Food Systems, 37(S1):S73-S87. (Special issue: Restoring Degraded Landscapes and Fragile Food Systems) [doi: https://doi.org/10.1017/S1742170520000010]

Land use ; Soil conservation ; Erosion ; Water conservation ; Impact assessment ; Highlands ; Watersheds ; Runoff ; Sediment yield ; Discharges ; Soil loss ; Hydrological factors ; Rain / Ethiopia / Gudo Beret

(Location: IWMI HQ Call no: e-copy only Record No: H049533)

https://www.cambridge.org/core/services/aop-cambridge-core/content/view/4F63E376EE1DAEB257043E7197E5B060/S1742170520000010a.pdf/assessing_the_impacts_of_different_land_uses_and_soil_and_water_conservation_interventions_on_runoff_and_sediment_yield_at_different_scales_in_the_central_highlands_of_ethiopia.pdf
https://vlibrary.iwmi.org/pdf/H049533.pdf

(1.41 MB) (1.41 MB)

To tackle the problem of soil erosion and moisture stress, the government of Ethiopia introduced a yearly mass campaign where communities get together and implement various soil and water conservation (SWC) and water harvesting (WH) practices. Although the interventions are believed to have reduced soil erosion/sediment yield and enhanced surface and ground water, quantitative information on the impacts of various options at different scales is scarce. The objective of this study was to assess the impacts different land uses, SWC and WH interventions on water and suspended sediment yield (SSY) at plot and watershed scales in the central highlands of Ethiopia. Standard erosion plot experiments and hydrological stations were used to monitor the daily water and SSY during 2014 to 2017. The results show differences between treatments both at plot and watershed scales. Runoff and soil loss were reduced by an average 27 and 37%, respectively due to SWC practices at the plot level. Overall, SWC practices implemented at the watershed level reduced sediment yield by about 74% (in the year 2014), although the magnitude of sediment reduction due to the SWC interventions reduced over time. At both scales it was observed that as the number of years since SWC measures have been in place increased, their effectiveness declined due to the lack of maintenance. This study also revealed that extrapolating of plot data to watershed scale causes over or under estimation of net erosion.