Abstract
Soil loss is a substantial peril to agricultural production and economic growth in the global world. Rainfall, slope, and cover management have triggered soil erosion risk in the southwestern hills of Ethiopia, yet little is known about the effects of topography via hydro-geomorphic characters on soil loss in the upper Bilate watershed. Therefore, this study was undertaken to evaluate the topographic effects of soil loss for micro-watershed prioritization using morphometric analysis and satellite image data. The combination of basic, linear, and shape parameters were deliberated. DEM 20 m for hydrological analysis, and Sentinel-2 A image, and soil and rainfall as ancillary data were considered. On the premise of their links with erodibility, the morphometric parameters were considered to set the micro-watersheds and demote spots on the premise of their links with erodibility to obtain compound parameters (Cp) esteem for prioritization. The result revealed that about 38.8% of the total catchment suffering from very high-to-high topographic effects of soil erosion in the upper Bilate watershed. The micro-watershed (MWSDs 8 and 6) has a very high priority; MWSDs 3, 5, 11, and 16 have a high priority; and MWSDs 17, 18, and 10 have a low to very low priority. The combination of morphometric parameters has triggered the soil loss vulnerability for deemed priority watersheds, and this will have a great implication on food security, thereby paralyzing the regional economy in the watershed. Therefore, paying for substantial economic and political status for defenseless micro-watersheds is required for land preservation measures.
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Abbreviations
- ARI :
-
Agricultural Research Institute
- DEM :
-
Digital elevation model
- ESA :
-
European Space Agency
- FAO :
-
Food and Agricultural Organization
- GIA :
-
Geospatial Information Agency
- GIS :
-
Geographic information system
- MWSDs :
-
Micro-watersheds
- SWC :
-
Soil-water conservation
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Acknowledgements
The authors extend our gratitude to all participants who contributed to the field data collection and shared their perspectives. We express sincere appreciation to the anonymous reviewers and the editor for their invaluable feedback and insightful comments. Their contributions have significantly enriched the quality of our manuscript, enhancing both the rigor and clarity of our research.
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E.A and K.T.D conceived and designed the study and performed the analysis. K.T.D. analyzed and interpreted the data and wrote the manuscript. K.T.D. and M.B.M follow up on the project, edit, review, and consult the paper.
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Deribew, K.T., Arega, E. & Moisa, M.B. Prediction of the topo-hydrologic effects of soil loss using morphometric analysis in the upper Bilate watershed. Bull Eng Geol Environ 83, 162 (2024). https://doi.org/10.1007/s10064-024-03634-9
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DOI: https://doi.org/10.1007/s10064-024-03634-9