Responses of surface runoff and soil water-erosion to changes in seasonal land cover and rainfall intensity; the case of Shilansha Watershed, Rift Valley Basin of Ethiopia

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cg.contributor.affiliationUniversity of Twenteen
cg.contributor.affiliationInternational Water Management Instituteen
cg.contributor.affiliationArba Minch Universityen
cg.contributor.affiliationUniversity of Aberdeenen
cg.contributor.donorUK Research and Innovation GCRF (Global Challenges Research Fund)en
cg.contributor.donorUniversity of Aberdeenen
cg.contributor.donorESA EO AFRICA R&D Facilityen
cg.coverage.countryEthiopia
cg.coverage.iso3166-alpha2ET
cg.coverage.subregionShilansha Watershed
cg.coverage.subregionRift Valley Basin
cg.creator.identifierAlemseged Tamiru Haile: 0000-0001-8647-2188
cg.creator.identifierWolde Mekuria: 0000-0001-5252-4795
cg.identifier.doihttps://doi.org/10.1016/j.ejrh.2025.102289en
cg.identifier.iwmilibraryH053697
cg.isijournalISI Journalen
cg.issn2214-5818en
cg.journalJournal of Hydrology: Regional Studiesen
cg.reviewStatusPeer Reviewen
cg.volume58en
dc.contributor.authorGedle, Assefaen
dc.contributor.authorRientjes, T.en
dc.contributor.authorHaile, Alemseged Tamiruen
dc.contributor.authorMekuria, Woldeen
dc.contributor.authorHallett, P.en
dc.contributor.authorSmith, J.en
dc.date.accessioned2025-03-27T05:27:37Zen
dc.date.available2025-03-27T05:27:37Zen
dc.identifier.urihttps://hdl.handle.net/10568/173888
dc.titleResponses of surface runoff and soil water-erosion to changes in seasonal land cover and rainfall intensity; the case of Shilansha Watershed, Rift Valley Basin of Ethiopiaen
dcterms.abstractStudy Region: Shilansha is a watershed located in the Upper Bilate River of the Rift Valley Lake Basin in southern Ethiopia. The region experiences extreme soil water-erosion among the greatest rates globally at 498 tons ha- 1 yr- 1 leading to large quantities of sediment accumulation in Lake Abaya. Study Focus: Surface runoff, soil water-erosion, and sediment loads in the region vary with agricultural seasons and rainfall intensities but are often poorly quantified in modeling studies. This study assessed these effects using the event-based physically based distributed open-source Limburg Soil Water Erosion Model (OpenLISEM), incorporating local field data and multi-sensor satellite data processed with machine learning techniques. New Hydrological Insights: During the fallow season, simulated surface runoff and total soil loss were 9.7 % and 47 % larger than the growing season and 0.9 % and 42 % larger than the harvest season, respectively. Compared to moderate intensity, an 87 % increase in high rainfall intensity increased surface runoff by 159 % and soil loss by 295 %, while a 45 % decrease in low rainfall intensity reduced surface runoff by 49 % and soil loss by 85 %. High rainfall intensity had a greater impact when combined with fallow season land cover, while effects were smallest when low rainfall intensity combined with growing season land cover. A calibrated model parameter set for a particular season resulted in deteriorated model performance when applied to other seasons. These findings offer insights on the importance of considering seasonal changes in land cover and rainfall intensity when developing soil and water conservation strategies.en
dcterms.accessRightsOpen Access
dcterms.available2025-03-10
dcterms.bibliographicCitationGedle, Assefa; Rientjes, T.; Haile, Alemseged Tamiru; Mekuria, Wolde; Hallett, P.; Smith, J. 2025. Responses of surface runoff and soil water-erosion to changes in seasonal land cover and rainfall intensity; the case of Shilansha Watershed, Rift Valley Basin of Ethiopia. Journal of Hydrology: Regional Studies, 58:102289. [doi: https://doi.org/10.1016/j.ejrh.2025.102289]en
dcterms.extent102289.en
dcterms.issued2025-04
dcterms.languageen
dcterms.licenseCC-BY-NC-ND-4.0
dcterms.publisherElsevieren
dcterms.subjectrunoffen
dcterms.subjectsoil wateren
dcterms.subjecterosionen
dcterms.subjectland coveren
dcterms.subjectrainfallen
dcterms.subjectwatershedsen
dcterms.subjectsediment loaden
dcterms.subjectmodelsen
dcterms.typeJournal Article

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