Streamflow variability and its linkage to ENSO events in the Ethiopian Rift Valley Lakes Basin

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cg.coverage.countryEthiopia
cg.coverage.iso3166-alpha2ET
cg.coverage.regionEastern Africa
cg.coverage.subregionRift Valley Lakes Basin
cg.creator.identifierAlemseged Tamiru Haile: 0000-0001-8647-2188en
cg.creator.identifierMeron Teferi Taye: 0000-0002-4687-4622en
cg.identifier.doihttps://doi.org/10.1016/j.ejrh.2021.100817en
cg.identifier.iwmilibraryH050726en
cg.isijournalISI Journalen
cg.issn2214-5818en
cg.journalJournal of Hydrology: Regional Studiesen
cg.reviewStatusPeer Reviewen
cg.volume35en
dc.contributor.authorWorako, A. W.en
dc.contributor.authorHaile, Alemseged Tamiruen
dc.contributor.authorTaye, Meron Teferien
dc.date.accessioned2021-10-31T16:50:20Zen
dc.date.available2021-10-31T16:50:20Zen
dc.identifier.urihttps://hdl.handle.net/10568/115753
dc.titleStreamflow variability and its linkage to ENSO events in the Ethiopian Rift Valley Lakes Basinen
dcterms.abstractStudy Region: The Ethiopian Rift Valley Lakes basin is found in the main Ethiopian Rift Valley system. Study Focus: Understanding the hydrological impact of El Niño-Southern Oscillation (ENSO) is of a paramount importance for society since it substantially affects the environmental and socio-economic conditions. The relation between ENSO indicators (SOI, MEI and Niño3.4) and streamflow magnitude was statistically evaluated with partial correlation, cross correlation, extreme streamflow indices and streamflow deficits to provide empirical evidence on how ENSO phases (La Niña and El Niño) affect streamflow variability. Trends of streamflow and ENSO indicators were tested using the non-parametric Mann-Kendall test. New Hydrological Insights for the Region: Our findings indicate that the partial correlation between the catchment area and ENSO effect on streamflow were not statistically significant at p < 0.05 after removing the south-north gradient. The direction of the ENSO effect is spatially inconsistent since El Niño (La Niña) causes positive deviation in some catchments and negative deviation for other catchments. Though statistically insignificant, reduced flow is detected for many catchments during El Niño years. For most catchment, the extreme high flow has a larger magnitude during La Niña than El Niño whereas the extreme low flow has a larger magnitude during El Niño than La Niña years. Overall, the relationship between ENSO and streamflow of the study area is found spatially inconsistent and statistically insignificant for most catchments.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationWorako, A. W.; Haile, Alemseged Tamiru; Taye, Meron Teferi. 2021. Streamflow variability and its linkage to ENSO events in the Ethiopian Rift Valley Lakes Basin. Journal of Hydrology: Regional Studies, 35:100817. [doi: https://doi.org/10.1016/j.ejrh.2021.100817]en
dcterms.extent35:100817en
dcterms.issued2021-06en
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherElsevieren
dcterms.subjectstream flowen
dcterms.subjectriver basinsen
dcterms.subjectel nino-southern oscillationen
dcterms.subjecthydrologyen
dcterms.subjectindicatorsen
dcterms.subjecttrendsen
dcterms.subjectcatchment areasen
dcterms.subjectwatershedsen
dcterms.subjectclimate changeen
dcterms.typeJournal Article

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