Identification of hydrologically homogenous watersheds and climate-vegetation dynamics in the Blue Nile Basin of Ethiopia

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cg.contributor.affiliationInternational Center for Agricultural Research in the Dry Areas
cg.contributor.affiliationUniversity of Kiel
cg.contributor.affiliationAssosa University
cg.contributor.affiliationBahir Dar University, Faculty of Civil and Water Resources Engineering
cg.contributor.initiativeLivestock and Climate
cg.coverage.countryEthiopia
cg.coverage.iso3166-alpha2ET
cg.coverage.regionEastern Africa
cg.creator.identifierAbeyou, Abeyou: 0000-0002-7990-8446
cg.identifier.doihttps://doi.org/10.2166/nh.2024.098
cg.isijournalISI Journal
cg.issn1998-9563
cg.issue3
cg.journalHydrology Research
cg.reviewStatusPeer Review
cg.subject.actionAreaResilient Agrifood Systems
cg.subject.impactAreaNutrition, health and food security
cg.subject.impactAreaGender equality, youth and social inclusion
cg.subject.impactAreaEnvironmental health and biodiversity
cg.subject.sdgSDG 2 - Zero hunger
cg.subject.sdgSDG 6 - Clean water and sanitation
cg.subject.sdgSDG 13 - Climate action
cg.subject.sdgSDG 15 - Life on land
cg.volume55
dc.contributor.authorMihret, Temesgen
dc.contributor.authorZimale, Fasikaw A
dc.contributor.authorAbeyou, Abeyou
dc.contributor.authorD. Ayalew, Ayenew
dc.contributor.authorFohrer, Nicola
dc.date.accessioned2025-01-15T15:49:37Zen
dc.date.available2025-01-15T15:49:37Zen
dc.identifier.urihttps://hdl.handle.net/10568/169119
dc.titleIdentification of hydrologically homogenous watersheds and climate-vegetation dynamics in the Blue Nile Basin of Ethiopiaen
dcterms.abstractIdentification of hydrologically homogenous watersheds in the Upper Blue Nile Basin of Ethiopia is challenging due to the large number of watersheds and the lack of consistent and reliable data. Traditional methods, such as expert-based classification, are time-consuming, subjective, and often not reproducible. Therefore, this study aims to identify homogenous gauged watersheds using hydrometeorological and remote sensing data. In this study 76 watersheds were delineated from a 30-m digital elevation model (SRTM-DEM). Twelve watershed characteristics were selected to aid the classification process. Three homogenous climate regions were identified using rainfall data from 42 stations, and for each homogeneous climate region, gauged watersheds were identified. Principal component analysis (PCA) and K-means clustering were used for classification. The PCA reduced 12 watershed characteristics into three principal components using a threshold of 80% accounted variance and eigenvalues greater than one. K-means clustering classified the 76 watersheds into nine homogenous clusters. In the classified regions, vegetation dynamics within three decades have also been analyzed. This helped identify trends in vegetation cover and its spatial and temporal dynamics. The results of the investigation will potentially be used for runoff prediction of ungauged watersheds and for water resource management models in the future.en
dcterms.accessRightsOpen Access
dcterms.available2024-02-13
dcterms.bibliographicCitationTemesgen Mihret, Fasikaw A Zimale, Abeyou Abeyou, Ayenew D. Ayalew, Nicola Fohrer. (1/3/2024). Identification of hydrologically homogenous watersheds and climate-vegetation dynamics in the Blue Nile Basin of Ethiopia. Hydrology Research, 55 (3), pp. 280-300.en
dcterms.extent280-300
dcterms.formatPDFen
dcterms.issued2024-03-01
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherIWA Publishing
dcterms.subjectprincipal component analysisen
dcterms.subjectblue nile basinen
dcterms.subjecthomogeneous watershedsen
dcterms.subjectk-means clusteringen
dcterms.subjectprincipal componenten
dcterms.subjectremote sensing indicesen
dcterms.subjectvegetation dynamicsen
dcterms.typeJournal Article

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