Investigating hydro-climates of the upper blue Nile river basin

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dc.contributor.authorJury, Mark
dc.contributor.authorAlaminie, Addis A.
dc.coverage.conferenceissn
dc.date.accessioned2026-03-17T12:57:07Z
dc.date.available2026-03-17T12:57:07Z
dc.date.issued2022
dc.departmentNameGeography and Environmental Studies
dc.description.abstractThe Upper Blue Nile Basin (UBNB) is the main flow contributor to the downstream river. Given the competing demands, we characterize the water balance by statistical analysis of past observations and data assimilation models. UBNB runoff shows a minimal trend (1% of variance) and a large annual cycle (69%) governed by the equatorial trough and Hadley circulation. The diurnal cycle linked to local heat fluxes contrasts with modulation by the slower Pacific El Niño Southern Oscillation and faster Indian Dipole. Using daily measurements over ~25 years, we found that the inflow to Lake Tana (average 48 m³/s) obtains a linear regression fit of r² = 76% with the discharge at Khartoum (average 1380 m³/s) at a lag of +6 days, implying that the small catchment conveys the hydro-climate signal to the entire Nile Basin. The inflow-induced turbidity in Lake Tana was studied using changes in color detected by satellite. Land-use changes in the UBNB were quantified by satellite infrared temperature and aerosol density. Trends in vegetation temperatures showed a +0.2°C/year rise in agricultural zones. Ensemble model-projected trends in runoff are upward and may keep pace with the growing demand for Nile water.
dc.facultyFaculty of Science, Agriculture and Engineering
dc.identifier.citationAlaminie, A.A. and Jury, M.R. 2022. Investigating hydro-climates of the Upper Blue Nile River Basin. Hydrological Sciences Journal, 67(2), pp.248-262.
dc.identifier.issn2150-3435 (online)
dc.identifier.issn0262-6667 (print)
dc.identifier.otherhttps://doi.org/10.1080/02626667.2021.2011892
dc.identifier.urihttp://hdl.handle.net/10530/58975
dc.inproceedingsissn
dc.issuenumber67 / 2
dc.keynoteissn
dc.language.isoEnglish
dc.pages248 - 262
dc.peerreviewedYes
dc.publisherTaylor & Francis
dc.subjectBlue Nile
dc.subjectHydrology
dc.subjectEthiopia highlands
dc.subjectClimatic trends
dc.titleInvestigating hydro-climates of the upper blue Nile river basin
dc.title.journalHydrological Sciences Journal
dc.typeJournal Article
dspace.entity.typePublication
relation.isAuthorOfPublication5cd85581-94a9-4d3c-8f3c-9fda7af2bc31
relation.isAuthorOfPublication.latestForDiscovery5cd85581-94a9-4d3c-8f3c-9fda7af2bc31
relation.isOrgUnitOfPublication34b1a075-2442-41e5-bb66-ac93a4c9cde0
relation.isOrgUnitOfPublication.latestForDiscovery34b1a075-2442-41e5-bb66-ac93a4c9cde0
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