Establishing irrigation potential of a hillside aquifer in the African highlands

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cg.contributor.affiliationInternational Water Management Instituteen_US
cg.contributor.crpWater, Land and Ecosystemsen_US
cg.coverage.countryEthiopiaen_US
cg.coverage.iso3166-alpha2ETen_US
cg.coverage.regionAfricaen_US
cg.coverage.regionEastern Africaen_US
cg.creator.identifierSeifu Tilahun: 0000-0002-5219-4527en_US
cg.creator.identifierSimon Langan: 0000-0003-0742-3658en_US
cg.identifier.doihttps://doi.org/10.1002/hyp.13659en_US
cg.identifier.iwmilibraryH049535en_US
cg.identifier.wlethemeLand and Water Solutionsen_US
cg.isijournalISI Journalen_US
cg.issn0885-6087en_US
cg.issue8en_US
cg.journalHydrological Processesen_US
cg.reviewStatusPeer Reviewen_US
cg.volume34en_US
dc.contributor.authorTilahun, Seifu A.en_US
dc.contributor.authorYilak, Debebe L.en_US
dc.contributor.authorSchmitter, Petra S.en_US
dc.contributor.authorZimale, Fasikaw A.en_US
dc.contributor.authorLangan, Simon J.en_US
dc.contributor.authorBarron, Jennieen_US
dc.contributor.authorParlange, Jean-Yvesen_US
dc.contributor.authorSteenhuis, Tammo S.en_US
dc.date.accessioned2020-03-06T08:30:40Zen_US
dc.date.available2020-03-06T08:30:40Zen_US
dc.identifier.urihttps://hdl.handle.net/10568/107399en_US
dc.titleEstablishing irrigation potential of a hillside aquifer in the African highlandsen_US
dcterms.abstractFeeding 9 billion people in 2050 will require sustainable development of all water resources, both surface and subsurface. Yet, little is known about the irrigation potential of hillside shallow aquifers in many highland settings in sub-Saharan Africa that are being considered for providing irrigation water during the dry monsoon phase for smallholder farmers. Information on the shallow groundwater being available in space and time on sloping lands might aid in increasing food production in the dry monsoon phase. Therefore, the research objective of this work is to estimate potential groundwater storage as a potential source of irrigation water for hillside aquifers where lateral subsurface flow is dominant. The research was carried out in the Robit Bata experimental watershed in the Lake Tana basin which is typical of many undulating watersheds in the Ethiopian highlands. Farmers have excavated more than 300 hand dug wells for irrigation. We used 42 of these wells to monitor water table fluctuation from April 16, 2014 to December 2015. Precipitation and runoff data were recorded for the same period. The temporal groundwater storage was estimated using two methods: one based on the water balance with rainfall as input and baseflow and evaporative losses leaving the watershed as outputs; the second based on the observed rise and fall of water levels in wells. We found that maximum groundwater storage was at the end of the rain phase in September after which it decreased linearly until the middle of December due to short groundwater retention times. In the remaining part of the dry season period, only wells located close to faults contained water. Thus, without additional water sources, sloping lands can only be used for significant irrigation inputs during the first 3 months out of the 8 months long dry season.en_US
dcterms.accessRightsOpen Accessen_US
dcterms.available2020-02-08en_US
dcterms.bibliographicCitationTilahun, S. A.; Yilak, D. L.; Schmitter, Petra; Zimale, F. A.; Langan, Simon; Barron, Jennie; Parlange, J.-Y.; Steenhuis, T. S. 2020. Establishing irrigation potential of a hillside aquifer in the African highlands. Hydrological Processes, 34(8):1741-1753. doi: 10.1002/hyp.13659en_US
dcterms.extent1741-1753en_US
dcterms.issued2020-04-15en_US
dcterms.languageenen_US
dcterms.licenseCC-BY-4.0en_US
dcterms.publisherWileyen_US
dcterms.subjectaquifersen_US
dcterms.subjecthighlandsen_US
dcterms.subjectsloping landen_US
dcterms.subjectgroundwater tableen_US
dcterms.subjectgroundwater rechargeen_US
dcterms.subjectirrigation wateren_US
dcterms.subjectwellsen_US
dcterms.subjectwater budgeten_US
dcterms.subjectwater storageen_US
dcterms.subjectwater availabilityen_US
dcterms.subjectwater levelsen_US
dcterms.subjecthydrometeorologyen_US
dcterms.subjectmonitoringen_US
dcterms.subjectinfiltrationen_US
dcterms.subjectrunoffen_US
dcterms.subjectdischargesen_US
dcterms.subjectrainen_US
dcterms.subjectwatershedsen_US
dcterms.subjectsmall scale systemsen_US
dcterms.subjectmodelsen_US
dcterms.subjectfarmer-led irrigationen_US
dcterms.typeJournal Articleen_US

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