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dc.contributorIbrakhimov, Mirzakhayoten_US
dc.contributorBenli, Bogachanen_US
dc.contributorLamers, Johannesen_US
dc.contributorLiaqat, Umar Waqasen_US
dc.creatorAwan, Usmanen_US
dc.identifier.citationUsman Awan, Mirzakhayot Ibrakhimov, Bogachan Benli, Johannes Lamers, Umar Waqas Liaqat. (6/9/2016). A new concept of irrigation response units for effective management of surface and groundwater resources: a case study from the multi‑country Fergana Valley, Central Asia. Irrigation Science, 35 (1), pp. 55-68.en_US
dc.description.abstractWhen estimating canal water supplies for largescale irrigation schemes and especially in arid regions worldwide, the impact of all factors affecting the gross irrigation requirements (GIR) are not properly accounted for, which results in ineffcient use of precious freshwater resources. This research shows that the concept of irrigation response units (IRU)—areas having unique combinations of factors effecting the GIR—allows for more precise estimates of GIR. An overlay analysis of soil texture and salinity, depth and salinity of groundwater, cropping patterns and irrigation methods was performed in a GIS environment, which yielded a total of 17 IRUs combinations of the Oktepa Zilol Chashmasi water consumers’ association in multi-country Fergana Valley, Central Asia. Groundwater contribution, leaching requirements, losses in the irrigation system through feld application and conveyance and effective rainfall were included in GIR estimates. The GIR varied signifcantly among IRUs [average of 851 mm (±143 mm)] with a maximum (1051 mm) in IRU-12 and a minimum (629 mm) in IRUs-15, 16. Owing to varying groundwater levels in each IRU, the groundwater contribution played a key role in the estimation of the GIR. The maximum groundwater contribution occurred in IRUs dominated by cotton–fallow rotations as evidenced by an average value of 159 mm but a maximum of 254 mm and a minimum of 97 mm. Percolation losses depended on irrigation methods for different crops in their respective IRUs. The novel approach can guide water managers in this and similar regions to increase the accuracy of irrigation demands based on all the factor effecting the GIR.en_US
dc.publisherSpringer Verlag (Germany)en_US
dc.sourceIrrigation Science;35,(2016) Pagination 55-68en_US
dc.titleA new concept of irrigation response units for effective management of surface and groundwater resources: a case study from the multi‑country Fergana Valley, Central Asiaen_US
dc.typeJournal Articleen_US
cg.creator.idAwan, Usman: 0000-0001-8663-5688en_US
cg.subject.agrovocclimate changeen_US
cg.subject.agrovocclimate change adaptationen_US
cg.subject.agrovocclimate change mitigationen_US
cg.subject.agrovocwater managementen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerKhorezm Rural Advisory Support Service - KRASSen_US
cg.contributor.centerUniversity of Bonn, Center for Development Research - Uni-Bonn - ZEFen_US
cg.contributor.centerHanyang Universityen_US
cg.contributor.crpCGIAR Research Program on Water, Land and Ecosystems - WLEen_US
cg.contributor.funderInternational Water Management Institute - IWMIen_US
cg.contributor.projectCGIAR Research Program on WLE (CRP 5) - WI/W2 Fundingen_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.regionCentral Asiaen_US
cg.isijournalISI Journalen_US
dc.identifier.statusLimited accessen_US
cg.journalIrrigation Scienceen_US

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