Adaptation to climate variability in Sri Lanka: a case study of the Huruluwewa Irrigation System in the Dry Zone

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cg.contributor.crpWater, Land and Ecosystems
cg.contributor.donorMinistry of Agriculture, Forestry and Fisheries, Japanen
cg.coverage.countryIndia
cg.coverage.countrySri Lanka
cg.coverage.iso3166-alpha2IN
cg.coverage.iso3166-alpha2LK
cg.coverage.regionSouthern Asia
cg.coverage.subregionNorth Central Province
cg.coverage.subregionHuruluwewa Irrigation System
cg.coverage.subregionSina Irrigation System
cg.creator.identifierUpali Amarasinghe: 0000-0002-0088-0648
cg.creator.identifierGiriraj Amarnath: 0000-0002-7390-9800
cg.creator.identifierNiranga Alahacoon: 0000-0003-0984-5176
cg.creator.identifierMohamed Aheeyar: 0000-0002-2117-0602
cg.creator.identifierKiran M C: 0000-0002-5686-2334
cg.creator.identifierSurajit Ghosh: 0000-0002-3928-2135
cg.creator.identifierToru Nakada: 0000-0003-3757-0210
cg.identifier.doihttps://doi.org/10.5337/2021.229en
cg.identifier.iwmilibraryH050737
cg.isbn978-92-9090-931-6en
cg.issn2012-576en
cg.issn2478-1134en
cg.placeColombo, Sri Lankaen
dc.contributor.authorAmarasinghe, Upali A.en
dc.contributor.authorAmarnath, Girirajen
dc.contributor.authorAlahacoon, Nirangaen
dc.contributor.authorAheeyar, Mohamed M.M.en
dc.contributor.authorChandrasekharan, Kiran M.en
dc.contributor.authorGhosh, Surajiten
dc.contributor.authorNakada, Toruen
dc.date.accessioned2021-11-09T18:38:14Zen
dc.date.available2021-11-09T18:38:14Zen
dc.identifier.urihttps://hdl.handle.net/10568/115928
dc.titleAdaptation to climate variability in Sri Lanka: a case study of the Huruluwewa Irrigation System in the Dry Zoneen
dcterms.abstractThis paper assesses how the Huruluwewa tank (HWT) irrigation system in the North Central Province of Sri Lanka adapts to climate variability. The lessons learned in the HWT will be helpful for many water-scarce irrigation systems in the country, which bear high climate risks. Recurrent droughts are the bane of agriculture in the Dry Zone, comprising three-fourths of the land area spread over the Northern, North Central and Eastern provinces. In the HWT, the fifteenth largest canal irrigation system in the country, adaptation to climate variability happens on several fronts: changes made by the irrigation management to the water release regime; changes in the cropping patterns practiced by farmers in the command area; and the use of groundwater, which is recharged from rainfall, reservoir storage and canal irrigation, as supplemental irrigation. Such adaptation measures ensure that the available water supply in the reservoir is adequate for 100% cropping intensity over two cropping seasons, even in drought years, and enhances economic water productivity in terms of value per unit of consumptive water use. Moreover, irrigation management should consider groundwater recharge through canal irrigation as a resource, which brings substantial agricultural and economic benefits not only for the command area but also outside the command area. The adaptation patterns implemented in HWT demonstrate how water-scarce irrigation systems can achieve higher economic water productivity, i.e., generate ‘more income per drop’ to enhance climate resilience for people in and outside the canal command areas.en
dcterms.accessRightsOpen Access
dcterms.available2021
dcterms.bibliographicCitationAmarasinghe, Upali A.; Amarnath, Giriraj; Alahacoon, Niranga; Aheeyar, Mohamed; Chandrasekharan, Kiran; Ghosh, Surajit; Nakada, Toru. 2021. Adaptation to climate variability in Sri Lanka: a case study of the Huruluwewa Irrigation System in the Dry Zone. Colombo, Sri Lanka: International Water Management Institute (IWMI). 30p. (IWMI Working Paper 200) [doi: https://doi.org/10.5337/2021.229]en
dcterms.extent30p.en
dcterms.isPartOfIWMI Working Paper 200en
dcterms.issued2021-11-09
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherInternational Water Management Instituteen
dcterms.subjectclimate variabilityen
dcterms.subjectclimate change adaptationen
dcterms.subjectirrigation systemsen
dcterms.subjectarid zonesen
dcterms.subjecttank irrigationen
dcterms.subjectirrigation canalsen
dcterms.subjectirrigation managementen
dcterms.subjectland useen
dcterms.subjectcropping patternsen
dcterms.subjectwater supplyen
dcterms.subjectwater depletionen
dcterms.subjectcrop productionen
dcterms.subjectwater use efficiencyen
dcterms.subjectirrigation efficiencyen
dcterms.subjectwater productivityen
dcterms.subjectwater availabilityen
dcterms.subjectdroughten
dcterms.subjectrainfall patternsen
dcterms.subjectrisken
dcterms.subjectresilienceen
dcterms.subjectwater scarcityen
dcterms.subjectwater managementen
dcterms.subjectreservoirsen
dcterms.subjectwater spreadingen
dcterms.subjectcatchment areasen
dcterms.subjectwater storageen
dcterms.subjectgroundwater rechargeen
dcterms.subjectwater accountingen
dcterms.subjectwater policiesen
dcterms.subjectseasonal croppingen
dcterms.subjectdiversificationen
dcterms.subjectcrop water useen
dcterms.subjectconsumptive useen
dcterms.subjectfarmersen
dcterms.subjectfarm incomeen
dcterms.subjectremote sensingen
dcterms.subjectgeographical information systemsen
dcterms.subjectcase studiesen
dcterms.typeWorking Paper

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