Towards the harmonization of global environmental flow estimates: comparing the Global Environmental Flow Information System (GEFIS) with country data

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dc.creatorEriyagama, Nishadi
dc.creatorMessager, M. L.
dc.creatorDickens, Chris
dc.creatorTharme, R.
dc.creatorStassen, R.
dc.date2024-02-07
dc.date2024-02-08T05:59:23Z
dc.date2024-02-08T05:59:23Z
dc.date.accessioned2026-06-27T18:30:40Z
dc.descriptionThe source of data used to estimate the e-flow requirement in Sustainable Development Goal (SDG) Indicator 6.4.2 (level of water stress: freshwater withdrawal as a proportion of available freshwater resources) is the Global Environmental Flow Information System (GEFIS), an online tool produced and managed by the International Water Management Institute (IWMI). In addition to the GEFIS estimate, the Food and Agriculture Organization of the United Nations (FAO), as the custodians of the SDG indicator, encourages countries to put forward their locally determined e-flow estimates, especially if it differs from the GEFIS estimate. To date, however, only a few countries have taken up this opportunity. The aim of this report is to compare e-flows estimated by GEFIS with independent e-flow assessments performed at the local level to gauge the level of agreement between the two sets of estimates. We compared e-flow estimates from GEFIS to local e-flow estimates at 533 river sites.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/139064
dc.identifier.urihttp://hdl.handle.net/123456789/158026
dc.languageen
dc.publisherInternational Water Management Institute
dc.rightsOpen Access
dc.sourceEriyagama, Nishadi; Messager, M. L.; Dickens, Chris; Tharme, R.; Stassen, R. 2024. Towards the harmonization of global environmental flow estimates: comparing the Global Environmental Flow Information System (GEFIS) with country data. Colombo, Sri Lanka: International Water Management Institute (IWMI). 53p. (IWMI Research Report 186) [doi: https://doi.org/10.5337/2024.204]
dc.subjectenvironmental flows
dc.subjectestimation
dc.subjectinformation systems
dc.subjecthydrological data
dc.subjectdatabases
dc.subjectcomparisons
dc.subjectassessment
dc.subjectsustainable development goals
dc.subjectgoal 6 clean water and sanitation
dc.subjectfreshwater
dc.subjectwater resources
dc.subjectwater stress
dc.subjectrivers
dc.subjectstream flow
dc.subjectrunoff
dc.subjectaquatic ecosystems
dc.subjecthabitats
dc.subjectecological factors
dc.subjectcatchment areas
dc.subjectland cover
dc.subjectdrainage area
dc.subjecthydrological modelling
dc.subjecttools
dc.subjecttime series analysis
dc.subjectheterogeneity
dc.subjectindicators
dc.subjectindexes
dc.titleTowards the harmonization of global environmental flow estimates: comparing the Global Environmental Flow Information System (GEFIS) with country data
dc.typeReport

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