Water accounting under climate change in the transboundary Volta River Basin with a spatially calibrated hydrological model

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cg.contributor.affiliationInternational Water Management Instituteen
cg.contributor.affiliationUniversity of Oxforden
cg.contributor.affiliationUniversity of Lausanneen
cg.contributor.affiliationVrije Universiteit Brusselen
cg.contributor.affiliationIHE Delft Institute for Water Educationen
cg.contributor.affiliationUniversity of Bernen
cg.contributor.donorSwiss National Science Foundationen
cg.contributor.donorSwiss Government Excellence Scholarshipen
cg.coverage.countryBenin
cg.coverage.countryBurkina Faso
cg.coverage.countryCôte d'Ivoire
cg.coverage.countryGhana
cg.coverage.countryMali
cg.coverage.countryTogo
cg.coverage.iso3166-alpha2BJ
cg.coverage.iso3166-alpha2BF
cg.coverage.iso3166-alpha2CI
cg.coverage.iso3166-alpha2GH
cg.coverage.iso3166-alpha2ML
cg.coverage.iso3166-alpha2TG
cg.coverage.regionWestern Africa
cg.coverage.subregionVolta River Basin
cg.creator.identifierMoctar Dembélé: 0000-0002-0689-2033en
cg.creator.identifierSander J. Zwart: 0000-0002-5091-1801en
cg.identifier.doihttps://doi.org/10.1016/j.jhydrol.2023.130092en
cg.identifier.iwmilibraryH052224en
cg.isijournalISI Journalen
cg.issn0022-1694en
cg.journalJournal of Hydrologyen
cg.reviewStatusPeer Reviewen
cg.river.basinVOLTAen
cg.volume626en
dc.contributor.authorDembélé, Moctaren
dc.contributor.authorSalvadore, E.en
dc.contributor.authorZwart, Sander J.en
dc.contributor.authorCeperley, N.en
dc.contributor.authorMariethoz, G.en
dc.contributor.authorSchaefli, B.en
dc.date.accessioned2023-09-25T03:04:16Zen
dc.date.available2023-09-25T03:04:16Zen
dc.identifier.urihttps://hdl.handle.net/10568/131983
dc.titleWater accounting under climate change in the transboundary Volta River Basin with a spatially calibrated hydrological modelen
dcterms.abstractSustainable water management requires evidence-based information on the current and future states of water resources. This study presents a comprehensive modelling framework that integrates the fully distributed mesoscale Hydrologic Model (mHM) and climate change scenarios with the Water Accounting Plus (WA+) tool to anticipate future water resource challenges and provide mitigation measures in the transboundary Volta River basin (VRB) in West Africa. The mHM model is forced with a large ensemble of climate change projection data from CORDEX-Africa. Outputs from mHM are used as inputs to the WA+ framework to report on water flows and consumption over the historical baseline period 1991–2020 and the near-term future 2021–2050 at the basin scale, and also across spatial domains including four climatic zones, four sub-basins and six riparian countries. The long-term multi-model ensemble mean of the net inflow to the basin is found to be 419 km3 /year with an inter-annual variability of 11% and is projected to slightly increase in the near-term future (2021–2050). However, evaporation consumes most of the net inflow, with only 8% remaining as runoff. About 4 km3 /year of water is currently used for man-made activities. Only 45% of the available water is beneficially consumed, with the agricultural sector representing 34% of the beneficial water consumption. Water availability is projected to increase in the future due to the increase in rainfall, along with higher inter-model and inter-annual variabilities, thereby highlighting the need for adaptation strategies. These findings and the proposed climate-resilient land and water management strategies can help optimize the water-energy-food-ecosystem nexus and support evidence-based decisions and policy-making for sustainable water management in the VRB.en
dcterms.accessRightsOpen Access
dcterms.available2023-08-26en
dcterms.bibliographicCitationDembele, Moctar; Salvadore, E.; Zwart, Sander; Ceperley, N.; Mariethoz, G.; Schaefli, B. 2023. Water accounting under climate change in the transboundary Volta River Basin with a spatially calibrated hydrological model. Journal of Hydrology, 626(Part A):130092. (Online first) [doi: https://doi.org/10.1016/j.jhydrol.2023.130092]en
dcterms.extent626(Part A):130092. (Online first)en
dcterms.issued2023-11en
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherElsevieren
dcterms.subjectwater accountingen
dcterms.subjectclimate changeen
dcterms.subjecttransboundary watersen
dcterms.subjectriver basinsen
dcterms.subjecthydrological modellingen
dcterms.subjectwater balanceen
dcterms.subjectwater resourcesen
dcterms.subjectwater managementen
dcterms.subjectsustainabilityen
dcterms.subjectwater availabilityen
dcterms.subjectwater useen
dcterms.subjectclimate modelsen
dcterms.subjectevaporationen
dcterms.subjectland coveren
dcterms.subjectland useen
dcterms.subjectrunoffen
dcterms.subjectclimatic zonesen
dcterms.typeJournal Article

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