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_US
cg.contributor.affiliationUniversity of Oxforden_US
cg.contributor.affiliationUniversity of Lausanneen_US
cg.contributor.affiliationVrije Universiteit Brusselen_US
cg.contributor.affiliationIHE Delft Institute for Water Educationen_US
cg.contributor.affiliationUniversity of Bernen_US
cg.contributor.donorSwiss National Science Foundationen_US
cg.contributor.donorSwiss Government Excellence Scholarshipen_US
cg.coverage.countryBeninen_US
cg.coverage.countryBurkina Fasoen_US
cg.coverage.countryCôte d'Ivoireen_US
cg.coverage.countryGhanaen_US
cg.coverage.countryMalien_US
cg.coverage.countryTogoen_US
cg.coverage.iso3166-alpha2BJen_US
cg.coverage.iso3166-alpha2BFen_US
cg.coverage.iso3166-alpha2CIen_US
cg.coverage.iso3166-alpha2GHen_US
cg.coverage.iso3166-alpha2MLen_US
cg.coverage.iso3166-alpha2TGen_US
cg.coverage.regionWestern Africaen_US
cg.coverage.subregionVolta River Basinen_US
cg.creator.identifierMoctar Dembélé: 0000-0002-0689-2033en_US
cg.creator.identifierSander J. Zwart: 0000-0002-5091-1801en_US
cg.identifier.doihttps://doi.org/10.1016/j.jhydrol.2023.130092en_US
cg.identifier.iwmilibraryH052224en_US
cg.isijournalISI Journalen_US
cg.issn0022-1694en_US
cg.journalJournal of Hydrologyen_US
cg.reviewStatusPeer Reviewen_US
cg.river.basinVOLTAen_US
cg.volume626en_US
dc.contributor.authorDembélé, Moctaren_US
dc.contributor.authorSalvadore, E.en_US
dc.contributor.authorZwart, Sander J.en_US
dc.contributor.authorCeperley, N.en_US
dc.contributor.authorMariethoz, G.en_US
dc.contributor.authorSchaefli, B.en_US
dc.date.accessioned2023-09-25T03:04:16Zen_US
dc.date.available2023-09-25T03:04:16Zen_US
dc.identifier.urihttps://hdl.handle.net/10568/131983en_US
dc.titleWater accounting under climate change in the transboundary Volta River Basin with a spatially calibrated hydrological modelen_US
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_US
dcterms.accessRightsOpen Accessen_US
dcterms.available2023-08-26en_US
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_US
dcterms.extent626(Part A):130092. (Online first)en_US
dcterms.issued2023-11en_US
dcterms.languageenen_US
dcterms.licenseCC-BY-4.0en_US
dcterms.publisherElsevieren_US
dcterms.subjectwater accountingen_US
dcterms.subjectclimate changeen_US
dcterms.subjecttransboundary watersen_US
dcterms.subjectriver basinsen_US
dcterms.subjecthydrological modellingen_US
dcterms.subjectwater balanceen_US
dcterms.subjectwater resourcesen_US
dcterms.subjectwater managementen_US
dcterms.subjectsustainabilityen_US
dcterms.subjectwater availabilityen_US
dcterms.subjectwater useen_US
dcterms.subjectclimate modelsen_US
dcterms.subjectevaporationen_US
dcterms.subjectland coveren_US
dcterms.subjectland useen_US
dcterms.subjectrunoffen_US
dcterms.subjectclimatic zonesen_US
dcterms.typeJournal Articleen_US

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