Climate change impacts on conventional and flash droughts in the Mekong River Basin

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dc.contributor.authorKang, Hyunwooen
dc.contributor.authorSridhar, Venkataramanaen
dc.contributor.authorAli, Syed A.en
dc.date.accessioned2023-06-16T12:13:48Zen
dc.date.available2023-06-16T12:13:48Zen
dc.date.issued2022-09-10en
dc.date.updated2023-06-15T16:25:52Zen
dc.description.abstractRecent drought events in the Mekong River Basin (MRB) have resulted in devastating environmental and economic losses, and climate change and human-induced alterations have exacerbated drought conditions. Using hydrologic models and multiple climate change scenarios, this study quantified the future climate change impacts on conventional and flash drought conditions in the MRB. The Soil and Water Assessment Tool (SWAT) and Variable Infiltration Capacity (VIC) models were applied to estimate long-term drought indices for conventional and flash drought conditions over historical and future periods (1966–2099), using two emission scenarios (RCP 4.5 and RCP8.5), and four climate models from the Coupled Model Intercomparison Project Phase 5 (CMIP5). For the conventional drought assessment, monthly scale drought indices were estimated, and pentad-scale (5 days) drought indices were computed for the flash drought evaluations. There were overall increases in droughts from the SWAT model for the conventional drought conditions and overall decreases from the VIC model. For the flash drought conditions, the SWAT-driven drought indices showed overall increases in drought occurrences (up to 165%). On the contrary, the VIC-driven drought indices presented decreases in drought occurrences (up to −44%). The conventional and flash drought evaluations differ between these models as they partition the water budget, specifically soil moisture differently. We conclude that the proposed framework, which includes hydrologic models, various emission scenarios, and projections, allows us to assess the various perspectives on drought conditions. Basin countries have differential impacts, so targeted future adaptation strategy is required.en
dc.description.versionAccepted versionen
dc.format.mimetypeapplication/pdfen
dc.identifier155845 (Article number)en
dc.identifier.doihttps://doi.org/10.1016/j.scitotenv.2022.155845en
dc.identifier.eissn1879-1026en
dc.identifier.issn0048-9697en
dc.identifier.issuePt 2en
dc.identifier.orcidSridhar, Venkataramana [0000-0002-1003-2247]en
dc.identifier.otherS0048-9697(22)02942-4 (PII)en
dc.identifier.pmid35561902en
dc.identifier.urihttp://hdl.handle.net/10919/115445en
dc.identifier.volume838en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urihttps://www.ncbi.nlm.nih.gov/pubmed/35561902en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectClimate changeen
dc.subjectFlash droughtsen
dc.subjectMekongen
dc.subjectModelingen
dc.subjectSWATen
dc.subjectSoil moistureen
dc.subjectVICen
dc.subject13 Climate Actionen
dc.subject.meshHumansen
dc.subject.meshWateren
dc.subject.meshSoilen
dc.subject.meshRiversen
dc.subject.meshDroughtsen
dc.subject.meshClimate Changeen
dc.titleClimate change impacts on conventional and flash droughts in the Mekong River Basinen
dc.title.serialScience of the Total Environmenten
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherJournal Articleen
dcterms.dateAccepted2022-05-06en
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciencesen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/Biological Systems Engineeringen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/CALS T&R Facultyen

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