Page 88 - 《水资源与水工程学报》2022年第6期
P. 88
! 33 " ! 6 # & ' ( ) & * + , - Vol.33No.6
2022 $ 12 % JournalofWaterResources&WaterEngineering Dec.,2022
DOI:10.11705/j.issn.1672-643X.2022.06.11
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KLDMN:P467 OPQRS:A OTUN:1672643X(2022)060084011
Characteristicsandfuturepredictionofextremeprecipitationinthe
middleandupperreachesofWujiangRiver
FENGYelin,JIAOShulin,HEZhonghua,YANGLiuying
(SchoolofGeographyandEnvironmentalScience,GuizhouNormalUniversity,Guiyang550025,China)
Abstract:BasedonthedailyprecipitationdataofthemiddleandupperreachesoftheWujiangRiver
from1961to2019,thespatiotemporalcharacteristicsofextremeprecipitationwerestudiedusingtrenda
nalysis ,EOFandwaveletanalysis.Atthesametime,inordertomakethestudyholistic,threescenarios
(SSP126,SSP245andSSP585)underfiveGCMsinCMIP6wereusedtoestimatefutureprecipitation
changes(2020-2100)afterdownscaling.Theresultsshowthattheextremeprecipitationhasincreased
anddecreasedinthepast59yearswithinsignificantchanges.Intermsofthechangecycles ,thecycleof
strongsignalmainlyconcentratedonthetimescaleof23-30aandranthroughthewholetimeseries.In
thefirstmode ,thechangesofthefiveextremeprecipitationindiceswereconsistentspatially,butdiffer
entiatedinthesecondmode.Ingeneral,thefutureextremeprecipitationeventswillincreasewiththein
creaseofSSPscenarios,andthetrendismainlypositive.Theresearchresultscanprovidesomereference
forwatersecuritycontrol ,planningandconstruction,disasterpreventionandmitigationintheWujiang
RiverBasin.
Keywords:extremeprecipitationevent;extremeprecipitationindex;precipitationprediction;Coupled
ModelIntercomparisonProjectPhase6 (CMIP6);globalclimatemodels(GCMs);themiddleandupper
reachesofWujiangRiver
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