Page 79 - 《水资源与水工程学报》2024年第6期
P. 79
!35 "!6 # & ' ( ) & * + , - Vol.35No.6
2024 $ 12 % JournalofWaterResources&WaterEngineering Dec.,2024
DOI:10.11705/j.issn.1672-643X.2024.06.08
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1 1 1 2 2
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3IJKL:TV213.4;P426.6 MNOPQ:A MRSL:1672643X(2024)06007513
WRFsimulationofheavyraininWanzhousectionofthe
ThreeGorgesReservoirarea
1
2
1
1
2
SHIRuibo,ZHOUYulin,WEIXing,CHENYuanjun,FANGLi
(1.SchoolofCivilEngineering,ChongqingThreeGorgesUniversity,Chongqing404100,China;
2.ChongqingWanzhouDistrictMeteorologicalBureau,Chongqing404100,China)
Abstract:ToenhancetheaccuracyofheavyrainfallsimulationandpredictioninWanzhousectionofthe
ThreeGorgesReservoirarea,weemployedthemesoscaleweatherresearchandforecasting(WRF)model
alongwithFNLreanalysisdatafortheprediction.15physicalparameterizationschemecombinationswere
designedbyintegratingfivecloudmicrophysicsschemes ,threecumulusconvectionschemes,theRRTM/
Dudhialongwaveandshortwaveradiationschemes,theYSUplanetaryboundarylayerscheme,andthe
Noahlandsurfacescheme.Wesystematicallyanalyzedtheperformanceofdifferentparameterization
schemecombinationsinthesimulationofspatiotemporalcharacteristicsofprecipitationandidentifiedthe
optimalscheme ,aimingtodevelopaWRFmodelsuitableforthestudyareawithhighsimulationaccura
cy.TheresultsshowthattheWRFmodelcanreasonablyreproducethespatialandtemporalvariationsin
precipitation ;however,itexhibitsatendencyofpredictinganearlieronsetofheavyrainfallandgenerally
underestimatesprecipitationamounts.Themeanhourlyprecipitationbiasrangesfrom -0.62to-0.12
mm ,whiletherelativeerrorinthespatialdistributionof48houraccumulatedprecipitationliesbetween
-66.90% and16.75%.Amongalltheschemecombinations,theWSM6-GD-Noah-RRTM /
Dudhiascheme (A5)demonstratedthebestoverallperformance,withasimulationrelativeerrorofonly
2.79% forthe48houraccumulatedprecipitation.Moreover ,itachievedthehighestaveragethreatscore
(TS)of0.26forheavyandtorrentialrainfallandshowedasignificantlyimprovedsimulationofrainfall
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