Page 29 - 《水资源与水工程学报》2023年第2期
P. 29
!34 " ! 2 # & ' ( ) & * + , - Vol.34No.2
2023 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2023
DOI:10.11705/j.issn.1672-643X.2023.02.04
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GHIJK:P426.6 LMNOP:A LQRK:1672643X(2023)02002508
Finescalecharacteristicsofsummershortterm heavyprecipitationin
HandanCitybasedondatafrom densifiedrainfallstations
DULiangliang,WANGHongfeng,DONGFangliang,SONGXiaohui
(HandanMeteorologicalBureauofHebeiProvince,Handan056001,China)
Abstract:Basedonthehourlyprecipitationdataof257densifiedrainfallstationsinHandanCityfrom
2016to2021,thethresholdvalueofshorttermheavyrainfall( ≥20.0mm/h)isdeterminedbasedon
thesortingmethod,andthespatialandtemporaldistributioncharacteristicsofsummershorttermheavy
rainfallinHandanareanalyzed.Theresultsshowthattherewere16.3eventsofshorttermheavyrainfall
inHandanCityonaverage ,specifically,17.5eventsinthemountainousareaand15.6eventsinthe
plainarea ,whichmainlyoccurredfrommidJulytomidAugust.Theareaswithhighrainfallintensity
scatteredinthesouthcentralpartofthemountainousarea ,andthenorthandsouthwestpartoftheplain
area.Theextremevalueofrainintensityintheplainwas125.2mm/h(FengzhengTownship,Jize
County)and123.1mm/h(TaoquanTownship,CixianCounty)inthemountainousarea.Theprecipita
tioncorrespondingto50%,75%,95%,99% and99.5% quartileofhourlyrainfallintensitywere
27.8,36.1,56.5,80.4and94.9mmrespectively.Thediurnalvariationofshorttermheavyrainfall
wascharacterizedby “doublepeaks”,withthehighestpeakat17:00-21:00andthesecondarypeakat
5 :00-9:00.Theprobabilityofshorttermheavyrainfallatasinglestationwasthehighest.
Keywords:shorttimeheavyrainfall;regionalautomaticrainfallstation;finescalecharacteristics;spa
tiotemporaldistribution ;HandanCity
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