Page 45 - 水利学报2025年第56卷第3期
P. 45
Effectoftherevisionoftechnicalstandardfordeterminationofsediment
particlesizeontheestimationofparticlesizedistribution
1
1
2
YANGRunyi,ZHANGHongwu,ZHUJinfeng
(1.StateKeyLaboratoryofHydroscienceandEngineering,Beijing 100084,China;
2.DepartmentofHydrologyoftheMinistryofWaterResources,Beijing 100053,China)
Abstract:Theprinciplesandmethodsfordeterminingsuspendedsedimentparticlesizeintechnicalstandardshave
undergonerevisionseveraltimes.Studyingtheimpactoftheserevisionsontheconsistencyofparticlesizedistribu
tiondataenhancesourunderstandingofthereliabilityofthehydrologicaldataandenrichesthetheoryofriverdy
namics.Inordertoinvestigatetheeffectsofthesetechnicalstandardrevisionsontheoriginalhydrologicaldata,
thispapercomparesthecalculationresultsoftheoldandnewsettlingvelocityformulas,highlightingasignificant
differencebetweentheparticlesizesobtainedbytheShaYuqing ’sformulaandGoncharov’searlyformula.Utili
zinghydrologicaldatafromsevenstationsinthelowerYellowRiverfrom1960to1985 ,thestudyre - evaluatesthe
particlesizedistribution,characteristicgrainsize,andaveragesettlingvelocityintheoriginaldataaccordingtothe
particlesizedeterminationmethodpreviouslyandcurrentlyadoptedbythetechnicalstandard.Thedegreeofinflu
enceofthestandardchangeondataconsistencywasassessed,revealingthatdifferentsettlingvelocityformulasaf
fecttheconsistencyofhydrologicaldata,hamperingfinestudyofsedimentmovementlaws,particularlythewater
carryingcapacity.Inordertoaddressissuesarisingfromtechnicalstandardrevisions,thestudyproposesapolyno
mialregression - basedmethodforparticlesizedistributionconversion,whichdemonstrateshighfittingaccuracy.In
thelastpartofthispaper,thedifferencesinthecalculationresultsoftheGoncharov’searlyformulaandtheSha
Yuqing’sformulawithtemperaturevariationsarestudiedandcomparedwiththosederivedfromZhangRuijin’sfor
mula.Theresultsfoundthatthechangeofviscouscoefficientcausedbyvariationsintemperaturehasthemostpro
nouncedeffectonthesedimentsettlingvelocitycalculatedbyZhangRuijin ’sformula,whichisinlinewiththe
basicconceptofsedimentsettlingthebest.
Keywords:determinationofsedimentparticlesize;technicalstandardrevision;theYellowRiver;particlesize
distribution;settlingvelocityformula
(责任编辑:鲁 婧 韩 昆)
(上接第 316页)
AmethodcoupledGaussian - ExtremedistributionwithCloudmodelsfor
riskanalysisoffloodcontroloperationalscheme
KANGLing,LIAOWufeng,ZHOULiwei,WENYunliang
(SchoolofCivilandHydraulicEngineering,HuazhongUniversityofScienceandTechnology,Wuhan 430074,China)
Abstract:Theflooddisasterseriouslythreatensthesafetyoflifeandpropertyandtherapidandstabledevelop
ment.Itisnecessarytoacceleratetheconstructionofanintelligentwaterconservancysystemwiththefunctionsof
“forecast,earlywarning,rehearsalandpre - plan”.Thispaperfocusesontheriskanalysisoffloodcontrol
schedulingplan(FCSP)intheintelligentwaterconservancysystem.AsetofFCSPriskanalysisindexsystemsis
constructed,integratingreservoirs,leveesandfloodstorageareas.Targetingfloodriskdistributionsthatdonot
fullyconformtoaGaussiandistribution ,ariskanalysismethodforFCSPsbasedonGaussian - Extremevaluedis
tributionandcloudmodelsisproposed.TheriskleveloftheFCSPispresentedinanintuitivemanner,andasys
tematictransformationofthequalitativeandquantitativeriskoftheFCSPisachieved.Takingthefivenumbered
floodsintheYangtzeRiverbasinin2020ascasesforanalysis ,theresultsindicatethattheriskanalysisresultsof
themethodinthispaperareclosertorealityandmorereasonablethantheGaussiandistributionmethod ,andthe
riskvaluesandriskratingsofthecorrespondingfloodpreventionanddispatchingplansunderthefivenumbered
floodsare0.18(Class Ⅳ),0.30(Class Ⅲ),0.37(Class Ⅲ),0.19(Class Ⅳ),and0.40(Class Ⅲ),re
spectively.Thesefindingssuggestthatthelower - riskplanswereadoptedforfloodpreventionanddispatching ,
therebyensuringthesafetyoftheYangtzeRiverBasin.Furthermore,themethodinthispaperenablesreal - time
evaluationandcomparativeanalysisoftheplans ,whichallowsforasystematicanalysisoftherisksituationofthe
plansandprovidesscientificsupportfortheriskanalysisofFCSPs.
Keywords:intelligentwaterconservancy;floodcontrolschedulingplan;floodriskanalysis;indicatorsystem;
Gaussian - Extremedistribution;Cloudmodel
(责任编辑:耿庆斋)
— 3 2 7 —