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Wintertimecharacteristicvariabilityoficedistributionandwatertransferefficiency
improvementinCentralRouteofSouth - to - NorthWaterDiversionProjectinChina
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GUOXinlei,PANJiajia,YUANXimin,WANGJun,LUOQiushi,SUXia
(1.StateKeyLaboratoryofSimulationandRegulationofWaterCycleinRiverBasin,ChinaInstituteof
WaterResourcesandHydropowerResearch ,Beijing 100038,China;
2.TianjinUniversity,Tianjin 300072,China;3.HefeiUniversityofTechnology,Hefei 230009,China;
4.YellowRiverEngineeringConsultingCorporationLimited,Zhengzhou 450003,China;
5.ChinaSouth - to - NorthWaterDiversionMiddleRouteCorporationLimited,Beijing 100038,China)
Abstract:TheefficiencyandsafetymanagementoftheCentralRouteoftheSouth - to - NorthWaterDiversionPro
ject (CRSNWD)duringwinteraresignificantlyimpactedbyice.Toimproveitsperformance,itiscrucialtogaina
betterunderstandingofwatertemperatureandicedistributionwithinthesystem.Thispapercompiles11winters ’
fieldobservations,includingmeteorologicaldata,hydrauliccharacteristics, andicedistributionsfrom 2011to
2022.Thestudyaimstoillustratethespatialandtemporalvariabilityofwatertemperatureandicedistribution,un
derstandthedrivingfactorsbehindicepropagationinthesystem,andproposeice - preventionplansforwintertime
watertransfer.Theresultsoffieldobservationsrevealthattheice - affectedregionissmallerandhasashorterdura
tionthananticipated.TheareawithintheCRSNWDaffectedbyiceliesbetweentheQilihesiphonandBeijumahe
culverts ,whiletheicejam - affectedregionissituatedbetweentheHutuohesiphonandBeijumaheculverts.The
averageicethicknessovermultipleyearsis15cm ,withanextremevalueof2.9m,andthehistoricalwaterlevel
riseduetoicejamsis0.73m.WatertemperatureduringwinterdecreasesfromsouthtonorthintheCRSNWD,ex
hibitinganegativecorrelationwithflowdischargeandairtemperature.Thecriticalcross - sectionalaveragewater
temperaturesforborderice,icefloes,andicecoverare3.5℃,1.5℃ and0.25℃,respectively.Thestudyi
dentifiedairtemperature ,waterdiversiondischarge,solarradiation,andwindspeedasthemostdominantfactors
influencingiceprocessesinthesystem.SevereicejamsthatoccurredinJanuary2016resultedfromacombination
ofloweraccumulatedfreezingdegreedays ,largerflowdischarge,andashort - termcoldwave.Ahighwindspeed
intheCaoheductcausesarapiddecreaseinwatertemperatureandsignificanticeformation.Basedonthesefind
ings ,thestudyproposesshorteningoperationperiods,reducingice - affectedregions,optimizinghydrauliccontrol
parameters ,anddevelopingice - preventiontechniquestoenhancethewintertimeoperationoftheCRSNWD.
Keywords:watertemperatureandicedistribution;spatialandtemporalvariability;South - to - NorthWaterDi
version ;wintertimesafety;watertransferefficiency
(责任编辑:李福田)
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