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1、现冲刷。一个大风过程前后实测沉积物粒度特征显示，大风使位于1.5m—4m等深线之间南北向分布4个采样点沉积物变细，这种现象主要由研究区内偏E向风及测线处流场特征造成的：偏E向风导致泥沙以沿岸运动为主，而流速在测线处的降低导致了粉砂粒级沉积物的沉降，使沉积物变细。关键词：数值模拟；风暴潮；波浪作用；泥沙运动万方数据NumericalSimulationofSedimentMovementandItsDynamicMechanisminaStrongWindProcessesofNorthernSeaoftheYellowRiverDeltaAbstractStrongwindabove6l
2、evelalwayshappensinthenorthernseaoftheYellowRiverDelta,waterlevelrisecausedbythesuperpositionofstormsurgeandastronomicaltideduringthewindyperiods,makingcoastalerosion,wharfbreakwatercollapseandotheraccidentsoccureasilywiththehugestorms,leadtohugeeconomiclosses.Inextremeseaconditions,sedimentmovem
3、enthyperactive,leadtosedimentdisasters:oilplatforms,pipelinesdestroyedandwaterwaysbasinsedimentation.Sothestudiesofsedimentmovementanditsdynamicmechanismunderextremeseaconditionsareveryimportant.Thispapersystematicallyanalyzestheimpactofwindinstormsurges,waves,erosionanddepositionetc,haveapractic
4、alsignificancefordisasterearlywarningandprotectionofcoastalengineeringduringthestrongwind.Inthispaper,astormsurgemodelandwavemodelsacrosstheBohaiSeawasestablishedandwinddatameasuredinthecenterIIplatformasinputconditions.Thispaperanalysistheimpactofwindonhydrodynamiccombinedwiththemeasuredwind,tid
5、e,currents,wavedata.Theresultshowsthat:①N,EwindcancausewaterincreaseandS,WcancausewaterreductioninNorthernSeaoftheYellowRiverDelta;whenthedirectionofwindandflowaresame,thecurrentvelocityincrease,andviceversa;E,NEwindcanproducelargewavesinstudyareabecauseoflongerfetchlength.②Undertheinfluenceofthe
6、SWwind,waterreductionoccurrinstudyarea,thevalueisabout0.3m;dramaticlevelincreaseinthisareaontheimpactofEwind,waterincreasedvalueisabove0.8m;thecontourlinenorth-southdistribution,waterincreasedvalueisgreaterinwestthanthatineast;undertheEwind,thestudyareabecomeebbdominant;whetherE,NEorW,NWwind,wave
7、sbecomesmallerfromtheeasttothewestgradually,thewavecontourlineapproximatelyparalleltotheisobaths,butE,NEwindleadtolargerwave.Thispaperanalyzedthecorrelationbetweensuspendedsedimentandwave,current,calculatedthesuspended
