長江河口枯季三維流場懸沙數(shù)值模擬.pdf

1、華東師范大學碩士學位論文長江河口枯季三維流場懸沙數(shù)值模擬姓名：曹慧江申請學位級別：碩士專業(yè)：自然地理學指導教師：朱建榮20050501AbstractBycreatingalargescalecomputinggrid(southtoKanraan，northtoLianyunHarbor，Westto125150E、ofChang]tangestuaryandHangzhouBayandtheirnetghboringseaareas

2、andusinguptodatedataoftidalstations，8majortidalconstituents，M2，s2，N2，K2，Kl，ol，P1andQ1，&resimulatedmoreaccuratelyAndthusmoreaccuratetidallevelboundaryconditioncanbegivenattheopenboundariesofmodelsofChang]iangestuaryBasedo

3、nwellsimulationof8majortidalconstituentsinlargescale，thedataofsynchronousobservationofFebruary2003iscomparedandagridincludingonlyChangtangestuaryiscreatedforvalidationofhydrodynamicnumericalsimulationinChangiiangestuarya

4、ndanalysisofflowfieldResidualcurrentandoverallresidualaresimulatedunderindividuaIeffectofeachdynamicfactorThecharacterofeachresidualconstituentandthecontributionofeachtooverallresiduaIareanalyzedTosimulatethesuspendedsed

5、imentsofChangIjiangestuary，a3DmathematicalmodelofsuspendedsedimentswiththecombineeffectofwaveandcurrentissetupInthemodel，thewaveparameteriscomputedbyuseofthefamollsthirdgenerationshallowwaterwavemodelSWANthesourcefunctio

6、nofthesedimentintheconvectivedifillsiontermisdeterminedbytheshearstresswhichismostclearinphysicsInaddition，asurfaceboundarylayermodelisusedheretoconcerntheinfluenceofthewindwavetotheshearstress砒surfaceaboUomboundarylayer

7、modeltoConcernthevariationofbottomshearstressunderthecombineeffectofwaveandcurrentTheradiationstressisaddedtotherightsideofthegoverningequationtoconcernthemomentumfluxgeneratedbywave。ThesurfaceboundaryCOIlditionoftheturb

8、ulenceclosuremedelisrevisedtoconcernthewaveturbulentfluxandtheinfluenceofsaltnityandsedimentconcentrationtowardsthesedimentationveloc：ityofsuspendedsedimentTheinfluenceofwindwavetoestuarinemaximumturbidityzoneisstudiedby

9、constructinganidealestuaryandusing3DsuspendedsedimentmodelMoreoveLthesuspendedsedimentmodelisappliedtoChangJtangestuaryandthewindwave，salinityandsuspendedsedimentindryseasonofChang]tangestuaryarcsimulatedThecomputingresu

10、ltsatsurfaceandbottomlayersduringneaptideandspringtidearecomparedwith也eobserveddataTheanalysisofthecomputingresultofsuspendedsedimentisalsocarriedoutinthispaperItshowsthatthemodelcanperformgoodsimulationofsuspendedsedime