南海北部湾底质沉积物粒度和泥沙运移趋势分析

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1、万方数据SurfaceSedimentGrainSizeAndTransportoftheBeibu6uIflnSouthChinaSeaAbstractTheBeibuGulfofSouthChinaSeaiSlocatedattheiunctionofChinaandVietnam，surroundedbytheVietnamcoastline，GuangxicoastlineandHainanIslandc02Lsfline，whichisaspecialgeographicalposition．NumerousriverbringterrigenousclastintotheBeibu

2、Gulf，Offshorematerialscarriedbytidecurrentsanderodedmaterialsproducedbywavesalsodeopsitedinit，theprovenancesalediverse．inaddition，thesouthoftheBeibuGulfiscoveredbyHainanIsland，oceanwaterflowingintothebaythroughtheopeningandthenorthisinterlinkedbytheQiongzhouStrait。Complicatehydrodynamicforcescreatev

3、ariesseabedtopography．Tidalsandridgesdistributedintheestuaryalongthenorthshore，westexitoftheQiongzhouStraitandthewestsideofHainanIsland．Therefore，exploringthecharacteristicsandtransporttrendofthebottomsedimentinBeibuGulfwouldcontributedirectlytounderstandtheprovenance，hydrodynamicforce，topographyoft

4、heregionandmakeafoundationfortheflLrtherresearch．Inthispaper,typesofsurfacesediment，distributionofthegrainsizeandparameteralestudiedbasedon96segmentsamples．Usingflemmingtrianglegraphicmethodtoconductedadepositiondynamicpartition，andGao—Collinsmethodtodescribethetransporttrendofsurfacesediment．MoreoV

5、er，bathymetricdata，chartdata，observedcurrentdataareapplietosimulatetidalflows，waveanderosion—depositionoftheresearchareasbyMIKE21software．Thesimulationresultsaleverifiedbydepthcomparison．Combinedsurfacesedimentparticlesizeanalysis，simulationresultsandthecharacteristicsoftopography，wemakeasystematics

6、tudyaboutthedeposition-erosionenvironmentanditsimpactontheformationoftopographyinthestudyaleBs，themainresultsaleasfollows．(1)thesurfacesedimenttypesinthestudyareasincludesandysilt，silt，sandy万方数据clay,mud，muddysand，siltysand，gravellymuddysand，gravellysand，pebblysandandsandysiltaccountforthemajority．(2

7、)surfacesedimentsinthenorthshorearecoarser，becauselandmaterialsarecardedintotheseabyriversandrebuiltbywavesandtidalcurrent．ThewestopeningofQiongzhouStraitandwestsideofHainanIslandthetidalsandridgearea