象山港潮余流结构及水体半交换时间数值研究.pdf

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1、第37卷第1期2018年2月海洋环境科学MARINEENVIRONMENTALSCIENCEV01．37No．1February2018象山港潮余流结构及水体半交换时间数值研究王平1，陈伟斌1，邹文峰2，袁帅1，陈元1，宋丽娜1(1．国家海洋环境监测中心，辽宁大连116023；2．大连中交理工交通技术研究院有限公司，辽宁大连116024)摘要：基于三维FVCOM模型研究了象山港的潮流场特征，同时耦合Lagrange粒子追踪法及保守污染物输运模型，研究了湾内余环流结构、粒子长期迁移轨迹和湾内水交换特

2、征等。结果表明：象山港海域为非正规的半曰浅海潮，其中M2为其主要分潮；潮致余环流的特征明显，湾外分为两支，一支自牛鼻山水道东岸流入，绕六横岛经佛渡水道南部流出；第二支由佛渡水道进入湾内，并在口门内偏转再经牛鼻山水道西侧流出，其部分水体在牛鼻山水道中部与第一支汇合；西沪港以西峡湾内的余流基本指向湾13，西沪港内余流则指向13门；考虑湾内水体与湾外整体交换时，西沪港的污染物半交换时间在90d左右，黄墩港和铁港内半交换时间在180d左右，两支余流作用范围内的湾口半交换时间在20d以内。关键词：余流；粒子

3、追踪；污染物输运；象山港；数值模拟中图分类号：P731．2文献标识码：A文章编号：1007-6336(2018)01-0107-09Numericalstudyofthetidalresidualcurrentstructureandthewaterhalf-exchangetimeinXiangshangangbayWANGPin91，CHENWei—binl，ZOUWen．fen92，YUANShuail，CHENYuanl，SONGLi-Hal(1．NationalMarineEnviron

4、mentalMonitoringCenter，Dalian116023，China；2．CCCC&DLUTInstituteofTransportationTechnologyCo．Ltd，Dalian116024，China)Abstract：BasedOilthethree-dimensionalFVCOMmodule，whichiscoupledwithLagrangianparticletrackingmodelandconservativepollutanttransportmodel，

5、thehydrodynamic，theconservativepollutanttransport，thetidal—inducedre—sidualcurrent，thetrajectoriesofcharacteristicparticlesandwaterhalf-exchangetimeweresimulated．TheresultsshowedthattidesinXiangshanbayareirregularsemidiurnalones，ofwhichM2isdominant．Th

6、espatialpatternoftideresidualcurrentswasobvious，whichcouldbedividedintotwobranches．ThefirstbranchwasflowinginfromtheeastofNiubishanwaterway，andthenflowedoutintothesouthofFoduwaterwaybypassingLiuhengIsland．TheotherwasflowinginfromtheFoduwaterway，andflo

7、wedoutfromtheeastofNiubishanwaterway，thepartofwhichwasjoininginthefirstbranch．TheresidualcurrentinthewestofXilugangbayispointingtotheentranceofXiangshangangbay，andtheresidualcurrentinXilugangbayispointingtotheharborentrance．Byconsideringtheexchangeofc

8、onserva-tivepollutantinthewholeXiangshangangbaywiththeopensea，thewaterhalf-exchangetimeinXilugangbayis90days，andwhichinHuangdungangandTiegangbayisnear180days，andthewaterhaft-exchangetimeinrangeofthebranchesiswithin20days．KeyWords：residualcurre