摘要
Insub-tropicalcoastalwatersaroundHongKong,algalbloomsandredtidesareusuallyfirstsightedintheMirsBay,intheeasternwatersofHongKong.Acalibratedthree-dimensionalhydrodynamicmodelforthePearlRiverEstuary(Delft3D)hasbeenappliedtothestudyofthephysicalhydrographyofHongKongwatersanditsrelationshipwithalgalbloomtransportpatternsinthedryandwetseasons.Thegeneral3Dhydrodynamiccirculationandsalinitystructureinthepartially-mixedestuaryarepresented.ExtensivenumericalsurfacedroguetrackingexperimentsareperformedforalgalbloomsthatareinitiatedintheMirsBayunderdifferentseasonal,windandtidalconditions.TheprobabilityofbloomimpactontheVictoriaHarbourandnearbyurbancoastalwatersisestimated.Thecomputationsshowthat:I)Inthewetseason(May～August),algalbloomsinitiatedintheMirsBaywillmoveinaclockwisedirectionoutofthebay,andbetransportedawayfromHongKongduetoSWmonsoonwindswhichdrivetheSWtoNEcoastalcurrent;ii)Inthedryseason(November～April),algalbloomsinitiatedinthenortheastMirsBaywillmoveinananti-clockwisedirectionandbecarriedawayintosouthernwatersduetotheNEtoSWcoastalcurrentdrivenbytheNEmonsoonwinds;thebloomtypicallyflowspasttheeastedgeoftheVictoriaHarbourandnearbywaters.Finally,theroleofhydrodynamictransportinanimportantepisodicevent-thespring1998massiveredtide-isquantitativelyexamined.ItisshownthatthestrongNEtoEwindduringlateMarchtoearlyApril,coupledwiththediurnaltideatthebeginningofApril,significantlyincreasedtheprobabilityofbloomtransportintothePortShelterandEastLammaChannel,resultinginthemassivefishkill.Theresultsprovideabasisforriskassessmentofharmfulalgalbloom(HAB)impactonurbancoastalwatersaroundtheVictoriaHabour.
出版日期
2005年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
