简介：TopographyaroundtheYellowRivermouthhaschangedgreatlyinrecentyears,butstudiesonthecurrentstateofma-rinedynamicsofftheYellowRivermoutharerelativelyscarce.Thispaperusesatwo-dimensionnumericalmodel(MIKE21)torevealthetidalandwavedynamicsin2012,andconductscomparativeanalysisofthechangesfrom1996to2012.TheresultsshowthatM2amphidromicpointmovedsoutheastwardby11km.ItfurtherrevealsthatthetidesaroundtheYellowRivermoutharerelativelystableduetothesmallvariationsinthetidalconstituents.Overthestudyperiod,thereisnonoticeablechangeinthedistributionoftidaltypesandtidalrange,andthemeantidalrangeofftherivermouthduringtheperiodstudiedis0.5–1.1m.However,thetidalcurrentschangedgreatlyduetolargechangeintopography.Itisobservedthattheareawithstrongtidalcurrentsshiftedfromtheoldrivermouth(1976–1996)tothemodernrivermouth(1996–present).Whilethetidalcurrentspeedsdecreasedcontinuallyofftheoldrivermouth,theyincreasedoffthemodernrivermouth.TheMaximumTidalCurrentSpeed(MTCS)reached1.4ms-1,andthemaximumcurrentspeedof50-yearreturnperiodreached2.8ms-1.Wavesalsochangedgreatlyduetochangeintopography.Thesignificantwaveheight(H1/3)of50-yearreturnperiodchangedproportionatelywiththewaterdepth,andtheratioofH1/3todepthbeing0.4–0.6.H1/3ofthe50-yearreturnperiodinerosionzoneincreasedcontinuallywithincreasingwaterdepth,andtherateofchangevariedbetween0.06and0.07myr-1.Basedontheresultsofthisstudy,weinferthatinthefuture,themodernrivermouthwillprotrudegraduallynorthward,whiletheerosionzone,comprisingtheoldrivermouthandareabetweenthemodernrivermouthandtheoldrivermouth(Intermediateregion)willcontinuetoerode.Asthemodernrivermouthprotrudestowardsthesea,therewillbeagradualincreaseinthecurrentspeedanddecreaseinwaveheight.Conversely,theold

简介：

简介：