Effects of wave forces on sediment transport patterns in micro-tidal estuaries

Zhaozi Zhang, Bingchen Liang, Zhenlu Wang*, Luming Shi, B. W. Borsje

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Estuarinesediment transport isdrivenbythecombinedactionof amultitudeof influencing factors, includingastronomical tides,waves dynamics, andriverdischarges.This study focusesontheeffectsofwave forcesonsediment transportpatterns inmicro-tidal estuaries nearWanbaoBeach,China.Numerical simulationsarecarriedoutusingDelft3D.Modelingscenariosareconfiguredusingdifferentwave characteristics, spanning fromtypicalwaves tothosewithareturnperiodof 50years.Results showthatwaveshaveapositiveeffecton landwardsediment transport, resultinga largeractiverangeof sediment.Bycomparing thespatial geomorphicvariationsundervarying waveconditions,wefindthatmodifications insignificantwaveheight (Hs)primarilyimpact thepositionoferosionanddepositionzones, whereasalterations inspectralpeakperiod(Tp)predominantly influence themagnitudeof thesechanges.The finding is furtherdemonstratedbyacomparisonof residual currentsunderdifferentwave intensities.Analysisof sediment transport rates indifferent transects indicates that thesediment transport rateishighestat themouthtransectsandlowestat thealongshoretransects.Moreover,variations in sediment transport rates exhibitdistinctivepatternsbetweenthe twooutlet transects, evenwhensubjectedto identicalwaveconditions. Thedisparitiesareattributedtodifferences inrunoffandthetopographical features inproximitytotheestuaries.Additionally,wefindthe sediment transportratebecomes insensitivetothevariations inHswhenHs is largerthanathresholdvalue.Thethresholddecreaseswith increasingTp.
Original languageEnglish
Article number027122
Number of pages16
JournalPhysics of fluids
Volume36
Issue number2
DOIs
Publication statusPublished - 9 Feb 2024

Keywords

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