|Table of Contents|

GrainSizeCharacteristicsandEnvironmentalSignificanceofSurfaceSedimentsintheCoastalAreasofRudonginJiangsuProvince,China(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2020年01期
Page:
91-99
Research Field:
·海洋科学·
Publishing date:

Info

Title:
GrainSizeCharacteristicsandEnvironmentalSignificanceofSurfaceSedimentsintheCoastalAreasofRudonginJiangsuProvince,China
Author(s):
HuangRunqiu; ZhaoYifei; LiuQing; XuMin
CollegeofMarineScienceandEngineering,NanjingNormalUniversity,Nanjing210023,China
Keywords:
coastalareasofJiangsu; surfacesediments; grainsizecharacteristics; sedimentaryenvironment; sedimentarydynamics
PACS:
P736.2
DOI:
10.3969/j.issn.1001-4616.2020.01.014
Abstract:
Basedonthedatasofgrainsizecompositionandparameteranalysisof32surfacesedimentsinthecoastalareasofRudonginJiangsuProvince,thedistributioncharacteristicsofsedimenttypes,grainsizecomponentsandgrainsizeparameterswereanalyzed.Inaddition,combinedwiththeFolk&Ward’snomenclature,theQ-typesystemclusteranalysismethodandthetidaldynamiccharacteristicsofthestudyarea,thecoastalareasofRudongweredividedintothreesub-areas,namelythenear-shoretidalflatandsandridgearea,thetidalchannelareaandtheedgeregionofsandridge,respectively.TheresultsindicatedthatthedistributionofgrainsizeinsurfacesedimentshasobviousspatialdifferencesinthecoastalareasofRudongbytheinfluenceofmaterialsourceandsedimentarydynamicsenvironmental.TherearethreesedimenttypesinsurfacesedimentsinthecoastalareasofRudong,withsandysiltasthemaincontent,theaveragecontentof50%;followedbysiltysand,theaveragecontentof46.87%;thesandcontenthaveleastproportion,theaveragecontentof3.13%.Themeangrainsizeofsurfacesedimentarebetween25.65-171.72μm,andtheaverageof70.61μm.Inaddition,thetrendofspatialdistributionisconsistentwiththechangeofsandcontent.Sortingcoefficient,skewness,andkurtosisarecharacterizedbypoor-difference,near-symmetry-extremelynegative,sharp-verysharp,respectively.Spatially,(1)Thenearshoretidalflat-sandridgearea,thereareabundanceofsandcontentandcoarserofgrainsizeinsedimentsbywaterdepthofshallow,sedimentaryanderosiondynamicchangesofcomplex;(2)Thetidalchannelarea,therearemoreclaycontentandfinergrainsizeinsedimentsbythechannel’sdepthoflarge,thebottomaffectedbyhydrodynamicsofless;(3)Theedgeregionofsandridge,therearedeepwaterdepthandlittleeffectedbytidalcurrentofrelativelystablesedimentaryenvironment.

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Last Update: 2020-03-15