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Studyonthedistributioncharacteristicsofsuitablevegetationgrowthareason
typicalsandbarsintheupperJingjiangRiverbasedonremotesensingimages
YUANJingyao,SUNZhaohua,LIZhiqing,ZHOUWeixing,CHENLi
(StateKeyLaboratoryofWaterResourcesandHydropowerEngineeringScience,WuhanUniversity,Wuhan 430072,China)
Abstract:Mid - channelbarsareimportantpartsoffloodplainsinthemiddlereachoftheYangtzeRiver.Clarifying
thedistributioncharacteristicsofsuitablevegetationgrowthareasonthebarsandthecriticalconditionstheyshould
meetisacrucialprerequisiteforecologicalembankmentplanninganddesign ,aswellasvegetationchangingtrend
predictionontheriverinefloodplainaftertheoperationoftheThreeGorgesDam.Inthisstudy,GuanzhouBarand
TuqizhouBar ,locatedintheUpperJingjiangRiver,wereselectedastypicalrepresentativesofgravelandsand
mid - channelbars ,respectively.Long - timeseriesoffloodplaininundationandvegetationinformationfrom1986to
2002wereextractedbasedonLandsatremotesensingimages.Animprovedmethodcombininghydrologicaldataand
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