RESPONSE OF SEDIMENT DISCHARGE TO ECOHYDROLOGICAL FACTORS IN LUERGOU CATCHMENT BASED ON WAVELET ANALYSIS-中国期刊网

摘要 Theresponseofsedimentdischargeratetothefollowingfourecohydrologicalfactors:temperature,rainfall,evapotranspiration(ET),andstreamflowwasevaluatedbyconductingwaveletanalysisonLuergousmallcatchmentdatarangingfrom1982to2000.Forsedimentdischargerate,therewasanoveralltrendofreductionthatincludedaperiodicoscillationof6to7yearspercycle.Rainfallalsohadanoveralltrendofreductionthatincludedtwoperiodicoscillationsof7yearspercycleand2yearspercycle,respectively.Streamflowhadthesametrendasrainfallbuthadoneperiodicoscillationof6to7yearspercycle.Incontrastwithrainfallandstreamflow,thetrendsfortemperatureandETeachshowedanoverallincreasingtendency,andbothhadthesametwoperiodicoscillationsof6to7yearspercycleand4yearspercycle,respectively.Thesedimentdischargeratehadsignificantrelationshipswiththefourecohydrologicalfactors,withstreamflowandrainfallhavingpositivecorrelations,whileETandtemperaturehadnegativecorrelations.ThecorrelationbetweenETandsedimentdischargeratebecamestrongerwhenETwascomparedtothesedimentdischargerateofthefollowingyear.Therelationshipbetweensedimentdischargerateandthefourecohydrologicalfactorswasfurtherexpressedbythemulti-linearregressionmodelthatwasconstructed,whichmakessedimentdischargerateafunctionofstreamflow,rainfall,ET,andtemperature.

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RESPONSE OF SEDIMENT DISCHARGE TO ECOHYDROLOGICAL FACTORS IN LUERGOU CATCHMENT BASED ON WAVELET ANALYSIS

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RESPONSE OF SEDIMENT DISCHARGE TO ECOHYDROLOGICAL FACTORS IN LUERGOU CATCHMENT BASED ON WAVELET ANALYSIS

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