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1、TasklProblemAnalysisBriefIntroductionThepurposeofthisessayistoanalysisproblemineludedinthetopicofcapstone,theproblemabouttheuncertaintyinratingcurveoffloodfrequency,therearefourcomponentsinthisarticle:identification,analysis,reviewanddiscussion.Lastly,thereisconclusionaboutthewholeanalysis・Identif
2、icationRiverflowrateisoneofthebasicdatainfloodfrequencyanalysis,itcanbebothstableandunstable・Flowtesttechnologyismorecomplex,thecostisexpensive,difficulttocontinuous・Whilethecontinuouslyviewreadingleveliseasytodo,sousuallywilluseleveldata,throughtherelationshipbetweenwaterflowratecalculation,conve
3、rtedtoacontinuousflowdata,watercalculationorusedtoanalyzethehydrologicalforecast;Sometimes,duetosomeneed,theflowofwaterthroughthewaterlevelispushedbacktothewaterlevel,suchasthefloodleveloftheriverandthedownstreamwaterlevelofthedam・Therefore,thewaterlevelflowrelationshiphasimportantpracticalsignifi
4、canee.Theaccuracyoftheseactualdataiscritical,asuncertaintyinthesedataisdirectlyrelatedtoflood'squantileestimateswhichhasahugeimpactonfloodriskassessmentandengineeringdesign.Ratingcurveisamathematicalmodeloftherelationshipbetweenstageanddischarge(Haque&Rahman&Haddad),itcanbementionedbyequationorbyd
5、rawingacurve.Iftherelationshipchanges,amodelmaynotbeenough・Thenitmodelsnotonlyrelationshipofchange9butalsohowtorepresentthetransformationbetweentheoriginalmodelandthenewmodel.Therefore,evaluatingtheprocessofahydrologicalobservatoryisessentiallyasimulationexercise・Theresultsofperiodicdischargemeasu
6、rementsareusedascalibrationdata・AnalysisIngeneral,thereportedemissionsdataarenotmeasureddirectly,howevertheyareestimatedbyaratingcurverepresentingthenationalemissionsrelationshipononesectionofriver.Therefore,whenthetrueratingcurveisunknown,thisresultsintheuncertaintyoftheflowdata,andthedeterminedr
7、atingcurveisusuallyrelatedtosomefactorsormanyerrordegrees・Althoughtheuncertaintyoftheratingcurvecanmentionerrorintheflowdata,itcanstillbeignoredinfloodfrequencyanalysis・AnexperimentresultforasetofNewSouthWalescat
