水文频率分析（hydrologic frequency analysis）

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1、水文频率分析（Hydrologicfrequencyanalysis）HydrologicfrequencyanalysismedicalaircraftHydrologicfrequencyanalysisaccordingtosomestatisticalcharacteristicsofthehydrologicfrequencyanalysisofhydrologicalfrequencyanalysis,usingtheexistinghydrologicaldataanalysis,hydrologicalvariablesdesignvalueandfrequen

2、cy(returnperiod)thequantitativerelationshipbetweenthe.CatalogbriefintroductionHydrologicalfactorsSampleseriesEmpiricalfrequencyRecurrenceperiodStatisticalparameterFrequencycurvePlottingmethodoffrequencycurveAbriefintroductiontothereasonablenessoftheresultsHydrologicalfactorsSampleseriesEmpir

3、icalfrequencyRecurrenceperiodStatisticalparameterFrequencycurvePlottingmethodoffrequencycurveTheresultsarereviewedandeditedAccordingtotheoccurrenceofnaturalphenomenacanbedividedinto:theinevitableeventthatundercertainconditionswillinevitablyhappen,suchasrainfallwillberisingisinevitable;thatin

4、theunlikelyevent,undertheconditiontorealizethatwillneverhappen,ifonlyinthegravityofwaterflowislowtohighimpossible;randomevents(alsoknownastheaccident),whichmaytakeplaceundercertainconditionsmaynotoccuraseachrivereveryyearanannualmaximumflowisinevitable,butthisisthemaximumpossiblevaluemaybeth

5、atvalue,itappearsinthenumberisarandomevent.Infrequencycalculation,thepossibilityofoccurrenceofaninevitableevent(i.e.,onehundredpercent)isrepresentedby1,andthepossibilityofoccurrenceofanimpossibleeventisrepresentedby0.Theprobabilityofarandomeventisbetween0and1.Editthissectionofhydrologicalfac

6、torsAstheamountofrainfallandrunoffinappearancehasthecharacteristicsofrandomness,suchasvariablerainfall,annualpeakflowandminimumflowindryseasonarerandomevents,areavailabletocalculatethefrequencyanalysismethod.Hydrologicalfrequencyanalysismainlyincludes:thecompositionofthesampleseriesusingthee

7、xistinghydrologicaldata,selecttheappropriatefrequencycurveandstatisticalestimationofitsparameters,accordingtothecalculationoffrequencycurvedrawncorrespondingtovariousfrequency(returnperiod)designhydrologicalvalues.EditthissectionsampleseriesAcollec