大工秋《工程水文学》在线作业 答案

'大工11秋《工程水文学》在线作业2答案Greatworks,11autumn,engineeringhydrology,onlinehomework,2Totalscore:100testtime:-testscores:100RadioexaminationAmultiple-choicequestionJudgmentquestionRadioexaminationquestions(5questions,30points)Score:301.theprobabilityofaninevitableeventisequalto().A.1B.0.5C.0D.between0and1Thecorrectanswer:AFullScore:6points:62.reasonsofchannelfloodwavedeformation(is).A.plusdropB.intervalrunoff C.networkregulationandcrosssectionscourandfillD.ormorefactorshaveanimpactThecorrectanswer:DFullScore:6points:63.,inordertotakeintoaccounttheinfluenceofantecedentrainfall,runoffisoftenusedinrunoffforecasting.A.runoffmodulusindexB.runoffmodelratioindexC.rainfallindexD.soilwatercontentindexThecorrectanswer:DFullScore:6points:64.thestatisticalparameterofthesamplethatreflectstheconcentrationordispersionofvariablesintheseriesis().A.meanB.meansquaredeviationC.coefficientofvariationD.skewnesscoefficient Thecorrectanswer:BFullScore:6points:65.runoffisformedbyprecipitation,sotherelationbetweenannualrunoffandannualprecipitation.A.mustbecloseB.mustnotbecloseC.iscloseinwetareasD.iscloseinAridAreasThecorrectanswer:CFullScore:6points:6Greatworks,11autumn,engineeringhydrology,onlinehomework,2Totalscore:100testtime:-testscores:100RadioexaminationAmultiple-choicequestionJudgmentquestion,(atotalof5multiple-choicequestions,atotalof30points.)Score:301.,therearemanymethodstoestimatethepopulationparametersfromsamples,andtheparameterestimationmethods usedinengineeringhydrologycalculationare().A.linemethodB.momentmethodC.weightfunctionmethodD.probabilityweightedmomentmethodThecorrectanswer:ABCDFullScore:6points:62.thedesignrepresentativeyear"sselectionprincipleis().A.flowcloseprincipleB.adverseengineeringprinciplesC.accordingtotheabundanceyearD.selectsaccordingtodifferenttasksThecorrectanswer:ABCDFullScore:6points:63.inprobabilitytheory,theresultofarandomtestiscalledanevent.Eventscanbedividedinto().A.inevitableeventB.randomevent C.impossibleeventD.accidentThecorrectanswer:ABCFullScore:6points:64.whentheextendedseriesofrelatedlawsrequires().A.observationsweremorethan15-20B.avoidscrossingcorrelationC.usesprimitivevariablesD.epitaxialrangenotexceeding50%Thecorrectanswer:ABCDFullScore:6points:65.,thekeyproblemofhydrologicalanalogymethodistoselecttheappropriatereferencewatershed.A.longmeasuredrunoffdataB.climateconditionconsistencySimilartotheunderlyingsurfaceoftheC.D.basinareaissimilarThecorrectanswer:ABCDFullScore:6points:6 Greatworks,11autumn,engineeringhydrology,onlinehomework,2Totalscore:100testtime:-testscores:100RadioexaminationAmultiple-choicequestionJudgmentquestionJudgmentquestions(atotalof10questions,atotalof40points)Score:401.,whenhydrologicaldataisextended,therelevanttestdatacanberemovedatadistance.A.errorB.correctThecorrectanswer:AFullScore:4points:42.theirrigationdesignguaranteeraterepresentsthepercentageofthetotalnumberofyearsthetotalamountofwaterusedfortheprojecttobeused.A.errorB.correct Thecorrectanswer:BFullScore:4points:43.therepresentationofdataisthedegreetowhichthesampleisclosetothewhole,thatis,thesizeofthesampleseries,thelongerthegeneralseries,thebettertherepresentation.A.errorB.correctThecorrectanswer:BFullScore:4points:4The4.momentmethodisthemethodofestimatingthepopulationmomentwiththesamplemomentsandestimatingtheparametersofthefrequencycurvebytherelationshipbetweenthemomentsandtheparameters.A.errorB.correctThecorrectanswer:BFullScore:4points:45.,theprobabilitydistributioncurveisusuallycalledfrequencycurveonhydrology.A.errorB.correctThecorrectanswer:BFullScore:4points:4 6.,theregressioncurvemethodandthecorrelationmethodofrunoffbeforeandafterthepredictionofrunoffinthelowwaterforecastaredifferent,andthelongertheforecastperiod,themoreobviousthedifferenceis.A.errorB.correctThecorrectanswer:BFullScore:4points:47.lowflow,alsoknownasminimumflow.A.errorB.correctThecorrectanswer:BFullScore:4points:48.,therecursiveleastsquarealgorithmisusedforreal-timecorrection,andthehydrologicalforecastingmodelmustbefirstlytransformedintoexplicitmodelstructure.A.errorB.correctThecorrectanswer:BFullScore:4points:49.riverflowforecastingduringconstructionclosureperiod, alowflowforecastingmodelundernaturalriverchannelcanbeadopted.A.errorB.correctThecorrectanswer:BFullScore:4points:410.forhydrologicalphenomena,frequencycannotbeusedasanapproximatevalueofprobability.A.errorB.correctThecorrectanswer:AFullScore:4points:4'