Page 16 - 2023年第54卷第7期
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Multimodelpredictionanditsensembleevaluationofrunoffand
sedimentchangetrendintheYellowRiverBasin
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HUChunhong,ZHANGXiaoming,YUKunxia,XUMengzhen,ZHAOYang
(1.ChinaInstituteofWaterResourcesandHydropowerResearch,StateKeyLaboratoryofSimulationand
RegulationofWaterCycleinRiverBasin,Beijing 100038,China;
2.StateKeyLaboratoryBaseofEco - HydraulicEngineeringinAridArea,Xi’anUniversityofTechnology,Xi’an 710048,China;
3.StateKeyLaboratoryofHydroscienceandEngineering,TsinghuaUniversity,Beijing 100084,China)
Abstract:ThevariationofrunoffandsedimentintheYellowRiverprofoundlyaffectsthedecision - makingofmajor
issuesintheYellowRiverprotectionanddevelopment ,suchasthelayoutofrunoffandsedimentregulationpro
jects ,theallocationofwaterresourcesinsideandoutsidethebasin,andtheconstructionofcross - basinwater
transferprojects.However,theattributionanalysisandpredictionresultsofrunoffandsedimentvariationinthe
YellowRivervarygreatlyfromresearchtoresearch ,sincetheyareaffectedbymanyfactorssuchasresearchperi
od ,datumperiod,andresearchmethods.Afteranalyzingtheresultsofrunoffandsedimentchangeattributionand
prediction ,thisstudyconstructsamulti - indexandsystematicmodelaccuracyevaluationsystem andproposesa
technicalframeworkofensembleassessmenttopredictrunoffandsedimentchangesintheYellowRiverinthenext
50yearsbasedonthe9typesofmodelpredictionresultsset.Theresultsshowthatthelargedifferenceintheattri
butionanalysisresultsofrunoffandsedimentchangeinthetypicalYellowRiverbasiniscausedbydifferentdatare
quirements ,constituentvariables,andthesimulationaccuracyoftheevaluationmethods.Thus,themulti - index
andsystematicmodelaccuracyevaluationsystemincludestheinput - structure - outputassessment.Theapplicability
oftheexistingrunoffandsedimentchangepredictionmodelsisevaluatedfrom fiveaspectsincludingdatarequire
ments ,physicalbasis,applicationefficiency,outputscale,andpredictionaccuracybasedonthestandardized
datainput.The technicalframework ofensemble assessmentisfinally constructed based on multimodel
applicabilityevaluation - multiscenarioset - resultsensembleprediction, andtheaveragerunoffandsediment
amountatTongguanStationoftheYellowRiverarepredictedtobeabout24billionand300milliontonsperyear
respectivelyinthenext50yearsbasedonensembleassessmentof9typesofmodels.
Keywords:runoffandsedimentchangeoftheYellowRiver;attributionanalysis;uncertainty;runoffandsedi
mentmodel;ensembleevaluation
(责任编辑:李福田)
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