Page 75 - 《水资源与水工程学报》2024年第2期
P. 75

!35 "!2 #                         & ' ( ) & * + , -                               Vol.35No.2
               2024 $ 4 %               JournalofWaterResources&WaterEngineering                 Apr.,2024

            DOI:10.11705/j.issn.1672-643X.2024.02.08


                            'ÅaD<†y8 VMD-LSTM‹2

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                 GHIJK:P338   LMNOP:A    LQRK:1672643X(2024)02007112
                           SimulationofmonthlyrunoffbyVMD-LSTM coupled

                                        modelbasedoncorrelationtesting
                                                                             1,2
                                                                                          1,2
                                          1
                                                                   1
                            LIUShenghong,SOOMROShanEHyder,LIYing ,LIYinghai ,
                                                                            3
                                                         1,2
                                            CHENGXiong ,YANGShaokang
                    (1.CollegeofHydraulic&EnvironmentalEngineering,ChinaThreeGorgesUniversity,Yichang443002,China;
                     2.HubeiKeyLaboratoryofHydropowerEngineeringConstructionandManagement,Yichang443002,China;
                                   3.XiantaoRiverEmbankmentAdministration,Xiantao433000,China)
                 Abstract:Inrecentyears,thefrequentoccurrenceofextremeheavyrainfallanddroughteventshasin
                 tensifiedtheuncertaintychangesofhydrologicalprocessesinthebasin,makingitmoredifficultforthe
                 predictionofmediumandlongtermrunoffinthebasin.InordertoimprovetheabilityofLSTM (long
                 shorttermmemory)modelincapturingandfittingtemporalchangesinrunoff,takingtheBoyangRiver
                 Basinasthestudyarea ,wecollectedthedataofmonthlyrainfall,evaporationandflowforthesimula
                 tion.Then ,VMD(variationalmodaldecomposition)andcorrelationtestingareusedtoeliminatethein
                 terferenceofirrelevantfrequencycomponentsontheregularlearningofLSTM modelforthepurposeof
                 modelinputoptimization.Inaddition,theeffectsofdifferentcouplingmethodsbetweenVMDandLSTM
                 modelontheaccuracyandstabilityofthemodelareconsidered ,bywhichtheVMD-LSTMmonthlyrun
                 offcoupledmodelwhichtakestheadvantagesofbothisfinallyselected.Thesimulationresultsshowthat
                 theVMD-LSTM coupledmodelcansignificantlyimprovethesimulationaccuracybutitislackingin

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