Page 96 - 《水资源与水工程学报》2023年第4期
P. 96

!34 " ! 4 #                       & ' ( ) & * + , -                               Vol.34No.4
               2023 $ 8%                JournalofWaterResources&WaterEngineering                 Aug.,2023

            DOI:10.11705/j.issn.1672-643X.2023.04.11


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                 MNOPQ:P641.2;TV138   7RSTU:A    7VWQ:1672643X(2023)04009207
                             ApplicationofEMD-LSTM coupledmodeltokarst

                                 groundwaterlevelpredictioninBaotuSpring
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             HOUJinxiao,HUANGLinxian,HUXiaonong,QIANYong,XINGLiting,HANZhong,LIANGHao
                 (1.SchoolofWaterConservancyandEnvironment,UniversityofJinan,Jinan250022,China;2.InstituteofHydrogeology
                 andEnvironmentalGeology ,ChineseAcademyofGeologicalSciences,Shijiazhuang050061,China;3.No.6Instituteof
                   GeologyandMineralResourcesExplorationofShandongProvince,Weihai264209,China;4.ShandongProvincial
                                   TerritorialSpatialEcologicalRestorationCenter,Jinan250014,China)
                 Abstract:Thepredictionofkarstgroundwaterlevelispronetosignificanterrorsduetothestrongnonlin
                 earandnonstationaryfluctuationcharacteristicsofkarstgroundwater.Addressingtothepoorprediction
                 accuracyproblem ,anEMD-LSTM coupledmodelisproposed.Firstly,empiricalmodedecomposition
                 (EMD)isusedtodecomposethekarstgroundwaterlevelofBaotuSpringintofivecomponents(fourin
                 trinsicmodefunctiontermsandoneresidualterm),inordertoeliminatenonstationaryfluctuationsin
                 waterleveldata.Atthesametime,alongshorttermmemory(LSTM)neuralnetworkmodelisconstruc
                 ted ,andtheindicesthatarecloselyrelatedtothedynamicchangeofgroundwaterlevel,suchasrainfall
                 (representingtheaquiferrechargeterm),monthlyaveragetemperature,monthlymaximumtemperature,
                 monthlyminimumairtemperature,andwatervaporpressure(representingtheaquiferdischargeterm),
                 areusedasinputitemstopredictthefivecomponentsrespectively,andfinallythepredictionresultsof
                 thecomponentsaresummeduptoobtainthepredictionvalueofthegroundwaterlevel.Theresultsindi
                 catethatEMDcansignificantlyeliminatethenonstationaryfluctuationcharacteristicsofkarstgroundwa

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