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                                 ImprovementoftheDigitalYellowRiverIntegratedModel
                                           basedonmultisourceremotesensing

                                                                                      4
                                                                           1,2,3
                                           1,2,3
                                                                                                  1,2,3
                    XUEYuan  1,2,3 ,QINChao   ,WUBaosheng   1,2,3 ,ZHANGGa    ,LIDan,FUXudong
                          (1.StateKeyLaboratoryofHydroscienceandEngineering,TsinghuaUniversity,Beijing 100084,China;
                     2.KeyLaboratoryofHydrosphereSciencesoftheMinistryofWaterResources,TsinghuaUniversity,Beijing 100084,China;
                   3.DepartmentofHydraulicEngineering,TsinghuaUniversity,Beijing 100084,China;4.EmergencyScienceResearchAcademy,
                        ChinaCoalResearchInstitute,ChinaCoalTechnology&EngineeringGroupCo.,Ltd.,Beijing 100013,China)

                  Abstract:Manyriversaredevelopedinmountainousareas,buttheseriversaredifficulttomeasureonsitedueto
                  thecomplextopography,anditisimpossibletoobtainsufficientbasicriverinformation,whichmakesmountain
                  riversatypicalpoorlygaugedbasin.Thisstudycombines68rivercrosssectionsextractedfrommultisourceremote
                  sensingdataand34rivercrosssectionsmeasuredbyhydrologicalstationstoestablishageneralizedmodelofriver
                  crosssectionsinthemiddleYellowRiver.Thegeneralizedmodelofrivercrosssections ,riversurfacesandtradi
                  tionalDEM rivernetworksformsarelativelycompleteriverboundarygeometricmorphologyoftheentirewatershed.
                  Basedontheriverboundarygeometricdata ,theconfluencemodeloftheDigitalYellowRiverIntegratedModel
                  (DYRIM)wasimproved.Subsequently,intheHuangfuchuanRiverbasin,whichisthefirst - ordertributaryof
                  theYellowRiver ,basedontheimprovedDYRIM,wesimulatedandverifiedthedailyrunoffprocessinthe2016
                  floodseasonand21typicalfloodprocessesfrom2010to2016afterusingdatafrom 2010to2015tocalibratethe
                  model.Theresultsshowthattheinputparametersoftheimprovedmodelcanbeobtainedfromremotesensingob
                  servations ,andthesimulatedNash - Sutcliffeefficiencycoefficientofdailydischargeishigherthan0.8.Thesimu
                  latederrorsofflowvelocityandwaterdepthare7% and9% respectively,theerrorofpeakdischargeoffloodis
                  15% onaverage,andtheerrorofpeakpresenttimewasapproximately1.4h,allofwhichweresignificantlyim
                  provedcomparedtobefore.Thisresearchcanprovidebasicdataandtechnicalreferencesforthesimulationof
                  hydrologicalprocessesofmountainriversandresearchonrivergeomorphologyevolution.
                  Keywords:mountainrivers;multisourceremotesensing;crosssectionmorphology;DigitalYellowRiverInte
                  gratedModel

                                                                                    (责任编辑:于福亮)

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