Page 139 - 2024年第55卷第10期
P. 139

ofDWWL,andproposesthecontrolprinciplesfortypicaldroughtyearssuchaslightdrought,moderatedrought,
                  etc.,whichareclassified intogradesⅠ, Ⅱ, Ⅲ, and Ⅳ, and staged DWWL.Combiningthereservoir
                  operationmodelwiththeAquaCrop - OSPymodel ,whichcalculatesagriculturalwaterdemandandwaterdemand
                  process,andaimingtominimizetheriskofagriculturalproductionlossesduetodrought,thereservoiroperation
                  processandagriculturalproductionriskofdroughtlossesindifferentinitialwaterlevelscenariosfortypicalyears
                  withdifferentlevelsofdroughtweresimulated ,andtheriskcurvesofagriculturalproductionlossduetodrought
                  wasdrawn.ReservoirwaterlevelcorrespondingtothedemarcationpointoflosslevelriskisusedasthegradedDW
                  WL.TheAquaCrop - OSPymodelisusedtosimulateagriculturalproductionineachtypicalyearundervariousirri
                  gationschemes ,andthepartialcorrelationcoefficientbetweenmonthlywatersupplyrateandrateofreductionin
                  agriculturalproductionarecalculatedtorepresentthesensitivityofwaterdemandineachmonth,whichisusedas
                  thebasisforwatervolumehedgingandDWWLstagingduringtimeperiods.TakingDongzhuangReservoirasanex
                  ample ,themaincropsinitswatersupplyarea,summermaizeandwinterwheat,wereselectedforexampleanaly
                  sis.TheresultsshowthatthegradedandstagedcontrolofDWWLreflectedthecriticalregulationtheoryandthe
                  spatiotemporalhedgingregulationofwatervolume ;thechangecurveoftheriskofagriculturalproductionlossesdue
                  todroughtpresentsacontinuous,multiinflectionpoint,andthree - stagechangefeature.DWWLofDongzhuang
                  ReservoirisclassifiedasLevel Ⅳ warninginlightdroughtyears,Level Ⅳ,Ⅲ,andⅡ warninginmoderateand
                  heavydroughtyears,andLevel Ⅰ andⅡ warninginextremedroughtyears.DWWLisdividedintothreeperiods
                  fromJulytoDecember,JanuarytoApril,andMaytoJuneintermsoftime.
                  Keywords:gradedandstageddroughtwarningwaterlevel;AquaCrop - OSPymodel;sensitivitytowaterdemand;
                  theriskofagriculturalproductionlossesduetodrought


                                                                                    (责任编辑:耿庆斋)

              (上接第 1259页)
                         PositioncompensationtechnologyforintelligentmonitoringofRCCdamsin
                                   deepnarrowvalleybasedonGNSS?UWB?RTSfusion

                                  1
                                                          2
                                                  1
                                                                        1
                                                                                     1
                       GAOHaojun,WANGXiaoling,NILei,TONGDawei,LINWeiwei,HEJinlong                 2
                 (1.StateKeyLaboratoryofHydraulicEngineeringIntelligentConstructionandOperation,TianjinUniversity,Tianjin 300354,China;
                                     2.HuanengLancangRiverHydropowerInc.,Kunming 650200,China)
                  Abstract:Inrecentyears,theintelligentmonitoringforthecompactionqualityofthedamshasbeenthehottop
                  icoftheresearch.Theexistingreal - timemonitoringtechnologyforrollercompactedconcrete(RCC)damsrelies
                  onGlobalNavigationSatelliteSystems (GNSS).However,fortherollercompactedconcretedamsbuiltindeep
                  narrowvalleys ,theGNSSsystemissusceptibletotheinterferenceofthesignaldeniedcausedbytheocclusionof
                  mountains.Inresponsetotheaboveissues ,thisstudyhasproposedanintelligentpositioningcompensationtech
                  nologyforthecompactionconstructionofRCCdamsbasedonthefusionofGNSS?UWB?RTS.Firstly ,amathe
                  maticalmodelforreal - timemonitoringofRCCdamrollingindeepnarrowvalleyareaswasestablishedbasedon
                  theenvironmentalcharacteristicsofthecliffsidewallsandtheobstructionoftheinvertedsuspension.Secondly ,
                  thepositioningcompensation technologyusingultrawideband(UWB)and robottotalstation(RTS)was
                  introduced.AnimprovedKalmanfilteringalgorithmcombininginnovationthresholdandleastsquareswasadopted
                  tofusetheGNSS?UWB?RTSdatafortoachievecontinuousandstablepositioningmonitoringinsatellitesignalde
                  niedenvironments.Finally ,theapplicationresultsinalarge - scaleRCCdam projectinSouthwestChinashow
                  thatthismethodcanachievereal - timemonitoringoftheentireterrainandprocessofRCCdam constructionin
                  deepnarrowvalleys.ThemethodcompensatesfortheshortcomingsofrelyingsolelyonGNSSforreal - timemoni
                  toringofthecompactionprocess.
                  Keywords:rollercompactedconcretedam;positioncompensation;intelligentmonitoringfordams;Kalmanfil
                  ter ;deepnarrowvalley


                                                                           (责任编辑:李福田 尹 婧)


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