Page 208 - 《水资源与水工程学报》2022年第6期
P. 208

! 33 " ! 6 #                      & ' ( ) & * + , -                               Vol.33No.6
               2022 $ 12 %              JournalofWaterResources&WaterEngineering                 Dec.,2022

            DOI:10.11705/j.issn.1672-643X.2022.06.26


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                 KLDMN:P414.8;S161.4   OPQRS:A    OTUN:1672643X(2022)06020409
                        Developmentofasmallscalelocalweighinglysimetersystem


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                                     1
                                                                1,2
                          XIEYongyu,CHENBing,XUJunzeng ,LIPing,FANGMingchen,
                                                                              2
                                                                2
                                                   4
                                          CHENXi,WEIHanjin,LIUXiaoyin
              (1.StateKeyLaboratoryofHydrology-WaterResourcesandHydraulicEngineering,HohaiUniversity,Nanjing210098,China;
               2.CollegeofAgriculturalScienceandEngineering,HohaiUniversity,Nanjing211100,China;3.NanjingWaterPlanningand
               DesigningInstituteCo.Ltd. ,Nanjing210049,China;4.CollegeofEnvironment,HohaiUniversity,Nanjing210098,China)
                 Abstract:Tofurtherimprovetheresolutionandaccuracyofweighinglysimeters,asmallscalelocal
                 weighinglysimetersystemequippedwithhighprecisionweighingsensorsandreferencebucketswhichcan
                 eliminatetheinfluenceofenvironmentalfactorsontheweighingwasdevelopedandthenappliedtoob
                 servericeevapotranspiration(ET)andinterplantevaporation(E).Theresultsshowedthatthereso
                 lutionof ETandEmeasuredbythissystemcanreach0.005mmand0.003mm,respectively,andthe
                 correspondingobservationtimeofpeakETandEarelessthanaminute(10sand20sforETandE,re
                 spectively)fortheidentificationofthewaterconsumption;moreover,itcanstillmanage3-5minutesin
                 thelowthroughputphase.TheobservationaccuracyofETon15min,hourlyanddailyscalebythisly
                 simetersystemwereimprovedby3.51%,2.17% and0.77%,andthoseofEwereimprovedby18.
                52%,11.81% and2.95%,respectively.Itshowsthatthelysimetersystemcanproduceaccurate,sta
                 bleandreliabledatawithhighresolution,itisapplicabletotheresearchofagriculture,hydrologyand
                 otherrelatedfields,especiallyforthemeasurementofsmallwaterchangessuchasshorttermevapotrans
                 pirationandatmospherecondensedwaterofecosysteminaridregions.
                 Keywords:weighinglysimeter;evapotranspiration(ET);evaporation(E);resolution;accuracy





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