Page 157 - 《水资源与水工程学报》2025年第2期
P. 157

!36 "!2 #                         & ' ( ) & * + , -                               Vol.36No.2
               2025 $ 4 %               JournalofWaterResources&WaterEngineering                 Apr.,2025

            DOI:10.11705/j.issn.1672-643X.2025.02.18


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                       Characteristicsofwaterinfiltrationinloessundernonponding
                                   conditionsanditsimpactonslopestability

                                                                                                            3
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             LEILei ,WANGXiaodong,WEIXiaolong,LIUZirui,CHENQingyun,BAIXulong,TIANKanliang
           (1.ElectricPowerResearchInstitute,StateGridShaanxiElectricPowerCo.,Ltd.,Xi’an710100,China;2.StateGrid(Xi’an)Environmental
                   ProtectionTechnologyCenterCo. ,Ltd.,Xi’an710100,China;3.NorthwestA&FUniversity,Yangling712100,China)
                 Abstract:Rainfallinfiltrationisacriticalfactorinducingslopeinstability,andsimulatingtheinfiltration
                 processtriggeredbyrainfallisessentialforunderstandingslopefailureandrelatedgeologicalhazardssuch
                 aslandslides.Basedonindoorinfiltrationexperimentsconductedonloesssoilcolumns ,thisstudyem
                 ploysHYDRUS1DtosimulatethesoilmoistureinfiltrationprocessandFLAC3Dtoanalyzetheimpactof
                 rainfallinfiltrationonslopestability.Theresultsindicatethatthesimulatedsoilmoisturecontentvaluesat
                 variousdepthsbytheHYDRUS1Dmodelalignwellwiththemeasuredvaluesovertime ,witharoot
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                 meansquareerror (RMSE)rangingfrom0.023to0.039cm /cm andaNash-Sutcliffeefficiency
                 (NSE)exceeding0.7,demonstratinganexcellentsimulationperformance.Additionally,thesoilmois
                 turecontentexhibitscharacteristicsofprolongedresponsetimeandreducedamplitudeofvariationwithin
                 creasingsoildepth.Undernonpondingconditions,themeasuredvaluesofsoilmoistureinfiltrationare
                 highlyconsistentwiththesimulatedonesofthewettingfrontmovement,withacorrelationcoefficientof
                0.997.Themodel’saccuracyinsimulatingthetimingandvelocityofwettingfrontmovementimproves
                 progressivelywithsoildepth,resultinginasignificantwaterflowlageffect.AnalysisusingtheFLAC3D

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