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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FGHIJ:TU43;P642.22 KLMNO:A KPQJ:1672643X(2025)02015308
Characteristicsofwaterinfiltrationinloessundernonponding
conditionsanditsimpactonslopestability
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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
ploysHYDRUS1DtosimulatethesoilmoistureinfiltrationprocessandFLAC3Dtoanalyzetheimpactof
rainfallinfiltrationonslopestability.Theresultsindicatethatthesimulatedsoilmoisturecontentvaluesat
variousdepthsbytheHYDRUS1Dmodelalignwellwiththemeasuredvaluesovertime ,witharoot
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3
meansquareerror (RMSE)rangingfrom0.023to0.039cm /cm andaNash-Sutcliffeefficiency
(NSE)exceeding0.7,demonstratinganexcellentsimulationperformance.Additionally,thesoilmois
turecontentexhibitscharacteristicsofprolongedresponsetimeandreducedamplitudeofvariationwithin
creasingsoildepth.Undernonpondingconditions,themeasuredvaluesofsoilmoistureinfiltrationare
highlyconsistentwiththesimulatedonesofthewettingfrontmovement,withacorrelationcoefficientof
0.997.Themodel’saccuracyinsimulatingthetimingandvelocityofwettingfrontmovementimproves
progressivelywithsoildepth,resultinginasignificantwaterflowlageffect.AnalysisusingtheFLAC3D
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