Page 134 - 《水资源与水工程学报》2024年第5期
P. 134
!35 "!5 # & ' ( ) & * + , - Vol.35No.5
2024 $ 10 % JournalofWaterResources&WaterEngineering Oct.,2024
DOI:10.11705/j.issn.1672-643X.2024.05.16
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MNFOP:TV697.3 QRSTU:A QVWP:1672643X(2024)05013007
Estimationmethodofdefectiveleakageingeomembraneimpermeablereservoirs
1
2,3
1
1
1
LIAOZhibin,HUWanting,ANYanping,WUQi,YUANJunping ,
2
CAOXueshan,DINGGuoquan 2,3
(1.YinchuanChinaRailwayWaterGroupCo.,Ltd.,Yinchuan750004,China;2.CollegeofCivilandTransportation
Engineering,HohaiUniversity,Nanjing210098,China;3.KeyLaboratoryofMinistryofEducationfor
GeomechanicsandEmbankmentEngineering,HohaiUniversity,Nanjing210098,China)
Abstract:Defectsingeomembranessignificantlycontributetoleakageinimpermeablereservoirs,theas
sessmentofreservoirleakagerelatedtogeomembranedefectsremainsexperimental ,withnoreportedre
searchonmethodsforestimatingdefectiveleakageinimpermeablereservoirs.Anumericalsimulationin
versionmodelfordeterminingthepermeabilitycoefficientofdefectivegeomembranelayersinimpermeable
reservoirswasdevelopedbasedonthelocalizationofmacroscopicdefectsandmonitoringdata.Subse
quently ,anumericalsimulationmethodwasproposedtoestimatedefectiveleakageingeomembraneim
permeablereservoirs.Basedononsitemonitoringdata,thenumericalsimulationinversionresultsshow
-5
thatthepermeabilitycoefficientofthedefectivegeomembraneimpermeablelayerwas5.0 ×10 m/s,
2
correspondingtotheareaof4m.Thetotalseepageflowandtheflowofperunitwidthsectiondueto
geomembranedefectswerebothinfluencedbythereservoirwaterlevel.Atamaximum reservoirwater
3
depthof14.4meters,thereservoirleakagereachedabout857m /d.Furthermore,therewasadiscerni
bleinfluencerange ,withtheleakageofperunitwidthsectiondecreasingasthedistancefromthecenter
ofthedefectcenterincreased.Theresearchprovidesanapproachforleakageevaluationandsafeopera
tionofgeomembranereservoirsinpracticalapplications.
Keywords:geomembraneimpermeablereservoir;permeabilitycoefficientofimpermeablelayerofdefec
tivegeomembrane ;inversionpermeabilitycoefficient;leakageestimationmethod;equalflowprinciple;
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