层状土壤指流及污染物优先迁移特性的试验分析

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1、Abst「aCtTitle:EXPERIMENTALSTUDYONCHARACTERISTICSOFFINGERFLOWANDPOLLUTANTPR10ROTYTRANSPORTINLAYERDESOILMajor:Agrieultural5011andw自terEngineeringName:RuiGAOSignature:SuPervisor:ProLJianfengZHANGSignature:AbstraetTheeharaeteristiesofthenorthwestloess15n

2、on一homogeneous耐sotroPieandobviouslyIayer-structured.ThesecharacteristiesareoeeurredthebasisofPreferentialflow.TheresultsshowthatalargenumberofPollutanttransPortthroughPreferentialfloweausedbydeeP5011andundergroundwaterPollution.Inordertogettoknowthei

3、nflueneerouteofPreferentialflowhasbringforthetransPortionofwaterandPollutant，basedonNationalNaturalSeienceFundProjeet”ExPerimentalstudyontheeharacterofstructuredloessPollutant，5PreferentialtransPortion，，，wedidnon一saturationlayerstrUetured50115wateri心

4、ltratingexPerimenttostudythefingerfiowandNO3一NtransPortintheProcessofwaterinfiltration，usingxi，an，5loessandsand.w己diseusseddifferentPhysicalProPertiesof50111心ueneeonsimulatingfingerflowandthefingerflow，5idueneeonthetransPortionofNO3一Nin50115.Also，wer

5、evealedthebasieonfingerflowinlayerstruetureof50115andthetransPortionofNO3一Nin50115.TheexPerimentofresultssuPPlyneeessaryseientifiebasisforthefurtherstudyoffingerflow.BasedoneXtensiveon如gerflowandtransPortofNO3一Nresearchaehievementsfromdomestieandabro

6、ad，eaJ汀yingonsomeexPerimentindoorsoninteriorsystemandusingamathmodeltosimulate，wegetsomeachievementasfollows:1.W亡ProPosedthemethodforsimulatingthePhenomenonoffingerflowinLayeredstrUetUreof5011，that15，installingthefingerflowofmoldinexPerimentandsimula

7、tingfmgerflowwithsandofdifl七renidianleters.2.hitheProeessofwaterinfiltrating，ifthe5011，5PhysiealProPerty15different，theaffeetingfactor15alsodifferentwhensimulatingfingerflow.w七useveloeityoffingerflowtoillustratedeharaeteroffingerflow.Iftheafl七etingfa

8、etorwhensimulatingfingerflow15different，theveloeityoffingerflowwillalsobedifferent.TheveloeityoffingerflowdeveloPsslowerifthethieknessoftheuPPer-layer5011aremorelargerandmedianPartielesizeofmatrix111夕、西安理工大学硕士学位论文sandaremorelarger.Theveloeityof伽gerfl