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ID:33762528
大小:16.20 MB
页数:54页
时间:2019-03-01
《大沽河咸水入侵电阻率法监测技术分析-(5765)》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据MonitoringsaItwaterintrusionusinghighdensityresistiVitytechnoIogyinDaguRiverzoneAbstractWaterisanessentialresourceforhuman.Asanimportantpartofwaterresource,groundwaterisoneofthemajorsourceofirrigationanddomesticwaterinmanycity.DaguRiveristhemostimportantgroundwaterreservoirofQingdao
2、.SeawaterintrusionoccurredindownstreamofDaguRiverbyreasonoftheoverexploitationofgroundwater.In1998,inordertosolvethisproblemfundamentally,Mawanzhuangseepage—preventionwallwasconstructedindownstreamofDaguRiver.Seawaterintrusionhadbeeneffectivelyprevented,however,somesaltwaterremainedinth
3、etownofLigezhuangatthesametime.Therefore,effectivemonitoringmeansareurgentlyneeded,tofindouttheextentandscopeofsaltwaterintrusion,forecastthedevelopmenttrendofsaltwaterintrusion,andprovidesupportfortherationalmanagement.Basedontheanalysisofexistingwaterqualitydataofmonitoringwells,scien
4、tificandfeasiblesaltwaterintrusionmonitoringmethodswerestudied.Theconclusionsareasfollows:ForsaltwaterintrusioninDaguRiverzone,mineralizationCanreflectthechangeofsaturatedsandlayerresistivity,andthecharacteristicvalueofresistivity23Q·mwhichwasobtainedintheexperimentCanbeusedassaltwateri
5、ntrusioncriterionforresearcharea.Thereisnoobviouseffectofsalinizationdegreeandclaylayerresistivityonthemeasurementofsaltandfleshwaterinterface.Measuringelectrodespacingmainlyaffectstheresolutionofinversionprofile,theresolutionofresistivityprofileincreaseswiththedecreaseofelectrodespacin
6、g.ResistivityprofilingmethodCanaccuratelyreflectthelocationandmorphologyofsaltwaterintrusioninterface,aswellastheextentandtrendofsaltwaterintrusion.Themainworkinthepaperincludesthefollowingfiveparts:(1)Asalt-freshwaterdisplacementexperimentwasperformedtoestablishtheIII万方数据characteristic
7、relationshipsbetweenofionconcentration,mineralizationandresistivityofDagusaltwaterintrusionzone.ItCanprovidetherelevantscientificevidenceforaccuratelydelineatingthescopeofsaltwaterintrusionbyusingresistivityprofiling.(2)Uselargescalesinktoundertakephysicalmodeltestsofsaltwateri
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