【英文标准名称】:StandardGuideforDevelopmentofGround-WaterMonitoringWellsinGranularAquifers
【原文标准名称】:开发土壤蓄水层中地下水监控井的标准指南
【标准号】:ASTMD5521-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.21
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:含水土层;粒状;地下水;监控;自然资源;水质;水井;水域
【英文主题词】:aquifer;groundwater;high-velocity;hydraulicjetting;jetting;mechanicalsurging;monitoringwell;over-pumpingandbackwashing;representativesample;welldevelopment
【摘要】:Aproperlydesigned,installed,anddevelopedground-watermonitoringwell,constructedinaccordancewithPracticeD5092shouldprovidethefollowing:representativesamplesofgroundwaterthatcanbeanalyzedtodeterminephysicalpropertiesandwater-qualityparametersofthesampleorpotentiometriclevelsthatarerepresentativeofthetotalhydraulicheadofthatportionoftheaquiferscreenedbythewell,orboth.Suchawellmayalsobeutilizedforconductingaquifertestsusedforthepurposeofdeterminingthehydraulicpropertiesofthegeologicmaterialsinwhichthewellhasbeencompleted.Welldevelopmentisanimportantcomponentofmonitoringwellcompletion.Monitoringwellsinstalledinaquifersshouldbesufficientlydevelopedtoensurethattheyservetheirintendedobjectives.Welldevelopmentmethodsvarywiththephysicalcharacteristicsofthegeologicformationinwhichthemonitoringwellisscreened,theconstructiondetailsofthewell,thedrillingmethodusedduringtheconstructionoftheboreholeinwhichthewellisinstalled,andthequalityofthewater.Thedevelopmentmethodforeachindividualmonitoringwellshouldbeselectedfromamongtheseveralmethodsdescribedinthisguideandshouldbeemployedbythewellconstructioncontractororthepersonresponsibleformonitoringwellcompletion.Theimportanceofwelldevelopmentinmonitoringwellscannotbeoverestimated;alltoooftendevelopmentisnotperformedoriscarriedoutinadequately.Properandcarefulwelldevelopmentwillimprovetheabilityofmostmonitoringwellstoproviderepresentative,unbiasedchemicalandhydraulicdata.Theadditionaltimeandmoneyspentperformingthisimportantstepinmonitoringwellcompletionwillminimizethepotentialfordamagingpumpingequipmentandin-situsensors,andincreasetheprobabilitythatground-watersamplesarerepresentativeofwatercontainedinthemonitoredformation.1.1Thisguidecoversthedevelopmentofscreenedwellsinstalledforthepurposeofobtainingrepresentativeground-waterinformationandwaterqualitysamplesfromgranularaquifers,thoughthemethodsdescribedhereincouldalsobeappliedtowellsusedforotherpurposes.Otherwell-developmentmethodsthatareusedexclusivelyinopen-boreholebedrockwellsarenotdescribedinthisguide.1.2Theapplicationsandlimitationsofthemethodsdescribedinthisguidearebasedontheassumptionthattheprimaryobjectiveofthemonitoringwellstowhichthemethodsareappliedistoobtainrepresentativewaterqualitysamplesfromaquifers.Screenedmonitoringwellsdevelopedusingthemethodsdescribedinthisguideshouldyieldrelativelysediment-freesamplesfromgranularaquifermaterials,rangingfromgravelstosiltysands.Whilemanymonitoringwellsareconsidered"small-diameter"wells(thatis,lessthanfourinchesininsidediameter),someofthetechniquesdescribedinthisguidewillbemoreeasilyappliedtolarge-diameterwells(thatis,four-inchesorgreaterininsidediameter).1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.Allotherunitsinparenthesesareprovidedforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthisguidemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepresentorreplac......
【中国标准分类号】:P13
【国际标准分类号】:
【页数】:17P.;A4
【正文语种】: