【英文标准名称】:StandardTestMethod(AnalyticalProcedure)forDeterminingtheEfficiencyofaProductionWellinaConfinedAquiferfromaConstantRatePumpingTest
【原文标准名称】:通过一连续比率的泵试验对限制性含水层内生产井效率测定的标准试验方法(分析方法)
【标准号】:ASTMD6034-1996(2010)e1
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:anisotropy;aquifers;aquifertests;controlwells;groundwater;hydraulicconductivity;observationwells;storagecoefficient;transmissivity;wellefficiency;Transmissivity;Wellefficiency;Anisotropy;Aquifers;Controlwells;Groundwater;H
【摘要】:Thistestmethodallowstheusertocomputethetruehydraulicefficiencyofapumpedwellinaconfinedaquiferfromaconstantratepumpingtest.Theproceduresdescribedconstitutetheonlyvalidmethodofdeterminingwellefficiency.Somepractitionershaveconfusedwellefficiencywithpercentageofheadlossassociatedwithlaminarflow,aparametercommonlydeterminedfromastep-drawdowntest.Wellefficiency,however,cannotbedeterminedfromastep-drawdowntestbutonlycanbedeterminedfromaconstantratetest.Assumptions:Controlwelldischargesataconstantrate,Q.Controlwellisofinfinitesimaldiameter.Dataareobtainedfromthecontrolwelland,ifavailable,anumberofobservationwells.Theaquiferisconfined,homogeneous,andareallyextensive.Theaquifermaybeanisotropic,andifso,thedirectionsofmaximumandminimumhydraulicconductivityarehorizontalandvertical,respectively.Dischargefromthewellisderivedexclusivelyfromstorageintheaquifer.CalculationRequirements8212;Forthespecialcaseofpartiallypenetratingwells,applicationofthistestmethodmaybecomputationallyintensive.ThefunctionfsshowninEq6mustbeevaluatedusingarbitraryinputparameters.Itisnotpracticaltouseexisting,somewhatlimited,tablesofvaluesforfsand,becausethisequationisratherformidable,itisnotreadilytractablebyhand.Becauseofthis,itisassumedthepractitionerusingthistestmethodwillhaveavailableacomputerizedprocedureforevaluatingthefunctionfs.Thiscanbeaccomplishedusingcommerciallyavailablemathematicalsoftwareincludingsomespreadsheetapplicationsorbywritingprogramsinlanguages,suchasFortranorC.Ifcalculatingfsisnotpractical,itispossibletosubstitutetheKozenyequationfortheHantushequationaspreviouslydescribed.1.1Thistestmethoddescribesananalyticalprocedurefordeterminingthehydraulicefficiencyofaproductionwellinaconfinedaquifer.Itinvolvescomparingtheactualdrawdowninthewelltothetheoreticalminimumdrawdownachievableandisbasedupondataandaquifercoefficientsobtainedfromaconstantratepumpingtest.1.2Thisanalyticalprocedureisusedinconjunctionwiththefieldprocedure,TestMethodD4050.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard,exceptasnotedbelow.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunits,whichareprovidedforinformationonlyandarenotconsideredstandard.1.3.1Thegravitationalsystemofinch-poundunitsisusedwhendealingwithinch-poundunits.Inthissystem,thepound(lbf)representsaunitofforce(weight),whiletheunitformassisslugs.1.4Limitations8212;Thelimitationsofthetechniquefordeterminationofwellefficiencyarerelatedprimarilytothecorrespondencebetweenthefieldsituationandthesimplifyingassumptionofthistestmethod.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:93_160
【页数】:8P.;A4
【正文语种】:英语