ASTM D5129-1995(2003) 使用收缩宽度法迂回测量明渠水流流量的标准试验方法

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【英文标准名称】:StandardTestMethodforOpenChannelFlowMeasurementofWaterIndirectlybyUsingWidthContractions
【原文标准名称】:使用收缩宽度法迂回测量明渠水流流量的标准试验方法
【标准号】:ASTMD5129-1995(2003)
【标准状态】:现行
【国别】:
【发布日期】:1995
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D19.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:喷管流量;测量
【英文主题词】:flood;openchannelflow;waterdischarge
【摘要】:Thistestmethodisparticularlyusefultodeterminethedischargewhenitcannotbemeasureddirectlybysometypeofcurrentmetertoobtainvelocitiesandwithsoundingweightstodeterminethecrosssection.Evenunderthebestconditions,thepersonnelavailablecannotcoverallpointsofinterestduringamajorflood.Theengineerortechniciancannotalwaysobtainreliableresultsbydirectmethodsifthestageisrisingorfallingveryrapidly,ifflowingiceordebrisinterfereswithdepthorvelocitymeasurements,orifthecrosssectionofanalluvialchannelisscouringorfillingsignificantly.Undertheworstconditions,accessroadsareblocked,cablewaysandbridgesmaybewashedout,andknowledgeofthefloodfrequentlycomestoolate.Therefore,sometypeofindirectmeasurementisnecessary.Thecontracted-openingmethodiscommonlyusedonvalley-floorstreams.1.1Thistestmethodcoversthecomputationofdischarge(thevolumerateofflow)ofwaterinopenchannelsorstreamsusingbridgesthatcausewidthcontractionsasmeteringdevices.1.2Thistestmethodproducesthemaximumdischargeforoneflowevent,usuallyaspecificflood.Thecomputeddischargemaybeusedtohelpdefinethehigh-waterportionofastage-dischargerelation.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A52
【国际标准分类号】:
【页数】:42P.;A4
【正文语种】: