ASTM D5129-1995(2008) 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(2008)
【标准状态】:现行
【国别】:美国
【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(US-ASTM)
【起草单位】:D19.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:flood;openchannelflow;waterdischarge;Bridgestudies;Classification(standards);Contracted-openingmethod;Crosssectiondata/analysis--water;Dischargemeasurement;Ellipticaldikes;Fieldtesting--water;Floods;Indirectflow/dischargemeasureme
【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-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P12
【国际标准分类号】:
【页数】:42P.;A4
【正文语种】:英语
【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(2008)
【标准状态】:现行
【国别】:美国
【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(US-ASTM)
【起草单位】:D19.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:flood;openchannelflow;waterdischarge;Bridgestudies;Classification(standards);Contracted-openingmethod;Crosssectiondata/analysis--water;Dischargemeasurement;Ellipticaldikes;Fieldtesting--water;Floods;Indirectflow/dischargemeasureme
【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-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P12
【国际标准分类号】:
【页数】:42P.;A4
【正文语种】:英语
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