【英文标准名称】:StandardTestMethodforIndirectMeasurementsofDischargebyStep-BackwaterMethod
【原文标准名称】:步进回水法间接测量放电的试验方法
【标准号】:ASTMD5388-1993(2007)
【标准状态】:现行
【国别】:
【发布日期】:1993
【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】:放电;试验;电气工程
【英文主题词】:flood;openchannelflow;waterdischarge
【摘要】:Thistestmethodisparticularlyusefulfordeterminingthedischargewhenitcannotbemeasureddirectly(suchasduringhighflowconditions)bysometypeofcurrentmetertoobtainvelocitiesandwithsoundingweightstodeterminethecrosssection(refertoTestMethodD3858).Thistestmethodrequiresonlyonehigh-waterelevation,unliketheslope-areatestmethodthatrequiresnumeroushigh-watermarkstodefinethefallinthereach.Itcanbeusedtodetermineastage-dischargerelationwithoutneedingdatafromseveralhigh-waterevents.5.1.1Theuserisencouragedtoverifythetheoreticalstage-dischargerelationwithdirectcurrent-metermeasurementswhenpossible.5.1.2Todeveloparatingcurve,plotstageversusdischargeforseveraldischargesandtheircomputedstagesonaratingcurvetogetherwithdirectcurrent-metermeasurements.1.1Thistestmethodcoversthecomputationofdischargeofwaterinopenchannelsorstreamsusingrepresentativecross-sectionalcharacteristics,thewater-surfaceelevationoftheupstream-mostcrosssection,andcoefficientsofchannelroughnessasinputtogradually-variedflowcomputations.1.2Thistestmethodproducesanindirectmeasurementofthedischargeforoneflowevent,usuallyaspecificflood.Thecomputeddischargemaybeusedtodefineapointonthestage-dischargerelation.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A42
【国际标准分类号】:17_220_20
【页数】:4P.;A4
【正文语种】: