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1、BulletinNo.552February1976MEASUREMENTDorrcllC.LarsenCOOPERATIVEEXTENSIONSERVICEUniversityotIdaho--CollegeofAgricultureReprinted1992withpermissiontheUniversityofidahoSPONSOREDBYU.S.BUREAUOFRECLAMATIONIDAHOWATERUSERSASSOCiATiONIDAHODEPARTMENTOFWATERRES
2、OURCESAcknowledgmentsThoauthorgratefullyacknowlcdgcsthecontributionstothispublicationmadebyAllanS.HumphreysandA.R.Robinson,AgriculturalEngineerswiththeAgriculturalRe-searchService,USDA:L.R.Swarner,AgriculturalEngineer,BureauofReclamation,andD.W.Fitzs
3、immons,Head,De-partmentofAgriculturalEngineering,UniversityofIdaho.TheUniversityofIdahoCollegeofAgricultureBulletinNo.552hasbeenreprintedtoprovideageneralreferenceofwatermeasurementdevicescommonlyusedinldahoandtoprovidesupplementalmaterialforawaterme
4、asurementvideosponsoredjointlybytheUSBureauofReclamation,theIdahoDepartmentofWaterResourcesandtheIdahoWaterUsersAssociation.ExcerptsfromolhcrpublicationshavebeenaddedforseveralmeasuringstructureswhichareshowninthevideobutnotcoveredintheUniversityofId
5、ahoBulletin.Copiesofthevideo,"Let'sMeasureUp",maybeobtainedthroughtheldahoWaterUsersAssociation.Thesponsors'directoryisincludedinthemanual.Issuedinfurtheranceofcooperativeextensionworkinogric~ltureendhomeeconomics,ACTSofMoy8ondJune30.1914,incaapeioti
6、onwiththeU.S.DeportmentofAgriculture.Jornes1.Graver.DirectorofCooperoliveExtensionService.UniversityofIdaho.Moscow,idoho83843.Weofferourprogramsandfocilitierto011peoplewithoutregardtoroce.creed.coior,sex,ornotionalorigin.ContentsOpenflowmeasuringdevi
7、cesWeirs6Rectangularsubmergedoriiict:9FlumesParshallflume11Trapezoidalflume15Deflectionmeters17ClosedflowmeasuringdevicesPropellermeter18Pitottube19Pipeorifice20Equivalentunitsofwatermeaaurrrrreal45ListofTablesTable1.EquivalentratesofflowTable2.Depth
8、ofwaterappliedbyvariousflows,timeandacresTable3.FlowoverrectangularcontractedweirsincubicfeetpersecondTable4.FlowoverCipollettiweirsincubicfeetpersecondTable5.Flowover90'V-notchweirsincubicfeetpersecondTable6.Flowthroughrectangularsubmergedorificesin
