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i <br /> � , . <br /> p . � � <br /> Due to the minimal artaunt of space behveen the top orifice and riser top on the contrd stnx:ture <br /> � ` <br /> , an <br /> elbow orifice will not wotk. This ca�uletion converts an elbow or�ce diameter to e r,otch wier. <br /> [ BAFFLE <br /> ' H.. <br /> BAFFLE e , <br /> TOP ORIFICE <br /> ' (NOTCH WE�!2) <br /> RISER P H� <br /> f �I PIPE OUTLET <br /> � BOT70M ORIFlCE <br /> IQ�VN1 Va�UM: ' • <br /> HR=- "'8;5 ` Riser Hefght(feet) <br /> P= 6.3 Stage Height of Top Orificb (feet) <br /> � Dia,,,�.= 8:37 Top Orifice Diameter(inches) <br /> � Glculatlons: <br /> Area ol given orilk;e diameter(in2 J. <br /> � A„�.= 55.02 = n (Diao,�./2)z <br /> Height ol notch weir(R). <br /> H,„,= 0.2 = H,-P <br /> � Flow through orifice(cls). where: <br /> � ��= 0.85 = CA(2gH,„,)12 C is the orifice contraction coefficieM <br /> C= ;O.s82 <br /> Aa,�,is the orifice area(fl�) <br /> � Ao,ni,.= 0.3821 <br /> g is gravity(fNsZ) <br /> 9= 32.2 <br /> 1 H,,,,is the lieight of notch weir(ft) <br /> H,,,,.= 0.2 <br /> contlnued nazf <br /> I <br /> � � <br /> ' NotchWeir.xls 7/18/00 <br />