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<br />0=0.64 cis <br />Outlet = 6 inch iron pipe <br />Qp=Maximum quantity for a 6 inch iron pipe in cis <br />Vavg=Average velocity in ft/sec <br />r=d/4 for round pipes ilouing full <br />s~=Head loss per foot of pipe = 0.0015 <br />C=constant for Haz1n-Williams Formula for iron pipe = 100 <br />~.' ~t i ~ ~ O. ~'1' <br />Vavg=Cr('s 0.001 (Hazln-Williams Formula) <br />Vavg=3.77ft/sec <br />O=VR=V(r1Y)=3.77ft/secC0.25ftk ) <br />D=0.74cis <br />P CI I~ID R <br />Gate Opening For Average Retention Period of 24 Hours: <br />10 year-24 hour event = 0.45 ac-ft <br />• 0=(0.45ae-ft t 43560ft/ae)/(46hourst3600sec.'hour~) <br />D=O.ilcfs <br />Head=3.29 feet, Havg=1.7 feet <br />L <br />Havg =Hg =Kg (V2G ) <br />V= (Hav9t2~ g <br />V= < # t )/5 <br />Vavg=1.4 ft/sec <br />Kg=56 13% Opening = 1.5 inches <br />ChecK: O=VRi R=QN=O.IIcfs/1.4 ft/sec=0.06ft = 1.2 inches <br />Gate Opening For Average Retention Period of 24 Hours: <br />10 year-24 hour event =3.24 ac-ft <br />0=(3.24ac-fts43560ft/ac)/(49hourss36005ecs/hour) <br />0=0.82cfs <br />Head =6892.4 - 6686 = 6.4ft: Havg=3.2ft <br />• Havg=Hg =Kg CVz/2G) <br /> <br />