Laserfiche WebLink
<br />Page 45 <br /> <br />3- <br /> <br />HIOO = 2,6 <br />--------~---------------------------- <br /> <br /> <br />w <br />~ <br /><J: <br />I- <br />en <br /> <br />2- __h_~p_=_~,_8_ h___ <br /> <br />1- <br /> <br /> <br />5000 <br /> <br />10000 <br />STORA G E <br /> <br />15000 <br /> <br />20000 <br /> <br />0- <br /> <br />Find Diameter of Outlet @ Q5 <br /> <br />HS = 1.8' <br /> <br />Qs = 0,70 cfs <br /> <br />for this depth and discharge, inlet control nomographs are not applicable, <br />therefore, use orifice equation <br /> <br />Q = .6A I\,I2gh <br /> <br />A = Trn2 <br />~ <br /> <br />Try <br /> <br />h = <br />Q= <br /> <br />,9H 2 2 <br />,6 x rr x D x ~2 x 32,2 x ,9 x 1,8 = 4.82D <br />4 <br /> <br />D = <br /> <br />(0, 70 \!:;= <br />4,82/ <br /> <br />,38 ft, <br /> <br />4,7" use 4~" <br /> <br />h = 1,8 - .19 = .89 say OK <br />H 1.8 <br /> <br />use 4~" Ii' orifice <br /> <br />For Q100 = 3,5 cfs <br /> <br />H = 2,6' <br /> <br />Using inlet <br />Trial <br />1 <br /> <br />control nomographs for Rep <br />Q Pipe Dia. <br />3,5 12 <br /> <br />HID <br />1.4 <br /> <br />H <br />1.4 <br /> <br />Since H ~ 2.6 is large than 1,4, Q is more than 3,S cfs <br /> <br />Must use: <br />a) restricter plate and orifice cales <br />or b) wier control <br /> <br />If a restricter plate was used, we would calculate the size as before, <br />