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4. HYDRAULICS <br />IBO TTrr <br />168 I <br />156 <br />1aa <br />132 <br />120 u <br />0 <br />a <br />108 a <br />0 <br />-~ 96 ~ <br />N <br />84 <br />I <br />72 <br />c <br />60 <br />54 <br />i <br />~ B. <br />U <br />0 <br />42 <br />d <br />E <br />c 36 <br />33 <br />30 <br />u <br />v <br />'^ 27 <br />v <br />v <br />~ 2a <br />rn <br />O <br />U 21 <br />v <br />`0 <br />v <br />~ IB <br />a <br />rn <br />15 <br />-- 1 z <br /> IlJY I I <br /> '~E <br /> CS~~rzo ~~ <br /> ~c~uirc~ Flow = 120 cFs <br />:~ <br />10,000 <br />e,ooD LOSS COEFFICIENT Ke ( I) <br /> FOR VARIOUS ENTRANCE (2) ~ ) <br />6,00o TYPES 6. t <br />' <br />5,oop (3) i <br />a,oaD HW ENTRANCE <br />SCALE <br />COEFFICIENT 5, 6. ~, <br /> p <br />TYPE I <br />3,000 6, - <br /> (I) Head..vll, sq. edge: or End 0.3 ~ <br />2 000 Section conforming to fill <br />l $, ~ <br /> s <br />ope a <br /> ID Mitmed rv ronform ro ilops 0.7 - <br />` <br /> 101 Projecting from IIII I 0.9 3. 4. <br />1,000 3. <br />~ <br />~ <br />BOO 3. .. <br />_f <br /> Tv v+a stole 121 0. l7) proiect ' ~ <br />600 horisonrvllY to ¢vle I) ), then <br />2 <br />) <br /> use prvight inclined line through . ' __ <br />SOO D and Q males, ar .e.. r+e o+ ~ ^ <br />400 illunrvled. <br />2. <br />2. ~ <br /> <br />~ <br />700 - <br /> 3 1.5 i - <br />i- <br />1= <br />n = 1.5 1.5 1 <br />- v <br />i= <br /> <br />O v <br />{ <br /> <br />m 100 c ~ <br /> 80 ~ <br />L -~ ~+e4`lE C <br />80` <br />~ <br />v ~~ ~ 1.0 1,0 ~ <br />'^ SO - ~ <br /> 0 <br /> 40 EXAMPLE 1 <br />1 <br /> ~ <br />30 Oigm. (D1=48in,=oft .9 .9 - ~ <br />- <br /> a <br />0=70 ft3/sec 3 <br />0.9 ~ <br />- <br /> ____________ -p <br />20 a ! 20 <br />~ <br />Scale Hw pay = 0.6 0.8 <br />D O6 <br />I1) 1.0 Loh - <br />1 O l21 1.0 t.0 <br />(A 1.t ~.~ 0.7 0.7 <br />B <br />0.7 <br />6 <br />7 <br />a O.fi 0.6 <br />3 0.6 <br />z <br />0.5 <br />t.0 0.5 <br />HEADWATER DEPTH FOR <br />CORRUGATED STEEL PIPE CULVERTS <br />WITH INLET CONTROL <br />FHWA HEC 5 <br />Flgure 4-28 Inlet control nomograph for corrugated steel pipe culverts. The manu- <br />facturers recommended keeping HWID to a maximum of t.5 and preferably to no <br />more than 1.0. <br />i <br />i j ~ <br />1 <br />! ' ~ <br />i <br />I~ <br />i <br />II <br />i i <br />