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Manning Formula Uniform pipe Flow at Given Slope and th <br />Printable Title <br />Printable Subtitle <br />Inputs <br />i.030F cfs Y <br />2.0959 ft/sec -Pipe diameter, ds 5.35 in v /elocity 1.8193 in H2O v <br />Manning roughness,j 0.012 Flow are,J.0147 ft2 v <br />Pressure slope (possibly ? equal to pipe slope), Se ,/O.OZ ) rise/run v //etted p$rimeter 1.3546 f[w <br />-lrrlrar rlir radius ).041 ftPercent of (or ratio to) full depth (.100% or 1 if flowing full 15 Yo Top width T 1.3184 ftw <br />Froude nilmber, F 1.72 <br />Average hear stress (tractive fc ce), tau 0.0517 Psf v <br />/\fl\/\V/ <br />=Ez <br />,tes: <br />is is the flow and depth insrde the pipe. <br />rtting the flow into the pipe may require significanfly higher headwater depth. Add at least 1 <br />see my*2:mi[ule-lule.rial for standard culvert headwater calculations using Hy-8. <br />15 times the velocity to get the headwater depth <br />This is <br />Getting <br />or see I <br />1t1