![]() ![]() Ke = loss coefficient for pipe entranceĪ spreadsheet screenshot for pipe culvert design calculations.V = velocity in the culvert barrel, ft/sec or m/s.P = perimeter of the culvert barrel, ft or m.A = cross-sectional area of the culvert barrel (ft 2 – U.S.R = hydraulic radius of the full culvert barrel = A/P (ft – U.S.L = length of the culvert barrel (ft – U.S.n = Manning roughness coefficient for the culvert material.h L = the head loss in the culvert barrel for full pipe flow (ft – U.S. ![]() Pipe Culvert Outlet Control Design CalculationsĪn equation that relates culvert parameters for outlet control conditions in a pipe culvert design spreadsheet is: ![]()
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