Free Online Manning Formula Trapezoidal Channel Calculator

Manning Formula Uniform Trapezoidal Channel Flow at Given Slope and Depth

Bottom width
Side slope 1 (horizontal / vertical)
Side slope 2 (horizontal / vertical)
Manning roughness, n ?
Channel slope
Flow depth

Results:

Flow area	Flow area
Wetted perimeter	Wetted perimeter
Hydraulic radius	Hydraulic radius
Velocity, v	Velocity, v
Flow, q	Flow, q
Velocity head, h_v	Velocity head, h_v
Top width, T	Top width, T
Froude number, F	Froude number, F
Shear stress (tractive force), tau	Shear stress (tractive force), tau