depth of flow
depth of flow
(OP)
Hi, I am trying to work out the depth of flow in a pipe. I have the velocity, pipe gradient, pipe diameter, and flow entering the pipe. I know the depth of flow must be <0.75 diameter and I just need to put all into a spreedsheet for ease of calculation.
Thanks for the help!
Thanks for the help!





RE: depth of flow
RE: depth of flow
please note this is a circular pvc pipe part of a network
Thanks for the help!
RE: depth of flow
RE: depth of flow
You can download from FHWA Visual Urban. This program will provide you with normal depth in a circular section. Also you can refer to nomographs of partialy full pipes. These can be found in hydraulic text books. Find d/Dfull vs. v/Vfull etc....
Or as chicopee stated crunch out manning's by hand. Here are eqns. for circular section.
z=D/2-y: z is distance from center of pipe to water surface
y is depth of flow
x=cos^-1(z/r): x is angle from horz to watersurface
A=D^2/4: A area of flow
P=Dx: Wetted Perimeter
R=A/P:Hydraulic Radius
Q=1.49/n A R^(2/3) S^(1/2): Manning's Eqn.
Good Luck!, I wrote a visual basic routine to compute this.
RE: depth of flow
see if my quick calculator helps at
www.hydrocalc.com