2.0

Table Of Contents
Chapter 5 Working with Hydrology Commands
504
The following illustration shows elliptical pipe values:
Elliptical pipe values
3
In the Flowrate box, type a flow rate for the pipe (unless you are solving for the
flowrate).
4
In the Slope box, type a slope for the pipe (unless you are solving for the slope).
You can also click the Select button to specify the slope by selecting points on
the drawing.
5
In the Mannings n box, type a roughness value for the pipe (unless you are
solving for the Mannings n). You can also click the Select button to select a
coefficient from the Pipe - Mannings n dialog box.
6
In the Depth of Flow box, type a flow depth for the pipe (unless you are solving
for the depth of flow).
7
In the Minor Axis box, type a length for the vertical (Minor) axis.
8
In the Major Axis box, type a length for the horizontal (Major) axis.
The box in the top-right area of the dialog box displays a graphic of the
currently defined pipe. Based on the values that you entered, information about
the pipe is calculated and displayed at the bottom left of the dialog box. This
information is for display only and cannot be edited.
The Percent Full value is calculated using the following formula:
IXOO
GHSWK RI IORZ
KHLJKW
u


NOTE
If the data you entered has an error, the pipe graphic image does not
display. Check for an error message at the bottom of the dialog box.
9
Click OK to exit the dialog box.