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Table Of Contents
Chapter 5 Working with Hydrology Commands
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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.
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.
Calculating the Flow for Custom Pipes Using the
Darcy-Weisbach Equations
To calculate the flow for custom pipes using the Darcy-Weisbach equations
1 From the Hydrology menu, choose Pipes ä Darcy-Weisbach User to display the
Darcy-Weisbach dialog box.
2 From the Solve For list, select the value you want to calculate. The available
values are: Flowrate, Headloss, Friction Factor, Area, Perimeter, and Length.
NOTE
Do not enter the value for which you are solving. For example, if you select
Flowrate in this step, leave the Flowrate text box at 0. After you enter the
other values, the program solves for the Flowrate.
3 In the Flowrate box, type a flow rate for the pipe (unless you are solving for the
flowrate).
4 In the Headloss box, type a value to account for headloss (unless you are solving
for the headloss).
You can also click Select to specify the headloss value by selecting an object or
points on the drawing. For more information, see Specifying a Headloss Value
in this chapter.
5 In the Friction Factor box, type a friction factor value for the selected pipe
(unless you are solving for the friction factor).
You can also click Select to display the Darcy-Weisbach Friction Factors dialog
box and select a coefficient. This dialog box describes the pipe and the
coefficient value of the pipe. For more information, see Specifying a Darcy
Weisbach Roughness Coefficient in this chapter.
6 In the Area box, type an area for the pipe (unless you are solving for the area).
7 In the Perimeter box, type a perimeter for the pipe (unless you are solving for
the perimeter).
8 In the Length box, type a length for the pipe (unless you are solving for the
length).
You can also click Select to specify the length by selecting an object or points
on the drawing. For more information, see Specifying a Length in this
chapter.
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