ADS Environmental Services Profile Software 950015B6 - Manual (Page 241)

Quantity Coefficient Generator 4-19
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Generating Roughness and Slope
When you want to generate Colebrook-White quantities, use the
Quantity Coefficient Generator to develop roughness and slope
values from all of the selected confirmations. You must know at
least one of the variables, roughness or slope, to solve for the other
unknown variable.
Slope is typically a fixed value and can be measured or obtained
from engineering drawings. Roughness values typically can be
determined from published sources containing descriptions and
pictures of pipes with different roughness values. If you can
determine either of these values, you can solve for the other using
the following procedures:
Solving for an Unknown Roughness
Set
button
If you know the pipe slope, the Quantity Coefficient Generator
can solve for the unknown roughness. Perform the following steps
to solve for an unknown roughness:
1. Select the Set toolbar button to display the Set All dialog.
Set all dialog
2. Select the Slope radio button.
3. Enter the known slope value to the dialog.
4. Select OK to exit the dialog.
The Quantity Coefficient Generator calculates roughness values
for each of the confirmations.