2.0

Table Of Contents
Calculating Channel Values
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To calculate the rectangular channel values
1 From the Hydrology menu, choose Channels ä Advanced to display the
Advanced Channel Calculator dialog box.
2 From the Solve For list, select the channel value you want to calculate.
The available values are: Flowrate, Slope, Mannings n, and Depth of Flow.
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 Select the Critical Depth Check check box to have a warning message box
display if the flow depth is below the critical depth.
4 In the Flowrate box, type a flow rate for the channel.
5 In the Slope box, type a slope for the channel. You can also click Select to
specify the slope by selecting points on the drawing.
6 In the Mannings n box, type a roughness value for the channel lining material.
You can also click Select to select a coefficient from the Channel - Mannings n
dialog box.
7 In the Flow Depth box, type a flow depth for the channel.
8 In the Height box, type a height for the channel.
9 In the Bottom Width box, type a bottom width for the channel.
10 In the Left Radius and Right Radius boxes, type a left and a right radius value.
These values can be zero.