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Table Of Contents
Calculating Channel Values
473
Displaying the Calculated Critical Values
Critical depth is the depth of flow in an open channel for which specific energy
is at a minimum value. While in any of the channel calculator dialog boxes, you
can view the calculated critical depth value of a channel by clicking the Critical
button at the bottom of the dialog box.
To display the calculated critical values of a channel
1 Click Critical at the bottom of the Channel Calculator dialog box to display the
Critical Information dialog box. This dialog box is for display only.
2 Click OK to return to the Channel Calculator dialog box.
Specifying a Slope
When using the hydrology calculators, you can either type a slope value or
select a slope from the drawing.
To specify a slope from a hydrology calculator
1 In a calculator dialog box, click the Select button next to the Slope box.
The calculator dialog box closes temporarily and the following prompt is
displayed at the command line:
Select first point (or Dtm):
2 Select the first point where you want the slope to begin or type Dtm, and then
select a point. The elevation is determined from a terrain model surface.
The following prompt is displayed:
Select second point:
3 Select the second point where you want the slope to end.
The calculator dialog box displays and the value of the slope you selected is
displayed in the Slope box.