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Table Of Contents
Chapter 5 Working with Hydrology Commands
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Selecting Riser Points from a Drawing
In the Riser Calculator dialog box, you can click Select next to any of the first
six text boxes to select riser points from the drawing.
To specify distances by selecting riser points from a drawing
1 In the Riser Calculator dialog box, click Select next to one of the first six text
boxes. The Riser Calculator dialog box closes temporarily and the following
prompt is displayed:
Select point (or Dtm):
2 Select the point or type Dtm to select a point from a terrain model surface.
NOTE
When selecting the Pipe Length, you are prompted to select a second
point.
The Riser Calculator dialog box displays and the value you selected is displayed
in the appropriate text box.
3 Click OK to exit the dialog box.
Specifying Pipe Entrance Coefficients
In the Pipe Entrance Coefficient dialog box, you can specify a pipe entrance
coefficient.
To specify a pipe entrance coefficient
1 In the Riser Calculator dialog box, click the Select button next to the Entrance
Coef text box to display the Pipe Entrance Coefficients dialog box.
2 Select a coefficient by placing your cursor in the appropriate column and
clicking anywhere in the text box that contains the value you want to use.
Use the navigation buttons on the right side of the dialog box to move through
the list of descriptions and coefficients.
You can add a new coefficient:
n
Click Insert to add a new row above the row you currently have selected.
n
To add data, select an empty text box, and type the new description and
coefficient.
3 Click OK to return to the Riser Calculator dialog box.
Customizing Riser Diameter and Pipe
Diameter Tables
When you click the Tables button on the Riser Calculator, you can access riser
and pipe diameter tables that you can customize. The Riser Calculator uses these
tables to determine which diameter sizes are available to solve for.
For example, if you dont want the calculator to solve for a 12-inch diameter
pipe, then you can delete that entry from the riser pipe table. The Riser
Calculator uses another pipe diameter that is listed in the table.