2.0

Calculating Weir Values
525
Specifying a Cv Value
The Velocity Coefficients dialog box describes the weir structure and the
associated velocity coefficients of the weir.
To select a coefficient from the dialog box
1 In the Cipolleti Weir Calculator dialog box, click the Select button next to the
Cv text box to display the Velocity 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 Cipolleti Weir Calculator dialog box.
Calculating Rectangular Weir Values
The Weirs
ä
Rectangular command on the Hydrology menu calculates
hydraulic values for suppressed and contracted rectangular weirs. For more
information on the formulas that are used for the Rectangular Weir calculator,
see Rectangular Weir Formulas in this chapter.