2.0

Table Of Contents
Customizing the Pipe and Coefficient Tables
627
Using the Hazen-Williams Formula
Use the Hazen Coefficient dialog box to enter a description and an associated
Hazen-Williams pipe coefficient value. These values are used by the Pipes Run
Editor when calculating flow and sizing pipes.
To use the Hazen coefficient dialog box
1 From the Select Coefficient Table dialog box, click Hazen-Williams Coefficient
to display the Hazen Coefficient dialog box.
For more information, see Customizing the Roughness Coefficient Tables
earlier in this chapter. The Hazen-Williams coefficient data is stored in a file
called hazen.cof, located in the \pipewks folder for the current project. When
you create a new project the hazen.cof file is copied from a sample default file
in the c:\Program Files\Land Desktop R2\land\prot\pipewks\ program folder.
You can use an ASCII text editor to modify this data file as necessary.
2 Use the Description field to type the description for the pipe material.
3 Use the Coefficient field to type the Hazen-Williams roughness coefficient value
for the pipe material.
Use the /\ button to move the cursor up one row, the \/ button to move the
cursor down one row, the PgUp button to move the cursor up one page, and the
PgDn button to move the cursor down one page. Use the Home button to move
the cursor to the first cell, the End button to move the cursor to the last cell,
and the Delete button to delete the row for the current cell.
By entering data for a new row and clicking OK, the new row is saved. Also, if
you change a value and click OK, the hazen.cof file is updated with the new
information.