Can the extreme flow factor be reported?

  Applies To 
  Product(s): Bentley SewerCAD, Bentley SewerGEMS
  Version(s): 08.11.XX.XX
  Area:  Layout and Data Input
  Original Author: Jesse Dringoli, Bentley Technical Support Group

Problem

Can the extreme flow factor be reported?

How can I see the extreme flow / peak factor at every manhole or pipe?

Area: Output/Results Presentation, Problem ID#: 47629

Solution

The extreme flow factor is not reported anywhere in the current version
of SewerCAD. This is something that has been previously requested and is
currently being considered for future versions. The difficulty
in doing this is that you can have multiple different types of unit
loads in a given model and each can have its own extreme flow factor
method applied (via the extreme flow setup dialog). Therefore you may not have a
one single factor for a given element.

In the meantime, if you have just a single extreme flow factor method,
you can calculate the extreme flow factor at each point in the network
by doing this:

1. Run a steady state simulation without the extreme flow factors
applied (for example make a EFF setup with all unit loads set to a
constant 1.00)


2. Copy the pipe flows (or manhole flow) from the flextable to a
spreadsheet


3. Compute the model again with the desired extreme flow factors


4. Copy the flow column of the flexable to the spreadsheet


5. Use a function to compute the extreme flow factor at each pipe by
dividing the flow from the second run (with the extreme flow method
applied) by the flow from the first run (with no extreme flow method
applied).

Anonymous
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