Extreme Flows Dialog

This dialog box allows you to create, edit, and view extreme flow factors. The dialog box contains a toolbar, an Extreme Flows list pane, and two tabs. The toolbar contains the following buttons:

New	Creates a new entry in the Extreme Flows List Pane.
Duplicate	Creates a copy of the currently highlighted entry in the Extreme Flows List Pane.
Delete	Deletes the entry that is currently highlighted in the Extreme Flows List Pane.
Rename	Lets you rename the entry that is currently highlighted in the Extreme Flows List Pane.
Report	Lets you generate a preformatted report that contains the input data associated with the entry that is currently highlighted in the Extreme Flows List Pane.
Synchronize	Clicking this button opens a submenu containing the following commands: Browse Engineering Library —This command opens the Engineering Library manager dialog, allowing you to browse the Extreme Flow Factor Methods Library. Synchronize From Library —This command allows you to update a Extreme Flow Factor Method that was previously imported from a Extreme Flow Factor Methods Engineering Library to reflect changes that have been made to the library since it was imported. Synchronize To Library —This command allows you to update an existing Extreme Flow Factor Methods Engineering Library using current Extreme Flow Factor Method entries that were initially imported but have since been modified. Import From Library —This command allows you to import catalog entries from an existing Extreme Flow Factor Methods Engineering Library. Export To Library —This command allows you to export the current catalog entries to an existing Extreme Flow Factor Methods Engineering Library.

The following table describes the rest of the controls in the Extreme Flows dialog box.


Extreme Flows List Pane	Located on the left side of the dialog box, displays a list of all of the extreme flow factors that have been defined in the current model. Highlighting an extreme flow factor in this list causes the Table or Equation sections to display the data associated with the highlighted extreme flow factor.
Table Section	When a Table-based Extreme Flow factor is highlighted in the Extreme Flows List Pane, this section contains the following controls. Extreme flow factor values that fall outside of the range of boundary values will be assigned the closest in-range value, either the first (lowest) or last (highest) value.
New button	Adds a new row to the table.
Delete button	Removes the currently highlighted row from the table.
Contributing Population column	The contributing population for the associated extreme flow factor value. This column is only available for population-based extreme flow factors.
Base Load column	The base load for the associated extreme flow factor value. This column is only available for load-based extreme flow factors.
Extreme Flow Factor column	The extreme flow factor value associated with the base load or population value.
Equation Section	When an Equation-based Extreme Flow factor is highlighted in the Extreme Flows List Pane, this section contains the following controls.
Population Unit in Equation	The unit in which population is defined. The coefficients in the equation are based on this unit. This column is only available for population-based extreme flow factors.
Flow Unit	The unit in which flow is defined. The coefficients in the equation are based on this unit. This column is only available for load-based extreme flow factors.
Cutoff Value	The maximum possible extreme flow factor for peaking methods. This is used to prevent unrealistically high values for small populations or land areas.
c1	Equation coefficient.
c2	Equation coefficient.
c3	Equation coefficient.
e1	Equation coefficient.
e2	Equation coefficient.
m1	Equation coefficient.
m2	Equation coefficient.
Library Tab	Displays information pertaining to the catalog entry that is currently highlighted in the List Pane, including: ID Label Modified Date Library Source Library Modified Date Synchronization Status

Drainage and Utilities uses a generic exponential equation to define any extreme flow factor method. For population based extreme flow factor methods, the generic equation is:

where P is population and c1, c2, c3, m1, m2, e1, and e2, are constants.

For discharge-based extreme flow factor methods the generic equation is:

where Q is total sanitary (base) load and c1, c2, c3, m1, m2, e1, and e2, are constants.