Frequency relationships should be entered for each project condition-analysis year-impact area combination. To access the options for creating, retrieving or importing frequency functions, from the Study Tree, right-click on Frequency Functions and select the desired shortcut command.

Options for creating, retrieving or importing frequency functions.

The frequency relationships may be one of the three below.  

  1. Analytical flow-frequency function. 
  2. Graphical flow-frequency function. 
  3. Graphical stage-frequency function. 

Frequency Functions FDA icon Please see EM 1110-2-1619, HEC-FDA on Discourse, or speak with HEC about choosing one of the three. Recall that uncertainty in EAD is most sensitive to uncertainty in flow, so we want to include flow in our models if the hydrologic and hydraulic conditions permit.

Users can edit, rename or remove frequency functions. To access the options, from the Study Tree, right-click on the function (e.g., Muncie Example LP3) and select the desired command from the shortcut menu.

Frequency functions edit, remove or rename commands