Rational Method IDF Curve Dialog Box
This dialog allows you to define intensity-duration-frequency curves. These curves are stored in the Storm Data Engineering Library, and can be used to define Global and local Storm Data (see "Adding Global Storm Data" and "Adding Storm Data" for more information).
The Rational Method IDF Curve dialog box is accessible by clicking the Ellipsis button of the Depths field when a Rational Method IDF Curve entry is highlighted in the Engineering Library explorer pane.
The dialog contains the following controls:
| Return Event | The return event, a value that reflects the average time between similar storm data. |
| Time vs. Intensity table | Allows you to define time vs. depth or time vs. intensity points that describe the current storm data. Which table is displayed in the dialog depends on the Storm Data Type specified in the library entry. |