Is it possible to change or adjust the IDF Curve Equation or the IDF Table Equation used in the Storm Events dialog?
It is not possible to make a change the IDF curve equation or table equation, as they are hard-coded into the program.
If you have a different equation, it is recommended to use Excel to calculate the intensity values, and then use those values to create a User Defined IDF Table.
Here are two ways this can be done.
1. Use Excel to calculate the intensity values.
2. Copy the values from Excel.
3. Paste them into the User Defined IDF Table in the Storm Data dialog.
Excel files can be saved in a .txt or .csv format, which can be imported into the IDF table using the steps in the following link: What is the expected text file format for IDF import?
IDF Equation Coefficients: E, B, D vs A, B, N
Import IDF Equation Storm Data
Copy and paste (import or export) tabular data
IDF Curve Equation_StormCAD