The IDF Table or Curve is intended to only work with the Rational Method Hydrology:
- You make a Curve called Reserved
- The X column is time in Minutes
- The Y column is either Intensity in inches/hour or millimeters per hour
- If you use the Modified Rational Method the IDF Curve is called from the Rainfall Type Dropdown menu under MRM Rainfall Type
- The duration is entered in the MRM Duration row. The program will extract the intensity from the X, Y values of the Reserved IDF Curve Type.