The new Intensity–Frequency–Duration (IFD) design rainfalls mark the first stage of an extensive Australian Rainfall & Runoff revision project.
While the new IFDs are derived from a longer and more extensive dataset, careful consideration is needed when they are used with 1987 Australia Rainfall and Runoff (AR&R87) design flood estimation techniques.
Guidance has been provided by Engineers Australia.
Should be used for:
- Sensitivity analyses for new design flood studies
- Revised Regional Flood Frequency analysis