Cookies need to be enabled in your Internet browser in order for you to use IFD website. Please check the browser Settings option to enable cookies.
About the 2016 IFDs
The 2016 IFDs provided here are:
- based on a more extensive data base, with more than 30 years of additional rainfall data and data from extra rainfall stations;
- more accurate estimates, combining contemporary statistical analysis and techniques with an expanded rainfall database; and
- better estimates of the 2% and 1% annual exceedance probability IFDs than the interim 2013 IFDs.
By combining contemporary statistical analyses and techniques with an expanded database, the new 2016 IFDs provide more accurate design rainfall estimates for Australia.
Note: The 2016 IFDs replace both the ARR87 IFDs and the interim 2013 IFDs.