PROJECT 1 - DEVELOPMENT OF INTENSITY FREQUENCY DURATION INFORMATION ACROSS AUSTRALIA

Detailed IFD relationships across the country were last investigated prior to the publication of the 1987 edition of Australian Rainfall and Runoff. These design IFD relationships across the country were determined using the rainfall data recorded up to 1983. For the analysis it was assumed that the statistical distribution for the developed series was a Log Pearson Type III, skew of the record was a regional feature and could be applied to all durations and frequencies, the data sample at each location was representative of the long-term conditions at that station, and climatic trends had negligible effect on the intensities.

Since these data records were analysed, techniques for dissemination of information have changed, the length of data record has increased, new techniques for estimation of the statistical properties of the rainfall have been developed, and the needs of the profession for IFD related information have changed.

Project Start: Stage 1 2008

Project Finish: Mid 2014

Contractor: Bureau of Meteorology

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Flooding in the Mackay catchment