This 3-hour intensive training course will see specialist presenters provide information and guidelines for special design applications where floods of low Annual Exceedance Probabilities need to be estimated. Participants will be provided an overview of the procedures available for estimating very rare to extreme floods, estimation of design rainfall and rainfall excess for rarer events, and special requirements for the models used to generate flood hydrographs for very rare to extreme flood events.


Format 3-hour course + pre/post-course materials via the learning platform (30 days access for individual course: FOUR months access for the series)
Cost AUD$250 (includes GST) or combine with the full ARR Series and save 25%
Code OD-21-1-006
Contact training@awschool.com.au
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Rory Nathan

University of Melbourne

Rory is a Professor at the University of Melbourne and has over 40 years’ experience in engineering and environmental hydrology, mostly in industry, and now focuses his time on research and teaching... Read more

David Stephens


David is an associate of HARC, and has nearly 15 years experience in design flood hydrology, hydraulic modelling and dam safety risk assessment. David’s professional experience started with the B... Read more

Matt Scorah


Matt has over five years of experience in hydrology and water resources modelling. Since graduating from the University of Melbourne in 2013, Matt has been heavily involved in the ongoing development ... Read more

Johan Visser

UNSW Sydney

Johan is a PhD Candidate at the Water Research Centre, UNSW Sydney (the University of New South Wales), with previous experience working as a Water Resources and Civil Engineer at Aurecon in Cape Town... Read more

Register for the ENTIRE series and be rewarded with a 25% discount and 4 months unlimited access to all courses in the series.

Or register now for this individual course.

Throughout the course attendees will be shown practical working examples, learning hands-on how to use and apply different rainfall related design inputs, including:

Key concepts/topics covered

  • how to access Very rare rainfalls
  • how to derive extreme event estimates
  • what temporal patterns to use with rare rainfall


Learning objectives

  • understanding of how extreme rainfalls are derived
  • how to derive extreme rainfall for applications including the sizing of spillways for large dams and  design of major structures in flood risk areas


The course is delivered through 5 sequential units via the learning platform

  • 3-hour recording of the live session
  • Pre-and-post-course materials to go through via the learning platform including downloadable course manual.


Australian Rainfall and Runoff (ARR) is the national guideline document, data and software suite for the estimation of design flood characteristics in Australia.

Originally published in 1958 by Engineers Australia, ARR 4th edition was released in 2019 with support of the Commonwealth Government of Australia and Geoscience Australia. With national applicability, balancing the varied climates of Australia, it is a pivotal framework to the safety and sustainability of Australian infrastructure, communities and the environment. The information and the approaches presented in Australian Rainfall and Runoff are essential for policy decisions and projects involving:

  • infrastructure such as roads, rail, airports, bridges, dams, stormwater and sewer systems;
  • town planning;
  • mining;
  • developing flood management plans for urban and rural communities;
  • flood warnings and flood emergency management;
  • operation of regulated river systems; and
  • estimation of extreme flood levels.

ARR 4th edition is a major update to guidelines, the first in 30 years and consists of The Guidelines and associated Data hub and software.

What’s Included

The ARR On-demand Training Series is designed to be taken individually. Each course is highly practical and hands-on (ie; not simply a PowerPoint of lectures), turning ARR policy and research into practice.

To provide the best desired learning outcomes, setup in a quiet space with dual monitors (ie one screen with the session recordings and the other with the software/exercise that attendees can work on simultaneously).

Please note: the courses are not designed for a board-room setup.

Depending on the course, attendees will be developing models, learning software, and working through exercises and case studies. Where relevant, attendees will also have homework between courses.

What’s included within each of the 8 On-demand courses in the series:
  • 3-hours of session recordings to view as many times as required within the allocated time;
  • Ability to ask questions to the presenters at anytime through the learning platform;
  • PDF manual of the course. The manual is recommended for ongoing use;
  • Any working models/ software’s necessary as per instructions in the individual course, downloaded from the learning platform before starting the session recordings;
  • Some courses have exercises / homework to complete between courses;
  • Pre-reading and viewing materials;
  • Ability to access all the online course materials within the allocated time. The pre-readings and manual are available for ongoing learning;
  • Attendees earn CPD hours/points (ie with Engineers Australia) for at least 5 hours per-course (therefore 40+ hours for the Series).



Pre-course reading and video watching is encouraged.



A good internet connection and software and downloads as described in the learning platform. To provide the best desired learning outcomes, setup in a quiet space with dual monitors (ie one screen with the on-demand recording and the other with the software/exercise that attendees can work on simultaneously).


On completion of the course attendees will be issued with a Certificate of Participation.

Refund Policy

Frequently Asked Questions (FAQ)