A series of roadshows have been held around the country to update the industry on the progress made to date. As the presentations are constantly being updated to reflect the most up to date progress only the most recent presentations will be available for download.

At the time that the 1987 Edition of Australian Rainfall and Runoff was prepared, the use and implementation of two-dimensional (2D) models for assessment of flooding in riverine and urban systems was not common and required significant computing power and modelling expertise. Since 1987, the situation has changed considerably with technological advances enabling the implementation of 2D models for flooding assessments. The aim is to develop guidelines for the use of 2D modelling systems in urban environments. It is intended that this project will provide guidance on a number of issues including: There is little guidance, however, about the practical application of 2D models in the 1987 edition of AR&R.

• Model conceptualisation and representation of hydrological and hydraulic processes;
• Influence of the conceptualisation on the input data;
• Parameter estimation and its uncertainty; and
• Predictive uncertainty.

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