Current practice in Australia for the design of piped urban drainage systems is to consider flow in the pipe as being steady with the pipe flowing full and under pressure; an approach recommended by both Argue (1986) and O'Loughlin and Robinson (1987). The suggested advantages for the currently recommended approach include the inclusion of:

Inherent in this approach, as discussed by Ball (2001), is the assumption that the drainage flows can enter freely the subsurface drainage network. Factors that may negate this assumption include:

Since the last revision of Australian Rainfall and Runoff there have been a number of studies examined these issues with a resultant need to incorporate the results of these studies into Australian Rainfall and Runoff.

Project Start: Stage 1 2008

Project Finish: Mid 2012

Contractor: Cardno

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Flooding in the Mackay catchment