The Queensland Government and local councils are working in partnership on a long-term plan to manage the impact of floods and improve community safety and resilience within the Brisbane River catchment.
This work supports recommendation 2.2 from the Queensland Floods Commission of Inquiry that a comprehensive flood study of the Brisbane River catchment be completed as soon as practicable, with the aim of identifying the probability and extent of various floods occurring.
The Brisbane River Catchment Flood study
The Brisbane River Catchment Flood study is the most comprehensive study of its kind to be undertaken in Australia. The Flood Study area includes parts of the Brisbane River catchment, with a focus on flooding events downstream of Wivenhoe Dam including the Brisbane River, Lockyer Creek and the Bremer River system.
Find out more on the Queensland Reconstruction Authority website.
Wivenhoe and Somerset Dams Optimisation Study
As the first output from the Brisbane River catchment studies, the Queensland Government completed the Wivenhoe and Somerset Dams Optimisation Study in 2014. This study presented options for improving the use of existing dam infrastructure to deliver better flood mitigation outcomes ahead of the 2014-15 summer wet season, without putting future water supplies at risk.
Under the adopted operational strategy, more flood water will be released earlier from Wivenhoe Dam to increase water storage space in case a large flood eventuates. While this may result in some crossings, like Colleges Crossing in Ipswich, being closed more regularly, it will mean that fewer buildings (around 500 to 1500) may be affected in Brisbane and Ipswich if a flood of a similar magnitude to 2011 was to occur.