Queensland Floods Commission of Inquiry
The Queensland Floods Commission of Inquiry (Commission) was established by the Queensland Government to investigate the state's 2010–11 flood events.
The commission released its final report of 177 recommendations on 16 March 2012. Recommendations cover a broad range of issues including floodplain management, land use planning, building regulations, the performance of private insurers, operational and abandoned mines, emergency management and dam management.
On 7 June 2012, the Premier tabled the Queensland Government response (PDF) to the final report.
The response supports all of the final report's recommendations, and outlines the government's framework for ongoing implementation of the commission's recommendations.
The Department of State Development, Infrastructure and Planning has responsibility for implementing recommendations in chapters 2 to 8 of the final report dealing with floodplain management and the planning framework.
Brisbane River catchment studies
To achieve recommendation 2.2 of the Commission, the department is collaborating with state agencies (Department of Energy and Water Supply, Department of Natural Resources and Mines, Seqwater), local governments (Brisbane City Council, Ipswich City Council, Lockyer Valley Regional Council and Somerset Regional Council) and other stakeholders to undertake the Brisbane River catchment flood study. It is anticipated that this will then inform the floodplain management study and floodplain management plan.
National flood risk advisory group
The department is the Queensland Government's coordinating agency on the National Flood Risk Advisory Group (NFRAG).
Recommendations 2.20 and 2.21 of the Commission are being achieved by the department's participation in the preparation of a new national floodplain manual, Managing the floodplain: a guide to best practice in flood risk management in Australia. This manual will replace the Floodplain management in Australia: best practice principles and guidelines (SCARM report No 73 of 2000).
Flood risk management
Effective flood risk management should take into account that risk does not remain constant. The likelihood and consequences of risk can change significantly with increases in catchment and floodplain development and due to changes to infrastructure in the floodplain, if these changes are not effectively managed.
It can also alter with changes in climate, which may affect sea levels, exacerbate flood producing rainfall events and alter antecedent catchment conditions. Flood risk management has been shown to have great benefit in limiting flood risk through:
- improvements in strategic land use planning and building controls
- implementation of structural works to reduce flood impacts
- development of flood warning systems
- emergency management planning
- public education programs.
The Queensland Government is supporting a new way of thinking about flood events and a more informed approach to flood probabilities is being introduced.
The traditional Q100 terminology is no longer being used as there is a high probability that various types of floods will be experienced at least once or twice in an 80-year lifetime:
|Annual Exceedance Probability||Average recurrence interval||Probability of Experiencing in an 80 year period|
|at least once||at least twice|
|20%||1 in 5 years||100%||100%|
|10%||1 in 10 years||99.9%||99.8%|
|5%||1 in 20 years||98.4%||91.4%|
|2%||1 in 50 years||80.1%||47.7%|
|1%||1 in 100 years||55.3%||19.08%|
|0.5%||1 in 200 years||33.0%||6.11%|
|0.2%||1 in 500 years||14.8%||1.14%|
|0.1%||1 in 1,000 years||7.69%||0.30%|
|0.01%||1 in 10,000 years||0.80%||0.003%|
Natural hazards management guides
On 21 February 2011, the Queensland Reconstruction Authority was formed under the Queensland Reconstruction Authority Act 2011.
A land use planning team was established and the following planning documents were created:
- Planning for stronger, more resilient electrical infrastructure ( 2.2 MB)
- Planning for a stronger, more resilient North Queensland (Part 1) ( 1.4 MB)
- Planning for a stronger, more resilient North Queensland (Part 2) ( 2.4 MB)
- Rebuilding Grantham together - Development Scheme ( 7.4 MB)
- Planning for stronger, more resilient floodplains (Part 1): Interim measures ( 3.5 MB)
- Planning for stronger, more resilient floodplains (Part 2): Measures to support floodplain management ( 8.9 MB)
The authority's land use planning functions ceased on 21 February 2013. These documents will not be updated and may not reflect current departmental or state government policy or process.
For enquiries about these documents please contact the department.