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2011 Floods

Submitted by Andrew Spalding on Tue, 19/04/2011 - 7:43am

The recent severe flooding in parts of our neighbourhood covered by the Sherwood Neighbourhood Plan has caused us to reflect on what changes, if any, should be made to the plan.

Our hearts go out to residents, property owners and business that have been affected by the flood.

The Queensland Government Commission of Enquiry will provide a significant amount of resources to analysing why the flood occurred and what should be done in the future to reduce flooding and mitigate its effects.

The Brisbane City Council has approved a new planning instrument allowing Brisbane flood victims to raise their homes one metre higher than the 8.5 metre flood limit without applying for special approval. Developers will have to ensure essential services are flood proof or built above flood levels. The existing maximum height of 8.5 metres for the home’s highest point will remain for houses not affected by flood.

The changes will apply for 12 month’s and will require approval by the State Government.

Cr Cooper said that the new standards would only apply to residents building new homes, units and townhouses. The temporary planning instrument will also include council’s interim flood level requiring new homes in flood areas to use the January 2011 flood level as a guide.

Council Planning Chair Councillor Amanda Cooper said: “The safety and protection of residents during and after flooding remains the council’s highest priority.”

We heartily concur.

If you have additional issues about flood planning you would like to raise please post your comments…or contact us on our website



A useful resource in examing the extent of the floods can be found at

If you are interested in other flood views (even across Australia) you can go to the near map website and choose the town, date etc for the information.

A number of resident groups along Oxley Creek have been investigating the flood mapping undertaken by BCC and in consultation with a professional hydrologist have found some cause for concern with different methods being used in Oxley Creek flood plain modelling.
Should we be working with these other groups to collect information and engage our own formal study of flood modelling?  This may be important given the draft proposals for levees surrounding the Brisbane Markets and the impacts this might have both within and upstream our suburbs.
How do local residents feel about this sort of study and would we have your financial support for gathering of raw data from the Department of Environment and Resource Management (DERM) to undertake the study?

The cost for the basic Q100 flood model is $26,600, $6,600 deposit and it would take 6-9 months,  this is using the newly developed ANUGA modelling program. Aust National Uni and Geo Science Aust developed this program about 7years ago to plot tsnamis, it has since proven to be as good for waterways as the more commonly used and more expensive modelling programs.
It is also free and freely available on the web, ANU and Geo sceince Australia developed this with the Australian gov and as such are not looking to make money from it, like CSIRO used to be like.
The hydrologists cost is relatively low cost because the groups would need to do the hard work of collecting the info to pass on the hydrologists.
Tiles to cover the area of interest, which is actually bigger than the catchment is $3 a tile at 30km by 40km thus $3,600 if I am correct.
The terrain data from DERM is not the only data needed info on bridges, roads, rainfall, arial photos etc all contribute to the accuracy.  Also have not looked into discount but our MP also approached DERM on our behalf and came back with a similar figure.
All in all it is a time comsuming project, cost considering the outcomes is very reasonable (other programs cost hundreds of thousands and take just as long, it is a time consuming process).
The result would be the only 2D hoilistic flood model of Oxley Creek (that we are aware of) which would also be a saleable product.
If we decided to go ahead the hydrologist could start straight away.

Does anyone else find it strange that a community organisation feels the need to finance something that should be provided by the Authority responsible for drainage of stormwater, i.e. the Council?  Is the lack of information because it will demonstrate the additional earth dumped near Sherwood Road for the Bus Depot will actually increase flood risk for this community?
Just remember the person responsible for this fiasco now wants you to vote him in as Premier so he can foul up the state like he has fouled up this area.