Hello everyone and welcome to 2016! We hope you
had a well-deserved break over the Christmas period and are fresh
and ready for the new year!
This is the January edition of ďKeep Things
FlowingĒ, the monthly newsletter presented by Storm Water
Coming up in this monthís newsletter, we look at
the recent flood modelling updates released by Brisbane City
Council and we answer another frequently asked question. †
BCC Flood Modelling Updates
Earlier this month the media ran several news
stories about Brisbane City Councilís recent flood mapping updates.
The news stories focused on residents whose properties were previously
not included in Brisbane City Councilís Flood Planning Areas and
since the updates, are now located in the Flood Planning Areas. Residents
were concerned about the devaluation of their properties due to now
being located in Flood Planning Areas. Many residents were quoted
as saying there had never been a flood on their property in all the
time they lived there and that the modelling was unwarranted.
Brisbane City Council have updated their Flood
Mapping System with results from their latest flood modelling which
was undertaken in the following areas:
Station Gully Creek
Updates were made to the Creek/Waterway Flood
Planning Areas. The Creek/Waterway Flood Planning Areas are areas
subject to inundation from a Creek or Waterway. Depending on the
characteristics of the flood water, a sub-rating is defined from 1
(high risk) to 5 (low risk). A typical Creek/Waterway Flood
Planning Area Map is shown in Figure 1 below.
1 Ė Example of BCC Creek/Waterway Flood Planning Area
Advancements in hydrologic and hydraulic
modelling technology allows Councilís to update their predicted
flood inundation areas. Just because an area has never experienced
flooding before doesnít mean it will never happen. Too often we hear
residents explain that itís never flooded on their property despite
flood modelling showing that it could happen. Itís better to know
about a potential flooding problem earlier rather than later. For
access to Councilís Flood Mapping system please visit the link
Interactive Mapping System
Design flood event Ė these are not real. Like
designing a building to resist an earthquake of a particular
magnitude. We design for it and hope that it doesnít happen.
If you are concerned about the flood risk
associated with your property please feel free to contact our
Frequently Asked Question
My property is subject to overland flow flooding
and I plan to develop. What type of fence am I allowed to construct
given there is overland flow across the block?
A fence is an unregulated structure. So
technically the Council canít prevent you from constructing any
type of fence you like. However, caution should be taken when
selecting the type of fence. If the fence were to block the
overland flow path and create an adverse impact to neighbouring
properties you could be liable for any damages caused. The Council
could make you remove the fence due to the adverse impact it
creates on neighbouring properties.
Every property has different flooding
characteristics and a decision on the type of fencing should be
undertaken during the planning stage of the project. Typically, a tubular
pool type fence is suitable to be located in areas subject to
overland flow inundation. The pool type fence allows flows to pass
through the fence with the least likelihood of debris blockages.
Note, areas subject to Creek or Waterway flooding may also be
restricted with the fence selection.
If you are concerned about the type of fencing
selected for your development please feel free to contact our
office and we would be pleased to help with an adequate fence
We hope you enjoyed this edition of Keep Things
Flowing. Feedback on articles presented is always welcomed and for
further information on any of the articles presented please donít
hesitate to contact our office.
As always, Keep Things Flowing!
The Storm Team