BRISBANE'S FLOODSMART FUTURE UPDATE 2021 - CATCHMENT FLOODPLAIN MANAGEMENT PLANNING - Brisbane City ...
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BRISBANE’S FLOODSMART FUTURE UPDATE 2021 CATCHMENT FLOODPLAIN MANAGEMENT PLANNING
2 | BRISBANE’S FLOODSMART FUTURE UPDATE 2021
A MESSAGE FROM THE LORD MAYOR
Brisbane is a city of resilience, strength, vision and adaptability.
January 2021 marks 10 years since Since then, further storm events Brisbane is committed to a
floodwater ravaged Brisbane and floods have occurred. Being collaborative approach to floodplain
inundating almost 30,000 homes and prepared for severe weather and management, demonstrated through
businesses. The 2011 Floods was natural disasters, such as flooding, is our ongoing contribution to the
Brisbane’s largest national disaster in no longer a once-in-a-lifetime event. Brisbane River Catchment Flood
almost 40 years and the devastation It has become part of our way of life. Studies and Resilient Rivers Program.
to many people’s homes and
Council continues to work hard to I am keen to share with you what we
businesses was heartbreaking.
make sure that Brisbane is prepared have learned since the 2011 floods.
The disaster mobilised a ‘Mud Army’ for future flood events. This FloodSmart Future Strategy
of volunteers who rolled up their update provides an overview of the
Adopting WaterSmart practices is
sleeves to get friends, family, virtual catchment floodplain management
a key priority in Brisbane. Clean,
strangers and Brisbane back on their planning we have undertaken and
Green, Sustainable 2017-2031 and
feet. Numbering around 25,000, outlines how we can continue to
we continue to show how risk-based
and making news around the world, work together to build a resilient
planning, clever construction and
these volunteers grabbed their city; a city that is safe, confident
an engaged community create a
hats, gloves, sunscreen, shovels and ready for the future.
liveable, resilient city.
and brooms to clean up our city.
Adrian Schrinner
LORD MAYOR
CATCHMENT FLOODPLAIN MANAGEMENT PLANNING | 3 CONTENTS Brisbane – A resilient city 4 Our floodplain management story 5 What have we achieved since 2011? 7 What Council is considering for the future 10 How you can be prepared 12 This document is... • A framework for planning and decision-making • A strategic guide for Council, businesses and the general public • A suite of potential projects that could be implemented in the short, medium or long term • A continuation of work undertaken under the FloodSmart Future Strategy 2012-2031 This document does… • Consider flood impacts from the Brisbane River, local creeks and waterways, overland flow and storm tide • Seek to continually improve Brisbane’s readiness for and resilience to flooding This document isn’t… • A statutory plan, detailed advice on specific locations or projects or a budget plan This document doesn’t… • Discuss specific management measures for storm tide and coastal hazards, as these will be addressed in Council’s Coastal Hazards Adaptation Strategy
4 | BRISBANE’S FLOODSMART FUTURE UPDATE 2021
BRISBANE – A RESILIENT CITY
Brisbane is a coastal, subtropical Flooding in Brisbane is multifaceted, Resilience is the ability to plan,
city defined by its river and bay. with a range of flooding types prepare, respond and return to normal
Our lifestyle and recreation revolve caused by different interactions life with minimal disruption following
around the city’s many water courses. of those elements. Brisbane has an adverse event. It means that an
We play, relax and celebrate on always lived with flooding, with informed and empowered community
the banks of the Brisbane River, impacts experienced firsthand by will have access to the information
the tributaries and creeks that our residents and businesses since they need to act on to minimise
weave through our suburbs and that time. the impact of future flooding.
along the shores of Moreton Bay.
As our climate changes we want The ability to be resilient is now
Our relationship with water is to ensure our community remains seen as one of the key attributes of
complex, but it is a key part of safe by adapting and preparing for a sustainable city – economically,
Brisbane’s much-loved identity. future flood events from all sources environmentally, socially and
including river, creek, coastal and institutionally. A resilient city balances
Flooding in Brisbane is a natural
overland flow. community, environment, built form
process, shaped by Brisbane’s climate,
and infrastructure to provide a liveable
topography and geographical
city now and for future generations.
location on a floodplain.
Our vision is for communities Our vision is for growing our city Our vision is for connected and
on floodplains that are and economy responsibly, engaged communities that are
safe confident ready
because they understand their in how we adapt to flooding. for flooding.
level of flood risk and are taking
action to manage it.
CATCHMENT FLOODPLAIN MANAGEMENT PLANNING | 5
2011 flood
OUR FLOODPLAIN MANAGEMENT STORY
A catchment is an area Flood risk management tools
of land surrounded by
natural features such as
hills, where water flows
to a common low point,
such as a creek, lake, river
or bay. A floodplain is an
area of land that is subject
to inundation by floods.
Catchment floodplain
management involves
assessing and managing
flood risks within a catchment,
or series of catchments,
to reduce the impact on The FloodSmart Future Strategy uses four tools for flood risk
management including:
people and to property.
• flood-resilient buildings and infrastructure
• flood awareness and information
The FloodSmart Future
• land use planning and development control
Strategy 2012-2031 was developed
as an overarching strategy • flood emergency management.
outlining Council’s approach Up until the 1970s, flood mitigation infrastructure (e.g. dams, levees, channel
to floodplain management. modifications) was the primary method of managing flood risks in Australia.
6 | BRISBANE’S FLOODSMART FUTURE UPDATE 2021
A series of large floods in the 1970s Over the past 10 years Council has • Council’s Citywide Creek and
resulted in a change of focus from committed to a series of studies Overland Flow Path Mapping
mitigation infrastructure to land use including the following, to provide the Study was complete in 2017 and
planning as a means of controlling most up-to-date technical information provides the latest data relating
developments on floodplains. regarding flood behaviour. to overland flow and previously
un-modelled creek flooding across
The 1990s saw a focus on flood • Council commenced its current
the whole of Brisbane’s local
emergency management and program of creek flood studies in
government area.
more recently there has been 2011 and by 2015 had completed
an emphasis on providing flood flood studies that provided the The information provided by these
awareness and information. latest creek flood data for more studies has been used to understand
than 80% of urbanised areas the consequences of flooding and
It is now recognised that best
across the city. identify floodplain management
practice floodplain management
measures, through a process
requires the coordinated application • The Brisbane River Catchment
known as catchment floodplain
of all of these management tools. Flood Studies commenced in
management planning.
Catchment floodplain management 2012 as a partnership between
planning makes use of these tools to the Queensland Government, Council’s Local Floodplain
identify a range of measures to better Seqwater and the four local Management Plan includes a
manage flood risk within a catchment. governments of Brisbane, Ipswich, comprehensive and up-to-date
Somerset and Lockyer Valley. assessment of all sources of
The process of catchment floodplain
This program of works has resulted Brisbane’s flood risk, drawing
management planning considers the
in the completion of the Brisbane on a range of existing studies,
consequences of flooding on the
River Catchment Flood Study in information and management
community, environment, businesses
2017 and the Strategic Floodplain measures for future decision-
and infrastructure. It aims to:
Management Plan in 2018. making. The Local Floodplain
• reduce the flood risk to people Management Plan sets a roadmap
• Council completed its Coastal
and property for long-term flood management
Flood Study in 2015, providing
• maintain local economic that considers the possible
a better understanding of tidal,
development and growth impacts of a changing climate.
storm surge and associated coastal
• ensure appropriate land flooding within Moreton Bay.
use planning
• protect the local environment
• minimise impacts to
infrastructure and services.
CATCHMENT FLOODPLAIN MANAGEMENT PLANNING | 7
WHAT HAVE WE ACHIEVED SINCE 2011?
Much work has been OUR FLOOD AWARENESS ACHIEVEMENTS
undertaken since the Promoting community understanding of flooding to encourage readiness.
adoption of the FloodSmart An informed and empowered community will have access to the information
they need to act, build resilience and minimise the impact of future floods.
Future Strategy, to ensure
that Brisbane is working Council has improved the ways in The Flooding in Brisbane Guides
which it makes information available are designed to help residents and
towards becoming a more to residents and businesses. A range businesses prepare for flooding and
resilient city; a city which is of awareness tools is available online outline simple things they can do to
safe, confident and ready. and updated regularly with the best be prepared.
available flood study data.
Council has embraced Council’s Open Data platform
the integrated approach First made available in 2008, the supports re-usable, accessible,
FloodWise Property Reports understandable and shareable
promoted by the strategy, continue to be updated when new Council data. Data sets are available
applying the four flood risk flood information becomes available. for creek, coastal and overland
management tools to deliver The reports include information flow flood studies, City Plan flood
to ensure future building and overlays, waterways and wetland
floodplain management development contributes to assets, and stormwater infrastructure.
projects across the city. a safe, flood-resilient city.
The Flood Hub provides an
The Flood Awareness Map interactive space for the community
launched in 2013 and provides an to learn about flood resilience, touch
indication of the likelihood of a and feel flood-resilient building
flood occurring from one or more materials and talk to flood engineers
sources: creek, river, overland flow about flood-resilient building
and storm tide. Recent updates strategies. More than 6300 people
allow users to better understand the have been engaged through the
possible impacts of overland flow, Flood Hub to date.
while historical mapping provides
the history of river floods in Brisbane.
8 | BRISBANE’S FLOODSMART FUTURE UPDATE 2021
OUR FLOOD RESILIENT INFRASTRUCTURE AND BUILDING ACHIEVEMENTS
Maintaining and investing in flood mitigation assets to support the city’s economic growth. Designing with water
in mind, a key priority in Brisbane. Clean, Green, Sustainable 2017-2031 is helping Brisbane become an even more
attractive, liveable and resilient city.
Council has an ongoing program Following on from technical Council has an ongoing CCTV
of both structural and non- investigations, a series of backflow inspection program of its drainage
structural flood mitigation devices have been installed to network to proactively identify
activities across Brisbane. help minimise water flowing back siltation and potential failure.
Council’s Flood Resilient Homes up stormwater pipes. Following the 2011 floods, almost
Program offers homeowners at risk 500 km of the stormwater network
Council has invested more than
of frequent flooding from overland was inspected and cleaned to remove
$87 million since 2011 with the aim
flow a free in-home service, a tailored 22 million litres of sludge that had the
of minimising flooding impacts in
property report and an incentive potential to compromise the capacity
local catchments by constructing
scheme for eligible properties. of the network.
major and local drainage
The program seeks to help residents infrastructure, obtaining drainage Following a global competition,
prepare for, live through and then easements and acquiring land. Council commissioned designs
return to normal household routines for flood-resilient ferry terminals
following a flood, with the least Council manages more than
and new terminals featuring the
amount of disruption. More than 800 km of urbanised open waterways
innovative design are now in action.
225 free in-home services have been and approximately 4000 km of
Each terminal has a boat-hull-shaped
undertaken to date, with 71 homes waterways in total. Desilting and
pontoon to reduce drag and a
retrofitted to improve flood resilience. vegetation management activities
gangway that automatically detaches
are undertaken on 40 km of creek to
During the January 2011 flood, some from the shore during floods,
ensure optimum flood conveyance.
parts of Brisbane were affected by swinging behind the pontoon
water that came up from the river and out of the path of debris.
through the drainage networks
and into our streets.
Flood Hub Construction of stormwater infrastructure
CATCHMENT FLOODPLAIN MANAGEMENT PLANNING | 9
OUR FLOOD EMERGENCY MANAGEMENT OUR LAND USE
ACHIEVEMENTS PLANNING ACHIEVEMENTS
We have further developed our capacity to respond to and recover from Shaping the city’s built form to
flood events. Disasters can strike with little or no warning and it’s important increase our resilience to flooding.
for Brisbane communities to be prepared, especially in areas that are likely
Brisbane City Plan 2014 is Council’s plan
to be isolated by flooding, or where there are vulnerable groups within
for the future development of Brisbane.
the community.
It guides how land in Brisbane can be
Since the 2011 Brisbane floods, state-of-the-art FloodWise used and developed. It also helps plan
Council has gained valuable Information system. Council’s Creek for infrastructure to support growth and
knowledge about disaster Flooding Alert Service makes use of create a more diversified economy while
prevention, preparation, response this information to issue alerts when continuing to protect our city’s enviable
and recovery. Council has created rain or flow levels in nearby creeks way of life.
disaster management plans, indicate that properties may be at As part of City Plan, a new hazard-based
guidelines and arrangements risk of flooding. Flood Overlay Code was introduced,
to help residents and businesses to ensure that development adequately
Council’s Be Prepared
prepare, respond and recover considers flooding. Flood Planning
communication campaign informs
from various hazards, weather Areas were defined for the Brisbane
the community on how to prepare
events and emergencies. River, creek flooding and overland
for severe weather including
Council provides Brisbane residents bushfires, severe storms, flooding flow to guide future development
and visitors with a free Early and heatwaves. It promotes the in flood-prone areas.
Warning Alert Service to notify awareness of Council’s online tools Since the adoption of the Flood Overlay
them of severe thunderstorms, including the severe weather Early Code many practical outcomes have
destructive winds and potential Warning Alert Service and Flood been realised including:
flooding. The alerts are location Awareness Maps.
• properties raised to achieve
based, so residents only receive
Council provides pre-filled acceptable flood immunity
warnings if their registered
sandbags to residents and • developments designed in a way
residential address may be impacted.
businesses in Brisbane City to help that maintain the conveyance of
Rainfall and stream height reduce the impact of flooding on flood waters through a site
information is gathered from more home or business. While sandbags
• essential electrical services suitably
than 80 hydrometric telemetry will not stop the water entirely they
located to ensure public safety and
gauges located near creeks across can reduce the amount of water
minimise flood recovery following
the city, which feed into Council’s entering your premises.
a flood.
Since 2006 Council has purchased
112 residential properties at risk of
flooding with an approximate spend
of $58 million. Properties purchased
under the Voluntary Home Purchase
Scheme are used by Council for
conservation, drainage easements
and parklands, and it is Council’s
policy not to redevelop these flood-
prone areas for future residential use.
Early warning alert service Emergency management
10 | BRISBANE’S FLOODSMART FUTURE UPDATE 2021
WHAT COUNCIL IS CONSIDERING
FOR THE FUTURE
Catchment floodplain OUR FLOOD AWARENESS OPPORTUNITIES
management planning allows • Maintain and update a detailed
us to better understand the flood risk database to support future
floodplain management planning.
consequences of flooding
and identifies potential • Update the Flood Awareness Map
and FloodWise Property Reports to
floodplain management reflect regional recommendations
opportunities that could for flood awareness mapping
be implemented in the and communication.
short, medium or long term • Targeted community engagement
with residents and businesses
by Council, businesses and located within flood areas to help
the public. improve the safety and resilience
of those most at risk of flooding.
The opportunities that have been
identified include an integrated • Place-based education installations
mixture of land use planning, flood and events to gather information
emergency management, flood about flooding experiences
information and awareness, and flood- as part of consultation with
resilient infrastructure and buildings. community groups. Flood awareness map
Some of the opportunities that • Promote continued awareness
have been identified are likely to of the future local impacts of
be applicable on a city-wide scale, climate change across the city,
while others target specific areas incorporating new information
of interest. Examples of potential as it becomes available.
opportunities that Council may
consider are presented adjacent.CATCHMENT FLOODPLAIN MANAGEMENT PLANNING | 11
OUR FLOOD RESILIENT • Developing a local flood warning • Flood planning scheme policy to
INFRASTRUCTURE system for Brisbane that would require consideration of data from
AND BUILDINGS provide enhanced warning of relevant studies (Brisbane River
Catchment Flood Studies and
OPPORTUNITIES
severe weather and flash flooding.
Local Floodplain Management
• Continue to use new information
• Continue to use new information Plan) during development
from the Brisbane River
from Council’s ongoing program assessment, through flood risk
Catchment Flood Studies
of works and from the Brisbane assessment and flood emergency
program to undertake local
River Catchment Flood Studies management plans.
evacuation planning and
program, to inform the design • Transition from a single flood
capability assessment.
of new resilient buildings planning area to multiple risk-
and infrastructure.
OUR LAND USE based planning areas for overland
• Planned road upgrade projects PLANNING flow, similar to the River and Creek
flood planning areas.
near creek crossings and
OPPORTUNITIES
waterway rehabilitation projects
to be investigated and cross- • Continue to use the best available WHAT DOES
referenced against known flood information to inform and improve COUNCIL DO WITH
mitigation opportunities and Council’s planning scheme,
THE FLOODPLAIN
MANAGEMENT
consider possible avenues including new information as it
becomes available from Council’s
for implementation.
ongoing program of works and
OPPORTUNITIES
• Consider purchasing flood- from the Brisbane River Catchment ONCE THEY HAVE
affected homes where there is Flood Studies program, including BEEN IDENTIFIED?
no viable flood-resilient measures or information relating to: Council is the largest local
alternatives exist. Consider potential – evacuation capability government in Australia, delivering
property purchase opportunities as
– available warning time a broad program of works
part of an extension to the Flood throughout our city. The process of
– flood islands cut off or
Resilient Homes Program. catchment floodplain management
isolated by floodwaters
– cumulative impacts of filling planning is just one part of the
OUR FLOOD within the floodplain. work Council undertakes.
EMERGENCY The floodplain management
MANAGEMENT • Incorporate Queensland
opportunities have been identified
OPPORTUNITIES
Government’s State Planning
initially in isolation from Council’s
Policy requirements to consider the
• Expanding Council’s creek flood broad program of works. The next
full range of flood risk and climate
step is to consider these opportunities
alert program and coverage change scenarios as part of future
alongside all of Council’s other
to allow additional residents plan-making exercises.
competing priorities. This will be
and businesses to register and
undertaken through Council’s annual
receive alerts when rain or flow
budget process, which considers and
levels in nearby creeks indicate
prioritises all of Council’s work in order
that properties may be at risk
to maximise value for the community.
of flooding.
Together with our partners, the
• Future expansions to Council’s floodplain management opportunities
existing flooded road warning will be implemented through a range
signage program to assist in of delivery plans, projects and actions
deterring traffic from entering including when scheduling new flood-
flood waters at additional locations. resilient infrastructure and buildings
During storm season message during updates to planning schemes
boards could also be used to (including during neighbourhood
display flood safety messaging. planning processes), planning new
emergency response measures
and when developing new flood
Land use planning information and awareness tools.HOW YOU CAN BE PREPARED
We all have a role to play in • FloodWise Property Report. • Flooding in Brisbane guides for
managing flood risk in our local area. Download a FloodWise Property both residents and businesses
Council has the following range Report for flood information help you prepare for flooding and
of free tools and information to relating to purchasing, building or help minimise the impact to your
help residents understand their renovating your home. home, family, property or business
property’s potential flood risk if flooding does occur.
• Early Warning Alert Service. Sign
and how to be prepared.
up to receive free alert messages For more information on being
• Interactive Flood Awareness Map. for severe weather. prepared for flooding visit
Identify the flood risk for your brisbane.qld.gov.au/beprepared,
• Responding to a flood threat web
local area, including: your nearest Council regional
page. Understand how to respond
business centre or call Council
– Flood Awareness Map to a flood, including the locations
on 3403 8888.
– download a printable of Council depots where sandbags
Flood Awareness Map are provided for collection.
for your locality
– Interactive Flood Source Map
– Identify the type or sources
of flooding that may affect
your locality
– Interactive Historical
Flood Map – learn about the
history of Brisbane’s major
river floods.
Brisbane City Council brisbane.qld.gov.au
GPO Box 1434 3403 8888
Brisbane Qld 4001
/BrisbaneCityCouncil
Every effort is made to ensure that CA20-1160949-03-5228 @brisbanecityqld
information is correct at time of publication © 2020 Brisbane City Council @brisbanecitycouncilYou can also read
