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The impacts of flooding can be significant, especially to buildings, infrastructure, roads and land.
If you live in an area near a river, creek or stormwater channel, you may be susceptible to flooding. Increased water runoff from surfaces such as driveways, roofs and paving also contribute to flooding in major storm events. Climate change is another factor that has increased the intensity and frequency of storms, rainfall and tidal events.
The area's at most risk of flooding in our Local Government Area are the floodplains of the Cooks and Georges Rivers.
We actively work to reduce the impact of flooding and undertake a number of flood studies.
We are members of
Floodplain Management Australia, an organisation committed to promoting appropriate development within the floodplain, and reducing the risks of flooding to life and property.
Council has a chapter in the Development Control Plan (DCP) - Part B12 - which deals specifically with Flood Risk Management in the Local Government Area. Part B12 of the DCP supports the Local Environmental Plan for Bankstown by providing additional objectives and development standards to control the development of flood prone land in the City.
Bankstown Development Control Plan (DCP) 2015
Part B12 - Flood Risk Management
Schedule 1 - Flood Compatible Materials
Schedule 2 - Land Use Categories
Schedule 3 - Georges River Floodplain
Schedule 4A - Carinya Road, Picnic Point Floodplain
Schedule 5 - Catchments affected by Stormwater Flooding
Schedule 7 - Explanatory Notes on Lodging Applications
Council is preparing flood studies for catchments affected by stormwater flooding (flash flooding). Stormwater flooding is different to riverine flooding, which is defined as rising water from a river or creek such as flooding on the Georges or Cooks Rivers. However, it is important to note that stormwater flooding can still result in major damage.
Completed studiesThe table below provides a list of completed stormwater catchment flood studies. Most studies are available in eBook format.
Stormwater Catchment Floodplain Risk Management Plans have been commissioned for three major catchments in the LGA (if information is available on this plan, the hyperlinks will be active):
Other Stormwater Catchment Floodplain Risk Management Plans will be commissioned progressively in the future.
The consequences of flooding in the Georges River are significant in Canterbury-Bankstown. This was evidenced by the floods that occurred in 1978, 1986 and 1988. The largest of these floods occurred in 1986 and was equivalent to a 1 in 20 year event.
As an important strategic initiative in managing the flood prone land along the Georges River, Council commissioned consultants to prepare the Georges River Floodplain Management Study and Plan. This study was prepared jointly for Fairfield, Liverpool and Sutherland Councils to ensure compliance with the NSW Governments Flood Prone Land Policy. Council adopted this study in late 2004.
The study mapped all areas that are at risk of flooding, including areas that are at risk in a greater than 100 year flood event. The study found that in 100 year flood around 261 residential properties containing a house and around 65 commercial and industrial properties containing a building would be inundated by flood water. Based on this mapping, the floodplain has been divided into three flood risk precincts: high, medium and low. This allows a risk-based approach for floodplain management that provides a graded approach for land use and development.
The study has also reviewed Council's existing flood mitigation infrastructure and has made recommendations for improving emergency management issues and enhancing flood awareness in the community by linking Bureau of Meteorology flood gauge heights to flood levels for specific properties.
The study can be accessed using the links below:
The Georges River Estuary is one of the most important estuaries in Sydney and is of high ecological, social and economic value. The Estuary extends from Liverpool Weir to Botany Bay.
The Georges River Estuary Management Committee was formed in July 2008. The inaugural task of the committee was to oversee the preparation of a Data Compilation and Estuary Processes Study for the Georges River. These two documents were completed in May 2010 and are available on the Georges River Combined Council's Committee (GRCCC) website.
Completion of this study allowed the progression to an Estuary Management Plan, which was the second task of the committee. In April 2011, BMT WBM was commissioned by the GRCCC to prepare the Georges River Estuary Management Plan.
In early 2011, the NSW Government released Guidelines for Preparing Coastal Zone Management Plans; these guidelines replace the previous manual for preparing an Estuary Management Plan. The Estuary Management Plan has hence been called a Coastal Zone Management Plan (CZMP) to reflect its preparation under the new guidelines. The plan was completed in Mid 2013.
The CZMP applies to all estuarine waters of the Georges River extending from Liverpool Weir to Botany Bay. This includes the river foreshores, the Botany Bay foreshore and all tidal waters that flow into the Georges River. The plan also applies to the Georges River catchment and identifies actions in the catchment that impact on the river.
The CZMP sets the strategic framework for the future management, over a period of 5-10 years, of the Georges River Estuary and also includes an action plan. The plan aims to conserve and improve the existing natural environment of the estuary and improve water quality.
The CZMP lists nine broad aims and 27 management objectives for the Georges River Estuary. The aims and objectives relate to issues such as water quality, aquatic and foreshore vegetation, public access, bank erosion, foreshore assets, heritage, climate change, and monitoring and reporting. An action plan containing a set of 25 best management options have been developed to meet the broad aims and management objectives.
The CZMP was adopted by our Council and other participating member Councils of the GRCCC (Rockdale, Kogarah, Hurstville, Sutherland, Liverpool and Fairfield City Councils). The Minister for the Environment Certified the CZMP in March 2015 and the plan became effective from the date it was published in the NSW Government Gazette (10 July 2015).
Under the Environmental Planning and Assessment Act, 1979, CZMPs are to be taken into consideration in determining relevant development proposals under Section 79C. This has implications for development assessment decisions as the plan is relevant to proposals that may have an impact on the Georges River.
Executive Summary of the full CZMP Full Report has been prepared which provides details of the broad aims, management objectives and best management actions.
For more information, contact our Customer Service Centre on 9707 9000.