About the Study

Hurstville City Council is in the process of preparing an overland flood study for the Hurstville Local Government Area (LGA).  The LGA covers a total area of 22.8 km2 and is home to approximately 80,000 people. It incorporates the suburbs of Lugarno, Oatley, Peakhurst Heights, Peakhurst, Riverwood, Narwee, Mortdale, Beverly Hills, Penshurst, Hurstville, Kingsgrove and a small section of Carlton.  Land use is predominately residential, however, there are significant commercial and industrial areas also scattered throughout the LGA.

The LGA contributes runoff to two major receiving water bodies.  The southern section of the LGA (generally lying to the south of Forest Road) drains in a south-westerly direction to the Georges River / Salt Pan Creek, while the northern sections of the LGA generally drain in a north-easterly direction into Wolli Creek which, in turn, drains into the Cooks River. Prior to settlement of the region, large proportions of rainfall infiltrated into the underlying soil with the excess runoff being directed along natural drainage gullies and creeks.  However, development across the LGA has increased the amount of impervious surfaces and reduced the opportunities for rainfall to infiltrate into the underlying soils.  In addition, as urban development has progressed, many of the smaller drainage gullies and creeks have been built over and replaced by stormwater pipes / culverts.

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During most rainfall events, the stormwater system has sufficient capacity to carry stormwater runoff below ground and into the receiving creeks / rivers. However, during periods of heavy rainfall, there is potential for the capacity of the stormwater system to be exceeded, leading to overland flooding.  Overland flooding can cause significant disruption and inconvenience to residents and business owners within the LGA. During severe floods there is also potential for property damage to be incurred as well as a risk to life (refer to photographs above which show floodwaters within Stanley Street, Peakhurst industrial area during 2005 flood). As such, flooding can place a significant financial burden on the community and place lives at risk.

The preparation of a flood study will help Hurstville City Council to understand the existing flooding problem within the Hurstville LGA. It will also help Council to identify where flood damage reduction measures may be best implemented to reduce the cost of flooding to the community, assist with emergency management / evacuation processes and guide future development in a way that recognises the flood hazard.

The flood study is being completed as part of Council’s Floodplain Risk Management Program, which aims to reduce the impact of flooding on the community. It is funded by Council and the NSW Government’s Office of Environment and Heritage. It should be noted that this website does not necessarily represent the opinions of the NSW Government or the Office of Environment and Heritage.

The study is being prepared by engineering consultancies, SMEC and Catchment Simulation Solutions. Both consultancies have completed many similar flood studies across NSW.

To learn more about the study, including how you can contribute to the study, click the "Next" button below.


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Project Contributors



Council                                                            
                   Consultants:       SMEC       
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