What is a floodplain risk management plan?

A floodplain risk management plans analyses flood behaviour and identifies and prioritises options to help protect people and property through better planning, emergency management and infrastructure works. 

Will Council prepare floodplain risk management plans for areas outside the Dobroyd Canal?

Yes, Council is progressively completing flood management plans across the local government area. The progress of the flood planning process for the catchment areas is outlined below:

What is a flood model?

Expert consultants create a computer-generated model of the area. The model shows the impact of storm events ranging from heavy rainfall to the most extreme flood. 

This includes:

  • where the water will run
  • how the existing drainage system will cope
  • whether property damage is likely to occur

Council’s consultants, WMA Water, will use the photos, video and information provided by residents to test the model developed and verify its accuracy.

Who is WMA Water?

WMA Water is a specialist engineering consultancy with expertise in floodplain management.

What does Council already know about flooding in the Dobroyd Canal catchment?

In 2013, the former Ashfield Council studied a range of storm events in the Dobroyd Canal Flood Study, which was adopted in early 2015. The study identified a number of areas which are likely to experience flooding. These areas are concentrated around the Canal itself as well as a number of overland flow paths. 

How can I find out if my property or business is in the Dobroyd Canal catchment?

The Dobroyd Canal catchment includes parts or all of the suburbs of Ashbury, Ashfield, Croydon, Croydon Park, Haberfield and Summer Hill. The catchment drains to Iron Cove on the Parramatta River through a channel and a series of inlet pipes and pits. 

View a map of the catchment

How will the information I provide be used?

Information, photos and videos from residents will be used to test the model developed in the earlier studies and verify its accuracy.

What are the options for managing floods?

A range of options for managing floods will be investigated through the development of the plan. There are three main ways of managing flood risk:

  • controls on development

  • helping people at risk (e.g. flood warning systems)

  • changing the behaviour of the flood itself (e.g. upgrade of stormwater systems).

Each option will be evaluated by how much it:

  • reduces flood risk and losses

  • costs to implement

  • benefits or impacts society and the environment.

Council will prioritise flood management options and implement as funding allows. Implementation may need external funding, for example, through state government grants. 

When will Council implement the flood management options identified through the plan?

Options identified through the plan will be prioritised and implemented accordingly. Construction of flood management options is likely to begin from mid-2018. Depending on what the options are, they may need external funding to implement, such as through state government grants.