IE10 and below are not supported.

Contact us for any help on browser support

Waverley LGA Flood Study

About the Study

Waverley Council is carrying out a detailed flood study of the Local Government Area (LGA) catchments to define the existing flood behaviour and better understand the flood risks within the LGA. This study will establish the basis for subsequent floodplain management activities and is being prepared to meet the objectives of the NSW State Government's Flood Policy.

Waverley Council will administer the project. BMT WBM, an independent company specialising in flooding and floodplain risk management, will undertake the study and the NSW Office of Environment and Heritage is providing financial and technical assistance.

This website has further information on the Waverley LGA Flood Study and will be updated throughout the study as new information becomes available.

Have Your Say

Help us improve flood management by completing the survey below, regarding your previous flood experiences in the study area. This information is strictly confidential.

The Study Area

This study is to encompass the entirety of the Waverley Local Government Area (LGA). The study area is located east of the Sydney CBD, between Randwick and Woollahra LGAs. The study area consists of fourteen catchments which drain to Sydney Harbour and the South Tasman Sea. The study area is highly urbanised with significant residential development.

Flooding within the Waverley LGA is caused primarily by significant catchment rainfall. Consideration is also given to oceanic inundation (tide and storm surge).

Council have identified a number of flood-prone areas within the catchment which generally are located at localised low-points or may be susceptible to flooding due to overland flow. These locations are shown below.

The Flood Study

BMT WBM on behalf of Waverley Council is carrying out a detailed flood study of the Waverley LGA catchment.

The aim of the flood study is to:

  • define the existing flood behaviour from local catchment flooding and tidal inundation in the defined study area;
  • provide a basis for flood risk related development control; and
  • develop a tool for assessing floodplain management options in subsequent floodplain management and planning studies.

The Flood Study will investigate flooding in the catchments to identify the critical or worst case flood conditions for a range of flood events for both catchment and ocean derived flooding, including overland flooding. Overland flows are typical in urban environments where it is not feasible to design stormwater drainage to capture very large and infrequent flood events.

For different locations within the catchment, and for different size flooding events, the dominant flooding mechanism can vary, being either catchment rainfall or ocean flooding.

The study will also consider the potential flooding impacts of climate change, from both sea level rise and increased rainfall intensity, in line with current state policy and best practice.

At the core of the study will be the development, calibration and verification of detailed computer models of the catchment to simulate flood behaviour. Historical flood information such as rainfall depths, peak water levels, flooded property details etc, are used to ensure the computer models are representative of the real catchment behaviour.

Through our role as principal model developer of the TUFLOW 2D hydrodynamic modelling software, and decades of flood modelling expertise, BMT WBM is at the leading edge of flood model development and application.

The Floodplain Management Process

The prime responsibility for planning and management of flood prone land in New South Wales rests with local government. A Flood Prone Land Policy and the Floodplain Development Manual (NSW Government, 2005) forms the basis of floodplain management in New South Wales.

The implementation of the Flood Prone Land Policy generally culminates in the preparation and implementation of a Floodplain Management Plan in accordance with the principles contained in the Floodplain Development Manual. The Waverley LGA Flood Study is one of the first steps in preparing the Plan, and involves an assessment of existing flood conditions throughout the catchment. The steps in the floodplain management process are summarised below.

Community Input

Community consultation is an important component of the flood study. The aim of community consultation is to inform the community about the development of the flood study and its outcomes. Community consultation also provides an opportunity for the community to provide details of their flood experience, their concerns regarding flooding issues and to provide feedback and ideas on potential floodplain management activities.

There are a number of ways you can be involved in the study:

  • A community questionnaire will be distributed throughout the community asking local residents to provide as much information as possible in regard to historical flood events within the Waverley LGA catchments. Please take a minute or two to read through these questions when you receive them and provide responses wherever you can. You can also complete the questionnaire online via the link below. This information is strictly confidential and only used for the study. Feedback will be accepted until 22 December 2017.
  • A series of community information sessions will be held in March 2018 (further information will be provided closer to the date). Please come along to hear about the existing and future flood risk posed to the community, and to give your ideas and concerns in regard to ongoing management of flooding in the Waverley Council LGA. If you would like to be informed via email when the community information session will be held and further updates of the study please sign up for updates via the link to your right.
  • This page has been established to keep the community informed on the study progress. The website has further information on flooding in the Waverley LGA catchment and will be updated throughout the study as new information becomes available.

Contact Us

For more information on this project, please contact:

About the Study

Waverley Council is carrying out a detailed flood study of the Local Government Area (LGA) catchments to define the existing flood behaviour and better understand the flood risks within the LGA. This study will establish the basis for subsequent floodplain management activities and is being prepared to meet the objectives of the NSW State Government's Flood Policy.

Waverley Council will administer the project. BMT WBM, an independent company specialising in flooding and floodplain risk management, will undertake the study and the NSW Office of Environment and Heritage is providing financial and technical assistance.

This website has further information on the Waverley LGA Flood Study and will be updated throughout the study as new information becomes available.

Have Your Say

Help us improve flood management by completing the survey below, regarding your previous flood experiences in the study area. This information is strictly confidential.

The Study Area

This study is to encompass the entirety of the Waverley Local Government Area (LGA). The study area is located east of the Sydney CBD, between Randwick and Woollahra LGAs. The study area consists of fourteen catchments which drain to Sydney Harbour and the South Tasman Sea. The study area is highly urbanised with significant residential development.

Flooding within the Waverley LGA is caused primarily by significant catchment rainfall. Consideration is also given to oceanic inundation (tide and storm surge).

Council have identified a number of flood-prone areas within the catchment which generally are located at localised low-points or may be susceptible to flooding due to overland flow. These locations are shown below.

The Flood Study

BMT WBM on behalf of Waverley Council is carrying out a detailed flood study of the Waverley LGA catchment.

The aim of the flood study is to:

  • define the existing flood behaviour from local catchment flooding and tidal inundation in the defined study area;
  • provide a basis for flood risk related development control; and
  • develop a tool for assessing floodplain management options in subsequent floodplain management and planning studies.

The Flood Study will investigate flooding in the catchments to identify the critical or worst case flood conditions for a range of flood events for both catchment and ocean derived flooding, including overland flooding. Overland flows are typical in urban environments where it is not feasible to design stormwater drainage to capture very large and infrequent flood events.

For different locations within the catchment, and for different size flooding events, the dominant flooding mechanism can vary, being either catchment rainfall or ocean flooding.

The study will also consider the potential flooding impacts of climate change, from both sea level rise and increased rainfall intensity, in line with current state policy and best practice.

At the core of the study will be the development, calibration and verification of detailed computer models of the catchment to simulate flood behaviour. Historical flood information such as rainfall depths, peak water levels, flooded property details etc, are used to ensure the computer models are representative of the real catchment behaviour.

Through our role as principal model developer of the TUFLOW 2D hydrodynamic modelling software, and decades of flood modelling expertise, BMT WBM is at the leading edge of flood model development and application.

The Floodplain Management Process

The prime responsibility for planning and management of flood prone land in New South Wales rests with local government. A Flood Prone Land Policy and the Floodplain Development Manual (NSW Government, 2005) forms the basis of floodplain management in New South Wales.

The implementation of the Flood Prone Land Policy generally culminates in the preparation and implementation of a Floodplain Management Plan in accordance with the principles contained in the Floodplain Development Manual. The Waverley LGA Flood Study is one of the first steps in preparing the Plan, and involves an assessment of existing flood conditions throughout the catchment. The steps in the floodplain management process are summarised below.

Community Input

Community consultation is an important component of the flood study. The aim of community consultation is to inform the community about the development of the flood study and its outcomes. Community consultation also provides an opportunity for the community to provide details of their flood experience, their concerns regarding flooding issues and to provide feedback and ideas on potential floodplain management activities.

There are a number of ways you can be involved in the study:

  • A community questionnaire will be distributed throughout the community asking local residents to provide as much information as possible in regard to historical flood events within the Waverley LGA catchments. Please take a minute or two to read through these questions when you receive them and provide responses wherever you can. You can also complete the questionnaire online via the link below. This information is strictly confidential and only used for the study. Feedback will be accepted until 22 December 2017.
  • A series of community information sessions will be held in March 2018 (further information will be provided closer to the date). Please come along to hear about the existing and future flood risk posed to the community, and to give your ideas and concerns in regard to ongoing management of flooding in the Waverley Council LGA. If you would like to be informed via email when the community information session will be held and further updates of the study please sign up for updates via the link to your right.
  • This page has been established to keep the community informed on the study progress. The website has further information on flooding in the Waverley LGA catchment and will be updated throughout the study as new information becomes available.

Contact Us

For more information on this project, please contact:

  • Waverley LGA Flood Study Community Questionnaire

    Waverley Council is undertaking a detailed flood study to understand the risks within the Local Government Area (LGA). 

    We are seeking the community’s help by collecting information on any flooding or drainage problems that you may have experienced in the past.

    Please take a minute or two to read through these questions and provide responses wherever you can. 

    Feedback will be accepted until 22 December 2017. 

    All information provided is confidential and used only for the purposes of the study.

    Waverley Council is undertaking a detailed flood study to understand the risks within the Local Government Area (LGA). 

    We are seeking the community’s help by collecting information on any flooding or drainage problems that you may have experienced in the past.

    Please take a minute or two to read through these questions and provide responses wherever you can. 

    Feedback will be accepted until 22 December 2017. 

    All information provided is confidential and used only for the purposes of the study.

    Complete Form