Skip to main content
SES - NSW State Emergency Service NSW Government - Office of Environment and Heritage

NSW Flood Data Portal

Floodplain Risk Management Study

Lake Illawarra Floodplain Risk Management Study


Background and Study Development

The Lake Illawarra Flood Study was completed in 1999 by Lawson and Treloar and
published in 2001. This study identified flood levels for the Lake Illawarra Floodplain based on the Lake conditions in 1997. This Floodplain Risk Management Study (FRMS) was commenced as the next stage of the floodplain management process in 2000. Following the commencement of the FRMS large-scale entrance works were
completed in 2001 and 2007, resulting in different conditions to those assessed under the flood study. However, the pre-2001 conditions have been adopted as the base case conditions for the purposes of this FRMS. Since the commencement of this study, several additional aspects of floodplain management have been identified and incorporated into the study. These include:

  • The assessment of True Hazard to more accurately identify flood risk categories (which are in part based on 100 Year ARI low and high hazard); and
  • The assessment of the impact of climate change on flood levels around the Lake
    foreshore and the implications for floodplain management.
    As a result, the development of this FRMS has been a more detailed approach than
    originally envisaged, as such this document represents the incorporation of progress in floodplain management over the last 10 years.

Additional Information

Field Value
Title Lake Illawarra Floodplain Risk Management Study
River Basin 214 - Wollongong
Publication Date 1 January 2012
Themes Land and Resource Management
Spatial Extent
© OpenStreetMap contributors
Council/LGA Wollongong City Council
Additional LGA's covered within study
  • Shellharbour City Council
Author/ Prepared by Cardno Pty Ltd
Publish date 15 September 2017
Update date 20 September 2017
Place Name Windang, Oak Flats, Albion Park Rail, Yallah, Koonawarra, Kanahooka, Berkeley, Lake Heights, Kemblawarra and Primbee.
Approval State Approved
Submitted for approval 20 September 2017
Submitted by Don Stazic
Approved 10 November 2017
Approved by ses-sysadmin
Data Comment

Report only.

Identifier b2d6a646-a02c-409e-81e7-b66fe991b270