Rockingham 20° 15 °

Coastal Vulnerability

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Coastal Hazard Risk Management and Adaptation Planning

The City is currently in the process of preparing a Coastal Hazard Risk Management and Adaption Plan (CHRMAP), in accordance with State Planning Policy 2.6: State Coastal Planning (SPP 2.6).

​The CHRMAP is a strategic planning document that informs community and decision makers about potential coastal hazards (such as erosion and inundation), the risks and necessary actions. The CHRMAP will outline key directions for coastal adaption over a 100 year planning timeframe, while also prioritising management responses over the next 10 years. 

What is the process

There are four key parts to the development of a CHRMAP, as shown below:

CHRMAP process flowchart

 

 


CHRMAP Part 1

  1. Hazard assessment
  2. Community Coastal Values Survey

CHRMAP Part 2

  1. Risk assessment and potential adaptation options
  2. Public Information Sessions and Adaptation Workshops

CHRMAP Part 3

  1. Draft Adaptation Plan
  2. Draft Adaptation Plan released for public comment

CHRMAP Part 4

Final Adaptation Plan

What coastal hazards have been identified?

​The City engaged coastal engineers to assist with Parts 1 and 2 of the project. This included modelling coastal erosion and inundation hazards over different planning timeframes (2017, 2030, 2070 and 2110) relative to projected sea level rise (0.9m by 2110) and storm event scenarios.

​The modelling identified that much of the City's coastline is potentially vulnerable to coastal hazards, particularly in the areas from Port Kennedy northward to Rockingham. The modelling methods and results are detailed in a Coastal Hazard Risk Modelling Report, which can be viewed below.

​This technical report will now inform preparation of the City's draft CHRMAP. The CHRMAP will consider these potential hazards, together with feedback received through community consultation, to recommend appropriate management responses for the future.

Please note that the erosion and inundation hazard extents shown are based on a suite of assumptions and have varying degrees of uncertainty, which may influence the likelihood of the predicted level of erosion or inundation occurring at each planning timeframe.

​The hazards mapped have potential to occur, but that's not to say they will. The purpose of the CHRMAP is to ensure the City has a plan in place should these potential hazards become a reality in the future.

Further, SPP 2.6 requires revision of the CHRMAP every 10 years, which would include an update of hazard estimates using the most up-to-date information available at that time, the findings of any specialist investigations undertaken, changes to projected sea level rise and any changes to the use of the foreshore.

When can I be involved?

Opportunity Timing Status
Community Coastal Values Survey made available online September 2017 Completed
Information sessions and adaptation workshops August 2018 Completed
Draft CHRMAP made available for public comment December 2018  


If you would like to receive CHRMAP project updates please subscribe through Rock Port, the City’s online portal which can be accessed using any PC, tablet or mobile device.

Alternatively, you can email the City’s Coordinator Sustainability and Environment, Natalie Elliott, via customer@rockingham.wa.gov.au or 9528 0333 should you have any queries or wish to be placed on the CHRMAP project stakeholder register.

Frequently asked questions and more information

Title Type Size and format
Frequently Asked Questions Document PDF 357 kb
Coastal Hazard Risk Management and Adaption Plan Brochure Document PDF 989 kb
Coastal Hazard Risk Modelling Report Document PDF 2.8 MB
Coastal Hazard Mapping - Erosion Document PDF 4.9 MB
Coastal Hazard Mapping - Inundation Document PDF 13.2 MB