Coastal erosion risks

The Peron Naturaliste region (the area from the Shire Rockingham to City of Busselton) has been identified as vulnerable to the impacts of coastal climate change. From now to 2100, approximately 200 metres wide strip is at risk from erosion along the whole extent of the coastline.

Risks between now and 2100:

  • Erosion is a far more pervasive issue than flooding.
  • 800 hectares of residential land (which equates to around 320 MCG) would be subject to an increase in flooding risk.
  • Approximately 200 metres wide strip is at risk from erosion along the whole extent of the coastline.
  • The value at risk of the affected assets along this section of coastline is approximately $1.2 billion.
  • Approximately $1.1 billion of assets can be saved, at a cost of around $120 million.

Disclaimers

  • There is some uncertainty in projection (between 150-300metres) by 2110 on a scenario of 1 metre of SLR.
  • the model assumes the coast is all sand. Hence the erosion rates are ignoring rock (i.e. rocky areas and existing sea wall structures will not erode as fast and are not an indicator).
  • Areas that are not built up will become the indicator areas of erosion rates. 

Case Studies

Data Source:

  • Peron Naturaliste Partnership. 2016. Developing Flexible Adaptation Options for the Peron Naturaliste Coastal Region of Western Australia. [online] [Accessed 15 Feb. 2018]