Areas of sea level rise, inundation mapped for Kangaroo Island

BROWNLOW INUNDATION: The map show areas of Brownlow south of Kingscote that stand to be inundated by sea level rise today, 2050 and 2100.
BROWNLOW INUNDATION: The map show areas of Brownlow south of Kingscote that stand to be inundated by sea level rise today, 2050 and 2100.

Kangaroo Island Council is undertaking a study into sea level rise, coastal inundation, flooding and dune recession in our changing climate.

The Coast Protection Board for South Australia recommends that a mid-range sea level rise of 0.3 m by the year 2050 be used for most coastal planning and design. 

The Board has also adopted a 1 m rise to 2100 for coastal policy.  Although these time frames are long, many of the decisions made today – such as planning and infrastructure – have long term effects.  

An online hazard mapping tool has been developed for the eastern end of Kangaroo Island from Smith Bay in the north to Point Tinline in the south to enable informed decision making and future policy development.  

The study encompasses approximately 200km of coastline and numerous different landscape features such as bays, estuaries, sea cliffs, off shore reefs, dune systems, rock headlands and a large spit formation.  

AMERICAN RIVER: The map show areas of American River that stand to be inundated by sea level rise today, 2050 and 2100.

AMERICAN RIVER: The map show areas of American River that stand to be inundated by sea level rise today, 2050 and 2100.

The first Community Workshop that was held in August provided information about how the maps have been developed and what some of the findings are including potential sandy shore erosion, inundation from sea level rise and inundation from storm surge events. 

A second Community Workshop will discuss response options and triggers for decision making.  The response options are categorised as avoid, protect, accommodate, retreat or do nothing.  

The format for Community Workshop 2 will be as a “roadshow” over two days discussing specific areas at each location.

Thursday, September 13:

1pm to 3pm Kingscote Town Hall Emu Bay, Bay of Shoals, Kingscote, Brownlow and Nepean Bay    

Friday, September 14:

9am – 11am American River Hall American River, Sapphiretown, Island Beach & D’Estrees Bay    

Friday, September 14:

1pm – 3pm Penneshaw CFS Penneshaw, Baudin Beach, Brown Beach, Antichamber Bay  

If you would like to know more about the project, visit www.kangarooisland.sa.gov.au/coastalhazardmapping or contact Anna Osman, Project Coordinator on 0427 994 226.  

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