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Gold Coast Beach Nourishment Project

Click to enlargeFinal Day of nourishment – 28 September 2017 – Cavill Avenue, Surfers Paradise

Final day of nourishment 28 September
2017 – Cavill Avenue, Surfers Paradise.

In 2017 we spent five months topping up our beaches with sand so they'd be more resilient to the impacts of storms and severe weather.

The Gold Coast Beach Nourishment Project (GCBNP) delivered more than 3 million cubic metres of sand across many of our stunning beaches. There's always plenty of sunshine on the Gold Coast but read about how this project created lots of rainbows too.

Overview of project

Beach nourishment projects have been undertaken on the Gold Coast since the 1960s. The aim is to increase the width of our beaches with additional sand so our coastline is more resilient to storm damage, erosion, and to ensure there's more useable beach for the community. The sand is delivered to specific locations to mimic natural coastal processes which allow sand to shift continuously in response to changing waves and water levels.

Our most recent sand nourishment project used a specialised dredge vessel to transfer sand from our offshore sand reserves and place it around the nearshore wave breaking zone.

The dredge delivered the sand by “bottom dumping” and “rainbowing”. “Bottom dumping” is where the collected sand is deposited to the wave breaking zone through the vessel hull. As the name suggests, “rainbowing” involves the sand being projected from the bow of the vessel as a sand/water mixture in a huge arc, just like a rainbow!

The image below shows where more than 3 million cubic metres of sand was strategically placed along the Gold Coast in 2017.

 

Where is the sand now?

The City has continued to monitor and collect data about Gold Coast beaches after sand nourishment.

The data shows the additional sand has moved both onshore and into the sand bar systems. This increase in overall beach sand volumes and beach width has improved beach amenity.

Due to the overall increase in sand volumes, both in the surf zone sand bars and on the upper beach, Gold Coast beaches are more resilient to the impacts of coastal storms, and are more accessible, with a balance of sand for walking, playing and relaxing.

Click to enlarge imageBeach width before beach nourishment Image date: 17 Feb 2017

Beach width before beach
nourishment
Image date: 17 Feb 2017

Click to enlarge imageBeach width two years after beach nourishment Image date: 14 Oct 2019

Beach width two years after beach nourishment
Image date: 14 Oct 2019

Click to enlarge imageOffshore sand bar – acting as a defence for the upper beach Image date: 9 Aug 2019

Offshore sand bar – acting as a
defence for the upper beach
Image date: 9 Aug 2019

 

Project image gallery

Click to enlarge

Gold Coast beach nourishment
Gold Coast beach nourishment
Gold Coast beach nourishment
Gold Coast beach nourishment
Gold Coast beach nourishment
Gold Coast beach nourishment
Gold Coast beach nourishment
Gold Coast beach nourishment
Gold Coast beach nourishment

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