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  • sand-dunes.au
  • More
    • Home
    • WHAT IS IT
    • Why it works
    • Projects
    • Installation
    • Contact Us
    • sand-dunes.au
  • Home
  • WHAT IS IT
  • Why it works
  • Projects
  • Installation
  • Contact Us
  • sand-dunes.au

Challenges

Over 4000 square kilometres of mangroves to be restored by 2030 (Global Mangrove Alliance) That's 1.5 square kms per day every day for 7 years!

The most common restoration method is the planting of mangrove saplings which is slow, costly and has limited success. Saplings take around 9-12 months to produce with a commercial cost of around $10 per sapling. Unfortunately the success rate of planted saplings growing to a mature tree is only around 10%. 


Solution

2 volunteers can install over 300 square meters of our device per day.

A team of 12 volunteers can install over 1.5 square kilometres in only 1 week.

The cost of our device is currently $9 per device. Our success rate is a mature tree per 1.5 square meters at a cost of $36 per square meter.


Why it works

Each river system has its own unique makeup of mangrove species. It is difficult to commercialise seedling production to match each system, so more times than not, mangrove restoration projects fail due to a mismatch of species for a particular system.

Our device captures the seeds that naturally occur within that river system. They then only germinate in the areas along the bank where they normally would within that system. The prefect situation of the same seeds naturally germinating in the same soil/sand composition at the right time of the year.

Set and forget. During the life of the device, it will capture around 3-4 seasons worth of seeds before it has biodegraded away. It can be rapidly installed at any time of the year and requires no maintenance.

Mooloolah River Project

This trial was a huge success.

  • It has been a completely “set and forget” process. There is no need for any future removal works as the product is successfully biodegrading.
  • The product was quick and easy to install with zero impact on the surrounding environment
  • The device has reversed the erosion in the area and has captured an estimated 20 tonnes of sediment and prevented this from washing into the ocean
  • It has completely protected the mud bank behind the site area. The banks adjacent to the site have eroded by around 1 metre in the past 3 years. That is thousands of tonnes of sediment washing into the oceans.
  • It has successfully captured seeds resulting in around 60 healthy mangroves growing in an area of just 5m x 15m.
  • Crabs and worms moved back into the area due to the protected environment
  • Not a single device washed away or was removed by the public. This includes a major flood event in 2022 where the mud banks adjacent to the site eroded 30cm in just a few days.
  • Zero complaints were received by Council

All of the above benefits for a total installed cost of less than $4,000.

CQUniversity and Gladstone Ports Project

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