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Healthy Country - The Bremer Catchment

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The Bremer Catchment

The Bremer catchment is located in South West of South East Queensland and spans an area of over 2,000 km2.

It is rich in natural beauty, with the surrounding mountains providing a magnificent backdrop to the rolling landscape.

It is bounded by the Main Range NationalPark to the south, Flinders Peak to the east and Mt Mort to the west.

The catchment also encompasses a diverse range of land uses which include agriculture, mining, industry, commerce, natural areas and urban development.

Unfortunately a history of tree clearing, creek bank modification and limited ground cover has led to highly degraded creeks and rivers susceptible to erosion.

As the river and creek banks become eroded, this further compromises native vegetation along the waterways which play an important role in binding the soil together and slowing down the flow of the river. Without this functionality, larger amounts of sediment and nutrients continue to pollute these waterways.

Upper Bremer focal area

The Upper Bremer was one of the focal areas within the Bremer catchment, where a range of projects were implemented to reduce sediment loss, including:

  • Reinstating an 800m long local wetland across two neighbouring properties along the Rosevale floodplain (winner of a Healthy Waterways Award). Wetlands within naturally occurring floodplains play an important role in slowing down the force of the water during heavy flows.
  • Installation of leaky weirs. A leaky or porous weir is a dam or barrier structure in a gully or waterway that holds water back, whilst slowly leaking water through the dam wall through a number of small pipes. Leaky weirs back up water during high flows to create a temporary pond, slowing the water and reducing its erosive power before it travels downstream.
  • The construction of river crossings and fencing to manage the movement of livestock and reduce high traffic areas along the creek bank contributing to erosion.
  • Remediating highly eroding gullies.
  • Revegetating the areas along the creek bank with native plants.

The Upper Warrill creek focal area

The Upper Warrill Creek sub-catchment (within the Bremer catchment) flows from the base of the Main Range National Park down to the Township of Aratula in the Scenic Rim Region.

This catchments spans almost 20,000 ha and is a productive agricultural sub-catchment, but due to its high gradient and largely cleared hillslopes, it is extremely susceptible to erosion from high-volume, high-velocity flows during heavy rainfall.

From 2012 to 2015 a wide range of projects were implemented in the Upper Warrill Creek catchment to share current best management practise to landholders and the wider community. These projects focused on improving grazing management to reduce sediment loss into Warrill Creek and further downstream.

Projects included:

  • Repairing and stabilising creek banks and gullies.
  • Fencing to help manage livestock movement and high traffic areas and to divide up different land types for improved land management.
  • Revegetation with native plants, which play an important role in binding the soil together and slowing down the flow of the creek.
  • Installing watering points for livestock away from the creeks susceptible to erosion.
  • Supporting research for horticultural cover crop options to reduce sediment loss.