Scoping the work to be done at remediation sites. This one is at John Robinson’s plot on Corduroy Creek Road. Pictured are, from left, LDC’s Matt Miles, Barry Collett, Queensland Solar Maintenance, Graham Gordon, Two Mile, DAF’s Bob Shepherd, LDC’s Rodger Walker, Glencore’s David Gullo and Carl Groocock, Todsure.

Scottville Mob makes light work with many hands…

THE ‘Scottville Mob’ has proven that working together can result in great outcomes.  The cluster group developed an action plan to remediate erosion features on their properties, pooled resources, and as a result, all on-ground work is complete.

The Scottville Cluster Group is made up up landholders from five properties – Hillview, Two Mile, Emohruo, Todsure, and Two Mile.

The  focus of the cluster group was to: 

  • remediate small scale gullies and other severe property erosion features to reduce soil erosion;
  • improve access to land management technical support, extension, education, knowledge and on-ground learning opportunities for small landholders and community of the Scottville-Collinsville area; and
  • support landholders and the wider community to validate solutions for smaller scale erosion features.

DAF principal extension officer (grazing land management) Bob Shepherd provided expertise to help the cluster group develop cost-effective designs to remediate gullies and other property erosion features to reduce soil erosion.

Works included surface water diversion banks, installation of  rock chutes and gabion baskets, reshaping of erosion areas, and seeding topsoil on reshaped areas.

All on-ground works were carried out by local contractors.

Glencore provided in-kind support through sharing expertise and knowledge in landscape remediation techniques, and also provided the majority of rock for the rock chutes.

Projects undertaken by cluster groups are crucial for NQ Dry Tropics’ LDC project because they link to improved quality of water that leaves the properties. Remediation of erosion features, along with improvements in grazing land management and surface water management on-property will reduce erosion and sediment entering local waterways.

Installing gabions at Emohruo Station.

Remediation work at Hillview Station.


Reef regulations - grazing, standard conditions

  1. For land in good or fair condition (more than 50 per cent ground cover at 30 September), continue using measures to maintain land condition.
  2. For land in poor condition (less than 50 per cent ground cover at 30 September), steps must be taken to improve land condition.
  3. For land in degraded condition (less than 20 per cent ground cover at 30 September), steps must be taken to improve land condition OR prevent areas from further degrading or expanding.
  4. Keep records of measures taken and also of agricultural chemicals, fertiliser and mill mud or mill ash applied to land.
KEQ #8

KEQ #7
KEQ #6

KEQ #5

KEQ #4

The LDC project monitors four gully sites (represented in this table) with gold standard equipment and analysis, carried out by CSIRO.

Results have been compiled in a preliminary report from Bartley et al (2020), with the final report expected to be released by the end of 2020. The preliminary report shows all four sites have indicators of improvements, notably the Strathbogie and Mt Wickham sites.

KEQ #3

*The Exploring New Incentives activity area has provided an opportunity for graziers to adopt improved land management practices through a range of activities. For some of these properties, it was the first time they signed contracts for on-ground works.

KEQ #1

Figure 1. Total fine sediment reduction by project type and erosion source. Inset shows the proportion of the total project area for each project type.

These estimates have been calculated using two methods: 

1) The pollutant reduction component of the Alluvium/Great Barrier Reef Foundation (GBRF) investment tool for hillslope and streambank erosion management projects; 

2) The Reef Trust Gully Toolbox method for gully erosion management projects. The LDC Water Quality Report 2020 (Waterhouse et al., 2020) highlights that a number of assumptions underlay these calculations, therefore these figures should be treated as the best available estimate of sediment reductions to date.

Preventing sediment from reaching the Great Barrier Reef

Each wet season sediment is washed into local waterways and out to the Great Barrier Reef (GBR). 

Most sediment is very fine, and can stay suspended for a long time and can travel great distances. Valuable topsoil is lost from production, and increased concentrations on the reef can be harmful to seagrasses and corals. 

Landholders in the BBB have completed 69 on-ground water quality practice changes, and it is estimated that these have contributed a fine sediment reduction of 6,154 tonnes per year from reaching the GBR. 

Of this, approximately half of the sediment savings are attributable to grazing land management changes on hillslopes and streambanks, and the other half as a result of gully remediation treatments across a broad range of scales, as shown in the graphs above. 

The table below also highlights the relatively small area of intervention in the gully management projects compared to the large sediment savings that these can achieve - 60 per cent of the sediment savings over only 4 per cent of the project area.

Table 1. Estimated sediment reductions (tonnes) from projects completed in the LDC Project to date.

KEQ #2

*GLMWW = Grazing Land Management Wire and Water

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