Leadership program

Leadership program participants, (back row, from left): Christian Cormack, Glenbowen, Bristow Hughes, Strathalbyn, Buster O’Loughlin, Exevale, Bob Harris, Glencoe, Barry O’Sullivan, Glenalpine, Reid Muirhead, Weetalaba, and (front row) Lucy Pepper, Terry Creek,...

Mt Wickham update

The Mt Wickham site, pictured in February 2019, after initial projects works were tested by 350mm of rain in 48 hours. Mt Wickham the first trial on a big-scale gully The Landholders Driving Change Landscape Remediation Activity Area is about trialling different...

War on GRT

War on weeds at Eungella and Crediton focuses on Giant rat’s tail grass Cloudbreak Lowlines Farm grazier Kell Tennent (left) and DAF Senior Biosecurity Officer John Reeve inspect a paddock containing GRT. The enemy: a clump of giant rat’s tail grass (GRT)....

Braithwaite column

Beef production vet Ian Braithwaite is a beef production vet who works in northern Australia with a range of corporate and family beef operations.  Ian maintains that production systems should be designed around the financial and climatic constraints of your business...

Whoa boy video

Whoa boys prevent water damage to roads, tracksFast flowing water caused by heavy rainfall can wreak havoc on rural roads and access tracks, and fencelines.Constructing erosion control banks, also known as whoa boys, is a simple and cost-effective way to slow down and...

Gully video

Video outlines range of gully strategiesWhen tackling soil erosion on grazing lands, it’s important to treat both the cause and symptoms.NQ Dry Tropics works closely with landholders on strategies that promote better pasture cover, and help hydrate landscapes by...
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

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 #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 #5

KEQ #6

KEQ #7
KEQ #8

 

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.