GRT field walk

Annual field walk looks at group GRT control More than 18 landholders attended the Upper Broken River catchment’s Giant rat’s tail grass (GRT) field walk on 3 June. Landholder feedback on their GRT grass control efforts was a key focus, along with demonstrations...

Veg workshop

NQ Dry Tropics Senior Project Officer Cherry Emerick welcomes 20 landholders to the the Landholders Driving Change (LDC) Vegetation Management and Reef Protection Regulations workshop, Bowen River Hotel. Brett Scott, Flagstone, and Jim Hillier, Glenmore, at the...

Property visits

Big turnout for two days of property visits focusing on erosion and productivity Graziers visited two properties – Glenalpine and Strathalbyn – to review methods being trialed to remediate gullies and unproductive land, while improving pasture cover.  The...

Weed together

Weeds in the spotlight Weeds are a huge cost to the grazing businesses. They put productivity, the environment, and livelihoods under pressure. More than 50 people attended weeds field days to discuss solutions. Invasive weeds are a serious problem in North...

Mt P data

Early data shows encouraging progress at Mt Pleasant Learning Hub The 2019-20 wet season monitoring results are in for the Mt Pleasant Learning Hub and they show an improvement in vegetation on the hillslope and the gully of the treatment site. The Mount Pleasant...

Grass ID Mt P

Pasture grass identification the focus of Mt Pleasant field day A well-managed pasture provides a security blanket for the land, good nutrition for livestock, and a healthy bottom line. Ecologist and botanist Dr Greg Calvert was guest speaker at a pasture species...
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.