Pasture iframe

Knowledge is power in the paddock A suite of workshops aimed at improving knowledge and skills of landholders is currently being developed for 2021-2023.  One was in March. These workshops will allow landholders to gain access to technical and specialist support and...

ReachOutKASA

Building skills and knowledge Get involved and enjoy the benefits Getting involved in the LDC project opens doors to access technical experts and a wide range of knowledge and skills-building workshops and training sessions. Improving the BBB community’s access to...

ReachoutLandManagement

Land management Land management actions The LDC team is helping landholders to incorporate a range of improved land management actions to improve productivity and land condition.  There are many options available to landholders, below are a few of those: fencing and...

ReachOutWorkingFile_LandscapeRemediation

Landscape remediationand restoration Projects LDC is helping landholders develop cost-effective designs to remediate gullies and other property erosion features to reduce soil erosion.  Technical experts are available to visit properties and conduct assessments to...

Staff training

Extension officers train to stay current in a changing world LDC project partners and landholders work really hard to trial and adopt land management practices to improve water quality flowing to the Great Barrier Reef (GBR). In February, NQ Dry Tropics hosted a...

Havilah gully

LDC’s fifth large gully repair will benefit two properties LDC’s fifth large-scale gully remediation site is at Havilah Station. Works are expected to start in July. The Havilah gully site has been selected as a priority project, based on the work completed 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.