David Hardwick

Long-term partner working to improve soil healthDavid Hardwick has worked on numerous NQ Dry Tropics projects, working with graziers to provide knowledge and skills to improve soil health on their properties.David has helped NQ Dry Tropics develop a Rapid Assessment...

Herd performance

Herd management and pregnancy testing workshop I’ve learnt a lot about the technical aspects of testing cows and foetal aging.  Ian showed us with a sample from the meatworks where all the anatomy was and how to find the foetus.  We then moved to the practical...

Whoa boys work

Ross Tapiolas points out the pasture growth near one of the whoa boys on his property Six Mile Creek runs clear even after record rainfall Published details Whoa boys stand up to monsoon at 6 Mile Creek Station A series of erosion control measures installed at a...

RASH toolbox

Soil guide, videos help farmers assess soil health David Hardwick addresses Bowen horticulturists about the importance of maintaining soil health David Hardwick explains how to measure the infiltration rate in soils. Publishing details Online toolbox launched NQ DRY...

Taking Stock

Raymond Stacey, RCS, leads workshop participants through an exercise in the paddock LDC’s Lisa Hutchinson, Leanne and Barry O’Sullivan, Glenalpine Station, and Mick Shannon. Michael Pini, Lancewood, Lyle Gilham, Suttor Creek Pastoral Co., and Matthew Salmond, Lestree...

Water quality group formed

Monitoring group mobilises for ex-Cyclone Penny deluge Steve Lewis, TropWATER (left), Exevale Station grazier Buster O’Loughlin and LDC MERI Officer Barb Colls during a training visit to Exevale Station Published details Bowen and Collinsville graziers have...
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.