Catchments and Workareas.

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Some of the catchments.
The area where SWRDC, other active local bushcare groups and contractors regularly undertake weed control is extensive, covering more than 850 ha. To strategically manage such a large area we have broken it down into 14 catchments and precincts.

These catchments and precincts have then been further subdivided into work management areas (more than 80 so far). Work management areas are usually defined by the location, weed populations, tracks, natural features and/or barriers. Each work management area has been surveyed and assessed and an action plan developed and costed for up to 10 years.

For example, Catchment 2, "North Smoky", can be seen on the map at the left, and is described as:-
"Covering the area north from the lighthouse to Green Island Track and up to the ridgeline of Big Smoky. The area is approximately 210ha after factoring in the steep slopes across much of the catchment. Mainly eucalypt with gully patches of rainforest and some Themeda grass below lighthouse. Access via Jack Perkins track from lighthouse BBQ area, beach, and Green Island Track."

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Workareas provide fine-grained definition of each catchment area, according to specific plant communities, weed problems, or geographical features. They allow all those working on the site to have a clear and ready understanding of what is to be done, and act as a baseline for progress reporting.

Again as an example, work area "2O" just below the lighthouse is defined as:-
"Section of littoral rainforest North from lighthouse. Rainforest has well-developed canopy in the central sections but edges have significant infestations of Senna, Lantana, and scattered patches of Bitou, with some Madiera Vine below the Cottages".
"Contractors to do further primary control for all species, with volunteer follow-up. Abseilers to work on steep slopes and cliffs as bitou re-seeds. Monitor Quadrat 5. Estimate for funding requirement for next ten years is $9,800.

View a larger map showing workarea 2O here.

A map of catchments and work areas can be viewed with Google Earth here. Most areas, when clicked, show a brief description of that area.

View a sample page from our workareas spreadsheet here

Quadrats. In 2009-10 13 "quadrats" were set up by NPWS, in order to monitor changes in vegetation in specific but representative parts of the site. Each quadrat will be monitored regularly via a photo survey, and then re-surveyed after two years.

A quadrat is just a small area, typically say 20m x 20m. Within that area, inventory is kept of the number and species of trees, shrubs, low plants, and grasses, together with the percentage cover for each species. We thus have an accurate measure of change in plant population over time.

View a sample page quadrat report here or view the location of all quadrats here.