Townsville Catchments

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Subcatchments

Smaller subcatchments within the Townsville Catchment include:

  • Stuart Creek
  • Ross River
  • Ross Creek
  • Bohle River
  • Black River
  • Deep Creek
  • Bluewater Creek
  • Sleeper Log Creek
  • Leichhardt Creek
  • Saltwater Creek
  • Surveyors Creek
  • Rollingstone Creek
  • Hencamp Creek
  • Skrubby Creek
  • Ollera Creek
  • Lorna Creek
  • Crystal Creek
  • Paluma Dam

Vegetation

Riparian Habitat

iTRARC analysis of Riparian Habitat indicates that the Townsville catchments have dropped from being in very good (A) condition to relatively poor (C+)condition in 2004. This is the result of clearing of vegetation along the main channel of the streams that drain these catchments combined with floodplain clearing.

iTRARC Scores

Catchment Class 1 B
Maximum iTRARC Score 20 (A+)
1970s Score 16 (A)
2004 Score 9 (C+)
Reduction in Ecosystem Services Moderate
Increase in Potential for Erosion Moderate
Reasons for Change in Score
  • Increased number and % of gaps in the riparian corridor of the main channel
  • Substantial floodplain clearing
  • Increased bare soil on the floodplain

TRARC (field survey) scores = No TRARC scores for this subcatchment

Reference:Assessing the condition of Riparian Vegetation in the Burdekin catchment

Flora

Survey of coastal vegetation in Townsville City Council Reserve at Rowes Bay

Water

SedNet Modelling of Water Quality

Model results for the Townsville subcatchment are summarized as follows:

  • Sub-catchment modelled area: 1,700 sq. km.
  • Source contributions: Hillslope = 55%; Gully = 4%; Streambank = 41%
  • Area of sub-catchment with <50% ground cover: 62 sq. km or 4% of sub-catchment
  • Hillslope sediment supply: 408 kg/ha/yr
  • Streambank sediment supply: 306 kg/ha/yr
  • Total suspended sediment (flow weighted) supply: 127 kt/yr
  • Total suspended sediment supply (flow weighted; normalized to area): 748kg/ha/yr
  • Total suspended sediment end-of-subcatchment (flow weighted) yield: 170 kt/yr
  • Event Mean Concentration (EMC - flow weighted): 447 mg/L
  • Mean Annual Flow: 380,853 ML

Reference: Improved SedNet Modelling of Grazing Land in the Burdekin Catchment

In summary, moderate to high mean annual flow (380,853 ML) together with moderate to high levels of total suspended sediments (127 kt/yr) result in low concentrations of sediments and associated nutrients (447 mg/L)in the Townsville Catchments. It is estimated that slightly over half of the sediments entering the waterways derive from hillslope erosion (55%), however a further 41% of sediments are the result of gully erosion providing 408 kg/ha/yr and 306 kg/ha/yr of sediment respectively.

The model suggests that only a small proportion of the Townsville subcatchments have less than 50% ground cover.

Water Quality Monitoring

Environmental Uses and Values

Stock Watering

Water supply for production of healthy livestock.

Visual Recreation

Swimming, recreational fishing, sailing and boating.

Drinking Water

Suitability of raw drinking water supply.

Cultural and Spiritual

Custodial use of water resources by Bindal and Wulgurukaha traditional owners.

References:

Landuse

Land Condition

No data available for land condition in the Townsville Catchments subcatchment.

Ground Cover

No data available for Ground Cover in the Townsville Catchments subcatchment.

Maps

References

TownsvilleCatchments.jpg

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