Difference between revisions of "Barratta Creek"
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* [[Water Quality Monitoring]]
* [[Water Quality Monitoring]]
Revision as of 01:27, 19 December 2007
Based on the iTRARC analysis this catchment has declined from excellent condition (A+) in the 1970s to relatively good condition (B) in 2004. The decline in condition is the result of floodplain clearing including forest, an increase of bare soil on the floodplain and an increase in scalding. Despite the changes that have occurred within the catchment it continues to provide a wide range of riparian habitats (hence the B iTRARC score), and the field survey results are consistent with this assessment. The level of regeneration is high, indicating good riparian condition into the future. However the weed species, particularly the high cover encountered at East Barratta Creek are of concern.
Although its flow regime through the lower half of the catchment has been significantly modified from seasonal to perennial due to tailwater discharge from irrigated cane farms, Barratta Creek is one of the most important, healthy and productive creek systems in the Burdekin catchment. It includes many large, permanent wetlands and long lengths of perennially-flowing creek. Unlike most other coastal creek systems in the region, there are no major fish passage barriers. Riparian habitat condition is generally good though threatened by weeds and inappropriate fire management. Tributaries such as Pelican Creek and the Collinsons Lagoon systems are in very poor condition, with loss of riparian vegetation and domination by aquatic weeds, but are worthy of rehabilitation. The lower catchment includes wetlands listed in the Directory of Important Wetlands, and as part of the Bowling Green Bay National Park and RAMSAR site.
The monitoring sites in the Baratta Creek:
- Upper Barratta Creek is located at the Viv Cox Bridge and has been sampled by the ACTFR for 3 years. The catchment area for this monitoring site is 691 sq km, of which 84,2% is used for grazing and 14,68% for cropping.
- East/ West Barratta Creek are located along the Bruce Highway and has been sampled by the ACTFR for 3 and the other for 4 years. The catchment area for this monitoring site is 912 sq km, of which 72,1% is used for grazing and 24,72% for cropping.
- Water Quality Monitoring
- Water Quality Monitoring results
- Event-based community water quality monitoring in the Burdekin Dry Tropics Region: 2002-2007. Volume 1
- Event-based community water quality monitoring in the Burdekin Dry Tropics Region: 2002-2007. Volume 2
- Water Quality Issues In The Tully Region
The following statistics are summarized from the CSIRO report: Improved SedNet Modelling of Grazng Lands in the Burdekin Catchment by Kinsey-Henderson, A., Sherman, B. and Bartley, R. 2007.
This report can be accessed from the report section below.
- Sub-catchment area: 1,009 sq. km.
- Source contributions: Hillslope = 68%; Gully = 15%; Streambank = 17%
- Area of sub-catchment with <50% ground cover: 61 sq. km or 6% of sub-catchment
- Hillslope sediment supply: 407 kg/ha/yr
- Total suspended sediment (flow weighted) supply: 60 kt/yr
- Total suspended sediment end-of-subcatchment (flow weighted) yield: 49 kt/yr
- Event Mean Concentration (EMC - flow weighted): 272 mg/l
- Mean Annual Flow: 178,423 ML
Please feel free to download the maps in the following formats:
- Riparian Condition assessment for CCI (2.8 Mb)
- Assessing the Burdekin subcatchments wetland condition (10 Mb)
- Burdekin Water Quality Issues Report (3.6 Mb)
- Monitoring of sediments and nutrients in the Burdekin Dry Tropics region: 2005-06 wet season (4.3 Mb)
- Event based Water Quality Monitoring in the Burdekin Dry Tropics Region: 2004/05 wet season (3.1 Mb)
- A report into the water quality condition of the Burdekin River and surrounds based on the AIMS end-of-catchment sampling program (13.2 Mb)
- Pesticides in the lower Burdekin and Don River catchments
- Limnological assessment and benchmarking of key sentinel wetlands in the Burdekin catchment
- Fish habitat assessment and rehabilitation in the Burdekin Delta Distributary Streams