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2002 – 2013: Dumbleton Weir Pioneer River (Qld). Pesticides: Diuron, Atrazine, Desethylatrazine, Hexazinone, Ametryn, 2,4-D

PIONEER RIVER CATCHMENT EVENT BASED WATER QUALITY SAMPLING

Ian White1, Jon Brodie2 and Carl Mitchell3

1. NRM, Mackay, 2. ACTFR, James Cook University, Townsville, 3. Healthy Waterways Program, Mackay

“Residues of five herbicides were found at Dumblet on Weir during the event. Pesticides found were diuron, ametryn, atrazine, hexazinone and 2,4-D. Deset

hylatrazine, a degradation product of atrazine, was also recorded on the rising stage of the hydrograph. Concentrations of all of these pesticides were highest during the initial runoff and became diluted as the event progressed. No filtered samples were collected for the analysis of pesticides, therefore it is unknown what proportion of these chemical residues were carried on the sediment and how much was in solution …”

Dumbleton Weir detections (Ranges)

Diuron: 8.5ug/L – 0.9ug/L

Atrazine: 1.3ug/L – 0.29ug/L

Desethylatrazine: 0.1ug/L – 0.05ug/L

Hexazinone: 0.3ug/L – 0.11ug/L

Ametryn: 0.3ug/L – 0.1ug/L

2,4-D: 0.4ug/L – 0.2ug/L

https://www-public.jcu.edu.au/events/idc/groups/public/documents/journal_article/jcudev_015631~4.pdf

2012-2013

Pioneer River at Dumbleton Pump Station

Ametryn 28kg, Total Atrazine 460kg, Diuron 440kg, Hexazinone 93kg

Ametryn (Sugarcane) 0.091 kg/km2

Atrazine (Cropping, Forestry & Sugarcane) 0.68kg/km2

Diuron (Cropping, Horticulture & Sugarcane) 1.4kg/km2

Hexazinone (Cropping, Forestry and Sugarcane) 0.079kg/km2

Source: Reef Water Quality Protection Plan. Total Suspended Solids, Nutrients & Pesticide Loads (2012-2013) for Rivers that Discharge to the Great Barrier Reef – Great Barrier Reef Catchment Loads Monitoring 2012-2013

https://www.reefplan.qld.gov.au/measuring-success/paddock-to-reef/assets/2012-2013-gbr-catchment-loads-technical-report.pdf

This entry was posted in Homepage, Water Pollution on April 11, 2015 by Anthony.

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