期刊
MARINE POLLUTION BULLETIN
卷 65, 期 4-9, 页码 182-193出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2011.08.025
关键词
Great Barrier Reef; Pesticide delivery; Pollutant loads; Water-sediment partitioning; Diuron; Atrazine
资金
- Australian Government
- Queensland Government
- NQ Dry Tropics
- Reef Rescue Initiative
- Marine and Tropical Sciences Research Facility, implemented in North Queensland
- Reef and Rainforest Research Centre Ltd.
This study examined the temporal variability in herbicide delivery to the Great Barrier Reef (GBR) lagoon (Australia) from one of the GBR catchment's major sugarcane growing regions. Annual loads of measured herbicides were consistently in the order of 200+ kg. Atrazine, it's degradate desethylatrazine, and diuron contributed approximately 90% of annual herbicide load, with early 'first-flush' events accounting for the majority of herbicide loads leaving the catchment. Assessment of herbicide water-sediment partitioning in flood runoff highlighted the majority of herbicides were transported in predominantly dissolved form, although a considerable fraction of diuron was transported in particulate-bound form (ca. 33%). Diuron was also the herbicide demonstrating the highest concentrations and frequency of detection in sediments collected from catchment waterways and adjacent estuarine-marine environments, an outcome aligning with previous research. Herbicide physico-chemical properties appear to play a crucial role in partitioning between water column and sediment habitat types in GBR receiving ecosystems. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
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