Herbicide Fate and Transport in the Great Barrier Reef: A Review of Critical Parameters

Article


Nahar, Kamrun, Baillie, Justine and Zulkarnain, Noor Azwa. 2023. "Herbicide Fate and Transport in the Great Barrier Reef: A Review of Critical Parameters." Water: an open access journal. 15 (2), pp. 1-18. https://doi.org/https://doi.org/10.3390/w15020237
Article Title

Herbicide Fate and Transport in the Great Barrier Reef: A Review of Critical Parameters

ERA Journal ID123718
Article CategoryArticle
AuthorsNahar, Kamrun, Baillie, Justine and Zulkarnain, Noor Azwa
Journal TitleWater: an open access journal
Journal Citation15 (2), pp. 1-18
Article Number237
Number of Pages18
Year2023
PublisherMDPI AG
Place of PublicationSwitzerland
ISSN2073-4441
Digital Object Identifier (DOI)https://doi.org/https://doi.org/10.3390/w15020237
Web Address (URL)https://www.mdpi.com/2073-4441/15/2/237
Abstract

Herbicides used for weed management on agricultural land in Australia’s Great Barrier Reef catchments are a key concern for its ecosystem, including the lagoon’s marine plants and corals, whose productivity has been found to decline. The most reliable way to assess herbicide risk is by monitoring a site regularly, but this is costly and time-consuming, so numerical simulations and computer models are an alternative method. Despite the availability of low-cost and less labor-intensive modelling methods, they have been limited in their effectiveness due to a lack of specific herbicide usage data and an inadequate understanding of the breakdown and transport processes of herbicides after application. This paper reviews current findings regarding herbicide risk in all Great Barrier Reef catchments according to their agricultural land use, and the most recent Reef Water Quality Protection Plan recommendations. The various pathways for fate and transport of the herbicides were also examined, and a list of critical parameters was developed to help with computer simulations. The accuracy and reliability of modelling can be improved by including aerial drifts, interceptions by crop residues, mechanisms within the root zone, and subsurface and groundwater contributions to the herbicide load in the GBR lagoon. Moreover, the findings will provide new directions for management practices adoption data with the fate and transport model from paddock to reef and improve the reliability of model results.

Keywordsfate; great barrier reef; herbicide; modelling; transport
Article Publishing Charge (APC) FundingOther
Contains Sensitive ContentContains sensitive content
ANZSRC Field of Research 2020400513. Water resources engineering
401103. Global and planetary environmental engineering
401106. Waste management, reduction, reuse and recycling
Byline AffiliationsSchool of Agriculture and Environmental Science
School of Engineering
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