title: Tebuthiuron Movement via Leaching and Runoff from Grazed Vertisol and Alfisol Soils in the Brigalow Belt Bioregion of Central Queensland, Australia.
abstract: Tebuthiuron is one of five priority herbicides identified as a water pollutant entering the Great Barrier Reef. A review of tebuthiuron research in Australia found 13 papers, 6 of which focused on water quality at the basin scale (>10,000 km(2)) with little focus on process understanding. This study examined the movement of tebuthiuron in soil and runoff at the plot (1.7 m(2)) and small catchment (12.7 ha) scales. The greatest concentration and mass in soil occurred from 0 to 0.05 m depth 30-57 days after application. Concentrations at all depths tended to decrease after 55-104 days. Runoff at the small catchment scale contained high concentrations of tebuthiuron (average = 103 μg/L) 100 days after application, being 0.05% of the amount applied. Tebuthiuron concentrations in runoff declined over time with the majority of the chemical in the dissolved phase.
authors.affiliation: Department of Natural Resources and Mines , P.O. Box 1762, Rockhampton, Queensland 4700, Australia.
authors.forename: Craig M
authors.initials: CM
authors.lastname: Thornton
authors.affiliation: Department of Natural Resources and Mines , P.O. Box 1762, Rockhampton, Queensland 4700, Australia.
authors.forename: Amanda E
authors.initials: AE
authors.lastname: Elledge
mesh_terms: D004784:Environmental Monitoring; D006540:Herbicides / Q000737:chemistry*; D007700:Kinetics; D008782:Methylurea Compounds / Q000737:chemistry*; D011793:Queensland; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000737:chemistry*; D012995:Solubility; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D006540:Herbicides; D008782:Methylurea Compounds; D012987:Soil; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; C010346:tebuthiuron
keywords: Brigalow Catchment Study; brigalow; grazing; herbicide; leaching; pesticide; runoff; soil; tebuthiuron