Describing the environmental fate of diuron in a tropical river catchment
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In: The Science of The Total Environment, Vol. 440, 01.12.2012, p. 178-185.
Research output: Journal contributions › Journal articles › Research › peer-review
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T1 - Describing the environmental fate of diuron in a tropical river catchment
AU - Camenzuli, Louise
AU - Scheringer, Martin
AU - Gaus, Caroline
AU - Ng, Carla A
AU - Hungerbühler, Konrad
N1 - Copyright © 2012 Elsevier B.V. All rights reserved.
PY - 2012/12/1
Y1 - 2012/12/1
N2 - The use of the herbicide diuron on sugarcane fields along the river catchments of the Great Barrier Reef (GBR) in Australia is an issue of concern due to high levels of diuron reported in the GBR lagoon, and has recently led to a restriction on the use of diuron during the 2011/12 wet season. An important question in this context is how much diuron is mobilised from the agricultural area by strong rainfall and floods in the wet season and transferred to the GBR lagoon. We have set up a multimedia chemical fate model for a tropical catchment to describe the fate of diuron within the Tully River catchment, Queensland, Australia. The model includes highly variable rainfall based on meteorological data from the Tully River catchment and a flood water compartment on top of the agricultural soil that is present during times for which floods were reported. The model is driven by diuron application data estimated for the Tully River catchment and is solved for time-dependent diuron concentrations in agricultural soil and seawater. Model results show that on average 25% of the diuron applied every year is transferred to the GBR lagoon with rainwater and flood water runoff. Diuron concentrations estimated for the seawater range from 0.1. ng/L to 12. ng/L and are in good agreement with concentrations measured in the GBR lagoon. The uncertainty of the diuron concentrations estimated for seawater is approximately a factor of two and mainly derives from uncertainty in the diuron degradation half-life in soil, properties of the soil compartment such as organic matter content, and the speed of the seawater current removing diuron dissolved in seawater from the seawater compartment of the model. © 2012 Elsevier B.V.
AB - The use of the herbicide diuron on sugarcane fields along the river catchments of the Great Barrier Reef (GBR) in Australia is an issue of concern due to high levels of diuron reported in the GBR lagoon, and has recently led to a restriction on the use of diuron during the 2011/12 wet season. An important question in this context is how much diuron is mobilised from the agricultural area by strong rainfall and floods in the wet season and transferred to the GBR lagoon. We have set up a multimedia chemical fate model for a tropical catchment to describe the fate of diuron within the Tully River catchment, Queensland, Australia. The model includes highly variable rainfall based on meteorological data from the Tully River catchment and a flood water compartment on top of the agricultural soil that is present during times for which floods were reported. The model is driven by diuron application data estimated for the Tully River catchment and is solved for time-dependent diuron concentrations in agricultural soil and seawater. Model results show that on average 25% of the diuron applied every year is transferred to the GBR lagoon with rainwater and flood water runoff. Diuron concentrations estimated for the seawater range from 0.1. ng/L to 12. ng/L and are in good agreement with concentrations measured in the GBR lagoon. The uncertainty of the diuron concentrations estimated for seawater is approximately a factor of two and mainly derives from uncertainty in the diuron degradation half-life in soil, properties of the soil compartment such as organic matter content, and the speed of the seawater current removing diuron dissolved in seawater from the seawater compartment of the model. © 2012 Elsevier B.V.
KW - Chemistry
KW - Diuron
KW - Multimedia fate modelling
KW - Pesticide
KW - River catchment
UR - http://www.scopus.com/inward/record.url?scp=84868686670&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/0ac3d240-990c-3914-985d-ec25ec110b47/
U2 - 10.1016/j.scitotenv.2012.07.037
DO - 10.1016/j.scitotenv.2012.07.037
M3 - Journal articles
C2 - 23026296
VL - 440
SP - 178
EP - 185
JO - The Science of The Total Environment
JF - The Science of The Total Environment
SN - 0048-9697
ER -