Impact of data quality and model complexity on prediction of pesticide leaching

Journal of Environmental Quality
R L DannL Pang

Abstract

Accurate input data for leaching models are expensive and difficult to obtain which may lead to the use of "general" non-site-specific input data. This study investigated the effect of using different quality data on model outputs. Three models of varying complexity, GLEAMS, LEACHM, and HYDRUS-2D, were used to simulate pesticide leaching at a field trial near Hamilton, New Zealand, on an allophanic silt loam using input data of varying quality. Each model was run for four different pesticides (hexazinone, procymidone, picloram and triclopyr); three different sets of pesticide sorption and degradation parameters (i.e., site optimized, laboratory derived, and sourced from the USDA Pesticide Properties Database); and three different sets of soil physical data of varying quality (i.e., site specific, regional database, and particle size distribution data). We found that the selection of site-optimized pesticide sorption (Koc) and degradation parameters (half-life), compared to the use of more general database derived values, had significantly more impact than the quality of the soil input data used, but interestingly also more impact than the choice of the models. Models run with pesticide sorption and degradation parameters derive...Continue Reading

References

Jun 13, 2001·Journal of Environmental Quality·J E BarbashR J Gilliom

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Citations

Nov 6, 2007·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Eucarlos L MartinsCláudio A Spadotto
Apr 15, 2010·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Annemieke FarenhorstPeter McQueen
Feb 15, 2011·International Journal of Environmental Research and Public Health·Tejaswini P ReddyP Hemachandra Reddy
Oct 4, 2007·Chemosphere·John S FureyMichael Michel
Feb 4, 2010·Pest Management Science·L Jason KrutzSteven J Thomson
Sep 4, 2015·Integrated Environmental Assessment and Management·Patrick GagnonGérald Chouinard
Aug 19, 2007·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Ona SakalieneKurt A Spokas
Dec 5, 2018·Journal of Environmental Quality·Ling OuMatthew L Polizzotto
May 21, 2008·Journal of Agricultural and Food Chemistry·Alegria CabreraMichael J Sadowsky
Jun 24, 2008·Journal of Agricultural and Food Chemistry·Jussara B Regitano, William C Koskinen

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