Use of simulation models for registration purposes: Evaluation of pesticide leaching to groundwater in the Netherlands

Brouwer, W.

doi:10.1080/10934529409376098

Cited by 6 publications

(4 citation statements)

References 4 publications

(5 reference statements)

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“…Weber & Whitacre (1982) stated that the most satisfactory method for evaluating the relative mobility of a given pesticide through soil is one which best approximates actual field conditions and which is reproducible. Brouwer (1994) indicates that mobility studies must include both batch equilibration and column leaching experiments to assess the groundwater pollution potential of a given compound.…”

Section: Introductionmentioning

confidence: 99%

Effect of flow rate on the adsorption and desorption of glyphosate, simazine and atrazine in columns of sandy soils

Beltrán

Gerritse

Hernández

1998

European J Soil Science

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Summary Adsorption and desorption of the herbicides glyphosate [N‐phosphonomethyl‐aminoaceticacid], simazine [6‐chloro‐N,N′‐diethyl‐1,3,5‐triazine‐2,4‐diamine] and atrazine [6‐chloro‐N2‐ethyl‐N4‐isopropyl‐1,3,5‐triazine‐2,4‐diamine] were studied in four sandy soils from Western Australia. Distribution coefficients (Kds) were calculated from breakthrough curves (BTCs) resulting from leaching step changes in concentrations through small saturated columns of soil at flow rates ranging from 0.3 to 30 m day–1. A comparison was made with Kds obtained after batch equilibrating solutions of the herbicides with the same soils. The Kds of herbicides in soils decreased with increasing flow rate and most strongly for glyphosate in soils rich in clay content. Resulting increases in mobility of about 40–50% were estimated for simazine and atrazine and > 50% for glyphosate at flow rates of 3 m day–1. Adsorption and desorption rates were estimated by fitting numerically simulated BTCs to experimental BTCs. Best fits were obtained with a time‐dependent Freundlich adsorption equation. The resulting coefficient for time dependency in the equation suggests that the rates of adsorption and desorption are controlled mainly by diffusion in an adsorbing layer on or in soil particles.

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Section: Introductionmentioning

confidence: 99%

Effect of flow rate on the adsorption and desorption of glyphosate, simazine and atrazine in columns of sandy soils

Beltrán

Gerritse

Hernández

1998

European J Soil Science

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“…Applications of these models include use as research tools, support for environmental safety assessments, and design of approaches to manage risks of pesticides (Addiscott and Wagenet, 1985;Kohne et al 2008). In many cases, models simulate fate of pesticides in soil as a necessary step in quantifying transfer into non-target compartments including groundwater (Boesten, 1994;Brouwer, 1994, Tiktak et al 2002, surface water (Carsel et al 1985;Singh and Kanwar, 1995;Jarvis and Larsbo, 2012), crops (Fantke et al 2013), and air (Bedos et al 2009). In each instance, it has been sufficient to treat soil as a 1dimensional system; this system varies in the vertical plane due to variation in boundary interfaces, soil properties, root distribution, pesticide inputs, water fluxes and so on, but variation in the horizontal plane is ignored.…”

Section: Introductionmentioning

confidence: 99%

Introducing the 2-DROPS model for two-dimensional simulation of crop roots and pesticide within the soil-root zone

Agatz

Brown

2017

Science of The Total Environment

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Mathematical models of pesticide fate and behaviour in soils have been developed over the last 30years. Most models simulate fate of pesticides in a 1-dimensional system successfully, supporting a range of applications where the prediction target is either bulk residues in soil or receiving compartments outside of the soil zone. Nevertheless, it has been argued that the 1-dimensional approach is limiting the application of knowledge on pesticide fate under specific pesticide placement strategies, such as seed, furrow and band applications to control pests and weeds. We report a new model (2-DROPS; 2-Dimensional ROots and Pesticide Simulation) parameterised for maize and we present simulations investigating the impact of pesticide properties (thiamethoxam, chlorpyrifos, clothianidin and tefluthrin), pesticide placement strategies (seed treatment, furrow, band and broadcast applications), and soil properties (two silty clay loam and two loam top soils with either silty clay loam, silt loam, sandy loam or unconsolidated bedrock in the lower horizons) on microscale pesticide distribution in the soil profile. 2-DROPS is to our knowledge the first model that simulates temporally- and spatially-explicit water and pesticide transport in the soil profile under the influence of explicit and stochastic development of root segments. This allows the model to describe microscale movement of pesticide in relation to root segments, and constitutes an important addition relative to existing models. The example runs demonstrate that the pesticide moves locally towards root segments due to water extraction for plant transpiration, that the water holding capacity of the top soil determines pesticide transport towards the soil surface in response to soil evaporation, and that the soil type influences the pesticide distribution zone in all directions. 2-DROPS offers more detailed information on microscale root and pesticide appearance compared to existing models and provides the possibility to investigate strategies targeting control of pests at the root/soil interface.

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“…Trabalhos mostrando a avaliação de alguns desses simuladores para predição da lixiviação de pesticidas em solos foram realizados principalmente na América do Norte e Europa (Carsel et al, 1986;Pennell et al, 1990;Loague & Green, 1991;Parrish et al, 1992;Shirmohammadi & Knisel, 1994;Walker et al, 1996). Países como a Holanda (Brouwer, 1994) e Alemanha (Klein, 1995) têm utilizado alguns desses simuladores como instrumento para amparar os órgãos competentes com relação ao impacto ambiental e registro de pesticidas.…”

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Avaliação de dois simuladores para predição da lixiviação de sulfona de aldicarbe em um Latossolo Vermelho-Amarelo

Júnior¹,

Rigitano²,

Lima³

et al. 2000

Pesq. agropec. bras.

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Este trabalho teve por objetivo o estudo da lixiviação de sulfona de aldicarbe em um Latossolo Vermelho-Amarelo, na região de Lavras, MG, para posterior comparação com os resultados obtidos pelos simuladores CALF e PESTLA. Os resultados mostraram alta lixiviação de sulfona de aldicarbe no solo em estudo. Aos 44 dias após a aplicação do inseticida e com uma lâmina de água acumulada de 241,4 mm, a quantidade média de sulfona de aldicarbe remanescente nas colunas de solo de 45 cm de profundidade foi equivalente a 17,92% (±5,88) da dose aplicada, enquanto os simuladores CALF e PESTLA estimaram 20,52% e 37,82%, respectivamente. O simulador CALF gerou melhores estimativas da quantidade média de sulfona de aldicarbe no perfil do solo nas diferentes datas de amostragem, enquanto o simulador PESTLA gerou melhores estimativas da distribuição do inseticida ao longo do perfil do solo, nas diferentes datas de amostragem.

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Use of simulation models for registration purposes: Evaluation of pesticide leaching to groundwater in the Netherlands

Cited by 6 publications

References 4 publications

Effect of flow rate on the adsorption and desorption of glyphosate, simazine and atrazine in columns of sandy soils

Effect of flow rate on the adsorption and desorption of glyphosate, simazine and atrazine in columns of sandy soils

Introducing the 2-DROPS model for two-dimensional simulation of crop roots and pesticide within the soil-root zone

Avaliação de dois simuladores para predição da lixiviação de sulfona de aldicarbe em um Latossolo Vermelho-Amarelo

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