A European test of pesticide-leaching models: methodology and major recommendations

Testing of pesticide-leaching models is important in view of their increasing use in pesticide registration procedures in the European Union. This paper presents the methodology and major conclusions of a test of pesticide-leaching models. Twelve models simulating the vertical one-dimensional movement of water, solute, heat, and, in particular, pesticides, through the soil profile were used by 36 different modellers. The adopted modelling codes differ in terms of modelling concepts and modelling hypothesis. Modellers were affiliated to industry and to the scientific community as well. Four quality datasets were identified to perform the analysis. The dataset included field and lysimeter data, collected in the Netherlands, Germany, Italy and the UK. As well, non-structured as structured soils were available in the dataset. To elucidate the ability to model correctly water transport, solute transport, heat transport and pesticide transport in soils, a stepwise evaluation approach was followed. Splitting up the experimental dataset enabled us to quantify the calibration capability and the prediction capability of the models. The simulations were performed by different model users enabling us also to characterise output variability in terms of user dependent interpretation of the model input and parameters. Recommendations are formulated for improving the quality of modelling datasets, and the process description of water, solute, and heat transport in a pesticide-leaching model, plus the process description of pesticide fate. Application of the principles of good modelling practice (GMP) is briefly described. (C) 2000 Elsevier Science B.V. All rights reserved.

[1]  Rosa Francaviglia,et al.  Simulation of soil water, bromide and pesticide behaviour in soil with the GLEAMS model , 2000 .

[2]  William A. Jury,et al.  Overview of Organic Chemical Environmental Fate and Transport Modeling Approaches , 1989 .

[3]  P. B. Leeds-Harrison,et al.  CRACK-NP: a pesticide leaching model for cracking clay soils. , 2000 .

[4]  Ilona Bärlund,et al.  Comparison of pesticide leaching models: results using the Weiherbach data set , 2000 .

[5]  D. Schäfer,et al.  The Weiherbach data set: An experimental data set for pesticide model testing on the field scale , 2000 .

[6]  A. Tiktak.  Application of pesticide leaching models to the Vredepeel dataset: II Pesticide fate , 2000 .

[7]  Ettore Capri,et al.  Comparing and evaluating pesticide leaching models: results for the Tor Mancina data set (Italy) , 2000 .

[8]  J.J.T.I. Boesten,et al.  Pesticide contamination of groundwater in western Europe , 1989 .

[9]  Bernd Diekkrüger,et al.  Modeling pesticide dynamics of four different sites using the model system SIMULAT , 2000 .

[10]  R. Faasen,et al.  Agricultural pesticide use a threat to the European environment , 1995 .

[11]  Marnik Vanclooster,et al.  Mathematical modelling for assessing pesticide leaching in agricultural soils at the field scale , 2001 .

[12]  Allan Walker,et al.  A Simulation Model for Prediction of Herbicide Persistence , 1974 .

[13]  Marco Trevisan,et al.  Modelling pesticide leaching in a sandy soil with the VARLEACH model , 2000 .

[14]  Bernd Diekkrüger,et al.  Environmental fate modelling of pesticides: from the laboratory to the field scale. , 1996 .

[15]  J.J.T.I. Boesten,et al.  Testing PESTLA using two modellers for bentazone and ethoprophos in a sandy soil , 2000 .

[16]  Marco Trevisan,et al.  Modelling ethoprophos and bentazone fate in a sandy humic soil with primary pesticide fate model PRZM-2 , 2000 .

[17]  Ettore Capri,et al.  Lysimeter experiments with metolachlor in Tor Mancina (Italy) , 2000 .

[18]  J.J.T.I. Boesten,et al.  Modeller subjectivity in estimating pesticide parameters for leaching models using the same laboratory data set , 2000 .

[19]  Bernd Diekkrüger,et al.  Validity of agroecosystem models a comparison of results of different models applied to the same data set , 1995 .

[20]  Marnik Vanclooster,et al.  Evaluation of pesticide dynamics of the WAVE-model , 2000 .

[21]  J. Boesten,et al.  Effects of Soil Heterogeneity on Pesticide Leaching to Groundwater , 1991 .

[22]  Michael Klein,et al.  Comparing and evaluating pesticide leaching models: Results of simulations with PELMO , 2000 .

[23]  Richard E. Green,et al.  Uncertainty in a pesticide leaching assessment for Hawaii , 1989 .

[24]  J. Nash,et al.  River flow forecasting through conceptual models part I — A discussion of principles☆ , 1970 .

[25]  Kurt D. Pennell,et al.  Evaluation of Five Simulation Models for Predicting Aldicarb and Bromide Behavior Under Field Conditions , 1990 .

[26]  T. R. Roberts,et al.  Environmental behaviour of agrochemicals , 1995 .

[27]  Lars Bergström,et al.  Evaluation and comparison of pesticide leaching models for registration purposes , 1994 .

[28]  Harry Vereecken,et al.  Simulation of water and solute transport in field soils with the LEACHP model , 2000 .

[29]  Peter H. Nicholls,et al.  Simulation of pesticide leaching at Vredepeel and Brimstone Farm using the macropore model PLM , 2000 .

[30]  Hassanizadeh Sm,et al.  SOTRAS report 5. PESTRAS v3.1: A one-dimensional model for the assessment of the fate of pesticides in soil , 1996 .

[31]  Bernd Diekkrüger,et al.  Comparison of the performance of pesticide-leaching models on a cracking clay soil: results using the Brimstone Farm dataset. , 2000 .

[32]  N. J. Jarvis,et al.  Sources of error in model predictions of pesticide leaching: a case study using the MACRO model , 2000 .

[33]  John A. Catt,et al.  Evaluating pesticide leaching models: the Brimstone Farm dataset , 2000 .

[34]  J.J.T.I. Boesten,et al.  Movement of water, bromide and the pesticides ethoprophos and bentazone in a sandy soil: the Vredepeel data set , 2000 .

[35]  Marnik Vanclooster,et al.  Application of pesticide simulation models to the Vredepeel dataset: I. Water, solute and heat transport , 2000 .