Calibration of pesticide leaching models: critical review and guidance for reporting

I G Dubus, S Beulke, C D Brown

Research output: Contribution to journalLiterature reviewpeer-review

Abstract

Calibration of pesticide leaching models may be undertaken to evaluate the ability of models to simulate experimental data, to assist in their parameterisation where values for input parameters are difficult to determine experimentally, to determine values for specific model inputs (eg sorption and degradation parameters) and to allow extrapolations to be carried out. Although calibration of leaching models is a critical phase in the assessment of pesticide exposure, lack of guidance means that calibration procedures default to the modeller. This may result in different calibration and extrapolation results for different individuals depending on the procedures used, and thus may influence decisions regarding the placement of crop-protection products on the market. A number of issues are discussed in this paper including data requirements and assessment of data quality, the selection of a model and parameters for performing calibration, the use of automated calibration techniques as opposed to more traditional trial-and-error approaches, difficulties in the comparison of simulated and measured data, differences in calibration procedures, and the assessment of parameter values derived by calibration. Guidelines for the reporting of calibration activities within the scope of pesticide registration are proposed.

(C) 2002 Society of Chemical Industry.

Original languageEnglish
Pages (from-to)745-758
Number of pages14
JournalPest management science
Volume58
Issue number8
DOIs
Publication statusPublished - Aug 2002

Keywords

  • pesticide leaching
  • validation
  • evaluation
  • extrapolation
  • inverse modelling
  • guidelines
  • DATA SET
  • SENSITIVITY ANALYSIS
  • GROUNDWATER CONTAMINATION
  • AUTOMATIC CALIBRATION
  • SIMULATION-MODELS
  • PREFERENTIAL FLOW
  • AGRICULTURAL CHEMICALS
  • HYDRAULIC CONDUCTIVITY
  • REGISTRATION PURPOSES
  • PARAMETER-ESTIMATION

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