The Canadian

Centre for Environmental Modelling and Chemistry

SoilFug Model

Version 1.2 (16-bit) - December 1996

The SoilFug model assesses the potential for degrading reaction, evaporation, and leaching of a pesticide applied to a surface soil. The model includes a database of chemicals and soil types, however, the user can easily define new chemicals and soils. Output can be viewed as either tables or graphs.

This program was based on the following publications:

  • Di Guardo, A., Calamari, D., Zanin, G., Consalter, A., and Mackay, D. "A Fugacity Model of Pesticide Runoff to Surface Water: Development and Validation", Chemosphere, 23, 511-531, 1994.

  • Di Guardo, A.,Williams, R.J.,Mattiessen, P., Brooke, D.N., and Calamari, D. " Simulation of Pesticide Runoff at Rosemaund Farm (UK) Using the SoilFug Model", Environ. Sci. & Pollut. Res. 1, 151-160, 1994.

  • Barra, R., Vighi M., and Di Guardo, A. "Prediction of Surface Water Input of Chloridazon and Chlorpyrifos from an Agricultural Watershed in Chile", Chemosphere, 30, 485-500, 1995.
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    For a simpler, non-Windows version, use the Soil model.

    The required input data are:
    Chemical Properties:

  • chemical name
  • molecular mass
  • water solubility
  • vapour pressure
  • organic carbon partition coefficient, Koc, OR
    the log octanol-water partition coefficient, log Kow
  • mineral-water partition coefficient
  • degradation half-life

    • Dosage:

  • times, durations, and deposition depths of up to 20 rain events
  • individual time, dosage of, and area covered by up to ten pesticide applications

    • Soil Properties:

  • basin area
  • soil depth
  • diffusive depth
  • region temperature
  • volume fractions of air and water
  • mass fraction of organic carbon

    • Model output includes:

  • D values
  • system fugacity
  • concentrations of pesticide in the soil and in the basin water
  • pesticide losses by each of runoff, degradation, and volatilization over the 20 rain events

    • This program is only available in compiled form. To run this program you will need a computer running either MS Windows 3.1 or Windows 95. The zipped file is 986KB and is self-expanding to about 2.26 MB. A "setup.txt" file with more detailed technical information is included in the zipped file.

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    Last updated August 12, 2011.