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Main Title Evaluation of SESOIL (Seasonal Soil Compartment Model), PRZM (Pesticide Root Zone Model), and PESTAN (Pesticide Analytical Model) in a Laboratory Column Leaching Experiment.
Author Melancon, S. M. ; Pollard, J. E. ; Hern, S. C. ;
CORP Author Environmental Monitoring Systems Lab., Las Vegas, NV. ;Nevada Univ., Las Vegas.
Year Published 1986
Report Number EPA/600/J-86/268;
Stock Number PB87-167169
Additional Subjects Leaching ; Pesticides ; Soil analysis ; Chemical composition ; Organic compounds ; Chlorobenzenes ; Evaluation ; Model tests ; Dicamba ; Dichlorophenoxyacetic acid ; Atrazine ; Diazinon ; Pentachlorophenol
Library Call Number Additional Info Location Last
NTIS  PB87-167169 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 16p
Four 2-m columns filled with sandy soil were loaded with six organic chemicals (dicamba, 2,4-dichlorophenoxyacetic acid, atrazine, diazinon, pentachlorophenol, and lindane) and watered for 30 days in a controlled laboratory experiment. Chemical migration was monitored by analyses of daily effluent samples and soil sample cores, the latter collected on day 30 from 5-cm compartments throughout each column. Observed chemical migration patterns were compared with the predictions of three vadose zone fate-and-transport models: SESOIL, PRZM and PESTAN. Evaluations of model performance revealed substantial variability depending on the chemical type and model tested. PRZM and PESTAN showed greater improvement in prediction of observed chemical migration patterns with the use of measured input data than did SESOIL. The limitations of these models, if used for screening purposes without a priori measurement of chemical- and site-specific model input data or post hoc calibration with existing field data, should be recognized. (Copyright (c) SETAC 1986.)