The atmospheric transport of pesticides to non-target areas is attributed to various processes including spray drift and post-application volatilization. In this study, volatilization flux from multiple pesticides was evaluated with Woodrow empirical model and two deterministic models, namely Pesticide Root Zone Model (PRZM) and Pesticide Emissions Model (PEM). Results from PEM and PRZM, which consider application rates and atmospheric dynamics driving pesticide transport within the soil profile, were compared against Woodrow empirical model which provides correlations with physiochemical properties only. The three emission flux models were then coupled with AERMOD, an atmospheric dispersion model, to simulate downwind ambient concentrations.

Volatilization and atmospheric transport of pesticides: Comparison of three flux models

248th National Meeting (2014)

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