Pesticide application to a rice paddy is a unique pesticide exposure scenario not fully addressed by previous regulatory aquatic exposure conceptual models. The goal of the conceptual model is to characterize concentrations of pesticide residue in the rice paddy and in water bodies receiving the released rice paddy water. In developing the conceptual model for use with EPA's Pesticides in Flooded Agriculture Model (PFAM), the following topics are considered: 1) agronomic practices associated with rice; 2) hydrology of rice growing regions; 3) locations of ecological receptors and human health drinking water intakes relative to locations of rice paddies; and 4) exposure durations of concern for ecological and human health assessment. Applications of the conceptual model beyond rice paddies are also considered (e.g., cranberry bogs).

Conceptual model for estimating exposure from the use of pesticides on rice

246th National Meeting (2013)

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