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        p-EMA (I): simulating the environmental fate of pesticides for a farm-level risk assessment system

        Author
        Brown, C.D.
        Hart, A.
        Lewis, Kathleen
        Dubus, I.
        Attention
        2299/7874
        Abstract
        A computer-based decision support tool (p-EMA) has been developed to support UK Government policy of optimising agricultural pesticide use. The system estimates risks to a wide range of taxonomic groups and environmental compartments using methods consistent with current regulatory assessments, but also allows adjustments to reflect formulation, the local conditions and the environmental costs and benefits of varying management practices. Simple models of the dispersion pathways of the pesticide in the local environment are used to estimate predicted environmental concentrations in the field and margin soil, surface water and groundwater. Exposure estimates are then combined with the toxicological properties of the pesticide in the form of toxicity:exposure ratios. Concentrations in groundwater are calculated on the basis of a meta-version of the MACRO model linked to environmental and pesticide databases. Surface water concentrations are taken as the maximum of those arising from inputs via spray drift and drainflow.
        Publication date
        2003
        Published in
        Agronomie
        Published version
        https://doi.org/10.1051/agro:2002074
        Other links
        http://hdl.handle.net/2299/7874
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