A spatially distributed assessment for pesticide exposure in surface waters via drainflow

C D Brown, I G Dubus, C Gustin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

There is no consensus on the approach to estimating exposure at higher tiers of environmental assessment. Step 1 calculations conducted for a novel herbicide did not exclude the potential for the compound to exhibit effects on higher aquatic plants following transport in drainflow. In a higher tier approach, a model was first validated against field data and then used for distributed modelling for 15 environmental scenarios with 30-year simulations for each. Predicted concentrations of the herbicide for the 15 scenarios were weighted according to their relative abundance within wheat-growing areas. The resulting 450 model outputs were ranked to assess risk and the probability of impact at the national scale.

Original languageEnglish
Title of host publicationPESTICIDE BEHAVIOUR IN SOILS AND WATER
Subtitle of host publicationProceedings of an International Symposium Held in Brighton, UK on 13-15 November 2001
EditorsA Walker
Place of PublicationFARNHAM
PublisherBRITISH CROP PROTECTION COUNCIL
Pages265-270
Number of pages6
ISBN (Print)1-901396-78-9
Publication statusPublished - 2001

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