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Development and application of a catchment scale pesticide fate and transport model for use in drinking water risk assessment

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journal contribution
posted on 13.09.2016, 08:34 by S. P. Pullan, Michael J. Whelan, J. Rettino, K. Filby, S. Eyre, I. P. Holman
This paper describes the development and application of IMPT (Integrated Model for Pesticide Transport), a parameter-efficient tool for predicting diffuse-source pesticide concentrations in surface waters used for drinking water supply. The model was applied to a small UK headwater catchment with high frequency (8h) pesticide monitoring data and to five larger catchments (479-1653km(2)) with sampling approximately every 14days. Model performance was good for predictions of both flow (Nash Sutcliffe Efficiency generally >0.59 and PBIAS <10%) and pesticide concentrations, although low sampling frequency in the larger catchments is likely to mask the true episodic nature of exposure. The computational efficiency of the model, along with the fact that most of its parameters can be derived from existing national soil property data mean that it can be used to rapidly predict pesticide exposure in multiple surface water resources to support operational and strategic risk assessments.

History

Citation

Science of The Total Environment, 2016, 563-564, pp. 434-447

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Geography/Physical Geography

Version

VoR (Version of Record)

Published in

Science of The Total Environment

Publisher

Elsevier

issn

0048-9697

eissn

1879-1026

Acceptance date

17/04/2016

Copyright date

2016

Available date

13/09/2016

Publisher version

http://www.sciencedirect.com/science/article/pii/S0048969716308282

Language

en