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Temporal and spatial prediction of radiocaesium transfer to food products

Gillett, A.G.; Crout, N.M.J.; Absalom, J.P.; Wright, S.M.; Young, S.D.; Howard, B.J.; Barnett, C.L.; McGrath, S.P.; Beresford, N.A.; Voigt, G.. 2001 Temporal and spatial prediction of radiocaesium transfer to food products. Radiation and Environmental Biophysics, 40 (3). 227-235. 10.1007/s004110100107

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Abstract/Summary

A recently developed semi-mechanistic temporal model to is used predict food product radiocaesium activity concentrations using soil characteristics available from spatial soil databases (exchangeable K, pH, % clay and % organic matter content). A raster database of soil characteristics, radiocaesium deposition, and crop production data has been developed for England and Wales and used to predict the spatial and temporal pattern of food product radiocaesium activity concentrations (Bq kg-1). By combining these predictions with spatial data for agricultural production, an area's output of radiocaesium can also be estimated, we term this flux (Bq y-1 unit area-1). Model predictions have been compared to observed data for radiocaesium contamination of cow milk in regions of England and Wales which received relatively high levels of fallout from the 1986 Chernobyl accident (Gwynedd and Cumbria). The model accounts for 56 and 80% of the observed variation in cow milk activity concentration for Gwynedd and Cumbria respectively. Illustrative spatial results are presented and suggest that in terms of food product contamination areas in the north and west of England and Wales are those most vulnerable to radiocaesium deposition. When vulnerability is assessed using flux the spatial pattern is more complex and depends upon food product.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1007/s004110100107
Programmes: CEH Programmes pre-2009 publications > Other
CEH Sections: _ Environmental Chemistry & Pollution
ISSN: 0301-634X
Additional Information. Not used in RCUK Gateway to Research.: The original publication is available at www.springerlink.com
Additional Keywords: radioecology, radiocaesium, temporal, spatial, modelling, vulnerable areas, Chernobyl, radiological assessment
NORA Subject Terms: Ecology and Environment
Date made live: 03 May 2012 10:32
URI: http://nora.nerc.ac.uk/id/eprint/17750

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