Volume 22, Issue 9
Hazard/Risk Assessment

Limitations of current risk characterization methods in probabilistic environmental risk assessment

Frederik A. M. Verdonck

Corresponding Author

E-mail address: frederik.verdonck@biomath.rug.ac.be

Ghent University, Department of Applied Mathematics, Biometrics and Process Control, Coupure Links 653, B‐9000 Gent, Belgium

Ghent University, Department of Applied Mathematics, Biometrics and Process Control, Coupure Links 653, B‐9000 Gent, BelgiumSearch for more papers by this author
Tom Aldenberg

RIVM, Antonie van Leeuwenhoeklaan 9, P.O. Box 1, NL‐3720 BA Bilthoven, The Netherlands

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Joanna Jaworska

Procter&Gamble, ETC, Temselaan 100, B‐1853 Strombeek‐Bever, Belgium

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Peter A. Vanrolleghem

Ghent University, Department of Applied Mathematics, Biometrics and Process Control, Coupure Links 653, B‐9000 Gent, Belgium

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First published: 05 November 2009
Citations: 23

Abstract

In probabilistic environmental risk assessment, the likelihood and the extent of adverse effects occurring in ecological systems because of exposure(s) to substances are estimated. It is based on the comparison of an exposure/environmental concentration distribution, with a species sensitivity distribution derived from toxicity data. The calculation of a probabilistic risk can be performed in many ways (e.g., area under the curve in joint probability curves). However, several (hypothetical) examples and some theoretical considerations illustrate that the current risk characterisation methods have an integrative character and they focus on the statistical comparison of two distributions without properly considering the environmental interpretation of these underlying distributions. Several scenarios with varying exposure/environmental concentration distribution and species sensitivity distribution standard deviations are discussed.

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