DEPARTMENT OF ENVIRONMENTAL SCIENCE

FACULTY OF SCIENCE

Mark Huijbregts and Aafke Schipper

Environmental Sciences

Radboud University Nijmegen

Environmental Sciences

Introduction

Mark Huijbregts

• Assistent Professor, Department Environmental Science, Radboud University, Nijmegen

• Field of Expertsise: Risk Assessment of chemicals and Life Cycle Assessment of products

Aafke Schipper

• Postdoc, Department Environmental Science, Radboud University, Nijmegen

• Field of Expertise: Multistress assessment in river ecosystems

Radboud University Nijmegen

Environmental Sciences

Human and Environmental Risk Assessment (HERA): Substances

Staff Dr. Ad Ragas, Dr. Mark Huijbregts

Prof. Dik v.d. Meent/Ton Breure (RIVM),

Prof. Jan Hendriks

Aim Environmental risk management

Topics risk assessment, uncertainty analysis

critical body burdens, valuation

CO2, CH4, N, PCB, Cd, H+ …

Radboud University Nijmegen

Environmental Sciences

Nature and Water Management (NWM): Rivers and Estuaries

Staff Dr. Rob Leuven, Dr. Rob Lenders

Dr. Marieke van Katwijk, Prof. Peter

Herman (NIOO), Prof. Jan Hendriks

Aim Integrated river-coastal management

Topics Development and restoration, rivers-

estuaries, multi-stress, sea grass

meadows, eco-engineering, bio-invasions

Radboud University Nijmegen

Environmental Sciences

Uncertainty in a risk assessment framework

1. Expertise RU

- EUTGD spreadsheet, Simplebox

- Monte Carlo simulation1-4

- Comparison with field data5-8

- Uncertainty versus variability2,9

2. Contribution RU

- Assessment of uncertainty in environmental risk outcomes due to uncertainties in the new QSAR regression equations

- Identifying dominant sources of uncertainties in the probabilistic analysis

- Comparison with field data?

References

1. Roelofs et al. 2003. ETC 22 (6): 1387-1393. 2. Hauck et al. Chemosphere 72 (6): 959-967. 3. Harbers et al. 2006. EST 40 (5): 1573-1580. 4. Henning-de Jong et al. 2008. ETC 27 (3):737-745. 5. Smitkova et al. 2005. SAR QSAR Research 16 (5): 483–493. 6. Hauck et al. 2007. EST 41 (8): 2738-2744. 7 Hendriks et al. 2007. Chemosphere 70 (1): 46-56. 8. De Vos et al. 2008. Chemosphere 70 (10): 1766-1773. 9. Ragas et al. 2009. IEAM 5 (1): 27–37.

Radboud University Nijmegen

Environmental Sciences

% variance in arthropod distributions explained by different environmental characteristics

Contamination

Hydrodynamics

Soil characteristics

Vegetation

Shared variation

Unexplained variation

1. Expertise RU

- Mechanistic population/ecosystem models1-3

- Multivariate statistical analysis4

- Valuation from the life cycle assessment of products

2. Contribution RU

- Quantifying effects of toxicants on ecosystem services

- mechanistic versus statistical

- various geographical scales

- comparison with other stressors

- Value of the ecosystem services affected

- Application to the chemical classes included in CADASTER

References

1. Breure et al. 2008. Science of the Total Environment 406 (3): 530-536. 2. Hendriks, 2007. Ecological Modelling 2007; 205: 196-208. 3 Hendriks and Enserink, 1996. Ecological Modelling 88 (1-3): 247-262. 4. Schipper et al. 2008. Environmental Pollution 151: 17-26.

Valuation of substitution of chemicals