Risks from Historical Contaminated Sediments in the Rhine Basin
2006
Heise, Susanne | Förstner, Ulrich
The holistic river basin approach of the European Water Framework Directive (WFD) requires the combined assessment of ecological risks and the development of remediation measures. This paper presents a three-step strategy for the assessment of risks on Rotterdam harbour arising from historical contaminated sediment in the Rhine river basin, by the identification of (1) substances of concern, (2) areas of concern and (3) areas of risk with regard to the probability of polluting the sediments in the downstream reaches. The pragmatic approach provides initial evidence, that sediment-associated hexachlorobenzene (HCB) from the Higher and Upper Rhine has a significant effect on the quality of dredged material from Rotterdam harbour and that this HCB contamination is a candidate for the Category 1 of WFD Article 16 Source/Pathway S.11.1 'Historical Pollution from Sediments': This HCB source can contribute to a failure of the objectives of the WFD in the Rhine Basin and may require additional measures for its control.
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