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ECN publication
Modelling fluxes and bioavailability of radiocaesium and radiostrontium in freshwaters (Mid-term report ECOPRAQ project)
Published by: Publication date:
ECN 1-3-1998
ECN report number: Document type:
ECN-C--98-024 ECN publication
Number of pages: Full text:
63 Download PDF  

The acronym of this project, ECOPRAQ, stands for ECOlogical PROcesses inAQuatic systems, and refers, together with the full title of the project, to our process- or mechanistically-based approach to modelling the fluxes and the availability of radionuclides to the biosphere in the aquatic environment. The global objectives of the project are the development of mechanistic and generally applicable whole-ecosystem models. Because of their mechanistic basis, these models are intended to enable the advancement of a sound theoretical basis for chemical and hydrological counter-measures. The emphasis of the project is on radiocesium. The work is broken down into six 'work packages' which focus at: (1) Development of mechanistic submodels for the solid/liquid partitioning and (bio)availability of particle-bound radiocesium and radiostrontium; (2) Development of mechanistic submodels for the accumulation and elimination of radiocesium and radiostrontium by aquatic biota; (3) Development and assessment of chemical and/or hydrological countermeasures; (4) Development of mechanistically-based whole-ecosystem models; (5) Model validation of sediment-water exchange and bioavailability of radionuclides in a large-scale controlled laboratory setup and in situ; and (6) Model validation of radionuclide scavenging by suspended particles and uptake by aquatic plants. 43 refs.

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