Uncertainties in doses from agricultural ecosystems following conversion from wetlands
2013 (English)In: 14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal, 2013, 1024-1031 p.Conference paper (Refereed)
Agricultural ecosystems dominate human exposure to environmental concentrations of radionuclides following release from geologic disposal facilities. Although natural ecosystems have received considerable attention in the past decade their low productivity requires large areas of land to meet dietary requirements leading to a high a high spatial dilution when uncontaminated food sources are included. Additionally, long accumulation times may be anticipated. Accumulation in natural ecosystems followed by exposure in agricultural ecosystems is of interest. The transition period can be short, with residual activity inventories remaining unchanged. Doses in the agricultural system therefore begin with relatively high initial radionuclide concentrations in the soil column. Timescales for subsequent leaching are determined by the retention characteristics of the soils and ecosystem. There is a question of reliability of the models used in this context because of the rapid transition. This paper describes a sensitivity analysis carried out using an advanced 10-layer soil model of the upper one metre of an agricultural soil underlain by a simple geosphere-biosphere interface. As well as soil chemistry and hydrology, results here emphasise the importance of the representation of the soil-plant interaction. The mechanics of the transition between natural and managed ecosystems are also shown to be important.
Place, publisher, year, edition, pages
2013. 1024-1031 p.
Agricultural ecosystems, Agricultural soils, Agricultural system, Environmental concentration, Radionuclide concentration, Rapid transitions, Retention characteristics, Transition period, Agriculture, Radioactive waste disposal, Radioactive wastes, Radioisotopes, Soils, Waste disposal, Ecosystems
IdentifiersURN: urn:nbn:se:kth:diva-140017ScopusID: 2-s2.0-84886879715ISBN: 9781627486446OAI: oai:DiVA.org:kth-140017DiVA: diva2:690035
14th International High-Level Radioactive Waste Management Conference: Integrating Storage, Transportation, and Disposal, IHLRWMC 2013; Albuquerque, NM; United States; 28 April 2013 through 2 May 2013
QC 201401222014-01-222014-01-162014-01-22Bibliographically approved