University of Tehran/Springer International Journal of Environmental Research 1735-6865 8 4 2014 10 01 Ecological Risk Assessment for the Terrestrial Ecosystem under Chronic Radioactive Pollution 961 970 788 10.22059/ijer.2014.788 EN G.V. Lavrentyeva Obninsk Institute for Nuclear Power Engineering, branch of the National Research Nuclear University MEPhI, Department of Ecology, Studgorodok,1, 249040 Obninsk, Kaluga region, Russian Federation O.A. Mirzeabasov Obninsk Institute for Nuclear Power Engineering, branch of the National Research Nuclear University MEPhI, Department of Ecology, Studgorodok,1, 249040 Obninsk, Kaluga region, Russian Federation B.L. Synzynys Obninsk Institute for Nuclear Power Engineering, branch of the National Research Nuclear University MEPhI, Department of Ecology, Studgorodok,1, 249040 Obninsk, Kaluga region, Russian Federation Journal Article 2014 10 10 A methodology of ecological risk assessment for the terrestrial ecosystem under chronic<br />radioactive pollution of a biotope near a regional radioactive waste storage has been developed in terms of the<br />critical environmental loads analyzed. It consists of five stages: determination of effect indicators and assessment<br />of their values; establishment of reference species and indices; assessment and analysis of critical loads by<br />plotting “dose-effect” dependencies; ecological risk assessment from critical loads versus permissible values;<br />plotting of risk functions to calculate the expected adverse alterations in the ecosystem. Based on the results<br />obtained the storage risk for a terrestrial ecosystem is considered to be inadmissible and this implies unstable<br />conditions in the territory in the nearest future. The calculations and mapping have shown that in the territory<br />studied the area with excess critical loads is 48% for CFU and 61% for 90Sr accumulation coefficient. The<br />analyzed risk functions give evidence of highly probable negative alterations in the tested ecosystem: 85% for<br />CFU and 99% for 90Sr accumulation coefficient. https://ijer.ut.ac.ir/article_788_5606c68c27f606e727c8e7eff30c406b.pdf