ecological risk assessment for the terrestrial ecosystem under chronic radioactive pollution
نویسندگان
چکیده
a methodology of ecological risk assessment for the terrestrial ecosystem under chronicradioactive pollution of a biotope near a regional radioactive waste storage has been developed in terms of thecritical environmental loads analyzed. it consists of five stages: determination of effect indicators and assessmentof their values; establishment of reference species and indices; assessment and analysis of critical loads byplotting “dose-effect” dependencies; ecological risk assessment from critical loads versus permissible values;plotting of risk functions to calculate the expected adverse alterations in the ecosystem. based on the resultsobtained the storage risk for a terrestrial ecosystem is considered to be inadmissible and this implies unstableconditions in the territory in the nearest future. the calculations and mapping have shown that in the territorystudied the area with excess critical loads is 48% for cfu and 61% for 90sr accumulation coefficient. theanalyzed risk functions give evidence of highly probable negative alterations in the tested ecosystem: 85% forcfu and 99% for 90sr accumulation coefficient.
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عنوان ژورنال:
international journal of environmental researchناشر: university of tehran
ISSN 1735-6865
دوره 8
شماره 4 2014
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