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Progress of Ecological Risk Assessment Methodology and Choice of Assessment Models
Pages: 17-21
Year: Issue:  1
Journal: Urban Environment & Urban Ecology

Keyword:  ecological risk assessmentassessment methodologyassessment model;
Abstract: The content, methodologies, progress and models of Ecological Risk Assessment(ERA) were examined in this study. The attention was focused on the methods and models adopted in the procedures of hazard identification,exposure assessment, effect assessment and risk characterization in the ERA process. The choice of models was based on requirement, available data and difficulties in practical use, and then three models were subsequently compared.By the comparison among models of Hazard Quotient(HQ), Species Sensitive Distributions(SSDs) and Probabilities Ecological Risk Assessment(PERA), the conclusion showed that the PERA method presented the assessment result in a probability value instead of an absolute value. So the PERA model made the assessment more realistic, but it had higher requirements on data and expertise. The actual ERA cases should be based on sufficient investigation and take the economic technologies into consideration. When foreign models are adopted, amendment and verification are necessary according to the real situation. Besides, the effect of uncertainties needs to be taken into consideration.
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