Weight-of-Evidence (WOE): Quantitative Estimation of Probability of Impairment for Individual and Multiple Lines of Evidence

نویسنده

  • Eric P. Smith
چکیده

Environmental decision-making is con~plex and often based on multiple lines of evidence. Integrating the infornlation from these multiple lines of evidence is rarely asinlplc process. We present aquantitative approach to the combination of multiple lines of evidence through calculation of weight-of-evidence, with reference conditions used to define a not impaired state. The approach is risk-based with measure. . ment of risk computed as the probability of impairment. When data on reference conditions are available, there are a variety of methods for calculating this probabilitv. Statistical theorv and the use of odds ratios orovide a method for combinine the '2 measures of risk from the different lines of evidence. The approach is illustrated using data from the Great Lakes to predict the risk at potentially contaminated sites.

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تاریخ انتشار 2006