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GONTRAN F. BAGE RÉJEAN SAMSON BERNARD SINCLAIR-DESGAGNÉ 《Environmental management》2002,30(6):0807-0815
A technicoeconomic model is developed to select an optimal strategy for the remediation of a contaminated site and to determine
the value of this remediation strategy. The model is an extension of actual cost–benefit analysis, with consideration of “irreversible”
remediation technology choices, technology effectiveness, and uncertainty on the site's level of contamination. The model
considers the possibility of reducing uncertainty by both acquiring more and better information on the level of contamination
and by offering the decision-maker the opportunity to reevaluate his decision and switch to a more appropriate technology.
It is believed that this model will help decision-makers in the selection of a remediation strategy by presenting all potentially
feasible strategies, and how uncertainty on the site's level of contamination affects these strategies. 相似文献
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BAGE GONTRAN F. SAMSON RÉJEAN SINCLAIR-DESGAGNÉ BERNARD 《Environmental management》2003,31(1):0069-0078
Different tools, such as a screening matrix or decision framework, are available to select a remediation technology to treat
a contaminated site. However, unless these methods can point out the appropriate technology in regards to the decision-maker's
knowledge about the contaminated site, they are less useful to evaluate both the technical effectiveness and the cost of the
remediation, and to assess different remediation strategies from either future data acquisition or the use of an irreversible
remediation technology. A model developed to allow such evaluations has been used to simulate the remediation of a virtual
contaminated site. From this, four remediation recommendations have been made. These recommendations are guidelines for the
build up of a remediation strategy that would both maximize the effectiveness of the decontamination and minimize its total
cost. 相似文献
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Species Extinction in the Marine Environment: Tasmania as a Regional Example of Overlooked Losses in Biodiversity 总被引:2,自引:0,他引:2
Abstract: We used Tasmania as a case example to question the consensus that few marine species have recently become extinct or are approaching extinction. Threats to marine and estuarine species—primarily in the form of climate change, invasive species, fishing, and catchment discharges—are accelerating, fully encompass species ranges, and are of sufficient magnitude to cause extinction. Our ignorance of declining biodiversity in the marine environment largely results from an almost complete lack of systematic broad-scale sampling and an overreliance on physicochemical data to monitor environmental trends. Population declines for marine species approaching extinction will generally go unnoticed because of the hidden nature of their environment and lack of quantitative data. 相似文献
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