Comparison of the long-term risks of removal and in situ management of contaminated sediments in the Fox River
Comparison of the long-term risks of removal and in situ management of contaminated sediments in the Fox River
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DOI：
10.1080/713610975
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发表时间：
2003-01-01
影响因子：
2
通讯作者：
Teal, J
中科院分区：
文献类型：
--
作者：
Reible, D;Hayes, D;Teal, J
环境疏浚与原位污染沉积物管理实践的长期潜在风险进行了讨论和比较，为下福克斯河，威斯康星州。风险被确定为主要与残留沉积物污染与任何一种方法。建议将表层沉积物中污染物浓度的表面积加权平均值的积分作为比较这些风险的度量。封顶显示出显着降低暴露和风险相对于疏浚方案，即使潜在的未检测到的侵蚀的5%的上限被认为是。即使有25%的盖帽未被发现的故障的不太可能的事件，与盖帽相关的暴露和风险大约等于或低于所有疏浚方案。由于认为疏浚可以消除原位封盖的长期风险而倾向于疏浚，这一分析并不支持。虽然严格适用于福克斯河下游，结果表明，必须进行特定地点的分析，以确定哪些沉积物管理方法最大限度地减少长期暴露和风险的可能性。
The long-term potential risks of environmental dredging vs. in situ contaminated sediment management practices are discussed and compared for the Lower Fox River, Wisconsin. The risks are identified as being largely associated with the residual sediment contamination associated with either approach. The integral of the surface area-weighted average contaminant concentration in surface sediment is proposed as a metric to compare these risks. Capping is shown to exhibit significantly reduced exposure and risk relative to the dredging scenarios, even if potential undetected erosion of 5% of the cap is considered. Even with the improbable event of undetected failure of 25% of the cap, the exposure and risk associated with capping is approximately equal to or below all dredging scenarios. A preference for dredging due to the perception that it eliminates the long-term risk of in situ capping is not supported by this analysis. Although strictly applicable only to the Lower Fox River, the results suggest site-specific analyses must be conducted to determine which sediment management approaches minimize the potential for long-term exposure and risk.