Flood-related contamination in catchments affected by historical metal mining: An unexpected and emerging hazard of climate change
Flood-related contamination in catchments affected by historical metal mining: An unexpected and emerging hazard of climate change
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DOI：
10.1016/j.scitotenv.2013.12.079
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发表时间：
2014-04-01
影响因子：
9.8
通讯作者：
Rassner, S. M. E.
中科院分区：
文献类型：
--
作者：
Foulds, S. A.;Brewer, P. A.;Rassner, S. M. E.
受历史金属开采影响的集水区的洪水导致洪泛平原土壤和旧矿井中大量受污染沉积物的重新流动。这对农业生产构成了重大威胁，并阻碍了许多欧洲河流集水区达到水框架指令所要求的“良好的化学和生态状态”。2012年6月威尔士西部大范围洪水后对漫滩沉积物的分析表明，洪水沉积物的污染超过了指导方针的污染阈值，在一些样本中达到了82倍。最重要的是，从受洪水影响的领域生产的青贮饲料被发现含有高达1900毫克公斤（-1）的沉积物相关的铅，这导致牛中毒和死亡。由于与气候有关的洪水增加，这一问题可能会继续下去并加剧。受污染集水区的管理需要采用地貌学方法，以了解金属在河流系统中的时空循环。(c)2013爱思唯尔有限公司版权所有。
Floods in catchments affected by historical metal mining result in the remobilisation of large quantities of contaminated sediment from floodplain soils and old mine workings. This poses a significant threat to agricultural production and is preventing many European river catchments achieving a 'good chemical and ecological status', as demanded by the Water Framework Directive. Analysis of overbank sediment following widespread flooding in west Wales in June 2012 showed that flood sediments were contaminated above guideline pollution thresholds, in some samples by a factor of 82. Most significantly, silage produced from flood affected fields was found to contain up to 1900 mg kg(-1) of sediment associated Pb, which caused cattle poisoning and mortality. As a consequence of climate related increases in flooding this problem is likely to continue and intensify. Management of contaminated catchments requires a geomorphological approach to understand the spatial and temporal cycling of metals through the fluvial system. (c) 2013 Elsevier B.V. All rights reserved.