Institute of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, UK,
Environ Sci Pollut Res Int. 2014;21(11):6952-63. doi: 10.1007/s11356-013-2170-3. Epub 2013 Oct 3.
Local remediation measures, particularly those undertaken in historical mining areas, can often be ineffective or even deleterious because erosion and sedimentation processes operate at spatial scales beyond those typically used in point-source remediation. Based on realistic simulations of a hybrid landscape evolution model combined with stochastic rainfall generation, we demonstrate that similar remediation strategies may result in differing effects across three contrasting European catchments depending on their topographic and hydrologic regimes. Based on these results, we propose a conceptual model of catchment-scale remediation effectiveness based on three basic catchment characteristics: the degree of contaminant source coupling, the ratio of contaminated to non-contaminated sediment delivery, and the frequency of sediment transport events.
局部整治措施，特别是在历史采矿业地区采取的措施，往往效果不佳甚至适得其反，因为侵蚀和沉积过程的作用空间尺度超出了点源整治通常采用的尺度。基于混合景观演化模型与随机降雨生成的实际模拟，我们证明，在考虑三个具有不同地形和水文条件的欧洲流域时，类似的整治策略可能会产生不同的效果。基于这些结果，我们提出了一个基于三个基本流域特征的流域尺度整治效果的概念模型：污染物源耦合程度、污染与非污染泥沙输送比以及泥沙输送事件频率。
