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首页> 外文会议>Sixth International Conference on Environmental Issues and Management of Waste in Energy and Mineral Production Swemp 2000, May 30-Jun 2, 2000, Calgary, Alberta >The influence of fluvial geomorphology and particle size on health risk
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The influence of fluvial geomorphology and particle size on health risk

机译：河流地貌和粒径对健康风险的影响

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摘要

Risk assessments involving contaminated sediments sometimes neglect the influence that geo-morphological processes may have on the spatial distribution of contamination. In the arid southwest of the United States, sediment particles in ephemeral stream systems are sorted by water flow into a mosaic of distinct geomorphological features, often with different characteristic particle size fractions. Contaminant concentrations, as well as intake via a variety of exposure pathways, may be correlated with particle size. In a recent investigation of a stream system impacted by mining operations, a sampling design based on fluvial geomorphology was used to collect data for risk assessment purposes. Chemical concentration data for different particle size fractions were obtained within geomorphological features over several miles of an ephemeral stream. Several exposure pathways were employed to evaluate the potential significance of particle size and geomorphological sorting on risk estimates.
机译：涉及受污染的沉积物的风险评估有时会忽略地貌过程可能对污染空间分布的影响。在美国西南干旱地区，短暂水流系统中的沉积物颗粒通过水流被分类成具有不同地貌特征的马赛克，通常具有不同的特征粒径分数。污染物浓度以及通过各种暴露途径的摄入可能与粒径有关。在最近对受采矿作业影响的河流系统的调查中，基于河流地貌的抽样设计用于收集数据以进行风险评估。在短暂的几英里远的地貌特征内获得了不同粒径分数的化学浓度数据。几种暴露途径被用来评估粒度和地貌分类对风险估计的潜在意义。

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