Using spectrocolourimetry to trace sediment source dynamics in coastal catchments draining the main Fukushima radioactive pollution plume (2011–2017)
Using spectrocolourimetry to trace sediment source dynamics in coastal catchments draining the main Fukushima radioactive pollution plume (2011–2017)
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使用分光比色法追踪排放福岛主要放射性污染羽流的沿海集水区的沉积物源动态（2011-2017）
DOI：
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发表时间：
2019
影响因子：
3.6
通讯作者：
J. Laceby
中科院分区：
文献类型：
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作者：
O. Evrard;Roxanne Durand;A. Foucher;T. Tiecher;Virginie Sellier;Y. Onda;I. Lefèvre;O. Cerdan;J. Laceby
目的光谱比色测量为地球化学和有机质性质的分析提供了一种相对廉价、快速和非破坏性的替代方法。当用于分析沉积物及其潜在来源时，这些颜色参数可提供有关临界区发生的主要过程(即侵蚀)的重要信息。材料和方法15种光谱特性(L*，a*，b*，C*，h，x，y，z，L，a*，b*，u‘，在两个流域(总表面积为450km2)发生重大洪水事件后，从2011年至2017年的13次活动中收集的潜在源(n = 37)和沉积物(n = 400)样本中测量了V‘)，这些样本排出了福岛第一核电站的主要放射性污染羽流。潜在的来源包括来自森林和耕作来源的表土，以及来自山体滑坡、河堤和耕作地区净化的下层土壤物质。通过极差检验、Kruskal-Wallis H检验和线性判别分析，得到了混合线性模型中用于计算泥沙来源贡献的最佳参数集。结果和讨论所选择的9个颜色参数正确地分类了100%的来源样本(即森林、底土和耕作来源)。结果表明，耕地景观是这些水系的主要泥沙来源(平均56%，SD 34%)，其次是下层土壤(平均26%，SD 16%)和森林来源(平均21%，SD 24%)。然而，这些贡献随着时间的推移而变化很大，地基贡献的峰值(平均57%，SD 17%)在2015年秋季，恰逢修复工程后台风的发生。这些结果与在同一地区进行的监测研究相一致，这些研究表明2015年9月台风Etau对沉积物和放射性铯通量的主要影响。结论这些原始结果表明，光谱比色测量可能有助于在这一事故发生后的情况下对修复工作的有效性进行常规监测。由于廉价、快速和非破坏性的分析，基于光谱比色的示踪方法在提供关于临界区发生的主要侵蚀过程的信息方面具有很大潜力。
PurposeSpectrocolourimetric measurements provide a relatively inexpensive, quick and non-destructive alternative to the analysis of geochemical and organic matter properties. When used in the analysis of sediments and their potential sources, these colour parameters may provide important information on the dominant processes (i.e. erosion) occurring in the Critical Zone. Here, they are used to investigate whether eroded sediment is derived from forest (i.e. natural), cultivated (i.e. anthropogenic) or subsoil sources in order to assess their potential to monitor the effect of decontamination in regions impacted by fallout from the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident.Materials and methodsFifteen spectrocolourimetric properties (L*, a*, b*, C*, h, x, y, z, L, a, b, u*, v*, u’, v’) were measured in potential source (n = 37) and sediment (n = 400) samples collected during 13 campaigns from 2011 to 2017 after major flood events in two catchments (total surface area of 450 km2) draining the main FDNPP radioactive pollution plume. Potential sources included topsoil from forest and cultivated sources along with subsoil material originating from landslides, channel banks and the decontamination of cultivated areas. The optimum set of parameters used in the mixed linear model to calculate the sediment source contributions was obtained through the use of a range test, the Kruskal–Wallis H test and a linear discriminant analysis.Results and discussionNine selected colour parameters correctly classified 100% of the source samples (i.e. forest, subsoil and cultivated sources). The results illustrate that cultivated landscapes were the main source of sediment to these river systems (mean 56%, SD 34%) followed by subsoil (mean 26%, SD 16%) and forest sources (mean 21%, SD 24%). However, these contributions varied strongly over time, with a peak of subsoil contributions (mean 57%, SD 17%) in Fall 2015, coinciding with the occurrence of a typhoon after the remediation works. These results were consistent with monitoring studies conducted in the same area that showed the major impact of typhoon Etau in September 2015 on sediment and radiocaesium fluxes.ConclusionsThese original results demonstrate that spectrocolourimetric measurements may contribute to the routine monitoring of the effectiveness of remediation works in this post-accidental context. Owing to the inexpensive, rapid and non-destructive analyses, spectrocolourimetric-based tracing methods have significant potential to provide information on the dominant erosion processes occurring in the Critical Zone.
光谱指纹识别：利用 VNIR-SWIR 光谱信息表征悬浮沉积物来源
影响因子：
3.6
作者：
A. Brosinsky;S. Foerster;K. Segl;J. A. López-Tarazón;G. Piqué;A. Bronstert
通讯作者：
A. Bronstert