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Evaluation of two sediment tracers under simulated rainfall

机译:模拟降雨条件下两种沉积物示踪剂的评价

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A number of different tracing approaches have already been established, including the use of rare earth oxides or environmental radionuclides. However, since existing techniques face various limitations, the search for alternative procedures continues. Two alternative tracing approaches involve the use of organo-philic clays and magnetic iron oxides. This study performed a combined test of these tracers to assess potential contrasts in their behaviour under a controlled rainfall simulation experiment. The experiment consisted of a simulated rainfall event of 55 mm·h~(-1) applied to a bed-shoulder system (2×1.14 m). The results highlighted differences between the tracers in terms of their enrichment in sediment and different soil aggregate classes. Comparison of the contribution of the different plot sections to the total sediment export using both tracers suggested that most of the sediment originated from the shoulders.
机译:已经建立了许多不同的示踪方法,包括使用稀土氧化物或环境放射性核素。但是,由于现有技术面临各种限制,因此继续寻找替代程序。两种替代的跟踪方法涉及使用亲有机粘土和磁性氧化铁。这项研究对这些示踪剂进行了组合测试,以评估在受控降雨模拟实验下其行为的潜在对比。实验包括将55 mm·h〜(-1)的模拟降雨事件应用到床肩系统(2×1.14 m)上。结果突出显示了示踪剂在沉积物富集和不同土壤聚集体类别方面的差异。使用两种示踪剂比较不同地块剖面对总沉积物出口的贡献表明,大多数沉积物来自肩部。

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