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Study of long shore sediment transport in the vicinity of hydrotechnical constructions

机译：水利工程建设附近长岸输沙研究

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摘要

This paper considers results of experimental investigations incorporating fluorescent tracers to analyze sediments transport in the vicinity of hydrotechnical constructions in Lake Kinneret (Israel). The fluorescent tracer method uses sediments tagged with ecologically-harmless fluorescent stains of several colors. The tracers, having the same hydrodynamic properties as the original (un-coated) particles, are placed at their original sites and then traced "downstream" of the nearshore currents. Due to high sensitivity of the method, very small concentrations of the stained sediment particles can be detected providing precise quantitative data on bed-load transport processes. We have developed three methods for quantitative measurements based on: 1) visual scanning and counting, 2) excitation emission scanning spectroscopy, and 3) optical absorption of extracts in organic solutions. An example of application of two differently colored tracers is presented, showing the patterns of bed load transport in the vicinity of hydrotechnical constructions. These investigations show that hydrotechnical constructions, like jetties, disrupt the long-shore transport (partially or completely, depending on the bottom slope at the littoral zone) and activate sediment separation process within the space between these constructions.
机译：本文考虑了结合荧光示踪剂的实验研究结果，以分析Kinneret湖（以色列）水利建筑附近的沉积物迁移。荧光示踪法使用沉积物标记了几种颜色的对生态无害的荧光染料。具有与原始（未涂层）颗粒相同的流体动力学特性的示踪剂被放置在其原始位置，然后被追踪到近海流的“下游”。由于该方法具有很高的灵敏度，因此可以检测到极低浓度的被污染的沉积物颗粒，从而提供有关床载运输过程的精确定量数据。我们已经开发了三种基于定量的测量方法：1）视觉扫描和计数，2）激发发射扫描光谱法和3）有机溶液中提取物的光吸收。给出了两个不同颜色的示踪剂的应用示例，显示了在水利工程施工附近的床层荷载输送方式。这些调查表明，水工建筑，如码头，扰乱了沿岸运输（部分或全部取决于沿海地区的底坡），并在这些建筑之间的空间内激活了泥沙分离过程。

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  • 来源
  • 会议地点 Lemnos(GR);Lemnos(GR);Lemnos(GR);Lemnos(GR)
  • 作者

    B. Shteinman; Y. Kamenir;

  • 作者单位

    Israel Oceanographic and Limnological Research, Yigal Allon Kinneret Limnological Laboratory, P.O.Box 345, Tiberias 14102, Israel;

    Israel Oceanographic and Limnological Research, Yigal Allon Kinneret Limnological Laboratory, P.O.Box 345, Tiberias 14102, Israel;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 海洋工程;
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