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<p>In the Wachau, one of the two free-flowing sections of the Austrian Danube, a&#xa0;comprehensive tracer study was conducted for the first time to investigate bedload transport. The study aimed to analyze transport distances, velocities, and residence times of sediment particles under varying flow conditions. For this purpose, 45&#xa0;tracer stones equipped with VHF transmitters were introduced and tracked over a&#xa0;period of 17&#xa0;months. The results reveal that bedload transport is significantly influenced by grain size, initial position, and hydrological conditions, as well as by local river morphology. Due to size selective transport, the smaller stones were on average transported over longer distances. The methodology proved effective with a&#xa0;high recovery rate (&gt; 99%) and provided detailed insights into sediment dynamics, forming a&#xa0;solid basis for sustainable sediment management and practical measures for riverbed stabilization.</p>

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Messung des Geschiebetransportverhaltens in der Donau in der Wachau mittels aktiver Tracer

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月25日

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  • Philipp Gmeiner,
  • Marcel Liedermann,
  • Martin Hinterleitner,
  • Elisabeth Mayerhofer,
  • Sebastian Pessenlehner,
  • Christoph Hauer,
  • Helmut Habersack

摘要

In the Wachau, one of the two free-flowing sections of the Austrian Danube, a comprehensive tracer study was conducted for the first time to investigate bedload transport. The study aimed to analyze transport distances, velocities, and residence times of sediment particles under varying flow conditions. For this purpose, 45 tracer stones equipped with VHF transmitters were introduced and tracked over a period of 17 months. The results reveal that bedload transport is significantly influenced by grain size, initial position, and hydrological conditions, as well as by local river morphology. Due to size selective transport, the smaller stones were on average transported over longer distances. The methodology proved effective with a high recovery rate (> 99%) and provided detailed insights into sediment dynamics, forming a solid basis for sustainable sediment management and practical measures for riverbed stabilization.