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<p>Injury and survival to the fish species chub <i>(Squalius cephalus)</i>, nase <i>(Chondrostoma nasus)</i> and grayling <i>(Thymallus thymallus)</i> during passage through Kaplan turbines was estimated using HI-Z Tag techniques at two medium-sized run-of-river hydropower plants. Survival rates (48 h) of juvenile fish were between 87 % and 94 % and for adult fish were between 75 % and 90 %. In addition, the number of individuals injured or affected by loss of equilibrium was species-specific. The lower mortality at the Mur power plant compared to the Drau power plant can plausibly be explained by a lower number of turbine blades (four instead of five), a lower hydraulic head and a slightly slower turbine runner speed.</p>

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In-situ-Erhebung der Schädigung von Fischen beim Durchgang großer Kaplan-Turbinen

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Clemens Ratschan,
  • Maximilian Zauner,
  • Gerald Zauner,
  • Cory Hoffman,
  • Andreas Zitek,
  • Josef Schneider

摘要

Injury and survival to the fish species chub (Squalius cephalus), nase (Chondrostoma nasus) and grayling (Thymallus thymallus) during passage through Kaplan turbines was estimated using HI-Z Tag techniques at two medium-sized run-of-river hydropower plants. Survival rates (48 h) of juvenile fish were between 87 % and 94 % and for adult fish were between 75 % and 90 %. In addition, the number of individuals injured or affected by loss of equilibrium was species-specific. The lower mortality at the Mur power plant compared to the Drau power plant can plausibly be explained by a lower number of turbine blades (four instead of five), a lower hydraulic head and a slightly slower turbine runner speed.