Brown Trout Upstream Passage Performance for a Fishway with Water Drops between Pools beyond Fish Passage Design Recommendations

نویسندگان

چکیده

This work aims to assess brown trout (Salmo trutta) passage through a free-flow pool-weir-type fishway with hydrodynamic notches and extreme water drops between pools. It consists of an old-school design, commonly constructed in salmon rivers Spain during the period 1950–1980. To their performance, field test was designed confined trial conditions spawning migratory season. The mean drop pools 0.65 m total height considered for 11.8 m. monitoring carried out using PIT telemetry. initial hypothesis, considering design assessment guidelines, classified this structure as hardly insurmountable. Results showed ascent success 19% median transit time 29.1 min/m ascended height. Larger fish sections lower values volumetric power dissipation were related better performance passage. results suggest that certain circumstances, such limited construction areas where other or management options are difficult implement (e.g., canyons), type may be alternative upstream at least small proportion population, although selection effect is expected.

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ژورنال

عنوان ژورنال: Water

سال: 2022

ISSN: ['2073-4441']

DOI: https://doi.org/10.3390/w14172750