How can hydroelectric dams be improved to allow greater passage of juvenile salmon?
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To enhance the passage of juvenile salmon at hydroelectric dams, several key strategies can be implemented. Firstly, utilizing telemetry combined with hydrodynamic modeling can aid in understanding migration route preferences . Physiological assessments play a crucial role in identifying passage issues and guiding infrastructure modifications . Implementing temporary measures like turbine modulation, shutdown during specific times, and reservoir level lowering can significantly reduce migration delays and enhance safety . Adjusting the location of bypass canals closer to turbine intakes can notably increase fish guidance efficiency, impacting migration route choices . Additionally, installing passage solutions like angled racks with bypasses and nature-like fishways can improve downstream passage conditions, with high passage efficiencies observed for both . By incorporating these measures, hydroelectric dams can be improved to facilitate greater passage of juvenile salmon, ensuring their safe and timely migration.
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| Papers (5) | Insight |
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20 Citations | Hydroelectric dams can be improved by implementing angled racks with bypasses and large nature-like fishways, as shown to enhance safe and timely downstream passage for juvenile salmon. |
| Hydroelectric dams can enhance salmon passage by optimizing bypass canal placement and water release timing to increase fish guidance efficiency, reducing mortality and selecting for optimal migratory behaviors. | |
| Temporary measures like turbine modulation, shutdown, and reservoir level lowering can enhance downstream migration of juvenile salmon, reducing mortality and migration delays in hydroelectric dams. | |
| Hydroelectric dams can enhance salmon passage by optimizing fish passage solutions like improving attractiveness and efficiency of nature-like fishways and ensuring adequate water depths and discharges in migration routes. | |
01 Jan 2022 3 Citations | Improving hydroelectric dams for juvenile salmon passage involves addressing physiological stress, disorientation, and energy depletion during downstream migration, considering carry-over effects for successful passage and conservation. |
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