Funktionskontrolle der Fischwechselanlagen am Main-Kraftwerk Kostheim

Schneider, Jörg; Hübner, Dirk

doi:10.1365/s35147-014-1097-z

Cited by 2 publications

(5 citation statements)

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“…The models demonstrate coherent trends for increasing guidance efficiency with flatter screen inclination and with decreasing approach flow velocity. The graphic also features two reference values at larger facility setups [9,11]. The observed values show accordance with the corresponding model predictions.…”

Section: Fish Guidance Considerationssupporting

confidence: 77%

“…Adequate geometric and hydraulic conditions, achieve partial fish protection and downstream guidance even for fish smaller than the bar clearance, where the screen does not serve as physical, but as behavioural barrier. At the same time, the studies are coherent with field observations [9], showing that inappropriate arrangements can entail relevant fish damage at the screen and effectively do more harm than good. The efficiency depends largely on behaviour based guiding effects, which require positive interaction of screen and bypass setup as well as flow conditions.…”

Section: Discussionsupporting

confidence: 61%

“…Similarly, an inclined screen plane can guide fish towards a surface bypass [8]. While rather steep setups failed to achieve relevant guidance, but resulted in unfavourable fish damage at the screen [9], some arrangements with flat inclinations yielded remarkable guidance efficiency for salmons and eel [10,11]. General relations of the efficiency as well as the suitability of such concepts for numerous potamodromous fish species remained so far unresolved, despite their ecological relevance [12].…”

Section: Fish Downstream Passage At Hydropower Plantsmentioning

confidence: 99%

“…Modelling results for bypass passage partitions at 20 mm screens in dependency of fish length, screen inclination and approach flow velocity and comparison to field observations at respective facilities[9,11] error bars indicate the respective spread and uncertainty of the available data…”

mentioning

confidence: 99%

See 3 more Smart Citations

Fish behavior and fish guidance at hydropower intake screens for fish downstream passage

Geiger

Cuchet²,

Rutschmann

2018

E3S Web Conf.

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Fish behaviour investigations under controlled laboratory conditions but nature like environment were conducted to clarify the efficiency of inclined and horizontal screen planes for fish protection and fish downstream passage at hydropower plants concerning different potamodromous species and various sizes. The dependency on the underlying geometric and hydraulic parameters was investigated and comprehensive models were deduced to describe these relations. Adequate geometric and hydraulic design could achieve high levels of fish protection and downstream passage efficiency, even for small fish, weak swimmers and riverbed/bottom oriented species. The results imply good transferability and accordance with field observations at large scale facilities and can provide valuable information for facility design.

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Section: Fish Guidance Considerationssupporting

confidence: 77%

Section: Discussionsupporting

confidence: 61%

Section: Fish Downstream Passage At Hydropower Plantsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Fish behavior and fish guidance at hydropower intake screens for fish downstream passage

Geiger

Cuchet²,

Rutschmann

2018

E3S Web Conf.

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show abstract

“…There was also higher nadir pressure and lower acceleration events (strike/collision) through Kaplan than Francis turbines [126]. Kaplan turbines are not universally safe for fish [127], however, causing mortality rates of 31.2% for cyprinids and percids (3.74 m head) [128,129] and 33% for Atlantic salmon smolts (12 m head) [124]. The severity of injury increases in Kaplan turbines with increasing head [130].…”

Section: Fish Movement Through Turbinesmentioning

confidence: 98%

Fish Injury from Movements across Hydraulic Structures: A Review

Cox

Suthers

Felder

2023

Water

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Fish migration is essential to maintain healthy aquatic ecosystems, but hydraulic structures across rivers have impeded natural fish migration worldwide. While efforts have been made to allow fish to pass some hydraulic structures, there is limited understanding of hydrodynamic effects that cause fish injury in different hydraulic systems, such as spillways and stilling basins as well as hydropower systems. This study reviewed available literature on this topic to identify the current knowledge of fish injury thresholds in laboratory- and field-based studies of hydraulic systems. Often, the hydraulic effects that lead to fish injury have been described with time-averaged simplified parameters including shear stress, pressure changes, acceleration, vortical motions, aeration, collision, and strike, while these hydrodynamic effects often occur simultaneously in the turbulent flows across hydraulic structures, making it difficult to link specific fish injuries to a particular hydrodynamic effect. Strong variations of injury may occur, depending on the type and the intensity of hydrodynamic effects, as well as the fish species and fish sizes. Modelling can provide information of stressors, but real-world tests are needed to accurately assess fish injury and mortality. Fish injury mechanisms at hydropower turbines are well understood, however, clear understanding at other sites is lacking. Future studies should aim to report holistic hydrodynamic thresholds with associated fish injury rates. Multidisciplinary systematic research is required, including laboratory and field studies, using passive tracer sensor packages and state-of-the art instrumentation in conjunction with live fish. This can quantify stressors with meaningful parameters, aiming to improve fish safety with more sustainable design of water infrastructure that reduces fish injury when passing across hydraulic structures.

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Funktionskontrolle der Fischwechselanlagen am Main-Kraftwerk Kostheim

Cited by 2 publications

References 0 publications

Fish behavior and fish guidance at hydropower intake screens for fish downstream passage

Fish behavior and fish guidance at hydropower intake screens for fish downstream passage

Fish Injury from Movements across Hydraulic Structures: A Review

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