Fish free passage problems in inland waters have long been reported. Many fishways were built to re-establish corridors for fish movement, in particular in Germany a highlight of nature-like fish passes are emphasized. This research presents the results of hydraulic model test about mean flow patterns and turbulence structures in nature-like pool-type fish passes and the comparison with conventional technical type. The turbulent kinetic energy is recommended to represent the scale of turbulence flow and its influence on fish performance. The fieldwork for assessing the effectiveness of two bottom ramps and two fish ramps in the river System of Mangfall in upper Bavaria for fish migration by geometrical and hydraulic investigations during low flow, mean flow and high flow conditions was conducted and adequate design principles and standard operating procedures of monitoring work are developed. The current legislations related in fish migration problems due to hydropower plants are discussed.
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Fish free passage problems in inland waters have long been reported. Many fishways were built to re-establish corridors for fish movement, in particular in Germany a highlight of nature-like fish passes are emphasized. This research presents the results of hydraulic model test about mean flow patterns and turbulence structures in nature-like pool-type fish passes and the comparison with conventional technical type. The turbulent kinetic energy is recommended to represent the scale of turbulence...
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