Author(s): Roman Weichert; Martin Henning; Christian Noss; Matthias Scholten

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Abstract: Dams fragment rivers and interrupt ecological connectivity, posing a serious threat to anadromous and diadromous fish populations. To mitigate the effects of river fragmentation, water managers need to build efficient upstream and downstream fishways. Fishways are usually designed to match the requirements of all target fish, even if the requirements are sometimes contradictory, e. g. flow velocities must be high enough to attract strong swimmers, but should not impede passage by weak swimmers e.g. (Schütz et al., 2024). Simultaneously, fishways must be affordable and constructible, often restricted by limited space. For these reasons, fishways often constitute a compromise between several challenging requirements.

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Year: 2026