In the present work, a new type of fish pass is presented. The use of alternating vertical sluice gates and impingement walls avoids the entrainment of air into the water. In a first step, experimental data with fish is presented in order to demonstrate the acceptance of the fish pass. A series of experimental data is presented for the discussion of the correlation between flow and geometry of such a fish pass. The use of parameter studies led to design rules. By means of a Large Eddy Simulation an analysis of the instantaneous flow regime was possible. The distribution of velocity and turbulence fields, as well as coherent turbulent structures allowed a better understanding of fish behaviour. Additionally to the basic principle, a geometric variation is presented. By means of a geometric expansion, the passage becomes possible for small organisms like macrozoobenthos and fish which live near the riverbed as well as small fish.
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In the present work, a new type of fish pass is presented. The use of alternating vertical sluice gates and impingement walls avoids the entrainment of air into the water. In a first step, experimental data with fish is presented in order to demonstrate the acceptance of the fish pass. A series of experimental data is presented for the discussion of the correlation between flow and geometry of such a fish pass. The use of parameter studies led to design rules. By means of a Large Eddy Simulation...
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