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Faculty of Civil Engineering and Architecture, University of Nis , Niš , Serbia
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Faculty of Civil Engineering and Architecture, University of Nis , Niš , Serbia
strrom GmbH , Heidenheim , Germany
Faculty of Civil Engineering and Architecture, University of Nis , Niš , Serbia
Fish passages represent a key engineering and ecological measure for restoring the longitudinal connectivity of watercourses disrupted by hydraulic structures. This paper presents the conceptual design of a nature-like fish passage at the Djerdap 2 hydropower plant on the Danube River. The study includes route definition, hydraulic sizing under complex site constraints, and assessment of ecological compatibility using literature-based criteria for relevant migratory fish species. The adopted concept was developed with reference to the fish passage at Freudenau in Vienna. The results indicate hydraulically feasible and ecologically acceptable internal flow conditions, while additional modelling of the entrance zone is recommended for final design verification.
fish passage, Danube River, ecological continuity, hydraulic calculation, close-to-nature fishway
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