Purpose: development of design solutions and methods for hydraulic calculation of fish pass and fish passing-spawning channel tracts of a cross-sectional polygonal shape.
Materials and methods. The basis of this study was: information obtained from the analysis of well-known and original proposals on design and methods of calculating channel tracts; materials for fish farming and biological substantiation of channel projects operating as part of the Lower Don waterworks.
Results. The need for the formation (development) of proposals for design solutions and methods of hydraulic calculation of floodplain-bed tracts of fish pass and fish passing-spawning channels has been determined. Two options for the structural design of tracts characterized by a one-sided (relative to the bed) single and two-stage floodplain shape are proposed. The developed structures ensure the formation of fish movement and spawning zones of different depths and flow speeds in the channel water area. Taking into account the peculiarities of the cross-section shapes of channel tracts and the formulated ichthyological requirements for their design, the appropriate hydraulic calculation methods were developed and their numerical testing was carried out. A feature of the proposed methods is the introduction of calculated dependencies that take into account the fishery requirements for creating channel tracts, into their composition.
Conclusions. The feasibility of constructing fish pass and fish passing-spawning channels with a polygonal (floodplain-bed) cross-sectional shape has been established. Design schemes and methods for hydraulic calculation of channel tracts of floodplain-bed cross-section with one-sided single- and two-stage floodplains have been developed.
fish migration, fish spawning, fish passage channel, fish passing-spawning channel, channel track, hydraulic calculation of the polygonal channel tract
Shevchenko A. V., Shkura V. N. Hydraulic calculation of fish pass and fish passing-spawning channel tracts with floodplain-bed cross-section. Ways of Increasing the Efficiency of Irrigated Agriculture. 2023;91(3):300–309. (In Russ.).
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