FISH PASSING AND SPAWNING CHANNEL (VARIANTS) Russian patent published in 2006 - IPC E02B8/08 

FIELD: hydraulic structures, particularly fish passes to permit fish passage through support structures to fish hatchery and growth areas.

SUBSTANCE: fish passing and spawning channel comprises waterway made as a channel with head part connected to upper pool and mouth part communicated with lower pool of hydrosystem, rough members located on channel bottom and extending along the full length thereof, additional flow paths with head parts communicating with waterway and with mouth parts connected with low pool water pass to create multi-head inlet head with independent fish passes. Longitudinal axes of additional flow paths extend at different angles to longitudinal water pass section. In accordance with the first embodiment mouth waterway part is made as submersed inlet head with bottom swimming-in orifices. Head parts of additional through flow paths are connected with prechamber, which connects mouth waterway part with head part thereof and mouth parts of additional through flow passes with bottom swimming-in orifices. Independent fish passes are made as pressure pipes. In accordance with the second embodiment mouth waterway part has submersed inlet head with bottom swimming-in orifices. Head parts of additional through flow paths are connected with bottom waterway part separated from mouth part thereof with bottom transversal partition. The mouth parts of additional through flow paths are connected with bottom swimming-in orifices. Independent fish passes are also made as pressure pipes.

EFFECT: creation of hydraulic fish-attractive conditions in lower pool to increase probability of bottom-living fish passage into inlet heat of fish passing and spawning channel.

29 cl, 58 dwg