HEAD OF FISH CONSERVATION WORKS AND METHOD OF FISH ATTRACTION Russian patent published in 2005 - IPC

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to constructions and method aimed at passing spawners through support facilities to places of spawning ands fattening. Proposed head of fish conservation works includes supply unit connected with head water by gate installed in bypass culvert, fish attracting device in form of guides installed before intake part of fishway and made in form of horizontally arranged collectors with non-submerged water outlet holes whose central axes are orientated at different angles to water surface. Collectors are connected with end parts of bypass culverts, being installed for rotation relative to intake part of fishway and made in form of pipes used as base of carrying trusses whose vertical support booms are made coaxially with end parts of bypass culverts. Lower parts of booms are made hollow, being connected with inner space of collectors and bypass culverts. Carrying trusses are connected with drive. To attract fish, "sweep" to attract fish is formed at intake of fish conservation works by opening supply unit to preset value, delivering main attraction water over entire depth of flow and additional attraction water to surface horizons of flow and concentration of fish before intake of fish accumulator-trough. Additional attraction of fish is provided from side of water discharge front of diversion unit with subsequent shifting at end of attraction process of additional attraction water to side of longitudinal attraction water to side of longitudinal axis of fish accumulator-trough. Fish getting into zone of action of additional attraction water is entrained and transferred to zone of action of main attraction water. At end of process of attraction, delivery of additional attraction water is stopped, and fish is concentrated before intake of accumulator-trough.

EFFECT: provision of hydraulic conditions to attract fish from large width of waterway.

3 cl, 5 dwg