FISHWAY (VERSIONS) Russian patent published in 2005 - IPC

FIELD: hydraulic works.

SUBSTANCE: invention relates to fish conservation works designed to pass fish spawners through retaining facilities to placed of spawning and fattening. Proposed fishway includes fish conduit made in form of channel whose outlet head is connected with upper pond of hydraulic works, and intake head, with lower pond, cross partitions with swim-in holes, and device to regulate water level in fish conduit made in form of additional cross partitions located higher than minimum designed water level in fish conduit. Lower edges of partitions are made parallel to bottom of fish conduit. Device to regulate water level is furnished with system of perforated pipelines connected with compressor which is arranged under lower edges of additional cross partitions being displaced relative to said partitions upstream. Additional cross partitions are made widthwise fish conduit. According to first design version, perforated pipelines are arranged across longitudinal axis of fish conduit, and according to second version, along said axis. Invention provides effective hydraulic conditions in fish owing to possibility of control of operating conditions of fishway and creating conditions for moving bottom fish along fish conduit to upper pond of hydraulic works.

EFFECT: enhanced reliability in operation.

34 cl, 53 dwg