FISH-PASS (VARIANTS) Russian patent published in 2007 - IPC E02B8/08 

FIELD: hydraulic building, particularly fish-passing structures permitting fish passage through support structures to fish hatchery and growth areas.

SUBSTANCE: fish-pass comprises fish passing channel connecting upper hydrosystem pool with lower one through inlet and outlet ends, transversal partitions serially arranged along fish passing path and defining working chambers, surface swimming-in orifices made in transversal partitions and arranged in different longitudinal sections, water intake orifices covered with fish-stopping grid and made in bottom of each working chamber upstream of surface swimming-in orifice from upper pool side. Fish-pass also has bottom spillway manifold connected with water intake orifices, arranged under fish-passing path and communicated with lower pool. Outlet end of bottom spillway manifold is covered with fish-barrier grid, arranged upstream of the first transversal partition and mates lower pool bed bottom. Additional water intake orifice is made in bottom of each working chamber upstream of surface swimming-in one from upper pool side. Said orifice is closed with fish-stopping grid. Main and additional water intake orifices are connected with each other and with bottom spillway manifold. Fish-pass made in accordance with the second embodiment has main and additional water intake orifices arranged in lower part of surface swimming-in orifice. Main and additional water intake orifices are connected with bottom spillway manifold through discharge waterway made inside transversal partition.

EFFECT: provision of hydraulic conditions efficient for fish passage in upper hydrosystem pool.

15 cl, 19 dwg