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

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

SUBSTANCE: fish pass comprises fish-passing path created as canal having inlet head connected to upper pool of hydrosystem and outlet head connected to lower pool thereof, as well as roughness members made as flexible rods. The rods are grouped in transversal rows and are connected to canal bottom in cantilever manner. The rod rows extend for the full canal length. Canal areas free of vertical members are defined in transversal rows between vertical members, which have equal height equal to flow depth. Areas free of vertical members arranged along fish-passing path are grouped along sinusoidal line and define through canal simulating meandering river bed.

EFFECT: possibility to create hydraulic conditions, which facilitate fish movement along fish pass.

12 cl, 15 dwg