FISH PASS (VARIANTS) Russian patent published in 2006 - IPC E02B8/08 

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

SUBSTANCE: fish passage comprises waterway shaped as canal and having head part connected to upper pool of hydrosystem and mouth part communicated with lower pool thereof. Arranged on canal bottom are rough members, which are distributed along canal length. The fish pass also comprises additional through course connected with water supply course. Head part of additional course is independent and arranged upstream of head part of water supply course so that multi-head inlet head is created. The fish pass includes hatchery substrate formed as gravel-and-pebble filler. Additional through course has length equal to that of water supply course and is communicated with water supply course by means of connecting units formed by intersecting of additional through and water supply courses angularly related to each other to create closed sections. Head part of additional through course is parallel to head part of water supply course. Fish pass in accordance with the second embodiment comprises additional through course, which intersects water supply course in connection unit area. The connection unit area is defined by intersection of additional and water supply courses angularly related to each other and creating closed sections. Additional through course in connection unit area is formed as tray. Water supply course bottom in area of two courses intersection is of plunging type so that additional through course of waterway orifice is created under the tray.

EFFECT: provision of highly-efficient hydraulic conditions for fish passage due to damping of kinetic energy.

17 cl, 21 dwg