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

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

SUBSTANCE: fish pass comprises fish-passing channel made as gutter having outlet head connected to upper pool of hydrosystem and inlet head communicated with lower pool thereof. Fish pass also has additional water flow supply system, which supplies additional water flow to the inlet head for fish attraction. The additional water flow supply system is made as pressure manifolds with unsubmerged water discharge orifices formed in upper part of inlet head gutter sides and facing each other. The fish pass also has water supply conduit having flow regulator and communicating pressure manifolds with upper pool. Water discharge orifices are grouped in rows along pressure manifold heights and lengths. Central axes of water discharge orifices of each horizontal row of right and left pressure manifold branches are in parallel horizontal planes. Central axes of water discharge orifices of each vertical row formed in right and left pressure manifold branches are in parallel vertical planes. Water discharge orifices of left and right pressure manifolds branches are coaxial to each other.

EFFECT: improved fish-attractive conditions.

2 cl, 4 dwg