METHOD OF WORK fish ladders fish ladder HOLES AND CONSTRUCTION its implementing

摘要

FIELD: construction, hydrotechnical engineering.;SUBSTANCE: invention is related to methods and structures intended for attraction and transfer of brood fishes through supporting structures. Design of fish pass holes of fishway arranged in transversely laid vertical separating walls that divide fishway into chambers of rectangular, square or circular shape, along perimeter of which jet-generating nozzles are arranged and equipped with barrier canopies. Outlet holes of nozzles may be located directly in swim-in holes between planes of side surfaces of transverse separating walls. Jet-generating nozzles communicate with distributing headers arranged inside transverse partitions. Inlet hole of pipeline feeding the pump is installed in lower (bottom) part of side wall of tray (chamber) of fishway, near transverse separating wall and downstream side part of barrier canopy of fish pass hole, which is nearest to side wall of tray (chamber) of fishway.;EFFECT: invention increases efficiency of fish attraction to fish pass structure.;3 cl, 10 dwg