METHOD TO CONTROL LONGSILL CURRENT AND FISH GUIDE FOR IMPLEMENTING METHOD Russian patent published in 2005 - IPC

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to hydraulic works designed for passing fish spawners through retaining facilities to places of spawning and fattening. According to proposed method regulated fish directing current is formed along downstream side of bottom sill by delivering water from side of spillway dam, subsequent delivery of attraction water from trough-fish storage and formation of longitudinal screw roller formed behind downstream side of bottom sill. In case of change of amount of discharge water through spillway dam and in case of increase or decrease of depth of water in lower pond, total height of bottom sill is changed to change height mark of its upper side. Fish guide includes bottom fish guide sill installed at angle to longitudinal axis of fish facility and adjoining inlet part of trough-fish storage, device to control longsill current which can change its height mark of upper side by means of drive and baffle stationary secured on upper side of bottom sill from side of downstream headless side wall to form horizontal web. Device to control longsill current is located on web and is made I form of flexible elastic envelope connected with compressor through branch pipe and supply air conduit.

EFFECT: provision of effective control of, longsill current in case of changes of water level in lower pond of hydraulic works.

14 cl, 15 dwg