FIELD: construction.
SUBSTANCE: method to control passage of fish through hydraulic unit consists in formation of a controlled water flow with the help of water jets outflowing from jet-forming nozzles, framing inflow holes, in a fish-passage route equipped with separating walls with inflow holes. Jet-forming nozzles are installed along with the flow of a transit flow and towards transit flow. Speed mode of water flow along fish-passage route is controlled by intensity of water jets supply by changing their number n. Initial speed of water jets outflow from jet forming nozzles directed along with transit flow required to form optimum attracting flow is determined by a given dependence.
EFFECT: reduced length and reduced material intensity of fish passage route, provision of formation of speed mode of water flow in fish-passage route required for free passage of fish in it from one reach of hydraulic unit into the other in case of considerable oscillations of water levels in reaches and difference between them, provided that maximum favourable conditions are available for passage of various migratory and half-migratory fish.
4 cl, 1 tbl, 1 ex, 7 dwg
