| 摘要 |
FIELD: transport. ^ SUBSTANCE: invention relates to method of utilisation and transfer of fish producers through retaining works. Method consists in forming a controlled water flow along the whole length of fishway; water flow depends on level difference of upper and lower pools, type of passing fish, and fishway created in every chamber due to water supply to jet-generating nozzles to be arranged around the perimeter of float-in openings in the division walls and directed towards the upper pool; further forming of two parallel or arranged angularly to float-in opening axis rows of parallel hydraulic jets and creating (at interaction of these jet rows) the hydraulic resistance to the main flow coming along the fishway through chambers from the upper pool; thus creating a favourable conditions for fish passage through float-in openings towards the upper pool. At the initial stage of fishway operation, fishway shall be filled-in with water from the upper and lower pools of hydrosystem simultaneously. To do this, the upper gate is opened slightly, then practically at the same time the lower gate is opened, water flows are supplied simultaneously from the upper and lower pools of hydrosystem, and fishway starts filling-in with water. When float-in opening of fishway inlet chamber or sluiceway entrance is filled-in with water, a jet-generating nozzle system is switched on at the inlet division wall of fishway. When the design water level is reached in fishway inlet chamber or sluiceway entrance, jet-generating nozzle systems are switched on at the rest of division walls of fishway. After this, water levels begin to rise up to design values in the fishway chambers arranged above the fishway inlet chamber. When design water level is reached in all the rest fishway chambers, the upper and lower gates of fishway are to be fully open. ^ EFFECT: invention improves effectiveness of control at initial stage of fishway operation. ^ 10 dwg |
