SU1680860A1 - Fishway - Google Patents

Description

one

(21) 4418723/15

(22) 04/29/88

(46) 09/30/91. Bul №36

(71) All-Union Design and Survey and Research Institute Hydroproject them. S.Ya.Zhuk

(72) A.L. Lentov and G.G.Filippov

(53) 626.88 (088.8)

(56) USSR Author's Certificate No. 1281631, cl. E 02 B 8/08, 1985.

USSR Author's Certificate No. 1557249, cl. E 02 B 8/08, 1987.

(54) FISHING

(57) The invention relates to hydraulic engineering and can be used to pass spawning fish through hydraulic structures. The purpose of the invention is to increase the efficiency of passing fish by improving the hydraulic conditions at the entrance to the structure. The fish pass includes a tray 1 with walls 2, divided by longitudinal walls 3 into channels 4, in which partitions 5 with holes 6 are installed. In the downstream 7 there is an inlet 8 of tray 1, with partitions 5 of channel 4 located at different distances x or together with the walls 2 of the tray 1 and the walls 3 of the channels 4, the accumulating basin 9. When water passes through the channels 4, each of them has its own flow pattern, and in the entrance chamber 8 and the storage basin 9 a flow is formed with irregular velocities . The fish approaching the structure, hitting the pool 9 and orienting at the speed it needs, approaches the lower partitions 5 and through the holes 6 hitting the channels 4 passes into the upstream of the structure. 4 il.

(L

The invention relates to hydraulic engineering and can be used to pass fish for spawning through hydraulic structures.

The purpose of the invention is to increase the efficiency of passing fish by improving the hydraulic conditions at the entrance to the structure.

FIG. 1 shows a fish pass, a plan; figure 2 is the same, a longitudinal section; in FIG. 3, section A-A in FIG. 2 (for a structure operating at a constant level of pools); 4 is the same for a structure operating at varying levels of pools.

The fish pass includes tray 1 with walls 2, divided by longitudinal walls 3 on

channels 4 in which transverse partitions 5 with holes 6 are installed. In the downstream 7 there is an inlet flap 8 of the tray, while the partitions 5 of the channels 4 are located at different distances from the gate 8 and form together with the walls 2 of the tray 1 and the walls 3 channels 4 accumulative pool 9.

Fish navigator works as follows.

Downstream 7 through channels 4 of the tray is supplied with the necessary water flow to attract fish. In each channel 4, depending on the number of partitions 5, a water drop is established at the openings 6. As a result, through each channel

00

about

00

oh oh

4, an appropriate water flow rate is supplied. At the entrance 8 and the accumulation basin 9, a flow of water is formed with speeds that are not uniform in width.

The fish attracted to the fish passage are able to choose the most favorable for their flow rates in accordance with their physical capabilities. Once in the accumulation basin 9, the fish, oriented at the speed of the bottom, goes to the lower partitions 5 through the inlets 6 into the channels 4 further along them rises to the waterfall of the structure.

When the water levels in the downstream change during the operation of the fish passage, the differences in each channel 4 change accordingly. Therefore, in the storage basin 9, on the lower partitions 5, different drops of water are observed, which in turn allows the fish to choose the most favorable tny speed limit and differential for it. With significant fluctuations in water levels, for example, on tidal electroformation2

five

0

Qi x, it is advisable to perform the thresholds of the openings 6 of the lower partitions at a different level. This makes it possible, at extreme levels of water levels, to provide favorable conditions at the entrance to one of the channels 4, and to pass the transit flow through the others, without reducing the total attracting water flow at site 8, which ensures efficient operation of the fish passage.

Claims (1)

Claims of the invention A fish pass, made in the form of a tray divided by longitudinal walls into several channels having a common entrance gate, in which transverse partitions with holes are installed, characterized in that, in order to increase the efficiency of fish passage by improving the hydraulic conditions at the entrance to the structure, the partitions channels in the downstream are located at different distances from the input section and form together with the walls of the tray and channels accumulative pool. l RUU Y sf) (sr s x U S J / I 2 f Dh  Y sf) (sr s x Y S J / I 2 6 FIG. four