Fish passage-spawning channel

 

The invention relates to hydraulic construction, namely to fish passage structures designed to pass fish producers through retaining structures for spawning and feeding. Fish passage-spawning channel includes fish passage tract with elements of enhanced roughness, defined along its length, connecting the upper and lower pools of the waterworks via the output and input headroom. At the site of the last executed trueforms device with the guide walls forming an offline channel. The guide wall streammessage device made in the form of curvilinear in plan thresholds, the end part of which is placed in the input end of fish passage tract, and the start of their parts are made in the stream with the possibility of sinking libprelude offline channels, allowing you to catch fish along the width of the watercourse and translate it directly in the input part of the fish passage-the spawning channel. The invention allows to create effective hydraulic conditions in the zone of influence of the input end through sustainable tactile reference points for fish in the form of a curved bottom thresholds, allowing stabilin is-before:always;">

The invention relates to hydraulic construction, namely to fish passage structures designed to pass fish producers through retaining structures for spawning and feeding.

Known fish passage-spawning channel [1], including fish passage path defined along its length elements enhanced roughness, photocopiers device in the form of a louver system, made in the input part of the input end and connected to the drive move truefinish plates.

The disadvantage of this structure is the complexity of the system management plan location louvered plates. In addition, the louver system generates attracting fish flow throughout the depth of flow, while the mode of operation of fish passage-spawning channels oriented to pass sturgeon, the main habitat of which is the near-bottom horizons of the stream.

The closest technical solution is fish passage-spawning channel [2], including fish passage tract with elements of enhanced roughness, defined along its length, connecting the upper and lower pools of the waterworks via the output and input headroom, at the site of the last vypilennogo structures is the low efficiency of distribution of attracting fish stream in the bottom horizons of the thread since the major part of the kinetic energy of the flow supplied through the offline channel is suppressed in the area of location of the guide walls of the flow.

The objective of the invention is to increase the efficiency of using demersal fish species in fish passage tracts of fish passage-spawning channels.

This object is achieved by volneniem guide walls in the form of a curvilinear in plan, bottom sills and placing them end part directly in the input tip fish passage-spawning channel that allows you to create a stable hydraulic conditions for attracting demersal fish species (e.g. sturgeon), moving across the width of the river. Bottom sills made curved in the plan that most closely replicate the line currents flow coming from fish passage-spawning channel, which promotes the formation of stable geometric borders attracting fish "plume" speeds. On the other hand, suitable from the downstream of the fish due to the presence in the bottom part of the flow of tactile cues in the form of bottom sills allows you to secure the entry of fish into the input end of fish passage-the spawning channel. Execution of the end parts of the thresholds directly in the input tip p of the CT and accordingly, to get further into the upstream face. The formation of the initial parts of the rapids libprelude flows and, accordingly, offline channels allows the fish, without changing its planned location and routes of movement, to move from the Central part of the stream directly to the input end of fish passage-spawning channel.

The initial part of the bottom sills in one cross the river, helps to ensure uniform conditions for entry of fish across the entire width of the stream entering the zone of influence of the curved bottom of the rapids.

The initial part of the bottom sills in different transverse cross-sections of the river, helps to ensure the ability of the fish to change track their movements within the zone of influence offline channels, while remaining potential objects to skip in the upstream face. In addition, the width offline channels there are different size flow rate, as well as fish has the ability to select the most favorable hydraulic conditions, it has the possibility of choosing a standalone channel, high speed mode which corresponds to its swimming ability, moreover, the offset of the initial part of the extreme n the current what is no less conducive to the imposition of this threshold in the direction of the river.

Execution end sections of the bottom of the rapids were flooded allows, regardless of the wind surge (or storm events) to provide independent attraction of demersal fish species.

Execution end sections of the bottom of the rapids unflooded, in the form of longitudinal partitions allows you to create a more stable hydraulic conditions in the target output attracting flow from the input end. Both the bottom and the surface portion of the flow gets stable direction and generates attracting the flow in the confluence zone of the flow of fish passage-spawning channel and the transit flow of the river.

Running the rapids of different height, decreasing down the river, allows you to create a secondary flow with different intensity and different hydraulic parameters that, in turn, allows workers to choose the most favorable conditions for progress towards the input end.

Running the rapids with the G-shaped visor, hosted by their pressure faces, increases the likelihood of the guaranteed promotion of the demersal fish species along the rapids. L-shaped visor the morning the space and lack of exposure to it with a good flow of the river. In addition, you can move some fish along the canopy, forming a sort of screen cover.

The perform of the bottom of the Autonomous channels formed by side walls curved bottom sills with a mark below the lower end of the rapids, effectively conveying drawn drifts outside the area of the bottom of the rapids in the downstream side.

Different cross-sectional shape formed by the bottom of the niche (rectangular, triangular or ovoidalnaya) increase the intensity of longitudinally-helical nature of the leakage flow between the thresholds.

In General, structural characteristics as the main point of the invention, and additional items that meet the criterion of "significant differences" and are interconnected so that they form a single creative idea.

The solution of this problem is achieved by the structural arrangement of the input cap in the form of a curved bottom sills and modification of their shape. Graphic material shown on the following drawings:

- Fig.1 - input tip fish passage-spawning channel, the initial part of the bottom sills located in the same transverse cross-section, a fragment of the plan;

- the section I-I in Fig.2, end part of the bottom sills performed flooded;

- Fig.4 is a cross section I-I in Fig.2, the end part of the bottom sills made unflooded;

- Fig.5 is a cross section end portion bottom sills sills made of different heights;

- Fig.6 is a bottom sills are made of different heights, isometric;

- Fig.7 - non-pressure face of the bottom sills made with G-shaped visors;

- Fig.8 - non-pressure face of the bottom sills made with G-shaped visors, while the bottom sills are made of different heights;

- Fig.9 - terminal part of the bottom sills in the area of the input tip is made unflooded, isometric;

- Fig.10 is the same, the end part of the bottom sills made of different heights, the input tip is made unflooded, isometric;

- Fig.11 is an embodiment of the bottom of the rapids with the mark of the bottom between the thresholds is lower than the elevation of the lower end part of the rapids, a rectangular cross-section, isometric;

- Fig.12 is an embodiment of the bottom of the rapids with the mark of the bottom between the thresholds is lower than the elevation of the lower end part of the rapids, a triangular cross-section, isometric;

- Fig.13 is an embodiment of the bottom of the rapids with the mark of the bottom between the thresholds is lower than the elevation of the lower corsetry tract 1 dened by its length elements enhanced roughness (not shown), connecting the upper and lower pools of the waterworks via the output and input headroom, trueforms device made in the form of a curvilinear in plan, bottom sills 2, the end part 3 which is placed in the input end of fish passage tract 1, and the initial part of them is made on the in-stream 4 and forms a bottom libprelude offline channels 5. Non-pressure face 2 thresholds can be performed with the G-shaped visors 6, the formation of additional independent channels 7 (Fig.8-9). The bottom of offline channels 5 can be performed with Donna alcove 8, having a different geometric shape (Fig.11-13).

Fish passage-spawning channel works as follows.

Depending on the fisheries situation in the downstream waterworks service manual fish passage-spawning channel supports the normal operation of the fish passage facility, providing the flow fish passage in the tract 1. Due to the presence of the target input tip streammessage device in the form of a curved bottom threshold 2 in the zone is created which attracts fish "plume" of velocities generated favorable hydraulic conditions to ensure stable engagement of the falls in the zone of influence of the bottom sills 2 and using them as a tactile reference point, moving through offline channels 5 to the input end fish passage facility. Since the end part 3 bottom sills 2 is located directly in the input tip (Fig.1 and 2), fish passes fish passage in the tract 1 and then, overcoming his entire length, enters the upstream face of the waterworks. Efficient accumulation of fish in the zone of influence of the bottom sills 2 contributes to various initial placement of the parts relative to the cross-sections of the watercourse. The location of the initial parts of thresholds 2 in the same target (Fig.1) allows you to create uniform conditions for entry of fish into offline channels 5. The flow coming from the inlet end, flow along the curved thresholds 2 and due to the formed together with the transit flow of the river longitudinal helical motion provides a robust, stable, attracting bottom fish in the stream. The formation of stable borders attracting flow contributes to the curved shape of the rapids 2, essentially repeating the line currents. Accommodation the initial parts of thresholds 2 shifted relative to each other (Fig.2), bottom allows the fish to choose the most favorable conditions for selecting one of Avtonom intensity and with different hydraulic parameters, that, in turn, allows workers to choose the most favorable conditions for passage in the side of the input cap. Due to the different height thresholds 2 creates a tactile reference point depth of flow, which increases resonabley effect for the fish in the depth of the watercourse 4 and surface species of fish. Execution of the end parts 3 flooded (Fig.3) and unflooded (Fig.4) contributes to the stabilization of the hydraulic conditions in the target input end, and directly generated in attracting fish "loop".

When using the option with G-shaped visors 6 placed with non-pressure face 2 thresholds, the fish is able to move along more Autonomous channel 7 (Fig.7 and 8).

The variant with bottom recesses 8 formed in the space between the side walls 2 thresholds, which can significantly improve nanotransporters the ability of Autonomous channels 5 (Fig.11-13).

The present invention allows to significantly increase the efficiency of attracting demersal fish species in fish passage tracts of fish passage-spawning channels.

Sources of information

1. USSR author's certificate No. 1703781, E 02 In 8/08, op. BI No. 1, 1992.

2. Copyright certificate Sidnal, including fish passage tract with elements of enhanced roughness, defined along its length, connecting the upper and lower pools of the waterworks via the output and input headroom, and at the site of the last executed trueforms device with the guide walls forming an offline channel, wherein the guide wall streammessage device made in the form of curvilinear in plan thresholds, the end part of which is placed in the input end of fish passage tract, and the start of their parts are made in the stream with the possibility of sinking libprelude offline channels.

2. Fish passage-spawning channel under item 1, characterized in that the initial part of the bottom sills located in the same transverse section.

3. Fish passage-spawning channel under item 1, characterized in that the initial part of the bottom sills located in different transverse cross-sections, and in the most remote cross-section placed the initial part of the bottom threshold imposed in the stream.

4. Fish passage-spawning channel under item 1, or 2, or 3, characterized in that the end sections of the curved bottom sills in the area of the input tip is made flooded.

5. the taxes in the area of the input tip is made unflooded.

6. Fish passage-spawning channel according to any one of paragraphs.1-5, characterized in that the height of the curved thresholds are made different, decreasing downstream watercourse.

7. Fish passage-spawning channel according to any one of paragraphs.1-6, characterized in that the non-pressure face curved rapids made with G-shaped visors, forming additional offline channels.

8. Fish passage-spawning channel according to any one of paragraphs.1-7, characterized in that the bottom of offline channels formed by the side walls curved rapids, made with a mark below the lower end of the rapids.

9. Fish passage-spawning channel on p. 8, characterized in that the bottom of the Autonomous channels are rectangular in shape.

10. Fish passage-spawning channel on p. 8, characterized in that the bottom of the Autonomous channels are triangular in shape.

11. Fish passage-spawning channel on p. 8, characterized in that the bottom of the Autonomous channels are ovoidalnaya form.

 

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