Fish passage-spawning channel

 

The invention relates to hydraulic structures designed to pass fish producers through retaining structures for spawning and feeding. Fish passage-spawning channel includes a feeding path, the head part which is attached to the upper downstream of the barrage, and the mouth part with the lower water, made in the form of a channel with a cross section of polygonal shape, the elements of the enhanced roughness and natural vegetation, tiered located on the floodplain and channel parts of the cross section of the channel. Channel water conveyance path executed in length with two different cross-sections: the first of which - with the Central channel part, located between the two floodplain parts, and the second with two channel portions connected to the Central part of the floodplain located along the Central longitudinal axis of the channel, and interfacing with multiple bottom two variants of the cross-section of the channel sections, connecting the bottom of the bed part and the bottom of the bottom parts of a variant of the cross-section of the channel, respectively, with the bottom floodplain side and bottom channel portions of another variant of the cross-section of the channel. The invention provides sozdaniya its total length. 5 Il.

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], which includes a gateway controller, located in the head part connected with the upper tail-water, water conveyance path that connects the head part with the mouth part and the bottom water, and the elements of the enhanced roughness, placed on the bottom of the channel along its length.

The disadvantage of this construction is the lack of uniform conditions for spawning of fish living near the bottom and in the surface horizons of the stream.

The closest in technical essence and the achieved result is fish passage-spawning channel [2], including water conveyance path, the head part which is attached to the upper downstream of the barrage, and the mouth part with the lower water, made in the form of a channel with a cross section of polygonal shape, the elements of the enhanced roughness and natural vegetation, tiered located on the floodplain and channel parts of the cross section of the channel.

The aim of the invention is the creation of effective hydraulic conditions for fish passage in the tract to absorb the kinetic energy of the flow to reduce the total length of the channel.

The invention consists in the following.

By forming composition of fish passage tract in the form of sections of channel with polygonal cross-section and mating sites manage to combine the channel length two variants of the cross-section: first - with the Central channel part, located between the two floodplain parts, one with two channel portions connected to the Central part of the floodplain located along the Central longitudinal axis of the channel. Interfacing areas allow the pair of bottom two variants of the cross-section of the channel through the device of slanting walls and a sloping bottom. Thanks to the device along the length of the channel interfacing multiple sites can significantly reduce the length of the fish pass path (channel) through the generated hydraulic resistance to the flow passing through the water conducting parts of fish passage-spawning channel.

The flow, getting on mating area, experiencing the simultaneous impact of a planned contraction (expansion) and vertical expands the on pressure in the area of the connecting section is a change of the water level and accordingly the fillet area creates a current difference between two adjacent sections of the channel, having different cross-sectional shape. Multiple mating sections, that is, changes in the length of the channel, allows for constant slope of its bottom, considerably reduce overall channel length (20-25%). This created the difference is such that the magnitude of the flow velocity in the cross section is slightly higher than the average flow rate occurring in areas of the channel between the mating parts. In addition, the generated differential allows the fish to overcome this speed barrier and overcome it, to continue to progress in the direction of the upstream.

In addition, during the reform of the flow is re-planned plot flow, this creates mnogopredmetnaja (beogradjanka) plot with a wide range of flow rates, in response to which, the fish has the ability to select the most favorable high-speed sections to further his advancement in the direction of the upstream.

The solution of this problem is achieved by creating a new design tract of fish passage fish passage-the spawning channel. Graphic material explaining the new design solution presented in the following figures:

Fig.1 - fish passage-spawning part, connected with two floodplain parts;

Fig.3 - cross section b-B, option polygonal cross-section channel with the Central part of the floodplain that is connected to the two channel parts;

Fig.4 - slice fish pass circuit interfacing section, isometric;

Fig.5 - interfacing section, isometric.

Fish passage-spawning channel includes water conveyance path 1, the head 2 of which are connected with the upper tail of the waterworks, and the mouth part 3 - bottom downstream, made in the form of a channel with a cross section of polygonal shape, the elements of the enhanced roughness 4 and natural vegetation 5, tiered located on the floodplain 6 and channel 7 parts of the cross section of the channel. Channel water conveyance path 1 is executed in length with two different cross-sections: the first of which - with the Central channel part 7 located between the two floodplain portions 6, the second with two channel portions 7 connected to the Central part of the floodplain 6, located along the Central longitudinal axis of the channel, and interfacing with multiple bottom two variants of the cross-section of the channel sections 8, connecting the bottom of the bed part 7 and the bottom of the bottom parts 6 a variant of the cross-section to the channel.

Fish passage-spawning channel works as follows.

Attracting fish from the downstream of the mouth portion 3 fish passage-the spawning channel is performed by applying the flow from the upper water for water conveyance path 1. Fish, created in response to hydraulic conditions, actively moves to the input end and entering the mouth portion 3, into the channel, where it spawns in the presence of favorable conditions, or overcoming water conveyance path 1 and the head part 2, comes out in the upper water for further promotion to spawning or feeding. Channel water conveyance path 1 is executed in length with two different cross-sections: the first of which - with the Central channel part 7 located between the two floodplain portions 6 (Fig.2), the second with two channel portions 7 connected to the Central part of the floodplain 6, located along the Central longitudinal axis of the channel (Fig.3), and with multiple interfacing the bottom two variants of the cross-section of the channel sections 8, connecting the bottom of the bed part 7 and the bottom of the bottom parts 6 a variant of the cross-section of the channel, respectively, with the bottom of the floodplain portion 6 and bottom channel portions 7 of another embodiment of a transverse scenepalace elements enhanced roughness 4, made in the form of parallelepipeds. In addition, the contribution to the damping of the excess energy of the flow makes a hydraulic phenomenon called the kinematic interaction effect gravity flow channel 7 and floodplain 6 parts of the cross section of the channel. When the interaction of the flow channel 7 and floodplain 6 parts on channel 1 there is a significant decrease in the mean and superficial flow velocities in the bed part 7 under the influence of stream floodplain part 6, riverine compartment stream floodplain part 6, as a rule, there is some increase in velocity.

The presence of natural vegetation in riparian areas 6 creates the opportunity for spawning phytophilous fish. In addition, due to the polygonal cross-sectional shape of channel 1 on floodplain areas 6 stream has a temperature higher than riverbeds 7, which also contributes to the choice of fish as areas move along the length of the feeding path 1, and places for spawning.

Due to the formation of fish passage duct in the form of two variants of the channel with different polygonal cross-section and connecting sections 8, connecting the bottom of the bed part 7 and the bottom of the bottom parts 6 a variant of the cross-what about the section of the channel (Fig.4 and 5), manage to combine the channel length two variants of the cross-section: first - with the Central channel part 7 located between the two floodplain portions 6, the second with two channel portions connected to the Central part of the floodplain 7, located along the Central longitudinal axis of the feeding path 1. Interfacing sections 8 allow the pair of bottom two variants of the cross-section of water supply path 1 through the device of slanting walls and sloping seabed. Thanks to the device along the length of the feeding path 1 multiple mating sections 8 can significantly reduce the channel length due to the generated hydraulic resistance to flow through fish passage-spawning channel. The flow, getting on interfacing section 8, experiencing the simultaneous impact of a planned contraction (expansion) and vertical expansion (contraction), while due to the reorganization of both scheduled and vertical plots of velocity and velocity head in the area of the connecting section 8 there is a change of the water level and, accordingly, interfacing section 8 generates the estimated difference between two adjacent areas of water supply path 1, performed with different the and, allows for constant slope of its bottom to significantly reduce the total length of water supply path (about 20-25%). This created the difference is such that the average flow velocity in the cross section is slightly higher than the average flow rate occurring in areas of the channel between the connecting areas 8. In addition, the generated differential allows the fish to overcome this speed barrier and overcome it, to continue to progress in the direction of the upstream.

In addition, during the reform of the flow is re-planned plot flow, this creates mnogopredmetnaja (beogradjanka) plot with a wide range of flow rates, in response to which, the fish has the ability to select the most favorable high-speed sections to further his advancement in the direction of the upstream.

Sources of information

1. USSR author's certificate No. 1562397, E 02 In 8/08, op. BI No. 17, 1990.

2. Certificate of utility model No. 13806, E 02 In 8/08, op. BI No. 15, 2000.

Claims

Fish passage-spawning channel, including water conveyance path, the head part which is attached to the upper tail of the waterworks, and mouth tea roughness and natural vegetation, tiered located on the floodplain and channel parts of the cross section of the channel, wherein the channel water conveyance path executed in length with two different cross-sections: the first with the Central channel part, located between the two floodplain parts, and the second with two channel portions connected to the Central part of the floodplain located along the Central longitudinal axis of the channel, and interfacing with multiple bottom two variants of the cross-section of the channel sections, connecting the bottom of the bed part and the bottom of the bottom parts of a variant of the cross-section of the channel, respectively, with the bottom floodplain side and bottom channel portions of another variant of the cross-section of the channel.



 

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