KR20230097321A - improved river weir fishway - Google Patents

Abstract

The present invention is an improved type that secures a slow flow rate, a low inclination angle, and a sufficient and constant flow rate so that fish species lacking swimming ability can easily move based on a fishway structure having one or more rotational sections when a fishway, which is an ecological passage, is installed in a river weir. It's about fish.
That is, considering various ecological habits, it is characterized by providing a structure and environment suitable for entering, leaping, and dying regardless of swimming ability according to fish species.
In addition, as there are many situations in which the previously installed fishway does not function properly and the repair is not carried out smoothly, the improved fishway enables additional installation without removal of the existing fishway installed on the weir, thereby improving the repair work of the fishway. It helps fisheries to function as natural ecological pathways.

Description

Improved river weir fishway

This technology is related to a fishway installed in a river weir. Specifically, it relates to a fishery that enables the smooth use of aquatic organisms by securing a slow flow rate and a constant flow rate when installing a fishery, which is a structure that secures an ecological passage for fish by connecting the upper and lower streams of a river.

A fishway is a waterway or device made for the purpose of animals, including fish, whose movement is restrained by hydraulic structures that block rivers. In other words, it is to artificially install fish movement passages to help preserve fish species or spread fish distribution.

Since the introduction of the US ice harbor type fishery in Korea, ice harbor type fishermen have been installed in many domestic rivers. However, there is a problem that domestic river fish cannot use the fish harbor because the ice harbor type fishery made to help the movement of large fish in the United States has a fast flow rate.

In addition, existing domestic fisheries in various forms, such as ice harbor types and stairs, have steep slopes and fast flow rates due to their short length and narrow width, and do not secure a flow rate above a certain level, so domestic river fish do not use them. can not do it. In particular, in case of a flood, the function of the fishery does not work, so it is not possible to use the installed fishery, and there are many cases in which fish die en masse in the lower reaches of the river.

In the case of a fishery that is incorrectly installed or poorly managed, it rather blocks the movement of fish, so it is necessary to repair the fishery. However, there is a problem in that the repair of the installed fishery is not performed smoothly due to the complexity and cost of the process of reconstructing the outlet and inlet extensions or changing the internal standard form or demolition during the renovation process.

KR 10-1660462 Y1 KR 10-089487 A1 US 2017/0138008 Y2

An object of the present invention is to provide a fishery having a structure that secures a low flow rate and a low slope that enables fish to move and a constant flow rate.

In addition, an object of the present invention is to provide an improved fishery that can smoothly repair and repair the fishery without removing the fishery through the improved fishery that can be additionally installed in the existing fishery.

The improved fishery of the present invention has a length that secures a gradient of about 1/25 or less for a low flow rate and one or more rotational sections. In order to ensure smooth entry of fish into the ecological passage of the outflow part connected to the river inlet where fish enter, the drop from the river inlet is maintained at about 5 cm or less. It has a structure that secures a depth of about 30 cm or more in the inlet tank to secure a flow rate of at least a certain level for the smooth movement and jump of fish in the fishway, and a structure that secures a depth of about 60 cm or more on one side of the fishway and the rotation section.

In the case of the inlet where river water flows from the upper stream of the river through the weir, if there is an existing fishway, connect it to the inlet of the existing fishery. If there is no previously installed fishway, it is connected to the top of the weir through which the river water flows into contact with the upper stream of the river. In addition, the improved fishway includes a structure having a temporary resting tank having a bottom surface lower than the bottom surface of the rotation section in the rotation section of the fish passage to provide a resting space for fish using the fish passage.

The present invention has a structure that secures a slow flow rate, a low slope, and a flow rate above a certain level, and provides an environment and structure sufficient for various fish to eat regardless of dry season and feng shui, so that even small fish can be easily picked through the fishery. It works.

In addition, the present invention is an improved fishery that can be additionally installed in the existing fishery, and has the effect of enabling the smooth ecological passage of fish in domestic rivers by improving the fishery that is not functioning properly because the renovation is not performed.

1 is a perspective view of a city according to an embodiment of the present invention;
Figure 2 is a perspective view of a river weir, a previously installed fishway, and an improved fishery according to an embodiment of the present invention.
Figure 3 is a perspective view of a river weir without a previously installed fishway and an improved fishery according to an embodiment of the present invention.
4 is a depth and height detail view of a portion of a fishery area according to an embodiment of the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The figures shown in the drawings accompanying this specification are not measured values and are shown for convenience of understanding of the present invention.

Figure 1 is a perspective view of a fishway according to an embodiment of the present invention, Figure 2 is a perspective view of a river weir and an existing installed fishery and an improved fishery according to an embodiment of the present invention, Figure 3 is a river weir and an embodiment of the present invention 4 is a detailed view of depth and height of a portion of a fishery area according to an embodiment of the present invention.

As shown in Figures 2 and 3, the road 2 according to the embodiment of the present invention is installed on the river weir 1 and can be constructed regardless of the presence or absence of a previously installed fishway structure 3.

In the improved adobo (2) of the present invention, it is intended to achieve a low flow rate, a low slope, and a certain level of flow rate. Therefore, as shown in FIG. 1, the flow rate is secured slowly through one or more rotation sections 21 so that various types of fish can easily go up the fishery.

The improved fishery has a length that secures a slope of 1/25 or less to secure a slow flow rate. In Fig. 1 there is shown a diagram of an embodiment of a charter 2 having one rotating part. This is an embodiment for convenience and understanding, and has two or more rotating parts to secure a sufficient length to secure a slope of 1/25 or less, or a structure in which the length of the road extends outside the side 11 of the beam can have Considering the fact that most of the previously installed fisheries (3) are mainly used for large fish species with fast flow rates and steep slopes, the installation of the improved fishery (2) secured with sufficient flow rate, low slope and slow flow rate is suitable for large fish species as well. It can also be an ecological passage for small fish species and small animals.

The improved fishery of the present invention includes a structure having a width 22 of about 40 cm or more to promote the use of various species from small fish to large fish.

The improved fishery (2) of the present invention secures an inflow tank depth (23) of about 30 cm or more to secure an inflow flow rate above a certain level in order to make fish jump more easily in the ecological passage by securing a flow rate above a certain level has a structure that Through this, a depth of a certain level or more is secured to prepare a sufficient flow rate for fish to jump and move within the fishway 2.

In the wind water season, due to the flow rate exceeding the depth 23 of the inlet tank of the fish passageway, river water overflows beyond the depth 23 of the fish passageway, and the flow rate may be lost. Therefore, in order to maintain a flow rate above a certain level, a wall 24 is installed on the side so that a depth of about 60 cm or more is secured on one side of the fishway close to the river core or in the rotation section 21 to prevent loss of water to achieve a higher height to reduce flow loss. 4 shows depth and height details of a portion of a fishery area according to an embodiment of the present invention. In particular, in the case of the rotation section 21, it may be lost to the outside of the fishery under the influence of the flow speed while the current rotates, and this is prevented by designing the outer height 24 of the rotation section to about 60 cm or more.

2 shows a view in which an improved fishway 2 is constructed when there is a previously installed fishway 3 in a river weir according to an embodiment. In the case of the improved roadway 2 of the present invention, when the roadway 3 is previously installed, the newly installed improved roadway 2 has the above-described 1 area in the area of the beam 1 excluding the area of the previously installed roadway 3 It is installed with a slope of less than /25 and a length that secures one or more rotational sections. Through this, if there is an existing fishery 3, it is possible to install an additional fishery 2 for improving the function of the fishery. If the slope is not secured, the length of the improved fishery continues outside the side 11 of the beam on the side where the beam 1 is not installed, so that a sufficient length can be secured. Through this gentle slope, it is possible to facilitate the movement of fish by securing the maximum flow rate in the fishway, which is slower than the rushing speed of fish, by securing a flow rate of 0.5 m/s or less, which is slower than the flow rate of existing fisheries. By appropriately adjusting the flow speed through a low slope, small fish species in domestic rivers can easily move through the fishway (2), and by preventing a lot of water from pouring with a large drop, fish can move upstream with their inherent swimming ability. help to be

Figure 3 shows a perspective view of a river weir without a previously installed fishway and an improved fishery according to an embodiment of the present invention. Referring in detail with reference to FIG. 3, on the contrary, in the case of the fishway 1 installed in a beam without a previously installed fishway 3, considering the possibility that a fishway can be installed later, about 1 to 15% of the length of the beam Or, it is installed in a structure having a length that occupies part or all of the remaining part after subtracting about 3% of the width of the river reservoir. That is, when the road 3 does not exist in the beam 1, a certain area is excluded as much as there is a possibility that a new road will be installed, and the inlet 27 of the road is installed so that the upper end 12 of the beam is in contact . Through this, in the case of the weir (1) without the previously installed fishway (3), it is possible to arrange another fishery after the installation of the improved fishery (2)

The upper stream of the river exists above the weir (1), and the lower stream exists below the weir. In addition, in the case of existing fisheries in Korea, there was a problem that river creatures could not enter the outlet of the fishery due to a large drop from the river core to the fishery outlet where river water was discharged downstream due to scouring. The outflow part 25 of the improved fishery secures a structure with a drop of about 5 cm or less from the river inlet so that domestic small river fish species can easily jump and easily enter the ecological passage.

In the present invention, a temporary resting tank 26 in which fish can stay for a while is formed in the rotating part of the fishery having one or more rotating parts 21. The temporary resting tank 26 is a puddle having a bottom surface lower than the bottom surface inside the fishway 2, and secures a space where fish using the fishway can rest for a while when using the ecological passage.

In the case where there is no previously installed fishery 3, the improved fishery 2 of the present invention is installed after excluding a certain area where a new fishery is likely to be installed, as described above, and in this process, the improved fishery 2 It is installed so that the inlet 27 and the river water come in contact with the upper end 12 of the beam, which is the starting point for flowing downstream from the upper end of the river.

If there is an existing fishery, the inlet 31 of the existing fishery and the inlet 27 of the improved fishery are connected to secure the remaining water intake through the inlet 31 of the existing fishery. Since the inlet 27 of the improved fishery is connected to the inlet 31 of the existing fishery, the water intake remaining during the dry season flows simultaneously to the improved fishery 2 through the existing fishery, so that sufficient flow rate and flow rate are achieved even in the dry season can be secured In addition, in many cases, existing fisheries were designed based on the remaining water intake during the dry season, so the change in flow rate from March to November was not reflected, and the flow rate in the fishery increased considerably in most of the period, resulting in serious restrictions on fish movement. . As a part of the flow rate flows into the improved fish passageway (2), the flow rate is appropriately adjusted to secure the flow rate planned by the existing fish passageway (3), improving the function of not only the improved fishery (2) but also the previously installed fish passageway (3) . When installed additionally to the previously installed fishway (3), even if the existing fishery is damaged in the summer when precipitation is concentrated throughout the year, the additional fishway (2) exists to provide an ecological pathway for anadromous and anadromous organisms. can keep

[Example]

In the case of Example 1, when there is a previously installed fishway in the river weir, it refers to a case where the area of the previously installed fishway is excluded and installed. In this case, the area where the previously installed fishway is excluded is newly installed to secure a gradient of 1/25 or less and one or more rotational sections. In addition, the inlet of the improved fishery is connected to the previously installed fishery.

In the case of Example 2, it refers to a case in which an improved fishway is installed in a riverweir in a state where there is no previously installed fishway in the riverweir. In this case, the fishway is installed to include the length that occupies part or all of the remaining part after subtracting about 1 to 15% of the length of the beam or about 3% of the width of the river reservoir. The inlet of the improved fishway has a structure that connects to the upper end of the beam that is in contact with the upper stream of the river.

The present invention can be used for fishery construction and fishery renovation.

(1)-- Stream Weir (11)-- Side of Weir (12)-- Top of Weir
(2)-- Improved type of fishery (21)-- Rotating section
(22)-- width (23)-- depth
(24)-high wall (25)-outlet
(26)- Temporary resting tank (27)- Inlet
(3)--Existing Fishway (31)--Existing Fishway Inlet

Claims (5)

In the fish 2 installed on the fixed weir 1 to allow organisms to move, a length securing a slope of about 1/25 or less for a slow flow rate, one or more rotation sections 21 for adjusting the flow rate, A structure that secures an outlet (25) through which river water with a drop of about 5 cm or less is discharged downstream, and an inflow water tank depth (23) of about 30 cm or more to secure flow rate, and existing in the weir A fishway including an inlet 27 connected to the upper end of a fishway or beam installed in and into which river water flows in The fishway according to claim 1, comprising a structure (24) that secures a depth of about 60 cm or more on one side of the fishway (2) close to the river channel or in the rotating section (21) to prevent water loss. The method according to claim 1, fishery comprising a structure having a temporary resting water tank 26 having a bottom surface lower than the bottom surface of the rotating section The fishery according to claim 1, comprising a width (22) of about 40 cm or more for the use of various species. The method according to claim 1, in the case of the passage (2) installed in the beam (1) without a previously installed passage, about 1 to 15% of the length of the beam or about 3% of the width of the river reservoir, and a part of the remaining part or A word that includes its full length.

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