JP3448769B2 - Upstream waterway - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a run-up waterway provided with a priming waterway for guiding fish to a fishway. 2. Description of the Related Art Conventionally, a fishway that allows a fish to run upstream even when a river fish encounters an obstacle such as a natural waterfall, a weir, or a dam, and a priming waterway that guides the fish to the fishway have been separated. 2. Description of the Related Art A run-up waterway of an installed form is known. As shown in FIG. 4 (see Japanese Patent No. 2717490), for example, a well-known run-up water channel A of this type is provided with a fishway A and a priming water at an inclined flowing water portion D between an upstream flat portion B and a downstream flat portion C. In the form of laying in parallel with and adjacent to the water flowing direction E, the fish is laid in the downstream flat part C by the rapid flowing water 1 in the priming water flowing channel B in the direction of the fishway A. , The other fishway block 2 and the slow speed running water 1 in the fishway I formed by the laying of the fishway 1 are detected, and the entrance 11 is found.
The fishway A laid in the inclined flowing water section C runs upstream and reaches the upstream flat section B. The upstream waterway A has a configuration in which a fishway I and a priming headway B are laid in parallel, and the size of the fishway A is large enough to allow a large fish, such as salmon or trout, to rest and run up. It is preferable to be adopted for a wide river or the like because the laying area is required. [0003] However, when the above-mentioned upstream canal is adopted for a narrow river, it infringes on the width of the river, thereby offsetting the original meaning of the river.
In addition, when an attempt is made to adopt a detour dedicated to running up (a gutter formed by excavating and forming a riverbank), a wide riverbank is required, so that there is a limit on a place where the riverbank can be laid. [0004] The present invention has been made in view of the problems of such a conventional run-up water channel, and can be laid in a narrow area. In addition, a curing area (or a rest area) required for fish to run upstream. Region).
It is an object of the present invention to provide a run-up waterway that forms an effective waterway for small fish including fry. [0005] The upflow waterway of the present invention is:
In order to achieve this object, a narrow flow path formed by a U-shaped cross-section block is fixed so as to cover a part of the upper surface of a wide flow path formed by laying a square block in a step-like manner. in setting the run-up canals,桝型block, its
A notch is provided on one side of the side wall, a step is provided on the front wall with the rear wall, and the other U-shaped block is
It has a locking strip protruding near the front and rear of the lower outer surface, and has one side of the U-shaped cross-section block positioned in the cutout of the square block, and the U-shaped cross-section block. Of the U-shaped cross section block is positioned on the inner surface of the upper end of the front wall of the block. The run-up water channel provided with the above-mentioned solution means, the narrow flow channel is superimposed on the wide flow channel to reduce the width of the water channel, and the narrow flow channel is also used for guiding the fish to the fishway and upstream of the small fish. In addition, the flowing water area of the overlapping portion in the wide flow path is used as a curing area (or a rest area). BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a water flowing-up channel according to the present invention. FIG. 1 is a plan view of a run-up water channel A constructed on the shore of an inclined flowing water portion D between an upstream flat portion B and a downstream flat portion C in a wide river. The run-up channel A has a large number of square blocks 1, 1, which are sequentially buried along the slope of the inclined flowing water section D, and a large number of U-shaped cross-sectional blocks 2, 2, which are narrower than the square block 1. The U-shaped cross-section block 2 is a square block 1 of the inclined flowing water section D.
It is attached near the upper shore. In the upstream water channel A, the water flowing from the upstream flat portion B is supplied to the square blocks 1, 1
Flows down through the flow path E and the flow path F of the U-shaped cross-section type blocks 2, 2, and reaches the downstream flat portion C through the flow path entrances E1, F1. The gravel and rubble indicated by reference numerals 4 and 4 are:
The buried block 1 and the U-shaped section block 2 are buried in a partially exposed state at the respective bottoms to create a natural riverbed and promote the settlement of moss. FIG. 2 is a side view of the run-up water channel A shown in FIG. 1. In the inclined flowing water portion D between the upstream flat portion B and the downstream flat portion C, a large number of square blocks 1, 1 are stepwise. Buried in
Moreover, a large number of U-shaped cross-section blocks 2 are provided above these,
2 are arranged in a row so as to be inclined, and each of the flow paths E and F is configured. FIG. 3 is a partial longitudinal sectional view showing an example of a combined structure of the square block 1 and the U-shaped sectional block 2 for forming the upstream channel A shown in FIGS.
FIG. 5 is a partial cross-sectional view of the same. The square block 1 adopted here has a front wall 11 and a rear wall 12.
A step h is provided to achieve fitting with the U-shaped cross-section block 2.
Therefore, a notch 111 is provided on the shore side wall. The other U-shaped cross-section block 2 has two locking strips 211 formed to protrude near the front and rear sides of the lower outer surface 21 thereof,
212, and the shore side of the U-shaped sectional block 2
The side portions are located at the cutouts 111 of the square block 1, and the respective locking strips 211 of the U-shaped cross-sectional block 2,
212 is located on the inner surface of the upper end of the front / rear walls 11 and 12 of the square block 1, and the U-shaped cross-section block 2 is fitted and set in the square-shaped block 1. It does not easily leave block 1. The illustrated fish bed block (refer to the dotted line) 3 is settled or attached so as to form a U-shaped space in the lower part of the square block 1, and is a cured water area required for fish to run up ( Or
It is also called a rest area, and is hereinafter referred to as a “cured water area”. ), And gravel and rubble 14 are attached to the upper surface thereof. In the upstream running channel A, since the flow rate of the square blocks 1 and 1 in the flow path E is obstructed by the square blocks 1 and 1, the U-shaped cross-section block 2 without obstacles is used. 2
A part of the square block 1, which is covered by the U-shaped cross-section block 2 and in which the inflow of water is blocked, is slower than the flow rate in the flow path F. It provides a healthy water area that is a natural watershed and a good resting place. Next, with reference to FIGS. 1 and 2, a description will be given of the fish ascending state via the ascending water channel A having the above-described structure. The flowing water from the upstream flat portion B is divided into the flow path E of the square blocks 1 and 1 and the flow path F of the U-shaped cross-section blocks 2 and 2 in the upstream channel A and flows down to the downstream flat portion C. There is a difference in the flow velocity of each of the flow paths E and F, and the downstream flat portion attracted to the flow path entrances E1 and F1 by the water flowing down from the flow path F of the U-shaped sectional blocks 2 and 2 having a high flow velocity. The fish on the C side senses the slow flow in the flow path E of the other square blocks 1 and 1, and the entrances E1 and F1 of the flow paths E and F.
And will go upstream. A small fish with a strong run-up force goes up both the flow paths E and F, but a small fish with a poor run-up force goes up to any square block 1 forming the flow path E, The channel E is moved up while recovering the run-up force in the curing water area in the square block 1. On the other hand, in the case of a channel F having a shallow depth, a large fish is unlikely to go up and goes up the channel E. It goes up to the basin block 1 and goes up the flow path E while recovering the upflow force in the curing water area in the basin block 1. As mentioned above, although the embodiment of the run-up waterway of the present invention has been described in detail, the present invention is not limited to the above-described embodiment, and departs from the spirit of the present invention described in the claims. Various changes can be made in the design without any change. In the embodiment of the present invention, the flow path formed by the U-shaped cross-section block is described as being formed on the upper surface side of the flow path formed by the square block, but is formed at the center of the upper surface of the flow path. Or 2
Although the U-shaped cross-section block provided with the locking strips and the M-shaped block are described as being combined, the M-shaped block and the U-shaped cross-section block are, for example, small holes formed in the U-shaped cross-section block. After inserting the bolts planted in the cutouts of the square block, the nuts may be connected by tightening nuts. Means for connecting these may be appropriately considered. Furthermore,
For example, in FIG. 2, a U-shaped cross-section block having rhombic side surfaces is employed, but a U-shaped cross-section block having a square side surface with no particular difference in function may be applied, and the material of each block is Not only concrete but also steel, synthetic resin, etc. can be adopted. As is apparent from the above description, the run-up channel according to the present invention is constructed by a square block or a U-shaped block having a fixed size and shape. The required structure was completed by the work.
Further, the run-up water channel of the present invention has a structure in which a flow path formed of a U-shaped cross-section block is superimposed and fixed on an upper surface of a flow path formed of a wide square block capable of securing a deep water depth. It is extremely effective in places where the construction area is limited, such as when the river is formed in a natural river or when the river is formed around the riverbank, and it is possible to obtain an exceptionally well-cured water area.
Regardless of the size, the degree of fatigue, etc., all fish were able to run up.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a run-up waterway according to the present invention. FIG. 2 is a side view of the upstream waterway shown in FIG. 1; FIG. 3 is a partial longitudinal sectional view showing a combined structure including a square block and a U-shaped sectional block for forming the upstream waterway shown in FIG. 1; FIG. 4 is a plan view showing a conventional run-up channel. FIG. 5 is a cross section for forming a run-up water channel shown in FIG. 1;
Combination structure consisting of a block and a U-shaped section block
FIG. [Description of Signs] A Upstream Water Channel B Upstream Flat Portion C Downstream Flat Portion D Inclined Flow Portion E Wide Channel F Narrow Channel 1 Measuring Block 2 U-Shaped Block 3 Fish Bed Block

Claims (1)

(57) [Claims 1] Regarding a run-up water channel constructed in an inclined flow section of a river, a part of the upper surface of a wide channel formed by laying a square block in a stepped manner is used. In a run-up waterway in which a narrow flow path formed by a U-shaped cross-section block is fixed so as to cover, the square block has a notch on one side of a side wall thereof. There is a step on the front wall and the rear wall, and the other U-shaped cross-section block is
The U-shaped block is provided with a locking strip protruding in the vicinity of the rear, and one side of the U-shaped cross-section block is positioned in the notch of the M-shaped block. A run-up waterway characterized in that a U-shaped cross-section block is fitted and installed in a square block, located on the inner surface of the upper end of the front wall of the mold block.