JP3017505U - Fish path - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents the slag from being clogged in the submerged hole in the partition wall. [Structure] A plurality of partition walls 2 to 5 are provided in the fishway waterway 1 at arbitrary intervals in the water flow direction, and a submerged hole 7 for moving a bottom water fish is provided below each partition wall 2 to 5 to form the partition walls 2 to 5. Top 2A
In a fishway in which water is allowed to overflow above 5 A, a stone-proof stone wall 8 is provided immediately upstream of the submerged hole 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fishway provided in a dam, a river, a waterway or the like so that fish can run upstream between water surfaces.

[0002]

[Prior art]

 Conventionally, this kind of fishway has multiple partitions at the bottom of the waterway for fishways at arbitrary intervals in the water flow direction, fixed overflow weirs downstream, and float-type ascending / descending gates upstream of the partition walls. In addition, a submerged fish movement submerged hole (orifice) is provided under each partition wall.

[0003]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional technique, even if the submerged hole is large (for example, 30 cm square), there is a problem in that the submerged fish cannot be moved due to the clogs of upstream river clogging the submerged hole. The reality is that I am confused by.

Therefore, it is conceivable to arrange a gate at the fishway waterway entrance, but it is difficult for an operator to reach the fishway entrance because the gate is closed during a flood. The present invention has been made in view of the above situation, and an object of the present invention is to provide a fishway that can prevent clogging of clogs in a submerged hole.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention takes the following technical means. That is, according to the present invention, a plurality of bulkheads are provided in the fishway channel at arbitrary intervals in the water flow direction, and a bottom water fish moving sub-hole is provided at the bottom of each bulkhead so that water overflows above the top of the bulkhead. In such a fish path, a frost-proof stone wall is provided at least upstream of the uppermost stream side of the latent hole. According to the present invention, an overflow gate can be provided on the upstream side or the top end of the partition wall.

[0006]

[Action]

 According to the present invention, the stones flowing from the upstream river are prevented from flowing into the submerged hole by the stone stone wall. Therefore, the burial holes will not be clogged with cobblestones and will not hinder the movement of bottom water fish.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In the drawing, 1 is a fishway channel, the bottom of which, that is, the subgrade 1A has a stepped shape at arbitrary intervals in the water flow direction, and partition walls 2, 3, 4, 5 cross the side walls 1B at the stepped portions, respectively. The fixed overflow weir 6 is provided at an arbitrary interval on the downstream side of the partition wall 5 at the downstream end.

The partition walls 2 to 5 are made of concrete (or may be made of steel), and their top ends 2A to 5A have the same height, and the height of the overflow end 6A of the fixed overflow weir 6 is It is set higher than the partition walls 2 to 5 so that a predetermined overflow water depth can be obtained at the lowest water level on the upstream side. Then, non-overflow piers 2B to 5B are formed at the central portions of the respective partition walls 2 to 5 and the fixed overflow weir 6 in the waterway width direction.

Further, a submerged hole (orifice) 7 is provided in each of the partitions 2 to 5 and below the fixed overflow weir 6, so that bottom-water fish moving upstream along the waterway bottom 1A easily move upstream. A concrete (or steel may be used) stone-proof stone wall 8 is arranged immediately upstream of each submerged hole 7.

The crush stone wall 8 is for preventing the burial hole 7 from being clogged with crushed stone flowing from the upstream river. The size and the distance from the burial hole 7 are the same as those of the upstream river. It is decided according to the quantity and its quantity.

Float type lift gates 9, 10, 11 and 12 are provided on the upstream side of each of the partition walls 2 to 5 so as to automatically move up and down in accordance with the fluctuation of the water level on the upstream side. The gates 9-12 correspond to the non-overflow portions 2B-5B of the respective partition walls 2-5, with the non-overflow floats 13, 14, 15, 16 projecting upstream in the central portion in the waterway width direction. And the overflow ends 9A to 12A are formed on the left and right sides of the floats 13 to 16, respectively.

It should be noted that one or a plurality of the latent holes 7 can be provided at any position in the waterway width direction. In addition, the anti-tarnish stone wall 8 may be provided at least just upstream of the most upstream side latent hole 7, or may be provided on the plurality of partitions 2 and 3 on the upstream side, and the downstream side may be omitted.

According to the above-described embodiment, since the gates 9 to 12 are of the float type, they are driven by the buoyancy of the floats 13 to 16 which move up and down in accordance with the fluctuation of the water level on the upstream side, and are automatically driven with no dynamic force. Up and down to follow the water level, the upstream water overflows from each of the gates 9 to 12 at a constant overflow water depth, and the water depth difference between the upstream and downstream becomes the same.

When the upstream water level reaches the minimum water level, the overflow crowns of the gates 9 to 12 coincide with each other. Therefore, fish can easily go up. Large stones flowing from the upstream river are blocked by the stone-preventing stone wall 8 and do not clog the submerged hole 7, so that bottomwater fish can go up from the submerged hole 7. Moreover, the stones blocked by the stone-preventing wall 8 can be easily pulled up and removed from the water channel bottom 1A.

The present invention is not limited to the above-described embodiment. For example, the overflow gate can be a floating type undulating gate, and can also be used in a fishway without a gate. The fence is not limited to a concrete wall, but can be a fence such as a lattice or net, and the design can be changed as appropriate.

[0016]

[Effect of device]

 As described above, the present invention is provided with an anti-quartz stone wall on the upstream side of the submerged hole. Therefore, it is possible to prevent the submerged hole from being clogged with quarry stones and to exert the run-up function of bottom-water fish. it can.

[Brief description of drawings]

1 is a longitudinal side view showing an embodiment of the present invention (AA in FIG. 2)
FIG.

FIG. 2 is a partially omitted plan view of FIG.

FIG. 3 is a view taken along the line BB of FIG.

[Explanation of symbols]

 1 Fishway waterway 2-5 Partition wall 2A-5A Top end 7 Submerged hole 8 Chest stone wall 9-12 Overflow gate

Claims (2)

[Scope of utility model registration request] 1. A plurality of bulkheads are provided in a fishway channel at arbitrary intervals in the water flow direction, and a bottom water fish moving sub-hole is provided at the bottom of each bulkhead so that water overflows above the top of the bulkhead. In the above fishway, at least an upstream side of the uppermost stream side of the submerged hole is provided with a quarry stone wall. 2. A fishway, wherein overflow gates are provided on the upstream side or the top end of the partition wall, respectively.