JP3030791U - Fishway block - Google Patents

Abstract

(57) [Abstract] [Problem] To provide a fishway block that allows a fish to easily ascend and descend a river to create a rich natural landscape and to secure a sufficient depth for the fish even in the event of a drought. SOLUTION: A water reservoir 1 is provided on the top end surface of a block main body A laid in a staircase on the riverbed, and a natural stone 2 is adhered and fixed to the front top end surface of the water reservoir.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a block for fishway construction, which is installed in a river so that fish can easily go up and down.

[0002]

[Prior art]

 Conventionally, a uniform staircase type fishway was added to a part of the cut surface for the drop construction that was installed for the purpose of stabilizing the river.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional fishway, there is a problem that it is difficult for fishes to find the way up when going up, or in a river where the Mio muscle is unstable, the way up is buried in the sand and cannot go up. The present invention has been proposed in view of the above problems of the prior art. The purpose of the present invention is to make a fishway block that allows fish to easily go up and down rivers, preserve a rich ecosystem and create a beautiful landscape. Is in the point of providing.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the fishway block according to the present invention is provided with a water reservoir on the top end surface of the block body that is laid in a stepped manner on the riverbed and at the front of the water reservoir on the top end surface of the block body. It is constructed by adhering and fixing natural stones to form non-overflow areas.

[0005]

[Embodiment of device]

 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention shown in the drawings will be described. A is a concrete fishway block body, which has a slope approximately equal to the slope of the river bed to be laid, and a flat surface on the top end surface of the block main body A, which is almost similar to the top end surface of the main body A, is watertight. A water reservoir 1 having high properties is provided, and a natural stone 2, a pseudo stone or the like is bonded to the front of the water reservoir 1 in the block body with an adhesive to form a non-overflow portion a. The natural stones 2 are arranged in a plurality of stages at a required height as needed.

The natural stones 2 are arranged in front of the water reservoir 1 in the total length of the water reservoir 1, a half length thereof, or three types of blocks not provided at all. In the figure, 3 is an anchor bar and 4 is a block connecting fitting. Thus, as shown in FIG. 6, the non-overflow part B of the natural stones 2 and the overflow part C without the natural stones 2 in each fishway block body A are located linearly along the water flow direction of the river, respectively. Further, the fishway block main body A is arranged in the river so that the non-overflow portion B and the overflow portion C are alternately positioned in the direction perpendicular to the water flow direction. By selecting so that the non-overflow part B and the overflow part C are alternately located, a fishway where fish can easily go up and down is constructed, and the natural stone 2 provides a beautiful natural landscape.

Further, by arranging the blocks A with a head, the head per stage becomes small even when the block laying gradient is relatively steep. Furthermore, by changing the combination of blocks, the arrangement of the overflow and non-overflow parts is changed, and the optimum flow according to the flow rate can be obtained, and the shadow of the natural stone 1 that constitutes the non-overflow part is small fish. A hide-and-seek place is provided for you. Furthermore, the water reservoir portion 1 ensures the water depth even when the flow rate of the river is small.

[0008]

[Effect of device]

 Since the fishway block according to the present invention is constructed so as to be laid in a river with a stepped head, even if the laying gradient of the block is relatively steep, the height of the head per step is small and the fish There is no hindrance to the run up. In addition, since a water reservoir is provided on the top surface of the block, the depth of water is secured and the habitation of fish is not hindered even when the flow rate is low.

Further, the non-overflow portion is formed by adhering and fixing the natural stones in the block body, and a beautiful natural landscape is maintained. In addition, the shadows cast by this natural stone provide a good hiding place for fish. Furthermore, by changing the combination of a plurality of types of blocks, which are distinguished by the arrangement state of the natural stones, the arrangement of the overflow and non-overflow portions changes, and an optimum flow according to the flow rate can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a fishway block according to the present invention.

FIG. 2 is a side view of the fishway block.

FIG. 3 is a front view of the fishway block.

FIG. 4 is a plan view of the fishway block.

FIG. 5 is a rear view of the fishway block.

FIG. 6 is a plan view showing how the fishway block is laid.

7 is a vertical side view of FIG.

[Explanation of symbols]

 A Fishway block main body B Non-overflow part C Overflow part 1 Water reservoir part 2 Natural stone 3 Anchor muscle 4 Block connecting metal fittings

Claims (1)

[Scope of utility model registration request] 1. A non-overflow part is provided by providing a water reservoir on the top end surface of a block main body laid in a staircase on the riverbed surface, and adhering and fixing a natural stone in front of the water reservoir part on the top end surface of the block main body. A fishway block characterized by being formed.