JP2003268754A - River activating regenerating method and river activating regenerating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a river activating regenerating method for reviving the function of a river by allowing inhabitation of aquatic life in the river remarkably reduced in water retentivity by laying concrete and rock. <P>SOLUTION: In the river whose riverbed and bank 25 are remarkably reduced in the water retentivity by laying the concrete or stones, a wall surface forms an inclination in the river at a prescribed angle or more, and is composed of a process of arranging a plurality of first water storage means 1 within a prescribed level difference interval so as to form stairs by reaching the other side from one side of the river in the vertical direction, and a process of arranging a plurality of second water storage means 10 within a prescribed distance interval in the horizontal direction in a gentle place of a prescribed inclination or less in the inclination of the riverbed in the river. The respective first water storage means 1 and second water storage means 10 have the sufficient depth for allowing inhabitation of the aquatic life in the water storage means, and allowing jumping to the adjacent water storage means. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a river activity for activating and regenerating the function of a river in which the water retaining capacity of the original river is remarkably lost due to the river bed and the banks of both banks being covered with concrete or rocks. The present invention relates to an activated regeneration method and a river activation regeneration device.

[0002]

2. Description of the Related Art The bed of a natural river is formed by sediment and stones washed away from upstream. When heavy rain causes an increase in water flow, sediment and stones in the riverbed flow downstream, but more sediment and rocks are carried from the upstream and deposited on the riverbed. By repeating this, the riverbed gradually rises, the flow path changes, and when the amount of water increases due to heavy rainfall, flooding and collapse of the bank occur.

In order to prevent such a flood, in recent years,
Especially for small and medium-sized rivers, river rehabilitation work is performed to cover the banks and riverbeds on both sides of the river with concrete. So-called 3
It is called a river with a surface. In particular, many tributaries (so-called small and medium-sized rivers) that flow into the mainstream are covered with concrete or stones. The total basin area of multiple tributaries flowing into the mainstream may be larger than the mainstream basin area. Many tributary rivers have been refurbished to rivers covered with concrete or stone, so if the water dries up without rain for a short period of time, the water retention capacity that the river originally has is significantly lost. ing.

As shown in FIGS. 13 and 14, the three-sided river has a flat or stepped structure in which the river bed is covered with concrete and does not obstruct the flow of water, and the bank forms a revetment wall covered with concrete. is doing.

Further, as shown in FIG. 15, a high step is constructed to prevent the outflow of earth and sand. As a result, the river during the dry season will not be able to inhabit aquatic life because the concrete bed is exposed and there is no water retention. In order to restore the natural environment of these destroyed rivers, concrete revetments and riverbeds are destroyed to remove concrete and return to the condition of the riverbed and banks of the earth and sand, or by laying blocks for river improvement, etc. Repair work is in progress.

Further, as shown in FIG. 16, there is also an example of construction in which rock is laid on a riverbed of concrete surface, but the fact is that it does not contribute to the restoration of the water retention capacity originally possessed by the river. Is.

[0007]

[Problems to be Solved by the Invention] The rivers covered with riverbeds and banks on both sides with concrete as described above destroyed the ecosystem of the river, making it impossible for the aquatic organisms that lived in the river to inhabit. . The riverbed is flat or stepped, and no water storage area occurs when the water is drought. In order to inhabit aquatic organisms, it is necessary to create a reservoir area in the river bed. Further, even in a place where the riverbed of a part of the river is covered with concrete, there is no place for water to collect when the flow of water stops, and there is no water for aquatic organisms to inhabit.

Further, in order to prevent the earth and sand flowing into the river due to rain or the like from flowing out to the downstream, a high concrete sand embankment is provided. For this reason, there is a large step between the river surface in the embankment and the lower riverbed, making it impossible to run aquatic animals such as ayu, salmon, and eel. Furthermore, since it is a concrete revetment wall with a high step and a steep slope, it makes it impossible for animals living in the vicinity to cross the river.

Furthermore, the river covered with concrete is
Since it does not have the purifying action and water retention function of nature, it directly pollutes the sea because muddy water, domestic wastewater, and rainwater go straight to the sea without being purified. It will also cause abnormalities in the marine ecosystem.

At present, in order to protect the natural environment, it is strongly required to restore the environment of the river in which the natural environment is destroyed to the original form. For this reason, work is being done to destroy the concrete facilities created to preserve the river and restore the natural environment. However, this restoration work will take as much time and money as when creating a three-sided concrete river. In addition, there is a problem of waste treatment that destroyed concrete waste is produced as new waste.

Therefore, the present invention provides a water tank which is a river activation regenerating apparatus without destroying a constructed existing cement-three-faced concrete river or a place partially formed by concrete or stone in the river. An object of the present invention is to provide a river activation regeneration method and a river activation regeneration device that creates a water storage area by a simple construction in which a water blocking block is arranged, regenerates the functions of a river, and restores the natural environment.

[0012]

From the above, the present invention is for storing water so that aquatic organisms can live in rivers formed by covering river beds and banks with concrete or rock and having a significantly reduced water retention capacity. In the river activation rejuvenation method of No. 1, in a wall surface where the slope in the river is formed at a predetermined angle or more, a predetermined step is formed so that the stairs are formed from one side of the river in the vertical direction to the other side. In the step of providing a plurality of first water storage means within a step interval, and in a gentle place where the riverbed inclination is equal to or less than a predetermined inclination angle in the river, a plurality of second water storage elements within a predetermined horizontal distance interval. A step of providing a means, wherein each of the first water storage means and the second water storage means has an aquatic organism inhabiting the water storage means and an adjacent water storage means. An outlet is formed in the downstream side wall of each water storage means having a sufficient depth to allow the water to jump into the means and for the stored water to flow into the downstream water storage means. The present invention provides a river activation regeneration method characterized by the above.

In the wall surface where the slope in the river is formed at a predetermined angle or more, the step of forming a water outlet on one side of the upper edge of the bank and the aquatic organisms running up the river A step of determining a possible step between the water storage areas, and a plurality of first steps within a predetermined step interval so as to form a staircase from one side of the river to the other side in the vertical direction based on the step. Of arranging the water storage means, the step of burying an arrangement member for arranging the water storage tank at the arrangement position of the wall surface, and the first water storage means are connected stepwise. And arranging up to the riverbed, and arranging the outlet provided in the first water storage means toward the downstream side.
The water flowing from the upstream is continuously stored in the downstream water storage means by the water storage means, and it is possible to inhabit and run aquatic organisms by creating a continuous water storage area.

Further, in the river where the slope of the bed is gentler than a predetermined slope angle, the second
Determining a position where the water storage means is continuously arranged at a predetermined distance in the horizontal direction, and arranging the second water storage means with the outlet facing downstream. Water having flowed from the upstream side is successively stored in the downstream side water storage means by the arranged second water storage means, and a continuous water storage area is created to enable aquatic organisms to inhabit and run up. I chose

Further, in a place where the riverbed is formed in a step shape in the river, a step of determining whether or not the step of the step is a step in which an aquatic organism can run up, and the step of running up In the case of a step, the step of disposing the second water storage means on the downstream side of the stairs;
The step of arranging the water storage means of the above, and the water flowing from the upstream by the first water storage means and the second water storage means thus arranged is successively stored in the water storage means on the downstream side, and continuously. By creating a water storage area, it was possible to inhabit and run aquatic life.

The first water storage means has a bottom portion,
It is formed of a water stop wall plate standing upright at a predetermined height from the edge of the side of this bottom, and one or a plurality of water flow paths and aquatic creature passages are provided on the upper edge of the water stop wall plate. It is a water tank equipped with an outflow port.

For the arrangement on the wall surface, an arrangement member such as a bolt is buried in an arrangement portion on the wall surface, and one or a plurality of the water storage tanks are provided as hole-shaped arrangement means provided in the water storage tank. Via the mounting member such as the bolt, the wall surface is arranged stepwise on the wall surface.

The water tank is reinforced concrete, or
It is made of concrete with a metal mesh core.

The second water storage means is formed of a bottom portion and a water stop wall plate which is erected as one body at a predetermined height from the edge of the side of the bottom portion, and the upper edge of the water stop wall plate is formed. It is a water blocking block having one or a plurality of outlets as a water flow path and a waterway path.

The first water blocking block is formed of a bottom portion and a water blocking wall plate which is erected as one body at a predetermined height from an edge of one side of the bottom portion, and has the outflow port. It is arranged on the riverbed to create a water storage area where water is retained by the water stop plate.

The second water blocking block is formed of a bottom portion and two water blocking wall plates which are erected as one body at a predetermined height from the edges of the two sides of the bottom portion. It is provided and is provided on the riverbed to form a water storage area where water is retained by the water stop plate.

The third water blocking block is formed of a bottom portion and two water blocking wall plates which are provided as a single body at a predetermined height from the edges of the three sides of the bottom portion. It is provided and is provided on the riverbed to form a water storage area where water is retained by the water stop plate.

The water blocking blocks laid in the river are made of reinforced concrete or concrete with a metal net as a core.

Here, the river activation regeneration device of the present invention is a river activation regeneration device for allowing aquatic organisms to live in a concrete river whose riverbed and bank are formed of concrete. In the wall surface where the slope is formed at a predetermined angle or more,
A plurality of first water storage means within a predetermined step interval so as to form a staircase from one side to the other side of the river in the vertical direction, and the slope of the riverbed in the river is gentle at a predetermined inclination angle or less. In a different place, it is composed of a plurality of second water storage means within a predetermined distance interval in the horizontal direction, and each of the first water storage means and the second water storage means has an aquatic organism. Has a sufficient depth to allow it to inhabit and jump to adjacent storage means, and the downstream side wall of each storage means so that the stored water flows into the downstream storage means. An outlet is formed at.

The first water storage means has a bottom portion, a water stop wall plate standing upright at a predetermined height from an edge of a side of the bottom portion, and water on the upper edge of the water stop wall plate. It is a water storage tank configured with one or a plurality of outlets as a flow path and a path for aquatic life.

Further, the second water storage means has a bottom portion,
A water stop wall plate standing upright at a predetermined height from the edge of the bottom side, and one or a plurality of outlets as water flow paths and passages for aquatic life on the upper edge of the water stop wall plate. It is a water blocking block composed of and.

The first water storage means and the second water storage means are made of reinforced concrete or concrete with a metal net as a core. Therefore, it has the strength and durability to withstand long-term use.

Here, the water storage means is disposed on the river bed of the river formed of concrete or stone, so that the water retention capacity can be restored to the river bed of the river where the water retention capacity has remarkably deteriorated. In addition, the water storage means makes it possible to restore the water retaining capacity to the river by arranging it in a place where the river bed or river bank is partially formed of concrete or stone and the water runs out immediately when the running water disappears. Of.

Thus, the river activation regeneration method using the water storage tank and the water blocking block of the present application does not need to destroy the existing concrete river, and only the water storage tank and the water blocking block are arranged in the river. The water storage area is created by performing simple construction, and the water storage area is established to restore and restore the natural environment.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. Some small and medium rivers have rivers and both banks covered with concrete by flood control work to protect lives, property, and lives from floods. Since the riverbeds of these rivers are concrete, they cannot form a water storage area when drought and aquatic organisms cannot survive. The natural environment is destroyed. The present invention provides a river activation regeneration method in which the natural environment is destroyed and a river activation regeneration device is installed to restore the natural environment.

The method is as follows: the water tank 1 as the first water storage means and the water blocking blocks 10, 15 as the second water storage means.
20 is installed on the bank wall or riverbed with high steps to create a water storage area for survival of aquatic life. Water collects in the water tank 1 and the water blocking block arranged in the river by the flow of the river. Even when the water is short, the water tank and the water blocking blocks 10, 15 and 2
Aquatic creatures can survive in the water and soil accumulated in 0.

FIG. 1 shows a first embodiment of the river activation regeneration method. Aquatic creatures can run up to the cliff wall 28 of the bank 25, which has a large step from the riverbed 27 and a large dip angle to prevent aquatic animals such as ayu, salmon, and eel from running up. The water storage tank 1 is arranged in a stepwise manner along the bank wall 28 from one side of the river to the other side in the vertical direction. This is a method in which the water accumulated in the water storage tank 1 flows out and a staircase-like flow is created one after another to enable the aquatic organism to ascend.

Here, the water storage tank 1 used in the first embodiment will be described. FIG. 2 shows a water storage tank 1 used in the first embodiment.

The water storage tank 1 is formed of a cube or a rectangular parallelepiped having an open upper surface, and has a square or rectangular bottom portion 2 and four wall plates 3 standing upright from the bottom side of the bottom portion 2 at a predetermined height.
And consist of one body. The water tank 1 can also be formed by making slit-like cuts of a necessary width in the riverbed and providing a partition such as a concrete plate at the cut positions.

At the upper edge of one wall plate 3a of the water storage tank 1, an outlet 5 is provided as a water outflow path and aquatic organism passage, which is formed by cutting out a part of the upper edge. The shape of the outlet may be arcuate or U-shaped as long as the aquatic organism can pass therethrough. The outlet 5 is arranged toward the downstream side in the water flow direction. Also, at least 1
The wall plate 3d of the water tank 1
In order to prevent the water from moving due to water flow or flowing earth and sand, one or a plurality of holes 4 for arrangement are formed through which an arrangement member (for example, a bolt) for fixing the water tank 1 to the arrangement place is inserted. ing. As the water storage tank 1 having a proper size is selected and used depending on the place of installation, the water storage tanks 1 having a plurality of sizes are prepared. For example, FIG. 2B shows an example of the water storage tank 1b having a shallow depth. The configuration of the water tank 1b is the water tank 1
The same as the above, and an outlet 5 is provided at the upper edge of the wall plate 3a. One or a plurality of holes 4 for arrangement are formed in the wall plate 3d.

The water tank 1 is made of concrete with a metal net as a core, or reinforced concrete with a steel frame as a core. The strength of the concrete that forms the wall plate 3 and the bottom portion 2 may be any strength that can withstand a water flow and maintain long-term durability. Further, the water storage tank 1 arranged on the erosion control basin by means of arranging members such as bolts.
Must be strong enough not to collapse when it is full of water. In addition, it is necessary that at least the water that has entered the water tank 1 does not leak.

When the dip 25 has a large inclination angle and there is a large step between the upper edge of the sand levee 25 and the riverbed 27 or the water surface, the water storage tank 1 has a predetermined number of water storage tanks 1 along the dike wall 28 in a stepwise manner. There is a case where it is arranged on the riverbed and a case where it is laid on the riverbed 27 at a predetermined interval.

Here, a first embodiment of the present invention in which a predetermined number of water storage tanks 1 are arranged in a staircase on the bank wall 28 will be described. FIG. 1 shows an example in which the water tank 1 is arranged in a stepwise manner from the river bed 27 to the vicinity of the upper edge of the bank 25 along the bank wall 28 having a large inclination angle and a large step.

In order to arrange the water storage tank 1 in a stepwise manner from one side of the river to the other side in the vertical direction along the bank wall 28, a banking formed in a stepwise manner along the bank wall 28, etc. Method of laying the water tank 1 on the foundation of the wall, or arranging it on the wall surface 28 by using an arrangement member such as a bolt inserted in the hole 4 for arranging the water tank 1 on the bank 25 or the bank wall 28. There is.

In the embodiment shown in FIG. 1, the water tank 1
Shows an example in which the wall surface 28 of the bank 25 is arranged by a disposing member such as a bolt which is inserted into the disposing hole 4 of the water storage tank 1. In arranging the wall surface, first, a step is determined according to the upstream ability of aquatic organisms that inhabit the river in which the water storage tank 1 is installed. Based on this determined step, the position to be arranged on the wall surface 28 and the size of the water storage tank 1 to be arranged are determined. Bank 25
A water outlet 25a is formed on one side of the upper edge. The outflow port 25a has a function as a passage for aquatic organisms as water flows out. The outlet 25a determines the height width depending on the aquatic organisms going up. The shape may be a straight concave shape or a semi-arc concave shape as long as the accumulated water flows and aquatic organisms can go up.

On the bank wall surface 28, a bolt as a disposing material is embedded at a position corresponding to the disposing hole 4 provided in the water storage tank 1 at a disposing position where the water storage tank 1 is disposed. The bolts are buried according to the number of the water storage tanks 1 laid on the bank wall 28 in a stepwise manner and the installation holes 4 of the water storage tank 1. That is, bank 25
From the outlet 25a formed in the vertical direction to the riverbed 27 along the wall surface 28 in the vertical direction, the riverbed 27 is continuously buried in a stepwise manner.

The bolt is inserted into the mounting hole 4 provided in the water tank 1 and screwed with a mounting member such as a nut. Similarly, the other water tank 1 is inserted into the bolt for embedding the disposition hole 4 in the sand levee wall 28, and is screwed with a disposing member such as a nut. In this way, the water tank 1 is attached to the bank wall 28 in a stepwise manner. Alternatively, holding the water tank 1 at the position where the bank wall 28 is disposed,
A method may be used in which the disposing member is inserted into the disposing hole 4 of the water tank 1 and the inserted disposing member is driven into the bank wall 28 to dispose.
The upper edge of the uppermost water storage tank 1 is laid so as to be located at a predetermined position of a step where aquatic organisms near the outlet on the upper edge of the bank wall 28 can run upstream. In laying the water storage tank 1, the water tank 1 and the water tank 1 contact the wall plate 3 so that the flow from the upper water tank 1 flows into the lower water tank 1 so as not to interrupt the flow of water. Let me lay it. According to this arrangement method,
There is no need to construct a stair-shaped foundation for mounting the water tank 1. It can be installed by simple construction.

The level difference between the water storage tank 1 and the water storage tank 1 is a level difference of a predetermined height at which aquatic organisms can go up. Determine the height of the step. Due to this step, aquatic life
It is possible to go up while moving from the lower water storage tank 1 to the upper water storage tank 1.

As the water storage tank 1, a water storage tank 1 having a predetermined height and vertical and horizontal widths is prepared so that the water storage tank 1 can be selected from a plurality of sizes of water storage tanks 1 depending on the state of the river in which the water storage tank 1 is installed. deep. Further, aquatic organisms jump on the run to climb a step, but a certain depth of water is required to jump. The depth required for jumping varies depending on the size of the aquatic organism that inhabits. Therefore, a plurality of types of water storage tanks 1 having different depths are prepared and the optimum depth is attached depending on the situation of the place where the water storage tanks 1 are arranged.

Further, in the case of the river bed 27 having a structure in which water does not accumulate on the river bed 27, the water blocking block 10 is laid on the river bed 27 in order to collect the water flowing out from the water storage tank 1 arranged in a stepwise manner on the river bed 27.

FIG. 3 shows another example of the first embodiment shown in FIG. FIG. 3A shows the bank wall 28.
A plurality of water storage tanks 1 are arranged in the vertical direction. In the embodiment shown in the figure, the water that collects in the upper water storage tank 1 and overflows and flows out creates a stream of water that flows one after another in the water storage tank 1 arranged below. When the water flows through the two water storage tanks 1 and 1b, the flow direction of the water is changed downward, and the next two water storage tanks 1 and
When flowing 1b, the direction of the downward flow is changed. In order to configure this flow, the water storage tank 1 has a short length in the vertical direction toward the bank wall 28 in the arrangement combination.
Used in combination. When the arrangement direction of the water storage tank is folded back, the water storage tank in the lower stage does not overlap with the water storage tank in the lower stage so as not to hinder the arrangement.

The direction of water flow at this time is indicated by an arrow.
According to the method of arranging the water storage tank 1, the width of the arranging position vertically arranged on the bank wall 28 is small, and the water tank 1 can be arranged even in a place where the width is narrow. FIG. 3B is a side view of the arrangement position as seen from the arrow Y direction. The side view shows the arrangement position and shape of the water storage tank 1 and the water storage tank 1b arranged at a position where the flow direction is changed. The combination of arrangements of the water tanks 1 and 1b is not limited to the combination of arrangements shown in the embodiment.

Furthermore, in order to create a water storage area and a natural environment in the river bed 27, the concrete river bed 27 and the bank 3
0 at a predetermined interval or continuously with no interval 1
May be provided.

FIG. 4 shows the water tank 1 with a riverbed 27 and a bank 30.
FIG. Water tank 1 to riverbed 27
A continuous pool of water is formed by arranging it continuously on the bank 30. Regarding the arrangement of the water tank 1, the water tank 1 is arranged directly on the concrete riverbed 27 and the bank without destroying the concrete riverbed 27 and the bank. In order to prevent the water tank from moving due to the flow when the water level increases, the bottom of the water tank and the riverbed are fixedly arranged by means of a mounting member such as a bolt. It is also possible to arrange them by bonding with concrete or the like. Reservoir areas will be created on the riverbed and bank, allowing aquatic life to occur.

The number of water storage tanks 1 laid on the riverbed 27,
Depending on the river conditions, the number of intervals may be arbitrarily set so that aquatic organisms can run upstream and the natural environment can be regenerated. When the water level is increased, the water storage tank 1 is in the water flow of the river, and the flowing water stays in the water storage tank 1. When the river is dry, the riverbed 27
Since the water tank 1 arranged in the above is filled with water to form a water storage area and sediment is also deposited, aquatic organisms can inhabit the water tank 1.

Since the conditions such as the aquatic organisms inhabiting, the river topography, and the structure are different, a plurality of types of water storage tanks 1 having different depths and sizes are prepared. According to this method, no work is required to destroy the concrete riverbed. It suffices to arrange a predetermined number of water tanks 1 on the concrete riverbed 27.

The second embodiment of the river activation regeneration method is a method of laying the first water blocking block 10 on a concrete riverbed 27 having a gentle inclination angle. FIG. 5A shows an example in which the first water blocking block 10 is laid on the riverbed. The water stop wall 6 of the first water stop block 10 collects water from the river, forms a water storage area, and deposits sediment. By creating a water storage area, it becomes possible to create an environment in which aquatic organisms can live. FIG. 5B shows a plurality of first water blocking blocks 10.
A cross-sectional view of the river in which the water tank 1 is laid is shown. When the slope of the riverbed is small, the first water blocking blocks 10 are laid at predetermined intervals. The water tank 1 is arranged in a place where the inclination angle is steep and the flowing water pressure is small (a river where the flow rate of water is small and the flow is not steep). A water storage area is formed between the water blocking blocks 10. When there is no flow of the river, a water pool is formed in the vicinity of the upstream side of the water blocking block 10 so that water is retained and aquatic organisms can survive.

First used in the second embodiment of the present invention
As shown in FIG. 6, the water blocking block 10 has a square or rectangular bottom portion 2 and a water stop wall plate 6 standing upright at a predetermined height from an edge of one side of the bottom portion 2. The water blocking block 10 has a substantially L shape. Two outlets 5 are provided on the upper edge of the water stop plate 6 as a flow path for water and a path for aquatic life. 6A shows a perspective view of the water blocking block 10, and FIG. 6B shows a sectional view.

In this water blocking block 10, a water blocking wall plate 6 is arranged on a concrete riverbed 27 in a direction orthogonal to the flow of the river. At the time of drought, the flow of the river is stopped to create a water storage area. As shown in FIG. 5B, this water blocking block 1
A continuous reservoir can be maintained by laying 0 on the riverbed at predetermined intervals. Aquatic organisms can jump from this reservoir and move to other reservoirs.

A plurality of water blocking blocks 10 having a predetermined length are prepared. When the river width is wide, the water blocking blocks 10 should be arranged side by side in the river width direction to connect the water blocking wall plates 6. It may be arranged at. The arrangement of the water blocking blocks 10 may be appropriately determined and arranged depending on the state of the river. In order to prevent the movement due to the flow of the river, it is also possible to provide holes 4 through which the bolts for installation are inserted in the bottom portion 2 or the water stop wall 6 and to dispose them with an installation member such as bolts.

FIG. 7 is a perspective view showing a state where the water blocking block 10 is fixed to the riverbed with bolts 35. 8 is shown in FIG.
2 is a cross-sectional view of the river bed 27 and the water blocking block 10 screwed together with bolts 35 and nuts 36 at the positions indicated by arrows X and Z in FIG. In FIG. 7 and FIG. 8, the water blocking block 10 having the same length as the width of the river is inserted with the bolts 35 embedded in the river bed 27 into the installation holes 4 and screwed with the nuts 36, so that the river bed 27 It is fixed to. Arrangement holes 4 provided in the water blocking block 10 are set to any number depending on conditions such as the size of the water blocking block 10 and the amount of water in the river to be laid. The water blocking block 10 is laid so as not to move due to the water pressure of the river flow.

Further, in a river in which the riverbed 27 is formed in a stepwise manner, a water storage area is formed in the steps of the riverbed. Consider whether or not the steps of the stairs are of such a height that the aquatic organisms expected to inhabit the river to be rehabilitated can run up.

In the case of a step capable of going up, a water blocking block 10 having an outlet 5 is provided at the downstream edge of the stairs on the river bed. The flowing water is dammed by the water blocking block 10 to form a water storage area, and the collected water flows out one after another from the outlet 5 provided in the water blocking block 10.

When the stairs of the riverbed 27 are steps that cannot be run up, the water tank 1 is further arranged between the steps to form a step where aquatic organisms can run up. Arrange. (Shown in FIG. 5B.) The method of disposing the water tank 1 between the stairs is performed by the method described in the above-described first embodiment. In this way, it is possible to inhabit aquatic organisms even on a stepped river bed with large steps.

The third embodiment of the river activation regeneration method is a method of laying the water blocking block 15 on a concrete riverbed. FIG. 9 shows an example in which the second water blocking block 15 used in the third embodiment is laid on the river bed 27.
The second water blocking block 15 includes, for example, the water blocking wall plate 6,
Concrete wall 2 on the riverbank on one side where 7 is not provided
It is arranged on the riverbed 27 so as to follow 6. With this arrangement, the water stop wall plate 6 of the second water stop block 15,
7 can create a water storage area by blocking water. A water blocking block 15 is formed by the water storage area formed by the water stop wall plates 6 and 7.
You can regenerate the natural environment of the riverbank where Aquatic organisms can run upstream by continuously laying them at intervals that allow them to run upstream. The arrangement direction of the second water blocking block 15 may be appropriately determined depending on the terrain. Further, in order to prevent the movement due to the flow of the river, holes 4 for inserting bolts or the like for arranging are provided in the bottom portion 2 or the water stop walls 6 and 7, and the holes are arranged in the river bed 27 or the concrete wall 26 on the riverbank. You may comprise.

As shown in FIG. 10, the second water blocking block 15 used in the third embodiment has a square or rectangular bottom portion 2 and a predetermined height from the edges of two sides of the bottom portion 2. There are formed two water stop wall plates 6 and 7 standing upright in one body. This is an example in which two outlets 5 are provided at the upper edge of the water stop plate 6 as a flow path for water and a path for aquatic life.

The fourth embodiment of the river activation regeneration method is a method of laying the water blocking block 20 on a concrete riverbed. FIG. 11 is used in the fourth embodiment,
An example in which the third water blocking block 20 is laid on the riverbed is shown. The third water blocking block 20 includes, for example, the water blocking wall plate 6,
Riverbed 2 with the side where 7 and 8 are not provided facing upstream
7. The water flowing from the upstream is received to create a water storage area.

As shown in FIG. 12, the third water blocking block 20 used in the fourth embodiment has a square or rectangular bottom portion 2 and a predetermined height from the three side edges of the bottom portion 2. 1
Three water stop wall plates 6, 7, and 8 which are erected on the body are formed. At the upper edge of the water stop plate 6, one or a plurality of outlets 5 (two in this embodiment) are provided as water passages and passages for aquatic life. This water blocking block 2
It is possible to lay 0 at predetermined intervals in a straight line in the direction of the flow of the river bed to form a continuous water storage area and enable the aquatic organism to run upstream. Further, in order to prevent the movement due to the flow of the river, the bottom portion 2 may be provided with a hole 4 through which an arrangement member such as an arrangement bolt is inserted, and the hole 4 may be arranged in the river bed 27.

The water blocking block 20 may be arranged in a direction and a position depending on the structure of the river. Water is accumulated by the flow of the river from the upstream and sediment is deposited to restore the natural environment.

Further, the water blocking blocks 1, 10, 15, 20 described above can be regenerated into a natural environment suitable for a river by laying them in combination according to the state of the river.

[0066]

EFFECT OF THE INVENTION The river activation regenerating method of the present invention is a river activation for storing water so that aquatic organisms can live in a river whose water retention capacity is remarkably reduced due to formation of river bed and bank by concrete or stone. Regeneration method, in the wall surface where the slope in the river is formed at a predetermined angle or more, within a predetermined step interval so as to form a staircase from one side of the river in the vertical direction to the other side A step of providing a plurality of first water storage means and a step of providing a plurality of second water storage means within a predetermined distance interval in the horizontal direction in a place where the riverbed slope is gentler than a predetermined inclination angle in the river And each of the first water storage means and the second water storage means has an aquatic organism inhabiting the water storage means and jumping to an adjacent water storage means. The river activation regeneration method having a sufficient depth to enable the stored water to have an outlet formed on the downstream side wall of each water storage means so that the stored water flows into the water storage means on the downstream side. Is.

As a result, in the present invention, aquatic organisms can be created when the river is drought simply by laying a water storage tank and a water blocking block without destroying the concrete wall 26 or river bed 27 of the cement-three-sided river that does not retain water. It is possible to create a water storage area that stores water for people to survive. In addition, by arranging multiple types and sizes of water tanks and water blocking blocks, it is possible to lay them efficiently according to the river conditions, and store the water flowing from the upstream to provide a place where aquatic organisms can live. Then, it was made possible to regenerate the river in a state closer to the natural environment.

Further, according to the river activation rejuvenation method of the present invention, it is not necessary to destroy the constructed concrete river, the laying work is relatively simple, the river activation rejuvenation is performed at a low cost in a short construction period. Has been realized.

[Brief description of drawings]

FIG. 1 shows an example in which water tanks are arranged in a staircase along a levee or erosion control dam wall.

FIG. 2 shows a perspective view of a water tank.

FIG. 3 shows another form example of the first embodiment example shown in FIG.

FIG. 4 shows a schematic view in which the water storage tank 1 is continuously arranged on a riverbed and a bank.

FIG. 5 shows an example in which a first water blocking block is laid on the riverbed.

FIG. 6 shows a perspective view of a first water blocking block.

FIG. 7 is a perspective view showing a state where the water blocking block is fixed to the riverbed with bolts.

FIG. 8 shows a sectional view of the river bed and the water blocking block screwed together with bolts and nuts.

FIG. 9 shows an example in which a second water blocking block is laid on the riverbed.

FIG. 10 shows a perspective view of a second water blocking block.

FIG. 11 shows an example in which a third water blocking block is laid on the riverbed.

FIG. 12 shows a perspective view of a third water blocking block.

FIG. 13 shows a first conventional example of a concrete river.

FIG. 14 shows a second conventional example of a concrete river.

FIG. 15 shows a third conventional example of a concrete river.

FIG. 16 shows a third conventional example of a concrete river.

[Explanation of symbols]

1 water tank 2 bottom 3 wall boards 4 mounting holes 5 Outlet 6 Water stop plate 10 First water blocking block 15 Second water blocking block 20 Third Water Block 25 bank 26 quay 27 Riverbed 28 Wall

Claims (17)

[Claims] 1. A river activation regeneration method for storing water so that aquatic organisms can live in a river whose water retention capacity has been lowered by laying concrete or rocks on the riverbed and bank, and the slope in the river has a predetermined slope. In the wall surface formed at an angle or more, a step of providing a plurality of first water storage means within a predetermined step interval so as to form a staircase from one side of the river to the other side in the vertical direction, and In a place where the riverbed slope is less than or equal to a predetermined inclination angle in the river, the step of providing a plurality of second water storage means within a predetermined distance interval in the horizontal direction comprises the first water storage means and the first water storage means. Each of the second water storage means
Each of the reservoirs has a sufficient depth to allow aquatic organisms to live within the reservoir and jump to the adjacent reservoir, and the stored water flows into the downstream reservoir. A river activation regeneration method, characterized in that an outlet is formed on the downstream side wall of the means. 2. The step of forming a water outlet on one side of the upper edge of the bank on the wall surface where the slope in the river is formed at a predetermined angle or more, and aquatic organisms running up the river. The step of determining the step between the water storage areas that can be run up, and a plurality of steps within a predetermined step interval so as to form a stairway from one side of the river to the other side in the vertical direction based on the step. A step of deciding a position for arranging the first water storage means, a step of burying an arranging member for arranging the water storage tank at the arranging position of the wall surface, and a stepwise step of arranging the first water storage means. And the step of arranging the outflow port provided in the first water storage means toward the downstream side, the first water storage means being arranged. Water flowing from the upstream due to the water storage means on the downstream side one after another Pooled in rivers activation reproducing method according to claim 1, characterized in that to allow run-up and habitat of aquatic organisms by creating a continuous reservoir area. 3. In the river where the slope of the riverbed is gentler than a predetermined inclination angle, the positions where the second water storage means are continuously arranged are arranged at a predetermined distance in the horizontal direction. And a step of arranging the second water storage means with the outlet facing the downstream side, and the water flowing from the upstream by the arranged second water storage means one after another. The method for regenerating a river according to claim 1, wherein the river is stored in a water storage means on the downstream side and a continuous water storage area is formed to enable the aquatic organism to inhabit and run upstream. 4. In the place where the riverbed is formed in a step-like shape in the river, a step of determining whether the step of the step is a step in which an aquatic organism can go up, and the step of going up is possible. In the case of a step, the step of arranging the second water storage means on the downstream side of the stairs; and in the case of a step in which the run-up is not possible, further, the first water storage means between the steps. And a step of arranging, wherein the water flowing from the upstream is successively accumulated in the downstream water storage means by the arranged first water storage means and second water storage means, and the continuous water storage area is provided. The method for activating and regenerating rivers according to claim 1, wherein the method enables the aquatic organism to inhabit and run upstream. 5. The first water storage means is formed of a bottom portion and a water stop wall plate standing upright at a predetermined height from an edge of a side of the bottom portion. The river activation regeneration method according to claim 1 or 2, which is a water storage tank having one or a plurality of outflow ports as a water flow path and a waterway path on the upper edge. 6. The river activation regeneration method according to claim 5, wherein the disposition on the wall surface is performed by embedding a disposition member such as a bolt in a disposition portion on the wall surface. 7. The step of arranging the one or a plurality of the water storage tanks on the wall surface with a mounting member such as the bolt through a hole-shaped mounting means provided in the water storage tank. The river activation regeneration method according to claim 6, wherein the river activation regeneration method is provided. 8. The river activation regeneration method according to claim 1, wherein the water storage tank is formed of reinforced concrete or concrete with a metal net as a core. 9. The second water storage means is formed of a bottom portion and a water stop wall plate standing upright at a predetermined height from an edge of a side of the bottom portion. The river activation regeneration method according to claim 1 or 3, wherein the water blocking block is provided with one or a plurality of outflow ports as a water flow path and an aquatic life path at an upper edge. 10. The water blocking block is formed of a bottom portion and a water blocking wall plate which is erected as one body at a predetermined height from an edge of one side of the bottom portion, and includes the outflow port, The river activation regeneration method according to claim 9, wherein the river activation regeneration method is arranged on the riverbed to form a water storage area where water is retained by the water stop plate. 11. The water blocking block is formed of a bottom portion and two water blocking wall plates which are provided upright at a predetermined height from the edges of the two sides of the bottom portion, and which has the outflow port. 10. The river activation regeneration method according to claim 9, wherein the water retaining wall plate is provided on the riverbed to form a water storage area where water is retained. 12. The water blocking block is formed of a bottom portion and two water blocking wall plates which are erected as one body at a predetermined height from the edges of the three sides of the bottom portion, and comprises the outflow port. 10. The river activation regeneration method according to claim 9, wherein the water retaining wall plate is provided on the riverbed to form a water storage area where water is retained. 13. The river activation regeneration method according to claim 9, wherein the water blocking block laid in the river is made of reinforced concrete or concrete with a metal net as a core. 14. A river activation regeneration device for allowing aquatic life to inhabit a concrete river whose riverbed and bank are made of concrete, wherein the slope in the river is formed at a predetermined angle or more. In the vertical direction, a plurality of first water storage means within a predetermined step interval so as to form a stair from one side of the river to the other side in the vertical direction, and the slope of the riverbed in the river has a predetermined inclination angle. In the following gentle places, a plurality of second water storage means are provided within a predetermined distance in the horizontal direction, and each of the first water storage means and the second water storage means has aquatic organisms. The water has a sufficient depth to live in the water storage means and to jump to the adjacent water storage means, and the stored water flows to the water storage means on the downstream side. A river activation regeneration device, characterized in that an outlet is formed on the downstream side wall of each of the water storage means so as to be inserted. 15. The first water storage means includes a bottom portion, a water stop wall plate standing upright at a predetermined height from an edge of a side of the bottom portion, and an upper edge of the water stop wall plate. 3. The river activation regeneration device according to claim 1, wherein the river activation regeneration device is a water storage tank configured with one or a plurality of outlets as water flow passages and aquatic organism passages. 16. The second water storage means includes a bottom portion, a water stop wall plate standing upright at a predetermined height from an edge of a side of the bottom portion, and an upper edge of the water stop wall plate. The river activation regeneration device according to claim 1 or 3, which is a water blocking block configured with one or a plurality of outlets as a flow path of water and a passage of aquatic life. 17. The first water storage means and the second water storage means are formed of reinforced concrete or concrete with a metal net as a core.
The river activation regeneration device described in.