JP3081169B2 - Artificial waterways for aquatic life - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial waterway which forms a habitat for aquatic organisms for protecting and breeding aquatic organisms and preserving water quality in a downstream area.

[0002]

2. Description of the Related Art Conventionally, various flora and fauna have been bred in natural rivers, irrigation canals, Ozawa, wetlands and the like. And, taking Onyanma as an example, its larva, yago, is found in the mud between the roots and stems of aquatic plants such as algae and reeds that thrive in these basins.
It dives out of its head and belly, dries in the mud during droughts, and is trapped by the roots of aquatic vegetation during flooding to avoid downstream spills. On the other hand, food consumes zooplankton, insects, small fish, tadpoles, etc., which are the same aquatic animals such as daphnia. These small animals feed on animal and phytoplankton in water, and the plankton of the animal and plant breeds using sodium, potassium, magnesium, calcium and the like in the soil as nutrients, and forms a balanced food chain.

However, in conventional natural rivers and irrigation canals, river banks have been eroded and collapsed, and water has overflowed due to collapse when the water level increased. In addition, the riverbed was eroded and deepened, and sediment was deposited and buried in places where the flow was slow. Therefore, it was necessary to frequently maintain rivers and irrigation channels, and there was a risk of human injury.
In particular, it hindered the development of residential land and tourism that has been actively promoted in recent years. In addition, even in the development of agricultural land, in conventional natural irrigation canals, water volume adjustment does not work well, water increases according to the weather, or the water dies, so it is not possible to use water as desired, In some cases, the growth of crops was hindered. Therefore, while being able to control the amount of flowing water to some extent, erosion and breakage are unlikely to occur.
Artificial waterways made of concrete members and metal members became popular.

Also, spring water, wetlands, and swamps cause landslides and obstruct the effective use of land. An artificial drainage channel was laid with concrete members or metal members, and the drainage channel was buried underground such as a hillside. As a result, water that flows on the ground surface, such as rainwater, does not stay on the ground surface, but flows through drainage channels to distant lowlands, and spring water and swamp water do not flow on the ground surface. It became dry and suitable for field cultivation, and prevented disasters such as landslides.

[0005]

However, the artificial water channel formed of the concrete member or the metal member as described above has a low resistance to flowing water and is formed flat without any irregularities on the river bottom and wall surfaces. Therefore, the flow velocity of the water flowing through the flow section of the conventional artificial waterway is extremely high, and aquatic organisms are flown downstream without staying in the artificial waterway, and sediment transported from the upstream does not accumulate on the riverbed without accumulating on the riverbed. Is washed away.

For this reason, it has become difficult for aquatic plants to proliferate in the artificial waterway. And there are no hideouts where aquatic animals such as goats can hide, and they are washed down with water. In addition, animal and phytoplankton cannot absorb the nutrients necessary for growth from the soil and cannot breed, resulting in a shortage of food for aquatic animals. In addition, in the case of drought such as sunshine, concrete and metal are promoted to dry, and the riverbed is completely dried up, so that it is temporarily impossible to replenish moisture that can withstand. As a result, aquatic organisms that have inhabited the waterside and underwater have disappeared, and the balance of the natural environment has been disrupted.

As described above, although the artificial waterway breaks the balance of the environment, the use of the artificial waterway cannot be stopped from the standpoint of disaster countermeasures such as landslides and debris flows, the protection of residential land and agricultural land, and the like. However, in the future, it is necessary to restore a harmonious natural environment for people to live better and safer lives.

The present invention is intended to solve the above-mentioned problems, and reconstructs an environment in which aquatic organisms such as Onyanma goats can inhabit, restores a harmonious natural environment, and provides water quality in downstream areas. The purpose of the present invention is to provide an artificial waterway that enables the preservation of water.

[0009] Therefore, wings are formed to protrude in the flowing water portion of the artificial waterway to mitigate the steep water flow in the artificial waterway, thereby preventing the outflow of sediment and depositing the sediment within a certain range, It secures habitat. Then, aquatic plants such as algae and reeds proliferate in the earth and sand of the habitat, and the aquatic animals can proliferate using the aquatic plants as dwellings and hideaways. In addition, small aquatic organisms such as plankton can be bred, and a food chain starting from them can be constructed to restore a balanced natural environment.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to an artificial waterway in which an artificial both-side wall and the both-side wall are connected by a lower bottom wall to form a flowing water portion. From at least one of the walls, a plurality of wings projecting at a right angle or in a downstream direction with respect to the water flow from the wall at a constant interval in the flowing water direction and projecting sediment in advance in the downstream direction of the wings at the time of construction. It is.

[0011] The shield may be formed at the tip of the wing in the protruding direction in the downstream direction in parallel with the water flow.

[0012] In addition, the water flow section may be provided with a plurality of water collecting basins formed at a certain interval, the water depth being formed deeper than the lower bottom wall of the water flow section.

[0013] The running water section is provided on both sides of the river in parallel with the running water section.
Mats or sandbags may be laid to survive the plants.

[0014]

Since the present invention has the above-mentioned structure,
In the water flow section of the artificial waterway, in a watershed where no wing is provided, flowing water resistance is low, and water flows from the upstream at a high flow velocity. Then, in the flowing water portion protruding from the wing, the flowable region of the water is narrowed by the wing, and the water bypasses the wing and flows downstream. Therefore, the water from the upstream does not flow into the back surface in the downstream direction of the wing at a high flow velocity, and the water is stagnated. Then, small fish and the like can be evacuated to this stagnation, or this stagnation can be used as a dwelling house.

[0015] Also, on the back side in the downstream direction of this wing,
If sediment is deposited in advance at the time of construction, this sediment will be protected by the wing and will not be flowed almost downstream,
Immediately after the completion of the artificial waterway, it becomes possible to breed aquatic plants and aquatic animals. In addition, since the flow is blocked by the wing, the flow velocity of the water flowing on the wing side is reduced, and the sediment flowing with the water from the upstream is deposited on the riverbed on the wing side where the flow is gentle.

As described above, aquatic plants such as algae and reeds propagate on the soil deposited on the back of the wing. In addition, the propagation of aquatic plants increases the effect of preventing the outflow of sediment, and forms the best homes and hidden places for small fish and aquatic insects between the stems and roots of the aquatic plants, These aquatic animals can also be prevented from being swept downstream. In addition, it absorbs sodium, potassium, magnesium, calcium and other nutrients contained in sediment, and plankton such as daphnia and euglena breed. Small animals such as fish and tadpoles breed. And the small goats of Oniyama and other small animals that ingest these small animals grow. In addition, carcasses and excrement of the above-mentioned organisms settle on the sediment and become nutrients of aquatic plants again, and a harmonious food chain is established. In addition, water purification is carried out by the propagation of aquatic plants and the accumulation of sediment,
Enables preservation of the quality of water flowing into downstream areas.

On the other hand, when water is increased due to heavy rain or the like, the wing disposed in the flowing water section becomes an obstacle, so that a large amount of water is prevented from flowing into the back of the wing, and the accumulated sediment is prevented from flowing out.
For this reason, Oniyama inhabiting behind this wing,
Other aquatic organisms can be prevented from being swept downstream. Furthermore, in the sandy mud between the roots and stems of the aquatic plants that grew in the artificial waterways, places where small animals hide themselves and are caught by the roots of the aquatic plants can also be prevented from flowing away. It becomes a factor.

[0018] In the case of Onyanma, for example, a locust that has grown sufficiently after ingesting food has evolved into Onyanma and flies around the artificial waterway, and lays eggs again in the stagnation of the artificial waterway. In this way, even in the case where it is necessary to use an artificial waterway for flood control, a natural balanced environment can be formed.

If the wing is formed with a shield parallel to the water flow at the end in the protruding direction, the portion surrounded by the wing and the shield becomes stagnant, and the effect of preventing the outflow of earth and sand is improved. The area where aquatic organisms can live can be expanded.

Further, in the flowing part of the artificial waterway, the wing formation part is formed deeper than the flowing part without the wing to form a groove-like accumulation concave part parallel to the water flow. Even when the amount of water is small, such as a hot peak, or even in an area where the amount of water is generally small, the water moves to the low accumulation concave side. Then, the water flows from the upstream side to the downstream side of the accumulation concave portion through the space between the lower end of the wing and the accumulation concave portion, so that the water always flows on the accumulation concave portion side unless the water completely dries.

[0021] Even if water is not supplied, if water remains in the artificial waterway, this water flows and accumulates in the lower sedimentary depression at the bottom of the river, so that water is supplied to the sediment in the sedimentary depression. You. Therefore, it is possible to secure a minimum amount of water sufficient for aquatic life in the soil where the aquatic life grows,
Enables aquatic life. Further, the formation width of the deposition concave portion may be formed to be the same width as the wing formation portion.
Also, it may be formed narrower than the wing formation site,
If water can flow through the lower end of the wing, it can be placed at an appropriate position in the wing formation site.

In addition, when a plurality of catchment basins having a deeper water depth than the lower bottom wall of the flowing water portion are provided at regular intervals in the flowing water portion of the artificial waterway, the water collects in the catchment basin and the water is collected. Can be secured. Also, as the water depth becomes deeper, the water flow in the catchment basin becomes slower, and the sediment carried from the upstream accumulates at the bottom of the catchment basin, providing a good habitat for aquatic organisms. Becomes And even if the water in the artificial canal dies due to a drought over a long period of time, it is highly likely that this deep water catchment basin will have enough water to survive the hunger, and the evaporation of water due to the accumulation of sediment. It will be suppressed. For this reason, aquatic plants, flora and fauna plankton breed inside this catchment basin, and as a result, insects, small fish, tadpoles and goats that feed on the goat can survive by moving to this catchment basin. Becomes

In addition, if a mat or sandbag for cultivating plants is laid on both sides of the artificial waterway in parallel with the waterflow section, as the terrestrial plants grow on the mat or sandbag, the flowing water may be removed. Branches, stems, leaves, etc. of the artificial waterway extend to the flowing water part or fall into the flowing water part. The branches, stems, leaves, and the like of the plants that have entered the flowing water portion serve as a bridge for the Onyanma, kawagera, and other insects that have grown in the artificial waterway to emerge and emerge outside the artificial waterway.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (1) is an artificial waterway, and both side walls of the artificial waterway (1).
(2) (3) and lower bottom wall (4) connecting these side walls (2) (3)
Is formed by laying concrete members. As shown in FIG. 3, both sides (2) and (3) and a lower bottom wall (4) provide a flow section having a U-shaped cross section to the artificial waterway (1).
(5) is formed, and water (6) flows into the artificial waterway (1).
(5) flows in the direction of the arrow in FIG.

A plurality of wings (7) are connected to one side wall (2) of the artificial waterway (1) at appropriate intervals. As shown in FIG. 1, the wing (7) projects a plate-like member from one of both side walls (2) toward the center of the flowing water portion (5), and makes the plate-like member perpendicular or downstream to the water flow. It is arranged to be inclined in the direction. In this embodiment, the wing (7) protrudes almost to the center of the flowing water portion (5), but the wing (7) has a wide end by protruding the tip from the center to the other side wall (3). It may be formed. However, if it is too wide, the water (5) may be blocked, and the water (6) may not flow smoothly. Further, the tip may be arranged on one side wall (2) side of the center portion to form a narrow portion. However, if it is too narrow, the effect of obstructing the water flow may not be exhibited. Therefore, it is desirable to provide the artificial waterway (1) appropriately in consideration of the scale of the waterway (6) and the flow velocity of the water (6).

The lower end of the wing (7) is connected and fixed to the lower bottom wall (4) as shown in FIGS.
Increases water pressure resistance. In addition, the wing (7)
The height from (4) is the same as the height of both side walls (2) and (3). The formation height of the wing (7) is
(3) It may be formed lower, but if it is too low, a large amount of water (6) flows over the wing (7) when the water is increased, and there is a possibility that the effect of obstructing the flow may be lost. Also wing
(7) may be formed higher than both side walls (2) and (3), but water (6) does not hit the portion protruding above both side walls (2) and (3), so that water flow is blocked. There is no effect, and if it is too high, it will get caught in the body of a person passing near the artificial waterway (1) and become an obstacle.

In the artificial waterway (1) of the present embodiment, a wing (7) to which a shield (8) is connected at the tip in the protruding direction is appropriately arranged. The shield (8) is formed by connecting and fixing a plate-like member arranged in parallel with the water flow in a downstream direction from the tip of the wing (7) on the projecting side. In addition, this shield (8) has a lower end connected to the lower bottom wall (4) to enhance the sense of stability, and the height formed from the lower bottom wall (4) is the same as the formation height of the wing (7). I have.

Further, the flowing water portion of the artificial waterway (1) of the present embodiment.
In (5), as shown in FIGS. 1 and 2, a plurality of collecting basins (10) made of concrete members are provided at regular intervals. The catch basin (10) has a deeper water depth than the lower bottom wall (4) of the flowing water part (5), and is formed wider than the flowing water part (5). Then, earth and sand (11) and gravel are previously deposited on the bottom of the catchment basin (10) during construction. In addition, on the back side of the wing (7) in the downstream direction,
1) is deposited. By depositing the earth and sand (11) in advance in this way, it becomes possible to breed aquatic organisms immediately after the completion of the artificial waterway (1).

Also, on the ground surface on both sides of the artificial waterway (1),
A mat (12) having a good survival of terrestrial plants (17) is laid in parallel with the flowing part (5). The mat (12) contains, for example, a mixture of seeds and soil of the land plant (17), and if a mat made of naturally decomposable cloth is used, the land plant (17) can be removed from the surface of the mat (12). As (17) germinates, the roots extending from the lower surface of the mat (12)
It becomes well rooted on the ground surface covered with the mat (12). Then, after the terrestrial plants (17) grow and take root on the ground surface, the fabric is naturally decomposed and disappears, and the aesthetic appearance and the environment are not impaired.

When the riverbank of the artificial waterway (1) is covered with a concrete member, sandbags are piled up on both sides of the artificial waterway (1) instead of the mat (12). ) Can be supplied, and land plants (17) can be propagated on the sandbag soil, and can be used as a dike for increasing water. In addition, if the sandbag is made of a material that can be naturally degraded, land plants (1
During the growth process of 7), the soil in the bag is not lost, and when the land plant (17) is completely rooted, the bag is broken down and disappears, which also helps prevent environmental destruction. Things.

When the water (6) flows from the upstream into the artificial waterway (1) formed as described above, the flow resistance of the flowing water part (5) is low at the place where the wing (7) is not connected. ,water
(6) flows at a high flow rate in the flowing water part (5). At the place where the wing (7) of the running water section (5) is connected,
(5) is narrowed in half by the wing (7), and the water (6) flows downstream at a high flow velocity on the other side wall (3). 11) flows downstream without depositing. In contrast, one side wall
In (2), since the water (6) does not flow into the back surface of the wing (7) at a high flow rate, a stagnation (13) of the water (6) is formed, and a running water portion (13) on the wing (7) side is previously formed. The earth and sand (11) deposited in advance in 5) is less likely to be eroded by a strong water current, and is not drained downstream.

Further, in the stagnation (13), since the water flow is gentle, aquatic animals such as small fishes are evacuated and become a suitable home. In addition, in the soil (11) of the stagnation (13), aquatic plants (14) such as algae and reeds absorb and propagate nutrients such as minerals contained in the soil (11). In addition, phytoplankton propagates by ingesting this nutrient.

The phytoplankton is used as a bait to breed zooplankton such as daphnia, and the animal and plant plankton is used as a bait for insects and small fish to breed.
Large insects and small animals such as (16) breed. This stagnation
In (13), since the flow rate is slow, the aquatic organisms described above settle in the stagnation (13) and inhabit without flowing downstream. In addition, the ability of aquatic animals to hide between the roots and stems of the aquatic plant (14) and to be caught by the roots and stems is also useful for preventing aquatic animals from being washed away. In this way, the wing (7) is projected into the flowing water part (5) to form the stagnation (13) of the water (6), thereby supplying the artificial waterway (1) with a habitat of aquatic organisms and a nutrient source. Becomes possible.

In the water collecting basin (10) provided at an appropriate interval in the artificial waterway (1), the soil (11) is previously deposited on the bottom, and the soil (11) carried from the upstream is also deposited. I do. And since the catchment basin (10) is deeper than the flowing water part (5), sediment is not dug out by the water flow,
(11) stays without flowing downstream. Therefore, this earth and sand
In (11), the aquatic plant (14) becomes capable of breeding, and forms a favorable aquatic habitat.

Even if the water (6) in the artificial waterway (1) dies due to a drought or the like for a long period of time, the water collecting basin having a deep water depth may be used.
Since soil (11) is deposited on (10), it takes more time for the water (6) to dry up than for concrete members,
Water (6) necessary for aquatic organisms is secured for a long time. In addition, aquatic plants (14) can inhabit the sediment (11) deposited in the catchment basin (10), and yagos (16) and other aquatic organisms can evacuate into the mud.

As described above, aquatic organisms are protected by the wing (7) and do not flow downstream, but settle in the artificial waterway (1). Also, when the water flow is accelerated during flooding due to heavy rain, the wing (7) becomes a breakwater,
Prevent water (6) from flowing into the back of (7)
The earth and sand (11) can be left on the back of (7). And
Goats (16) and other aquatic animals are left with sediment (11)
They are caught by the roots of aquatic plants (14) that have bred in the wild, or hidden in the mud between the stems and roots, so that they are not washed away downstream.

The wing (7) projecting perpendicular to the water flow has a large water pressure per unit area in a place where the flow rate of the water (6) is large and the flowing velocity is high, so that the wing ( 7) may be destroyed. Therefore, the wings are inclined so that they
When (7) is formed, the water pressure is dispersed, and the impact is weakened.
Further, the water (6) hardly flows into the corner formed by the wing (7) and both side walls (2), and the effect of preventing the loss of the earth and sand (11) is further improved.

If the water flow is strong, the water (6) may flow to the back of the wing (7), and the earth and sand (11) may be washed away. Therefore, shield (8)
When the wing (7) provided with is arranged, as shown in FIG.
The shield (8) serves as a breakwater to prevent the water (6) from flowing into the stagnation (13) at a high speed, so that the sediment (11) deposited on the back of the wing (7) is more effectively prevented from being washed away. I do. Even if the water (6) flows into the stagnation (13) violently, it is possible for the aquatic organisms to evacuate behind the shield (8) and avoid spillage.

On the mats (12) laid on both sides of the artificial waterway (1), land plants (17) proliferate. Then, as the land plant (17) grows, the stems, leaves and branches grow or fall, and hang down in the flowing part (5) of the artificial waterway (1). Then, the yago that grew in the artificial waterway (1)
When (16) etc. emerge, they can go out of the artificial waterway (1) through the stalks and leaves hanging in the flowing water part (5), and are a bridge when transforming from aquatic organisms to terrestrial organisms Becomes And the emerged Onyanma (15) is again turned into an artificial waterway (1)
Spawning in the soil of the soil (11) and the stem of the aquatic plant (14) can maintain a balanced natural environment. In addition, as described above, aquatic organisms breed and the presence of earth and sand (11) purifies the water (6) flowing through the artificial waterway (1), and the water (6) flowing into the downstream area of the artificial waterway (1). ) Water quality can be preserved.

Further, in this embodiment, the artificial waterway (1) is provided with a water collecting basin (10) formed in a square shape by a concrete member. ) May be provided. Then, even if the flowing water part (5) increases due to heavy rain or the like, a large amount of water can flow into the water collecting basin (10) of the basin type. Also, by damming the downstream side of the catchment basin (10) of the retarding basin type and retaining water in the catchment basin (10), a large amount of water flowing downstream can be prevented. This catchment basin
If water is stored in (10), in the event of a shortage of water in the artificial waterway (1), the stored water (6) can be discharged to the downstream area to eliminate the water shortage, and water (6) required for aquatic organisms can be eliminated. It can always be supplied. In this way, the catchment basin (10) of the retarding basin type is on flood control,
It will be effective.

Further, in another different second embodiment, similarly to the first embodiment, an artificial water channel formed by providing a wing (7) is provided.
In (1), as shown in FIG.
Is provided. This accumulation concave portion (18) digs the lower bottom wall (4) of the wing (7) formation site (20) deeper than the lower bottom wall (4) on the side where the wing (7) is not provided. , Formed in a groove shape parallel to the water flow. And the wing
Water (6) is allowed to pass through the space between the lower end of (7) and the accumulation recess (18). Further, in the present embodiment, the accumulation concave portion (1
The formation width of 8) is slightly narrower than the formation portion (20) of the wing (7), and the protruding end of the wing (7) is attached to the lower bottom wall (4) of the other side wall (3). By fixing the connection, the stability of the wing (7) is enhanced, and the wing (7) can withstand severe water flow.

In the artificial water channel (1) provided with the accumulation recess (18) as described above, the water (6) does not flow into the side provided with the wing (7) and the stagnation is gentle as in the first embodiment. (13) is formed. Sediment (11) accumulates on this stagnation (13),
Aquatic organisms such as aquatic plants (14) and goats (16) proliferate.
And, in the summer when the amount of water is small, or in the area where the amount of water is generally small, even if the amount of water flowing through the flowing water section (5) is small,
As shown in FIG. 4, the water (6) flows to the lower side of the water depth, so that it flows on the side of the accumulation recess (18).

Then, the water (6) passes through the lower end of the wing (7), flows downstream in the accumulation recess (18), and is completely removed from the water (6).
As long as the soil does not dry out,
Water (6) is supplied to (11). Further, even if the supply of water (6) from the upstream stops, the water (6) remaining in the flowing water part (5) flows to the accumulation concave part (18) having a low water depth.
Water (6) necessary for life activities can be secured. In this way, by providing the accumulation concave portion (18), it is possible to secure a habitat of aquatic organisms, and to secure a minimum amount of water (6) sufficient for aquatic life, and to ensure the survival of aquatic organisms. The probability is high.

In each of the above embodiments, the wing (7)
Is provided only on one side wall (2) of the artificial waterway (1), but in another different third embodiment, as shown in FIG. 5, one side wall (2) and the other side wall (2) are provided. Wing (7) for both 3)
Is provided. The wings (7) are preferably arranged alternately on the left and right at regular intervals so as not to obstruct the flow of the water (6).

In the artificial waterway (1) as described above, sediment (11) is deposited on both the side walls (2) and the other side walls (3) to secure a habitat for aquatic organisms. Can be. Also, the method of providing the wings (7) on both side walls (2) and (3) is that in the case of an artificial waterway (1) having a narrow river width, the course of the water flow is obstructed by the wings (7) and the water flows smoothly. It is preferable to use the artificial waterway (1) having a wide river because there is a possibility that (6) may not flow.

[0046]

Since the present invention is constructed as described above, an artificial water channel provided with wings is formed to alleviate the water flow, thereby enabling sediment to be deposited in the artificial water channel.
It will be possible to supply the appropriate amount of water necessary for aquatic organisms such as Oniyama to inhabit, and the sediment containing nutrient sources that are the origin of the food chain.

Then, aquatic plants such as algae and reeds can be propagated in the earth and sand of the habitat, and aquatic animals can be propagated between the stems and roots of the aquatic plants as a habitat or a hideout. is there. In addition, small aquatic organisms such as plankton can breed, and a food chain originating from them can be constructed, and a balanced natural environment can be constructed in the artificial waterway. In addition, the water can be purified, and the quality of the water flowing into the downstream of the artificial waterway can be preserved.

Also, on the back side of this wing in the downstream direction,
Since the sediment was deposited in advance at the time of construction, the sediment was protected by the wings and would not be washed away almost downstream, so that the aquatic plants and aquatic animals could be bred immediately after the completion of the artificial waterway. It becomes.

[Brief description of the drawings]

FIG. 1 is an overall plan view of an embodiment of an artificial waterway according to the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1;

FIG. 4 is a cross-sectional view of an artificial waterway according to a second embodiment in which a deposition recess is provided in a flowing water portion.

FIG. 5 is an overall plan view of an artificial waterway according to a third embodiment in which wings are provided on both banks.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Artificial waterway 2 Both side walls 3 Both side walls 4 Lower bottom wall 5 Flowing part 7 Wing 8 Shield 10 Water collecting basin 11 Earth and sand 12 Mat 17 Land plant 18 Depression recess 20 Forming site

Claims (4)

(57) [Claims] 1. In an artificial waterway in which a flowing water portion is formed by connecting both artificial side walls and the both side walls with a lower bottom wall, at least one of the both side walls is inclined at right angles or downstream with respect to the water flow. Multiple wings projecting at a certain interval in the direction of the flowing water section, and at the back of the wing in the downstream direction
Is an artificial waterway for aquatic organisms , in which earth and sand are deposited in advance at the time of construction . 2. The wing has a shield parallel to the water flow formed at a distal end in a protruding direction in a downstream direction.
Artificial waterway for aquatic life. 3. The artificial waterway for aquatic organisms according to claim 1, wherein the flowing water portion is provided with a plurality of catchment basins formed at a certain interval, the depth being formed deeper than the lower bottom wall of the flowing water portion. 4. The artificial waterway for aquatic organisms according to claim 1, wherein a mat or a sandbag for activating the plants is laid on both sides of the running water section in parallel with the running water section.