JP2007267699A - Structure for forming coral reef - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To widely restore a sea area where coral reef declines such as the whitening of coral groups and the death of corals are caused. <P>SOLUTION: This structure 1 for forming coral reefs supports a coral-rooting bed 11 as a cathode, and an anode 10 having a lower natural potential than that of the coral-rooting bed 11 and electrically connected to the coral-rooting bed 11, on support 2 set to a sea bottom. An electric current is flowed from the anode 10 to the coral-rooting bed 11 by a so-called current anode method to promote the growth of corals C rooted on the coral-rooting bed 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to artificial growth of corals.

  In recent years, the decline of coral reefs, such as whitening of coral communities and the death of corals, has become a problem due to the increase in seawater temperature caused by land reclamation and global warming. For this reason, in recent years, attempts have been proposed to restore coral reefs by artificially proliferating corals. Patent Document 1 discloses a coral propagation method as follows. This does not prevent the planula larvae from spreading in the sea area where the planula larvae can settle on the sea floor, without preventing the planula larvae from growing on the bedrock base. A diffusion preventing means for suppressing is arranged. Then, the planula larvae or the seawater in which they float are introduced into the area surrounded by the diffusion preventing means.

JP 2003-219755 A

  However, the technique disclosed in Patent Document 1 requires a means for preventing the diffusion of planula larvae, a means for introducing the planula larvae, or the seawater in which they float, into the region surrounded by the diffusion prevention means. Become a big deal. For this reason, there is room for improvement over the extensive restoration of sea areas where coral reefs have declined, such as coral community whitening and coral death.

  Accordingly, the present invention has been made in view of the above, and provides a coral reef structure suitable for repairing a wide range of sea areas where coral reefs have declined, such as coral community whitening and coral death. The purpose is to do.

  In order to solve the above-described problems and achieve the object, the coral reef structure according to the present invention includes a coral active floor on which corals are activated, a natural potential lower than that of the coral active floors, and the coral. An anode electrically connected to the active floor; and support means installed on the sea floor and supporting the coral active floor and the anode in the sea.

  This coral reef building has a coral active landing as a cathode, and an anode that has a lower natural potential than the coral active landing and is electrically connected to the coral active landing, together with the coral active landing. It is supported by support means installed on the seabed. Then, a current is passed from the anode toward the coral active bed by a so-called galvanic anode method to promote the growth of the corals that have been activated on the coral active bed. Thus, since the so-called galvanic anode method is used, coral growth can be promoted with a simple configuration. In addition, coral reef structures are easy to increase in size due to their simple structure, can be easily transported to the installation sea area, and can be introduced into the installation sea area for installation. Can be installed. In this way, if this coral reef-building structure is introduced, the sea area where coral reefs have declined, such as coral community whitening and coral death, can be extensively restored.

  The coral reef building structure according to the present invention is the coral reef building structure, wherein the support means is a pair of porous members, and the coral survival bed is disposed between the pair of porous members. It is characterized by being.

  Since the coral reef structure has the structure of the coral reef structure, the coral reef structure has the same functions and effects as the coral reef structure. Further, in this coral reef structure, the support means is constituted by a pair of porous members, and the coral active deposit is disposed between the pair of porous members. As a result, it is possible to reduce the weight of the coral reef structure, and it is possible to create an environment in which corals are easily grown by attaching organisms to the porous material.

  The coral reef building structure according to the present invention is characterized in that, in the coral reef building structure, the anode is detachably attached to the support means.

  Since the coral reef structure has the structure of the coral reef structure, the coral reef structure has the same functions and effects as the coral reef structure. Further, this coral reef building structure has an anode removably attached to the support means via a mounting seat provided on the support means. In the galvanic anode method, the anode is consumed over time. According to this coral reef structure, the consumed anode can be easily replaced.

  The coral reef building structure according to the present invention is the coral reef building structure, wherein the support means is an arc-shaped member, and the coral active floor is disposed along the arc-shaped member. It is characterized by that.

  Since the coral reef structure has the structure of the coral reef structure, the coral reef structure has the same functions and effects as the coral reef structure. Furthermore, this coral reef structure is provided with a coral survival floor along an arcuate member. As a result, the coral reef structure can be made lighter and easier to move and install. At this time, like the coral reef structure according to the present invention, it is preferable that the anode is disposed inside the coral laying floor disposed along the support means. In this way, since the distance between the anode and the coral active deposit as the cathode can be made substantially constant regardless of the location of the coral active deposit, it is possible to reduce variations in current depending on the location of the coral active deposit.

  The coral reef building structure according to the present invention is the coral reef building structure, wherein the anode is formed of a net-like insulator, and the anode storage body stores the anode therein. It is attached to a support means, It is characterized by the above-mentioned.

  Since the coral reef structure has the structure of the coral reef structure, the coral reef structure has the same functions and effects as the coral reef structure. Further, in this coral reef building structure, an anode is disposed inside an anode housing formed of a net-like insulator. As a result, the consumed anode can be easily replaced.

  The coral reef structure according to the present invention is characterized in that, in the coral reef structure, a net-like member is formed in a wave shape to form the coral active landing.

  Since the coral reef structure has the structure of the coral reef structure, the coral reef structure has the same functions and effects as the coral reef structure. Further, this coral reef structure is configured by forming a coral erection floor by forming a net-like member into a wave shape. Thereby, the coral settled on the coral hot landing floor can be protected from fish that damages the coral. Note that the wavy shape includes a case where the crests and troughs are formed in a straight shape and a curved surface, as well as a case where the crests and troughs are formed in a flat shape.

  The coral reef structure according to the next aspect of the present invention is the coral reef structure, wherein an end of a net-like and plate-like member protrudes toward the outside of the coral reef structure, It is characterized by coral live landing.

  Since the coral reef structure has the structure of the coral reef structure, the coral reef structure has the same functions and effects as the coral reef structure. Further, the coral reef building structure is configured by coral stagnation with the end portions of the net-like and plate-like members protruding toward the outside of the coral reef building structure. Thereby, the coral settled on the coral hot landing floor can be protected from fish that damages the coral.

  The coral reef building structure according to the present invention is characterized in that, in the coral reef building structure, a porous coating layer is provided on the surface of the coral active landing bed.

  Since the coral reef structure has the structure of the coral reef structure, the coral reef structure has the same functions and effects as the coral reef structure. Further, since the coral reef structure is provided with a porous coating layer on the surface, the coral skeleton and the coating layer are easily adapted to each other, so that the coral is easily entrapped on the coral active landing floor.

  The coral reef building structure according to the present invention is characterized in that, in the coral reef building structure, a current limiting means is provided between the coral active landing and the anode.

  Since the coral reef structure has the structure of the coral reef structure, the coral reef structure has the same functions and effects as the coral reef structure. Furthermore, this coral reef structure is provided with a current limiting means such as a resistor or a diode between the coral hot landing floor and the anode. As a result, the current flowing between the anode and coral active bed (cathode) can be adjusted according to the sea conditions such as the flow velocity and salinity of the sea area where corals are grown, so the coral grows around the cathode according to the sea conditions. An optimum environment can be obtained.

  The structure for coral reef building according to the present invention can repair a wide range of sea areas where coral reefs such as coral community whitening and coral death have occurred.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the best mode for carrying out the invention (hereinafter referred to as an embodiment). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those that belong to a so-called equivalent range.

  In this embodiment, the coral active floor on which corals are activated is used as a cathode, and the anode having a lower natural potential than the coral active floor is electrically connected to the coral active floor, with support means installed in the sea. The coral active bed and the anode are supported in the sea. A feature is that the current flowing between the anode and the coral active bed, which is the cathode, promotes the growth and growth of coral on the coral active floor.

(Embodiment 1)
FIG. 1 is a front view illustrating a configuration of a coral reef structure according to the first embodiment. FIG. 2 is a plan view showing the configuration of the coral reef structure according to the first embodiment. FIG. 3 is a side view illustrating the configuration of the coral reef structure according to the first embodiment. The coral reef structure 1 includes a coral live landing floor 11. Then, the coral reef structure 1 is installed on the seabed B, and the coral C cultivated on the coral active landing floor 11 or naturally cultivated is bred. In the coral reef building 1, as will be described later, the corrugation and growth are promoted by using a galvanic anode method. Become.

  The coral reef structure 1 supports the coral active deposit 11 and the anode 10 using a pair of porous supports 2 made of porous concrete as support means. The support 2 may be formed by reinforcing porous concrete with a reinforcing bar or the like, or by applying ceramic powder or porous concrete to an iron plate.

  The pair of supports 2 are connected by a bottom side connecting member 3. The bottom side connecting member 3 may be configured integrally with the support body 2 or may be configured by combining, for example, steel frames in a truss shape. In the coral reef structure 1 according to this embodiment, the coral active landing floor 11 is disposed between the pair of supports 2, and the coral active landing floor 11 is also disposed on the side portion 2 </ b> S of the support 2. The anode 10 is disposed so as to connect the pair of support bodies 2 to each other, and is also disposed on the side portion 2S of the support body 2.

  In a space surrounded by the pair of support bodies 2 and the bottom side connecting member 3, for example, an artificial lie block 4 is disposed and used as a weight of the coral reef structure 1. Moreover, coral can also be alive on the live block 4. It is preferable to provide an opening at the end of the coral reef structure 1 so that the lie block 4 can be taken out of the space and a new lie block 4 can be placed in the space.

  Since the coral active bed 11 serves as a cathode for the anode 10, a material having a natural potential nobler than that of the galvanic anode is used. In this embodiment, the coral active bed 11 is a net-like structure in which linear cathode materials are combined in a lattice pattern. The coral active bed 11 may be used while the cathode material is in a net form, but the surface of the cathode material may be used, for example, by covering the surface with ceramic powder or porous concrete to form a porous coating layer. Good. By doing so, the skeleton of the coral C and the covering layer are easily adapted to each other, so that the coral C is easily entrapped on the coral active floor 11. In addition, coral larvae (planura larvae) and the like are easily settled naturally.

  In addition, a cathode made of, for example, steel or stainless steel is provided inside the porous support 2 made of porous concrete, and the cathode 2 and the anode 10 are electrically connected to each other to provide the support 2. And the coral active floor may be configured as one body. In this case, the anode 10 and the cathode are structured to ensure current conduction. For example, as described above, the support 2 is made of a porous material, and the cathode is disposed therein. If it does in this way, since the skeleton of coral C and a porous body become easy to adjust, coral C becomes easy to be entrapped on the surface of support 2.

  The anode 10 is configured by forming a rod-shaped member in an arc shape, and the plurality of anodes 10 are attached to the support 2 at predetermined intervals in the longitudinal direction of the support 2. The shape of the anode 10 is not limited to this. The number of anodes 10 is appropriately determined depending on the number of coral active beds 11, the current density of the current flowing from the anodes 10 toward the coral active beds 11, and the like. Here, the anode 10 and the coral active bed 11 are electrically connected.

  FIG. 4-1 is a conceptual diagram for explaining the galvanic anode method employed in the coral reef structure according to the first embodiment. In the coral reef structure 1 according to this embodiment, an electrodeposited mineral is deposited on the coral active landing 11 as a cathode by electrodeposition using a so-called galvanic anode method, and the coral active landing 11 is landed. Promote the survival and growth of coral C. In the following description, since the cathode is the coral active bed 11, the coral active bed 11 and the cathode are synonymous.

As shown in FIG. 4A, the coral active floor 11 for bottoming the coral C is used as a cathode, and a metal having a lower natural potential than the cathode (coral active floor 11) is disposed as an anode (a galvanic anode) 10. To do. Then, the anode 10 and the cathode (coral active bed 11) are connected by the conductor l, and the anode 10 and the cathode (coral active bed 11), and the electrolyte interposed between the anode 10 and the cathode (coral active bed 11) ( Current is passed between the anode 10 and the cathode (coral active bed 11) using the battery action of seawater. As a result, calcareous (electrodeposited minerals) such as CaCO ₃ , Mg (OH) ₂ , and MgCO ₃ are deposited on the cathode (coral active deposit 11), and the surrounding environment of the cathode (coral active deposit 11) is alkalized. Facilitate.

  The calcareous matter deposited on the cathode (coral active bed 11) is a base on which coral C is activated. Further, when alkalinization of the surrounding environment of the cathode (coral active bed 11) is promoted (that is, the pH of the seawater around the cathode increases), the energy required for calcification of the coral C becomes small, so the coral C Improve the growth rate and tolerance of With these actions, the coral aquaculture apparatus according to this embodiment can promote the growth of the coral C and more reliably establish the coral on the floor 11.

In the case of using the galvanic anode method, in order to promote the precipitation of calcareous material on the cathode (coral active bed 11) and the alkalinization of the environment around the cathode (coral active bed 11), Kind becomes important. If the cathode potential is about −1000 mV (saturated permeation electrode standard, hereinafter omitted) and noble (high potential), the reaction at the cathode (coral active bed 11) is generally an oxygen reduction reaction represented by the formula (1). The current density is about 100 mA / m ² . The anode 10 corresponding to this reaction is made of an aluminum-based material, but the deposition of calcareous material is delayed at the above current value. On the other hand, since the consumption of the anode 10 is relatively small, the life of the anode 10 is prolonged.
O ₂ + H ₂ O + 4e ⁻ → 4OH ⁻ (1)

On the other hand, if the cathode potential is lower than −1100 mV (potential is lower), the reaction at the cathode (coral active bed 11) is a hydrogen generation reaction represented by the general formula (2), and the magnitude of the current density is 1000 mA / m ² or more is also possible. The anode 10 corresponding to this reaction is made of a magnesium-based material. At the current value, calcareous precipitation is accelerated, but the galvanic anode is greatly consumed, and the life of the anode 10 is shortened.
2H ₂ O + 2e ⁻ → H ₂ + 2OH ⁻ (2)
In this embodiment, the material of the anode 10 is selected and the shape, arrangement, etc. of the anode 10 are changed in consideration of calcareous precipitation, consumption of the anode 10, or suppression of adhesion of algae, shellfish, and the like. . For example, in the initial stage, the current flowing from the anode to the cathode is increased to suppress adhesion of algae and shellfish, and after a certain period of time, the current is decreased to promote coral growth.

In order to promote the growth of coral C, it is preferably at least larger than the current density (about 100 mA / m ² ) in normal cathodic protection. Preferably, it is not less than 2 times and not more than 10 times the current density in normal cathodic protection. In order to realize this, the cathode potential may be set lower than about −1000 mV. In order to promote the growth of the coral C, the material and arrangement of the anode 10 that can realize the current density are selected.

  Moreover, when promoting the growth of the coral C, it is preferable to change the current density according to the flow velocity of the sea area where the coral C is grown. More specifically, the current is increased as the flow velocity in the sea area where the coral C is grown increases. Thereby, it is possible to more surely promote the precipitation of calcareous material on the cathode (coral active bed 11) and the alkalinization of the environment around the cathode (coral active bed 11).

  Here, the material of the cathode (coral active bed 11) may be any metal whose natural potential is noble (higher potential) than that of the anode 10, but in consideration of using it in seawater, It is preferable to use a metal having high corrosion resistance such as titanium (Ti) or a titanium compound. Further, as described above, the anode 10 uses a metal on the base side (potential is lower) than the cathode (coral active bed 11). Among these metals, the material constituting the anode 10 is, for example, zinc, zinc alloy (zinc-based), aluminum, aluminum alloy (aluminum-based), taking into account the magnitude and life of the applied current. At least one of magnesium and a magnesium alloy (magnesium-based) is used.

  In order to flow a large current, a magnesium system is used for the anode 10, and when the current may be smaller than this, a zinc system or an aluminum system is applied to the anode 10. However, the magnesium system with a large current has a short life, and the zinc system and the aluminum system with a small current have a long life. For the purpose of maintaining a large current in the initial stage and a medium current in the latter half, a combination of magnesium and zinc or a combination of magnesium and aluminum may be used.

  In the coral reef structure 1 ′ according to this embodiment, the cathode and the coral active landing bed 11 are the same, but the cathode and the coral active landing bed 11 may be separately prepared. For example, a cathode made of steel or stainless steel and an anode 10 are prepared, and, for example, a sheet in which a metal wire, fiber, or the like is coated with ceramic powder is disposed in the vicinity of the cathode as a coral active deposit 11. In this case, if the coral active deposit 11 is disposed between the anode 10 and the cathode, the electrodeposited mineral can be deposited on the coral active deposit 11 more efficiently, so that the growth of the coral C can be further promoted. ,preferable.

  FIG. 4-2 is a conceptual diagram illustrating another configuration example of the coral reef structure according to the first embodiment. Like the coral reef structure 1 ′ shown in FIG. 4B, the magnitude of the current flowing between the anode 10 and the coral active floor 11 can be controlled between the coral active floor 11 and the anode 10 as the cathode. A simple current control means (for example, a diode or a resistor) 20 may be provided. For example, a diode is inserted in series with respect to the anode 10 and the coral active bed 11. As a result, the current flowing between the anode 10 and the coral active bed 11 can be adjusted according to the sea conditions such as the flow velocity and salinity of the sea where the polyps are cultivated, so the area around the cathode is optimal for growing polyps according to the sea conditions Environment.

  In this embodiment, the coral C is directly entrapped on the coral survival landing 11. For example, the coral planula larvae captured on a ceramic sheet or the like and placed on the coral survival landing floor 11 are placed on the planula. The survival and growth of polyps transformed from larvae may be promoted. Even in this case, deposition of electrodeposited minerals by electrodeposition and alkalinization of the surrounding environment of the coral active deposition bed 11 are promoted, so that the growth of coral C is promoted.

  FIG. 5 is a conceptual diagram showing a configuration example when the anode can be replaced. In this configuration, a mounting seat 5 for the anode 10 is provided on the support 2, and the anode 10 and the end are inserted into the mounting seat 5, so that the anode 10 is detachably mounted on the support 2. When replacing the anode 10, the anode 10 is removed from the mounting seat 5 and a new anode 10 is fitted into the mounting seat 5. Thereby, even when the anode 10 is consumed, it can be easily replaced with a new anode 10. Even if the mounting seat 5 is not provided, a mounting hole for inserting the end of the anode 10 into the support 2 may be provided so that the anode 10 can be detachably mounted on the support 2. The anode 10 attached to the side portion 2S of the support 2 has the same configuration.

  6 to 8 are conceptual diagrams showing other configuration examples when the anode is replaceable. In this configuration, a plurality of anode elements 10E are connected to form the anode 10 ′, and the anode 10 ′ is disposed in the anode housing 6 made of an insulator. As shown in FIGS. 6 and 8, the anode housing 6 has a net-like tube formed in an arc shape, and can accommodate the anode 10 ′ therein. Each end of the anode housing 6 is attached to each of the pair of supports 2 so as to connect the pair of supports 2. Moreover, the opening 6 in is provided in the anode housing 6, and the anode 10 a is taken in and out of the anode housing 6.

  As shown in FIG. 7, the anode 10 ′ connects a plurality of anode elements 10 </ b> E with conducting wires 13 made of a conductor. Thereby, all of the plurality of anode elements 10E are electrically connected, and the shape of the anode 10a as a whole can be freely changed to some extent by bending the portion of the conducting wire 13. When the coral reef structure 1 (see, for example, FIG. 1) is used, the anode 10 ′ is inserted into the anode housing 6 from the opening 6 in provided in the anode housing 6 and arranged. Since the anode 10 ′ is bent at the portion of the conducting wire 13, the anode 10 ′ disposed in the anode housing 6 is disposed along the arcuate anode housing 6 as shown in FIG. 6. When replacing the consumed anode 10 ′, the consumed anode 10 ′ is taken out from the opening 6 in and a new anode 10 ′ is inserted into the anode housing 6 from the opening 6 in. Thereby, even when the anode 10 ′ is consumed, it can be easily replaced with a new anode 10 ′.

  As described above, in this embodiment, the coral active floor is used as a cathode, and the anode having a lower natural potential than the coral active floor and electrically connected to the coral active floor is installed on the seabed together with the coral active floor. Is supported by the support means. Then, a current is passed from the anode toward the coral active bed by a so-called galvanic anode method to promote the growth of the corals that have been activated on the coral active bed. Thus, since the so-called galvanic anode method is used, coral growth can be promoted with a simple configuration.

  In addition, coral reef structures are easy to increase in size due to their simple structure, can be easily transported to the installation sea area, and can be introduced into the installation sea area for installation. Can be installed. In this way, if this coral reef-building structure is introduced, the sea area where coral reefs have declined, such as coral community whitening and coral death, can be extensively restored. In addition, what is provided with the structure similar to the structure disclosed in Embodiment 1 has an effect | action similar to Embodiment 1, and an effect. The configuration disclosed in the first embodiment can also be applied to the following embodiments.

(Embodiment 2)
The second embodiment has the same configuration as that of the first embodiment, but is different in that a reticulated coral active floor is attached to an arcuate support. Other configurations are the same as those of the first embodiment.

  FIG. 9 is a front view illustrating a configuration of a coral reef structure according to the second embodiment. FIG. 10 is a plan view showing a configuration of the coral reef structure according to the second embodiment. FIG. 11 is a side view illustrating the configuration of the coral reef structure according to the second embodiment. The coral reef structure 1a includes a reticulated coral active landing floor 11a. And the coral reef structure 1 is installed in the seabed B, and the coral C cultivated on the coral active landing floor 11a is nurtured. This coral reef building 1 also promotes coral survival and growth using the galvanic anode method in the same manner as the coral reef building 1 according to Embodiment 1 (see FIG. 1 and the like) The coral active bed 11a becomes a cathode for the anode 10a.

  The coral reef building structure 1a includes, for example, a support body 7 in which a columnar steel or stainless steel is formed in an arc shape as a support means, and the support body 7 supports the net-like coral active deposit 11a and the anode 10a. A plurality of supports 7 are arranged orthogonal to the axial direction (longitudinal direction) of the columnar anode 10a and toward the axial direction (longitudinal direction) of the anode 10a.

  A bottom plate 9 is attached to each end of the support 7. The support 7 and the bottom plate 9 are connected to each other by a connecting plate 8 that is a reinforcing member, and the strength at the mounting portion of the support 7 is improved. The net-like coral active bed 11 a is disposed between adjacent supports 7 and is fixed to the supports 7. The anode 10 a is fixed to the support 7 via the anode support member 12. Similar to the coral reef structure 1 according to the first embodiment, the coral active landing bed 11a serves as a cathode in the galvanic anode method and is electrically connected to the anode 10a.

  When the coral reef structure 1a according to this embodiment is installed on the seabed B, for example, an artificial live block 4 is placed on the bottom plate 9 to form the weight of the coral reef structure 1a. . Since the coral reef structure 1a does not include a concrete structure and has a small mass, it is preferable to stabilize the coral reef structure 1a using the live block 4. Moreover, coral can also be alive on the live block 4.

  FIG. 12 and FIG. 13 are conceptual diagrams showing configuration examples when the anode can be replaced. In this configuration, a plurality of anode elements 10E are connected to form the anode 10a ′, and the anode 10a ′ is disposed in the anode housing 15 made of an insulator. As shown in FIGS. 12 and 13, the anode storage body 15 is constituted by a net-like cylinder so that the anode 10 a ′ can be stored therein. The anode housing 15 is fixed to the support 7 via the anode support member 12. In addition, openings are provided at both ends of the anode housing 15, and the anode 10 a ′ is taken in and out of the anode housing 15.

  As shown in FIG. 12, the anode 10 a ′ connects the plurality of anode elements 10 </ b> E with a conductive wire 13 made of a conductor. Thereby, all of the plurality of anode elements 10E are electrically connected. When using the coral reef structure 1 a (see, for example, FIG. 9), the anode 10 a ′ is inserted into the anode housing 15 from the end of the anode housing 15 and disposed. And the conducting wire 13 of anode 10a 'is electrically connected through the connector 16 with the conducting wire 14 connected to the coral active bed 11a which is a cathode. Thus, even when the anode 10a ′ is consumed, it can be easily replaced with a new anode 10a ′.

  The anode arranged in the anode housing 15 may be a single rod-like thing. However, since the longitudinal dimension of the coral reef structure 1a is as large as about 10 m to 30 m, the length of the anode is increased, which is inconvenient for replacement and handling. Like the anode 10 a ′ according to this embodiment, the anode 10 a ′ can be bent at the portion of the conductor 13 by connecting a plurality of anode elements 10 E with the conductor 13 formed of a conductor. As a result, the anode 10a 'can be folded when being carried to the sea area where the coral reef structure 1a is installed, so that the storage space can be reduced, and replacement and handling are facilitated.

  As described above, in this embodiment, the coral active floor is used as a cathode, and the anode having a lower natural potential than the coral active floor and electrically connected to the coral active floor is installed on the seabed together with the coral active floor. Is supported by the support means. Then, a current is passed from the anode toward the coral active bed by a so-called galvanic anode method to promote the growth of the corals that have been activated on the coral active bed. Thus, since the so-called galvanic anode method is used, coral growth can be promoted with a simple configuration.

  In addition, coral reef structures are easy to increase in size due to their simple structure, can be easily transported to the installation sea area, and can be introduced into the installation sea area for installation. Can be installed. In this way, if this coral reef-building structure is introduced, the sea area where coral reefs have declined, such as coral community whitening and coral death, can be extensively restored.

  Furthermore, since the coral active floor is attached along the support means in which the columnar members are formed in an arc shape, the coral reef structure can be reduced in weight. In addition, what is provided with the structure similar to the structure disclosed in Embodiment 2 has an effect | action similar to Embodiment 2, and an effect. The configuration disclosed in the second embodiment can also be applied to the following embodiments.

(Embodiment 3)
FIG. 14 and FIG. 15 are explanatory diagrams illustrating an example of the coral survival floor according to the third embodiment. FIG. 16 is an explanatory view showing a coral alive floor in a state where the corals are alive. FIG. 17 and FIG. 18 are explanatory views showing other examples of the coral survival floor according to the third embodiment. FIG. 14 shows a state in which the coral resurfacing structure according to the third embodiment is applied to the coral reef building structure according to the first embodiment, and FIG. 15 is an implementation on the coral reef structure according to the second embodiment. The state which applied the coral hot landing which concerns on form 3 is shown.

  In the third embodiment, another configuration of the coral hot landing floor provided in the coral reef structure will be described. This coral active bed 11b bends a net-like member made of a cathode material (metal such as steel or stainless steel) in the galvanic anode method to form ridges M and valleys V alternately. As for the coral active floor 11b shown in FIG.14, FIG.15, FIG.16, the peak part M and the trough part V are formed in the curved surface form. Moreover, as for the coral active floor 11c shown in FIG. 17, the peak part M and the trough part V are formed in linear form.

  The coral active bed 11d shown in FIG. 18 is similar to the coral active beds 11b and 11c shown in FIGS. 14 to 17 by bending a net-like member made of a cathode material into a wave shape, Are alternately formed as a bottoming means. This coral survival floor 11d has a cross-sectional shape in which substantially U-shapes are continuous. Thereby, as for this coral active landing floor 11d, the peak part M and the trough part V are formed in planar shape. Thus, the case where the peak M and the valley V are formed in a planar shape is also included in the wavy concept.

  Since the coral survival beds 11b, 11c, and 11d are easy to gather coral planula larvae in the valley V, the capture efficiency of the planula larvae in the sea is improved. Moreover, as shown in FIG. 16, the coral C settled in the valley part V is protected from the fish F that damages the coral C with the mountain part M serving as a protection part. At this time, the opening dimension H of the valley V (corresponding to the distance between the adjacent peaks M) is determined on the basis of the size of fish that eats planula larvae, polyps, and the like.

  FIG. 19 is an explanatory diagram illustrating an example in which an example of coral laying floor according to Embodiment 3 is attached to a side portion of a support provided in a coral reef structure. FIG. 19 shows a state in which the coral hot landing floor 11c shown in FIG. 17 is attached to the side portion of the support provided in the coral reef structure according to the first embodiment. In the coral reef building structure 1b, a side portion 2S ′ of a concrete support 2 ′ is formed in a step shape, and a coral active floor 11c shown in FIG. 17 is attached thereto. In this way, since the side portion 2S ′ of the support 2 ′ matches the shape of the coral active landing floor 11c, the coral active landing floor 11c can be stably attached to the side 2S ′ of the support 2 ′.

(Modification)
20-22 is explanatory drawing which shows the coral survival dressing which concerns on the modification of Embodiment 3. As shown in FIG. FIG. 23 is an explanatory view showing a coral alive floor in a state where the corals are alive. FIG. 20 shows a state in which the coral active landing according to the modification of the third embodiment is applied to the coral reef building structure according to the first embodiment, and FIG. 21 shows a coral reef structure according to the second embodiment. The state which applied the coral active landing which concerns on the modification of Embodiment 3 to a thing is shown.

  This coral active deposit 11f is provided with a plurality of mesh-like and plate-like members made of a cathode material (metal such as steel or stainless steel) in the galvanic anode method, and the end of the member is a coral reef structure. It arrange | positions in a blind shape toward the outer side of 1c, 1d. In the coral reef structure 1 c shown in FIG. 20, a plurality of coral active landing floors 11 f are attached to the frame 17. The coral survival surface 11fp of the coral survival floor 11f is disposed so as to be substantially orthogonal to the frame 17. In the coral reef structure 1 d shown in FIG. 21, a plurality of coral active landing floors 11 f are attached to the support 7. The coral survival surface 11fp of the coral survival floor 11f is attached so as to be substantially orthogonal to the tangent line of the support body 7 at the attachment portion between the coral survival floor 11f and the support body 7 formed in an arc shape.

  Accordingly, the coral reef structures 1c and 1d are configured such that the end portions of the coral active landing floor 11f face the outside of the coral reef structures 1c and 1d. As a result, since the end portion of the coral survival bed 11f protrudes from the coral reef structures 1c and 1d, the coral reef structures 1c and 1d are discharged from the coral reef structures 1c and 1d. The end portion of the floor 11f serves as a protection portion for the coral C, and the coral C can be protected from the fish.

  As mentioned above, in this embodiment, since the coral active flooring is made into a net-like shape or the end of the plate-like member is protruded toward the outside of the coral reef structure, the coral active flooring can be obtained from fish that damages coral. It is possible to protect corals that have settled on the surface. In addition, what is provided with the structure similar to the structure disclosed in Embodiment 3 has an effect | action and effect similar to Embodiment 3. FIG. Further, the configuration disclosed in the third embodiment can also be applied to the following embodiments.

(Embodiment 4)
FIG. 24 and FIG. 25 are explanatory diagrams of the coral hot landing according to the fourth embodiment. In this embodiment, the anode is a coral hot landing floor 10A. The coral active deposition floor 10A, which is an anode, is attached to a net-like cathode 11A configured by combining metal bars and metal wires in a grid pattern. The coral hot landing floor 10A is made of, for example, a steel material. The cathode 11A and the coral active bed 10A are electrically connected.

  The cathode 11A is made of a metal having a higher potential than steel, such as stainless steel or carbon. If the current density flowing from the coral active bed 10A to the cathode 11A is too large, the coral active bed 10A is excessively dissolved. Therefore, the current density is adjusted by the ratio of the area of the coral active bed 10A to the area of the cathode 11A. With such a configuration, the coral may be alive on the coral alive floor 10A and grown in the sea.

  For example, when a structure made of steel is installed in the sea, a portion where the steel is struck with a hammer or the like is activated and easily corroded. In such a portion, a micro cell having the surrounding black skin as a cathode is formed, and corrosion of the steel material is promoted. And the phenomenon that a coral settles well and grows in the part which such steel materials corroded is confirmed. Therefore, if the coral active landing floor 10A that is an anode is made of steel and the cathode 11A is made of a metal having a potential higher than that of steel, the corrosion of the coral active landing floor 10A is promoted, so that There is an advantage that the growth of established planula larvae is promoted.

  As described above, the coral reef-building structure according to the present invention is useful for artificially proliferating corals, and in particular, covers a wide range of sea areas where coral reefs such as coral community whitening and coral death have occurred. Suitable for repair over.

It is a front view which shows the structure of the structure for coral reefs concerning Embodiment 1. FIG. It is a top view which shows the structure of the structure for coral reefs concerning Embodiment 1. FIG. It is a side view which shows the structure of the structure for coral reefs concerning Embodiment 1. FIG. It is a conceptual diagram for demonstrating the galvanic anode method employ | adopted with the structure for coral reefs concerning Embodiment 1. FIG. It is a conceptual diagram which shows the other structural example of the structure for coral reefs concerning Embodiment 1. FIG. It is a conceptual diagram which shows the structural example at the time of making an anode exchangeable. It is a conceptual diagram which shows the other structural example at the time of making an anode exchangeable. It is a conceptual diagram which shows the other structural example at the time of making an anode exchangeable. It is a conceptual diagram which shows the other structural example at the time of making an anode exchangeable. It is a front view which shows the structure of the structure for coral reefs concerning Embodiment 2. FIG. It is a top view which shows the structure of the structure for coral reefs concerning Embodiment 2. FIG. It is a side view which shows the structure of the structure for coral reefs concerning Embodiment 2. FIG. It is a conceptual diagram which shows the structural example at the time of making an anode exchangeable. It is a conceptual diagram which shows the structural example at the time of making an anode exchangeable. It is explanatory drawing which shows an example of the coral hot landing based on Embodiment 3. FIG. It is explanatory drawing which shows an example of the coral hot landing based on Embodiment 3. FIG. It is explanatory drawing which shows the coral active floor in the state where the coral was settled. It is explanatory drawing which shows the other example of the coral hot landing based on Embodiment 3. FIG. It is explanatory drawing which shows the other example of the coral hot landing based on Embodiment 3. FIG. It is explanatory drawing which shows the example attached to the side part of the support body with which an example of the coral active landing which concerns on Embodiment 3 is provided with the structure for coral reefs. It is explanatory drawing which shows the coral hot landing based on the modification of Embodiment 3. It is explanatory drawing which shows the coral hot landing based on the modification of Embodiment 3. It is explanatory drawing which shows the coral hot landing based on the modification of Embodiment 3. It is explanatory drawing which shows the coral active floor in the state where the coral was settled. It is explanatory drawing of the coral active landing which concerns on Embodiment 4. FIG. It is explanatory drawing of the coral active landing which concerns on Embodiment 4. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1 ', 1a, 1b, 1c, 1d Coral reef structure 2, 2', 7 Support body 2S, 2S 'Side part 3 Bottom side connection member 4 Live block 5 Mounting seat 6, 15 Anode housing 8 Connecting plate 9 Bottom plate 10A Coral active deposit 10E Anode element 10, 10a, 10a ′ Anode 11A Cathode 11, 11a, 11b, 11c, 11d, 11f, Coral active floor 11fp Coral active surface 12 Anode support member 13, 14 Conductor

Claims (10)

Coral live floor where corals live,
A natural potential is lower than that of the coral active bed and the anode is electrically connected to the coral active bed,
A support means installed on the sea floor and supporting the coral alive floor and the anode in the sea;
Coral reef structure characterized by containing.   2. The coral reef structure according to claim 1, wherein the support means is a pair of porous members, and the coral survival bed is disposed between the pair of porous members.   The coral reef building structure according to claim 1 or 2, wherein the anode is detachably attached to the support means.   2. The coral reef structure according to claim 1, wherein the support means is an arc-shaped member, and the coral survival floor is disposed along the arc-shaped member.   5. The coral reef structure according to claim 4, wherein the anode is disposed inside the coral laying floor disposed along the support means.   6. The anode according to claim 1, wherein the anode is formed of a net-like insulator and is attached to the support means via an anode storage body that stores the anode inside. Coral reef structure.   The coral reef structure according to any one of claims 1 to 6, wherein a net-like member is formed in a wave shape to form the coral active landing floor.   The end portion of a net-like and plate-like member is protruded toward the outside of the coral reef building structure to form the coral active landing floor, according to any one of claims 1 to 6. Coral reef structure.   The coral reef structure according to any one of claims 1 to 8, wherein a porous coating layer is provided on a surface of the coral active bed.   The coral reef building structure according to any one of claims 1 to 9, wherein a current limiting means is provided between the coral active landing floor and the anode.

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