JP5704558B2 - Artificial reef - Google Patents
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- JP5704558B2 JP5704558B2 JP2010238231A JP2010238231A JP5704558B2 JP 5704558 B2 JP5704558 B2 JP 5704558B2 JP 2010238231 A JP2010238231 A JP 2010238231A JP 2010238231 A JP2010238231 A JP 2010238231A JP 5704558 B2 JP5704558 B2 JP 5704558B2
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- artificial fish
- fish reef
- porous body
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- 241000251468 Actinopterygii Species 0.000 claims description 41
- 238000003780 insertion Methods 0.000 claims description 16
- 230000037431 insertion Effects 0.000 claims description 16
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims description 9
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 9
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 9
- 239000000347 magnesium hydroxide Substances 0.000 claims description 9
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 229910001385 heavy metal Inorganic materials 0.000 description 8
- 239000004567 concrete Substances 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 241000195493 Cryptophyta Species 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 235000013305 food Nutrition 0.000 description 4
- 230000012010 growth Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 241000192710 Microcystis aeruginosa Species 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000008635 plant growth Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 241001474374 Blennius Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 241000219109 Citrullus Species 0.000 description 1
- 235000012828 Citrullus lanatus var citroides Nutrition 0.000 description 1
- 241000257465 Echinoidea Species 0.000 description 1
- 229940036811 bone meal Drugs 0.000 description 1
- 239000002374 bone meal Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Landscapes
- Artificial Fish Reefs (AREA)
Description
本発明は、人工魚礁に関する。さらに詳しくは、海底に設置して、藻場を形成し、小魚等を集めて保護育成する人工魚礁に関する。 The present invention relates to an artificial reef. More specifically, the present invention relates to an artificial fish reef that is installed on the seabed to form a seaweed bed and collect and protect and grow small fish.
コンクリートブロック等で形成された人工魚礁を海底に設置して、藻場を形成し、小魚等を集めて保護育成する技術が知られている（例えば特許文献１，２）。また、魚の餌となる餌料生物の着生や植物育成を促進するために、人工魚礁をポーラスコンクリート等の多孔質体で形成することも知られている。 Techniques are known in which artificial fish reefs formed of concrete blocks or the like are installed on the seabed to form algae beds and collect and protect and cultivate small fish (for example, Patent Documents 1 and 2). It is also known to form artificial reefs with porous bodies such as porous concrete in order to promote the growth of feed organisms that serve as fish food and the growth of plants.
本願発明者は、ヒドロキシアパタイトや水酸化マグネシウム等の水質改善機能を有する機能性材料を含有する機能性多孔質体を発明している。ヒドロキシアパタイトは重金属を吸着するので、底泥に蓄積された重金属を吸着し、底質を改善することができる。また、水酸化マグネシウムはプラスに帯電するので、マイナスに帯電する植物プランクトンを吸着し、アオコを減少させ、水質を改善することができる。したがって、機能性多孔質体を用いて人工魚礁を形成すれば、小魚等を保護育成できるだけでなく、水質を改善することができる。 The inventor of the present application has invented a functional porous body containing a functional material having a water quality improving function such as hydroxyapatite or magnesium hydroxide. Since hydroxyapatite adsorbs heavy metals, it can adsorb heavy metals accumulated in the bottom mud and improve the sediment quality. In addition, since magnesium hydroxide is positively charged, it can adsorb phytoplankton that is negatively charged, reduce water-bloom, and improve water quality. Therefore, if an artificial fish reef is formed using a functional porous body, not only can small fish and the like be protected and nurtured, but also the water quality can be improved.
しかるに、機能性多孔質体は重金属やアオコを吸着するといずれ飽和し、それらを吸着する効果を発揮できなくなる。この場合、機能性多孔質体を交換すればよいが、人工魚礁をすべて取り換えることは作業が大変であるばかりでなく、せっかく着生した餌料生物や藻が失われ、集まってきた小魚等にも影響を及ぼすこととなる。そのため、飽和した機能性多孔質体のみを交換することが望まれる。 However, when the functional porous body adsorbs heavy metals and blue sea urchins, it will eventually be saturated, and it will not be possible to exhibit the effect of adsorbing them. In this case, it is only necessary to replace the functional porous body, but replacing all the artificial reefs is not only difficult, but also the prey that has grown and the algae have been lost and collected to small fish that have gathered Will also have an effect. Therefore, it is desired to replace only the saturated functional porous body.
本発明は上記事情に鑑み、飽和した機能性多孔質体を交換することのできる人工魚礁を提供することを目的とする。 In view of the above circumstances, an object of the present invention is to provide an artificial fish reef that can exchange a saturated functional porous body.
第１発明の人工魚礁は、人工魚礁本体に機能性多孔質体で形成された交換部材が着脱可能に取り付けられており、前記人工魚礁本体は、基礎部と、該基礎部の上に載せられた屋根部とで構成されており、前記基礎部は、平面視六角形の筒状であり、側面に孔が形成されており、前記屋根部は、中空の六角錐であり、頂点に開口部が形成されていることを特徴とする。
第２発明の人工魚礁は、第１発明において、前記機能性多孔質体には、ヒドロキシアパタイトおよび／または水酸化マグネシウムが含有されていることを特徴とする。
第３発明の人工魚礁は、第１または第２発明において、前記人工魚礁本体に挿入孔が形成されており、前記交換部材は、前記挿入孔に挿入可能な軸部と、該軸部の一端に機能性多孔質体で形成された突起部とで構成されていることを特徴とする。
第４発明の人工魚礁は、第１、第２または第３発明において、前記人工魚礁本体の全部または一部が多孔質体で形成されていることを特徴とする。
In the artificial reef of the first invention, an exchange member formed of a functional porous body is detachably attached to the artificial reef body, and the artificial reef body is placed on the foundation and the foundation. The base portion has a hexagonal cylindrical shape in plan view, has a hole formed in a side surface, the roof portion is a hollow hexagonal pyramid, and has an opening at the apex. Is formed .
The artificial fish reef of the second invention is characterized in that, in the first invention, the functional porous body contains hydroxyapatite and / or magnesium hydroxide.
The artificial reef of the third invention is the artificial fish reef according to the first or second invention, wherein an insertion hole is formed in the artificial reef body, and the exchange member includes a shaft part that can be inserted into the insertion hole and one end of the shaft part. And a protrusion formed of a functional porous body.
The artificial fish reef of the fourth invention is characterized in that, in the first , second or third invention, all or part of the artificial fish reef body is formed of a porous body .
第１発明によれば、以下の効果を奏する。
ａ）機能性多孔質体で形成された交換部材が着脱可能であるから、機能性多孔質体が飽和した場合に、交換部材のみを交換することができる。そのため、交換作業が容易であり、人工魚礁本体に着生した餌料生物や藻が失われることもなく、集まってきた小魚等に影響を及ぼすことがない。
ｂ）基礎部が平面視六角形であるので、人工魚礁を連設して、設置場所に応じて広くすることができる。また、基礎部と屋根部の形状が平面視六角形で同一であるので海流をスムーズに流すことができる。
ｃ）基礎部の側面に孔が形成されており、屋根部の頂点に開口部が形成されているので、海流が人工魚礁本体の中を下から上へと流れ、揚圧力に対する安定性を向上することができる。また、流動制御機能を有することにより餌料生物の着生が促進される。
第２発明によれば、ヒドロキシアパタイトは重金属を吸着するので、底泥に蓄積された重金属を吸着し、底質を改善することができる。また、水酸化マグネシウムはプラスに帯電するので、マイナスに帯電する植物プランクトンを吸着し、アオコを減少させ、水質を改善することができる。
第３発明によれば、交換部材の軸部を人工魚礁本体の挿入孔に挿入、抜去することで、交換部材を容易に交換することができる。
第４発明によれば、人工魚礁本体が多孔質体で形成されているから、魚の餌となる餌料生物の着生や植物育成を促進することができる。
According to the first invention, the following effects can be obtained.
a) Since the replacement member formed of the functional porous body is detachable, only the replacement member can be replaced when the functional porous body is saturated. Therefore, the replacement work is easy, the feed organisms and algae that have grown on the artificial reef body are not lost, and the collected small fish are not affected.
b) Since the base portion is a hexagonal shape in plan view, an artificial fish reef can be connected continuously and can be widened according to the installation location. Moreover, since the shape of a base part and a roof part is the same in a planar view hexagon, it can flow an ocean current smoothly.
c) Since a hole is formed on the side of the foundation and an opening is formed at the apex of the roof, the ocean current flows from the bottom to the top of the artificial reef body, improving stability against lifting pressure can do. In addition, the formation of feed organisms is promoted by having a flow control function.
According to the second invention, since hydroxyapatite adsorbs heavy metals, it can adsorb heavy metals accumulated in the bottom mud and improve the sediment. In addition, since magnesium hydroxide is positively charged, it can adsorb phytoplankton that is negatively charged, reduce water-bloom, and improve water quality.
According to the third invention, the replacement member can be easily replaced by inserting and removing the shaft portion of the replacement member from the insertion hole of the artificial fish reef body.
According to the fourth invention, since the artificial reef body is formed of a porous body, it is possible to promote the growth of feed organisms and plant growth that serve as fish food .
つぎに、本発明の実施形態を図面に基づき説明する。
図１および図２において、１０は基礎部、２０は屋根部であり、基礎部１０と屋根部２０とで人工魚礁本体１が構成されている。
基礎部１０は平面視六角形の筒状部材であり、鉄筋コンクリートで作られている。そのため、ひび割れ等破損しないような強度を有する。また、各側面の下縁には半円形の孔１１が形成されており、海底とは角に当たる６つの脚１２で接するようになっている。この６つの脚１２が海底に食い込むため、人工魚礁本体１は、急勾配の海底に設置されても、海流にさらされても、滑動、転倒しないような安定性を有する。
Next, an embodiment of the present invention will be described with reference to the drawings.
In FIGS. 1 and 2, reference numeral 10 denotes a base portion, and reference numeral 20 denotes a roof portion. The base portion 10 and the roof portion 20 constitute the artificial fish reef body 1.
The base portion 10 is a cylindrical member having a hexagonal shape in plan view, and is made of reinforced concrete. Therefore, it has the strength that does not break, such as cracks. In addition, a semicircular hole 11 is formed at the lower edge of each side surface, and is in contact with the seabed by six legs 12 that hit the corner. Since the six legs 12 bite into the seabed, the artificial fish reef body 1 has such stability that it does not slide or fall over even when it is installed on a steep seabed or exposed to the ocean current.
屋根部２０は中空の六角錐をしており、基礎部１０の上に載せられ一体化している。基礎部１０との一体化は、鉄筋とモルタルを用いて行っている。なお、ボルト接合などで一体化してもよく、一体化せず、単に基礎部１０の上に屋根部２０を載せるだけでも良い。 屋根部２０の底面と基礎部１０の上面とは、ほぼ同寸法の六角形をしている。したがって、無駄に角張る所がなく、海流をスムーズに流すことができる。また、屋根部２０は、ポーラスコンクリート等の多孔質体で形成されており、魚の餌となる餌料生物の着生や植物育成を促進することができる。 The roof portion 20 has a hollow hexagonal pyramid, and is mounted on and integrated with the base portion 10. Integration with the base 10 is performed using reinforcing bars and mortar. In addition, you may integrate by bolt joining etc., and you may just mount the roof part 20 on the foundation part 10, without integrating. The bottom surface of the roof portion 20 and the top surface of the foundation portion 10 have a hexagonal shape with substantially the same dimensions. Therefore, there is no wasteful corner, and the ocean current can flow smoothly. Moreover, the roof part 20 is formed with porous bodies, such as porous concrete, and can accelerate | stimulate the epiphytic of the feed organism used as a food of a fish, and plant growth.
屋根部２０には、人工魚礁本体１の内外を通じ、海流が通る孔２１が複数ヶ所形成されており、六角錐の頂点にも開口部２２が形成されている。さらに、孔２１、開口部２２とは別に挿入孔２３が複数ヶ所形成されている。本実施形態では、屋根部２０の一面ごとに異なる数の孔２１もしくは挿入孔２３が形成されているが、全ての面に同数の孔２１もしくは挿入孔２３を形成してもよい。 A plurality of holes 21 through which the ocean current passes through the inside and outside of the artificial reef body 1 are formed in the roof portion 20, and an opening 22 is also formed at the apex of the hexagonal pyramid. Further, a plurality of insertion holes 23 are formed separately from the holes 21 and the openings 22. In the present embodiment, a different number of holes 21 or insertion holes 23 are formed on each surface of the roof portion 20, but the same number of holes 21 or insertion holes 23 may be formed on all surfaces.
挿入孔２３には、図３に示す交換部材３０が着脱できるようになっている。交換部材３０は、挿入孔２３に挿入可能な軸部３１と、軸部３１の一端に形成された突起部３２とで構成されており、全体としてキノコ状となっている。軸部３１は挿入孔２３へ挿入するために強度を持たせたコンクリートで形成され、挿入孔２３へ挿入しやすいようにテーパーがつけられている。 The replacement member 30 shown in FIG. 3 can be attached to and detached from the insertion hole 23. The exchange member 30 includes a shaft portion 31 that can be inserted into the insertion hole 23 and a projection portion 32 formed at one end of the shaft portion 31, and has a mushroom shape as a whole. The shaft portion 31 is made of concrete having a strength for insertion into the insertion hole 23, and is tapered so as to be easily inserted into the insertion hole 23.
突起部３２は、水質改善機能を有する機能性材料を含有する機能性多孔質体で形成されている。機能性多孔質体は、粗骨材である鉄鋼スラグがバインダーで結合され、鉄鋼スラグの間に多数の気孔が形成され、ポーラスコンクリートの様に形成されたものである。バインダーにはセメントと水の他に、ヒドロキシアパタイトや水酸化マグネシウム等の水質改善機能を有する機能性材料が含有されている。もちろん、ヒドロキシアパタイトや水酸化マグネシウム以外の水質改善機能を有する機能性材料を含有する機能性多孔質体で形成してもよい。また、バインダーに使用するセメントには魚類の焼成骨粉が混入されていてもよい。 The protrusion 32 is formed of a functional porous body containing a functional material having a water quality improving function. In the functional porous body, steel slag, which is a coarse aggregate, is bonded with a binder, and a large number of pores are formed between the steel slag and formed like porous concrete. In addition to cement and water, the binder contains a functional material having a water quality improving function such as hydroxyapatite and magnesium hydroxide. Of course, you may form with the functional porous body containing the functional material which has a water quality improvement function other than a hydroxyapatite and magnesium hydroxide. In addition, the cement used for the binder may contain fired bone meal of fish.
ヒドロキシアパタイトは重金属を吸着するので、底泥に蓄積された重金属を吸着し、底質を改善することができる。また、水酸化マグネシウムはプラスに帯電するので、マイナスに帯電する植物プランクトンを吸着し、アオコを減少させ、水質を改善することができる。そのため、突起部３２は、魚の餌となる餌料生物の着生を促進することができるとともに、水質を改善することができる。 Since hydroxyapatite adsorbs heavy metals, it can adsorb heavy metals accumulated in the bottom mud and improve the sediment quality. In addition, since magnesium hydroxide is positively charged, it can adsorb phytoplankton that is negatively charged, reduce water-bloom, and improve water quality. Therefore, the protrusion 32 can promote the growth of feed organisms that serve as fish food, and can improve water quality.
また、鉄鋼スラグ、ヒドロキシアパタイト、水酸化マグネシウムはいずれも産業副産物であるので、機能性多孔質体の製造による環境負荷が少ない。また、バインダーに使用するセメントに魚類の焼成骨粉を混入した場合には、適正な処理と再利用が求められている魚類の骨を利用できるのであるから、廃棄物の再資源化を促進し、新たな有価物として活用することができる。 In addition, since iron and steel slag, hydroxyapatite, and magnesium hydroxide are all industrial by-products, there is little environmental burden due to the production of the functional porous body. In addition, when the bone bone powder of fish is mixed in the cement used for the binder, it is possible to use the bones of fish that are required to be properly treated and reused. It can be used as a new valuable resource.
さらに、交換部材３０の軸部３１を挿入孔２３に挿入、抜去することで、交換部材３０を容易に交換することができる。そのため、突起部３２の機能性多孔質体が重金属やアオコを吸着して飽和した場合に、交換部材３０のみを交換することができる。人工魚礁全体を交換する場合に比べて交換作業が容易であり、人工魚礁本体に着生した餌料生物や藻が失われることもなく、集まってきた小魚等に影響を及ぼすことがない。 Furthermore, the replacement member 30 can be easily replaced by inserting and removing the shaft portion 31 of the replacement member 30 into and from the insertion hole 23. Therefore, only the replacement member 30 can be replaced when the functional porous body of the projecting portion 32 is saturated by adsorbing heavy metals and watermelons. Compared with the case where the entire artificial reef is replaced, the replacement work is easier, and the feed organisms and algae that have grown on the artificial reef body are not lost, and the collected small fish are not affected.
図４および図５に示すように、基礎部１０の上面には、基礎部１０の６面の側壁に連続する板状部材１３が形成されている。板状部材１３により、基礎部１０の強度が増すとともに、人工魚礁本体１に集まってきた小魚等が住処とすることができる。したがって、人工魚礁本体１は、小魚等にとって餌場となるとともに、生育場としても機能する。 As shown in FIGS. 4 and 5, a plate-like member 13 that is continuous with the six side walls of the base portion 10 is formed on the upper surface of the base portion 10. The plate-like member 13 increases the strength of the foundation 10 and allows small fish or the like gathered in the artificial reef body 1 to be a residence. Accordingly, the artificial reef body 1 serves as a feeding ground for small fish and also functions as a growth ground.
また、板状部材１３の中央には孔１４が形成されている。基礎部１０の孔１１から人工魚礁本体１の内部に流入した海流は、孔１４を通り、孔２１、開口部２２、および交換部材３０が挿入されていない挿入孔２３から外に流出することができる。すなわち、海流が人工魚礁本体１の中を下から上へと流れ、海水の入れ替えができる。このように、流動制御機能を有することにより餌料生物の着生が促進される。 A hole 14 is formed in the center of the plate-like member 13. The ocean current that has flowed into the artificial reef body 1 from the hole 11 of the base portion 10 passes through the hole 14 and flows out from the insertion hole 23 in which the hole 21, the opening 22, and the replacement member 30 are not inserted. it can. That is, the ocean current flows through the artificial reef body 1 from the bottom to the top, and the seawater can be replaced. In this way, the formation of feed organisms is promoted by having a flow control function.
また、人工魚礁本体１は、その中を海流が下から上へと流れる構造であるから、従来の浅海用人工魚礁では対応が困難であった揚圧力に対する安定性を向上することができる。 In addition, since the artificial reef body 1 has a structure in which the ocean current flows from the bottom to the top, the stability to the lifting pressure, which is difficult to cope with with the conventional shallow sea artificial reef, can be improved.
図６に示すように、基礎部１０が平面視六角形であるので、人工魚礁本体１を隙間なく連設して、設置場所に応じて広くすることができる。このとき、基礎部１０に形成された孔１１は、隣接する人工魚礁の基礎部１０の孔１１と接続するので、連設した全ての人工魚礁の海水の入れ替えが可能となる。 As shown in FIG. 6, since the base portion 10 has a hexagonal shape in plan view, the artificial reef body 1 can be connected continuously without any gap and can be widened according to the installation location. At this time, since the hole 11 formed in the base part 10 is connected to the hole 11 of the base part 10 of the adjacent artificial fish reef, the seawater of all the artificial fish reefs arranged in series can be replaced.
なお、基礎部１０を平面視四角形としても連設することはできるが、角部が欠けやすいため好ましくない。本実施形態のように平面視六角形とすれば角部が120°と鈍角となるため欠けにくい。また、平面視円形とすれば欠けにくくなるが、型枠費が高くなるため経済的には好ましくない。 In addition, although the base part 10 can be continuously provided even if it is a planar view square shape, since a corner | angular part tends to be missing, it is not preferable. If the hexagonal shape is used in a plan view as in the present embodiment, the corner portion becomes an obtuse angle of 120 °, which is difficult to chip. Moreover, if it is a circular shape in plan view, it will be difficult to chip, but it is not economically preferable because the cost of the formwork becomes high.
（試験）
つぎに、本発明に係る人工魚礁の流動制御機能に関する水理実験について説明する。
試験は、可変式開水路内に本発明に係る人工魚礁の模型（1/15）を設置し、染料投入法によって水流可視化を行った。
流動制御機能の水理実験を行った結果、図７に示すように、模型高さの約１３倍の後流域形成範囲が確認された。これより、既存の技術（角型ブロック）に比べて後流域形成範囲が５倍以上広がることが検証された。また、模型の流動制御機能によって顕著な渦の発生が認められ、人工魚礁を形成する多孔質体が、海藻胞子の付着基質として有効であることが推察された。
(test)
Next, hydraulic experiments relating to the flow control function of the artificial reef according to the present invention will be described.
In the test, an artificial fish reef model (1/15) according to the present invention was installed in a variable open channel, and the water flow was visualized by a dye addition method.
As a result of conducting a hydraulic experiment of the flow control function, as shown in FIG. 7, a wake region formation range of about 13 times the model height was confirmed. From this, it was verified that the rear basin formation range is expanded more than 5 times compared with the existing technology (square block). In addition, remarkable vortex generation was observed due to the flow control function of the model, and it was speculated that the porous body forming the artificial reef was effective as an attachment substrate for seaweed spores.
１ 人工魚礁本体
１０ 基礎部
１１ 孔
２０ 屋根部
２１ 孔
２２ 開口部
２３ 挿入孔
３０ 交換部材
３１ 軸部
３２ 突起部
DESCRIPTION OF SYMBOLS 1 Artificial reef body 10 Base part 11 Hole 20 Roof part 21 Hole 22 Opening part 23 Insertion hole 30 Replacement member 31 Shaft part 32 Projection part
Claims (4)
前記人工魚礁本体は、基礎部と、該基礎部の上に載せられた屋根部とで構成されており、
前記基礎部は、平面視六角形の筒状であり、側面に孔が形成されており、
前記屋根部は、中空の六角錐であり、頂点に開口部が形成されている
ことを特徴とする人工魚礁。 An exchange member formed of a functional porous body is detachably attached to the artificial fish reef body ,
The artificial fish reef body is composed of a base part and a roof part placed on the base part,
The base portion is a hexagonal cylindrical shape in plan view, and a hole is formed on a side surface,
The artificial fish reef , wherein the roof is a hollow hexagonal pyramid, and an opening is formed at the apex .
ことを特徴とする請求項１記載の人工魚礁。The artificial fish reef according to claim 1.
前記交換部材は、前記挿入孔に挿入可能な軸部と、該軸部の一端に機能性多孔質体で形成された突起部とで構成されている
ことを特徴とする請求項１または２記載の人工魚礁。 An insertion hole is formed in the artificial fish reef body,
The said exchange member is comprised by the axial part which can be inserted in the said insertion hole, and the projection part formed with the functional porous body in the end of this axial part, The Claim 1 or 2 characterized by the above-mentioned. Artificial fish reef.
ことを特徴とする請求項１、２または３記載の人工魚礁。 The artificial fish reef according to claim 1 , 2 or 3 , wherein the whole or part of the artificial fish reef body is formed of a porous body.
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| EP2971364A4 (en) * | 2013-03-15 | 2016-10-12 | Michael Bartkowski | Artificial reef |
| JP6463298B2 (en) * | 2016-04-22 | 2019-01-30 | 株式会社サンクス | Seaweed reef |
| CN109870319B (en) * | 2019-02-21 | 2021-08-31 | 山东省海洋生物研究院 | Biological collection system for migration, settlement and permanent planting of artificial fish reef area |
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| JP4764119B2 (en) * | 2005-09-15 | 2011-08-31 | 田丸 重徳 | Bottom reed aquaculture reef with canopy and method for rearing bottom reed organisms |
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