JP3200421U - Fish run-up smoothing tilting device - Google Patents
Fish run-up smoothing tilting device Download PDFInfo
- Publication number
- JP3200421U JP3200421U JP2015003328U JP2015003328U JP3200421U JP 3200421 U JP3200421 U JP 3200421U JP 2015003328 U JP2015003328 U JP 2015003328U JP 2015003328 U JP2015003328 U JP 2015003328U JP 3200421 U JP3200421 U JP 3200421U
- Authority
- JP
- Japan
- Prior art keywords
- fishway
- board
- irrigation
- tilting device
- fish
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Barrages (AREA)
Abstract
【課題】魚道と固定堰の落差を解消し、魚類の円滑な遡上または降下を補助し、魚類の個体数の維持または復元を図る魚道利水板付属傾斜装置を提供する。【解決手段】固定堰に設置された魚道の上流側に取水に用いる利水板が設けられ、垂直の利水板の高さとほぼ同じ水準の高さを持つ上流部1と、堰に設置された魚道の面とほぼ同じ水準となる下流部を結ぶ傾斜板3と、魚道に接する底面板4から成る。垂直の利水板の下流側に傾斜板3を横断工作物に影響が少ない方法で設置することで、垂直の壁を無くし、魚類の遡上を円滑にするものである。これにより利水と環境保全(魚類等の生息)の両立を図る。【選択図】図1A tilting device with a fishway irrigation board is provided that eliminates the drop between a fishway and a fixed weir, assists smooth upward and downward movement of the fish, and maintains or restores the fish population. A water supply plate used for water intake is provided on the upstream side of a fishway installed in a fixed weir, and an upstream part 1 having a height almost equal to the height of a vertical water supply plate, and a fishway installed in the weir It consists of the inclined plate 3 which connects the downstream part which becomes the same level as this surface, and the bottom plate 4 in contact with the fishway. By installing the inclined plate 3 on the downstream side of the vertical irrigation plate in a manner that has little influence on the crossing workpiece, the vertical wall is eliminated and the fish can be moved up smoothly. In this way, both water utilization and environmental conservation (habitation of fish, etc.) will be achieved. [Selection] Figure 1
Description
本考案は魚が遡上するための魚道利水板付属傾斜装置に関するものである。The present invention relates to an inclination device attached to a fishway irrigation plate for allowing fish to run up.
日本にはアユやサケなど河川を遡上・降下する回遊魚が多く生息している。灌漑用水を目的とした河川横断構造物(堰)はこれを阻害するため、近年は施設管理者又は河川管理者により魚道が設けられている。 In Japan, there are many migratory fish that run up and down rivers such as ayu and salmon. River crossing structures (weirs) intended for irrigation water hinder this, and in recent years fish facilities have been established by facility managers or river managers.
しかし、魚道頂部には取水の便宜をはかる目的の垂直の利水板が設置されている場合が多く、魚類の遡上を著しく妨げている(図5、図6)。これは、整備された魚道を魚類が遡上したとしても、頂部にある垂直の利水板が壁になってしまうためである。 However, there are many cases where a vertical water supply plate for the purpose of taking water is installed at the top of the fishway, which significantly hinders the fish from going up (FIGS. 5 and 6). This is because even if the fish goes up the maintained fishway, the vertical water supply plate at the top becomes a wall.
また、魚類の遡上を良くするために垂直の利水板や横断工作物(堰)に手を加えることは、利水者(横断工作物(堰)の管理者)の理解を得ることも簡単ではない。 In addition, it is not easy to get the understanding of the water users (the manager of the crossing work (weir)) by manipulating the vertical irrigation board and the crossing work (weir) to improve the fish run-up. Absent.
堰などの改良工事を伴う大掛かりな魚道と異なる簡易な魚道装置が注目されている。一例として、サイフォン式パイプ魚道(特許文献1)が発明されており、堰に本装置を立て掛けるだけで機能する取り外しが容易にできるものである。また、各地域の河川管理者に問い合わせ確認したところ、魚道最上端の利水版による遡上障害を解決した構造物及び装置は現在のところ見受けられないと報告されている。
そこで本考案では、垂直の利水板の下流側に傾斜版を横断工作物に影響が少ない方法で設置する(状況に応じプールも設置可能)ことで、垂直の壁を無くし、魚類の遡上を円滑にするものである(図7,図8)。これにより利水と環境保全(魚類等の生息)の両立を図る。A simple fishway device that is different from a large-scale fishway with improvement work such as a weir is drawing attention. As an example, a siphon-type pipe fishway (Patent Document 1) has been invented, and it can be easily removed only by leaning this device against a weir. In addition, according to inquiries with river managers in each region, it has been reported that there are currently no structures and devices that have solved the problem of run-up due to the water supply plate at the top of the fishway.
Therefore, in the present invention, an inclined plate is installed on the downstream side of the vertical water supply plate in a way that has little effect on the crossing workpiece (a pool can be installed depending on the situation), so that the vertical wall can be eliminated and fish can be moved up. It is to make it smooth (FIGS. 7 and 8). In this way, both water utilization and environmental conservation (habitation of fish, etc.) will be achieved.
農業等の利水及び魚類の遡上を同時に実現すること、利水者(横断工作物(堰)の管理者)の理解が得やすくすることを考慮し、ボルトのみの固定とし、利水板から脱着可能となる魚道利水板付属傾斜装置を考案した。
これにより、設置した傾斜装置を容易に取り外す事が出来、また、河川構造物(堰)にもボルト式アンカー(セットアンカー)を埋め込む(ボルト用の小さな穴を削孔し、ボルト式アンカーを接着剤等で固定)だけで、利水板に手を加えることもなく、横断工作物の構造物自体への影響(構造的・強度的)は極めて小さくなる。
また、素材はステンレス(一部木材)を使用することで軽量な装置となり、運搬及び設置が容易であるとともに素材の長寿命化を図る。In consideration of realizing water utilization such as agriculture and fish run-up at the same time and making it easier for water users (managers of crossing works (weirs)) to understand, fixing only bolts and detaching from water utilization plates We have devised a tilting device attached to the fishway water plate.
As a result, the installed tilting device can be easily removed, and bolt type anchors (set anchors) are embedded in river structures (weirs) (small holes for bolts are drilled and bolt type anchors are bonded) Only by fixing with the agent etc.), the influence on the structure itself of the crossing workpiece (structural and strength) becomes extremely small without any changes to the water utilization plate.
In addition, the material is a lightweight device by using stainless steel (partially wood), and it is easy to transport and install and to extend the life of the material.
請求項1〜7までの魚道利水板付属傾斜装置は堰を全く改変することなく、堰の下流側に設置をするだけでよいため、灌漑用水の取水に影響を与えずに、魚類遡上率を高めることができる。 Since the fishway diversion board-attached tilting device according to claims 1 to 7 need only be installed downstream of the weir without altering the weir at all, it does not affect the intake of irrigation water, and the fish run-up rate Can be increased.
請求項4の魚道利水板付属傾斜装置は、凹凸面が実際の河床のように摩擦を発生させるため、魚類や甲殻類などの水生生物が滑落することなく、傾斜を上ることができる。 In the tilting device attached to the fishway irrigation board according to the fourth aspect, the uneven surface generates friction like an actual riverbed, so that aquatic organisms such as fish and crustaceans can climb up the slope without sliding down.
請求項4の魚道利水板付属傾斜装置は、凹凸面を流れる水が不規則に流れ落ちることで傾斜装置の下流面に気泡を発生させ、波立ちのあるところに集まる習性を利用し、呼び水効果を発揮し、魚類が堰付近に到達した際に迷うことなく魚道装置付近に集まることが可能となる。 The tilting device with a fishway diversion plate according to claim 4 exhibits a priming effect by utilizing the habit of gathering where there is a wave by generating bubbles on the downstream surface of the tilting device by irregularly flowing down the water flowing on the uneven surface. However, when the fish reaches the vicinity of the weir, it is possible to gather in the vicinity of the fishway device without hesitation.
請求項5の魚道利水板付属傾斜装置は傾斜板上面にフランジを設置することで流水の流向を拡散せずなおかつ流速を増幅させるため、下流部に大きな波立ちを起こすことができ、呼び水効果を発揮し、魚類が堰付近に到達した際に迷うことなく魚道装置付近に集まることが可能となる。 The inclination device attached to the fishway diversion plate according to claim 5 does not diffuse the flow direction of the flowing water by a flange installed on the upper surface of the inclined plate and further amplifies the flow velocity, so that a large ripple can be caused in the downstream portion, and the priming effect is exhibited. However, when the fish reaches the vicinity of the weir, it is possible to gather in the vicinity of the fishway device without hesitation.
請求項6の魚道利水板付属傾斜装置は傾斜板と利水板の間にプールを設けることで、小型の魚類などが休息しながら堰を越えることができ、遡上円滑化を図ることができる。 The fishway irrigation board-attached tilting apparatus according to claim 6 is provided with a pool between the tilting board and the irrigation board, so that small fish and the like can rest over the weir while resting, and smooth running up can be achieved.
図1に示すような本考案の効果を確認するために魚道利水板付属傾斜装置を以下のように作製した。 In order to confirm the effect of the present invention as shown in FIG.
符号3の斜辺60cm、符号4の底辺50cm、符号7の対辺40cm、傾斜角30度の魚道利水板付属傾斜装置を用意した。 A fishway irrigation board-attached tilting device having an oblique side of 60 cm, a base of 50 cm, a base of 50 cm, an opposite side of 40 cm, and an inclination angle of 30 degrees was prepared.
実証実験は共同考案者の居住地に近い彼杵川(長崎県東彼杵郡東彼杵町)において考案関係者のみで行った。 The demonstration experiment was carried out only by those involved in the design in the Hiyodogawa (Higashisonogi-cho, Higashisonogi-gun, Nagasaki Prefecture) near the place of residence of the co-inventor.
実証実験は第1回目を平成26年11月4日 13:00〜15:00、第2回目を平成27年4月15日 13:00〜15:00、第3回目を平成27年5月30日 14:00〜16:00に行った。 The first demonstration was November 4, 2014, 13: 00 to 15:00, the second was April 15, 2015, 13: 00 to 15:00, and the third was May 2015. It went from 14:00 to 16:00 on the 30th.
第1回目は河川に直接魚道利水板付属傾斜装置を設置し、傾斜面の水の流れ方を確認した(図6)。 In the first round, we installed an inclining device attached to the fishway irrigation board directly in the river, and confirmed how water flows on the inclined surface (Fig. 6).
実験の結果、水は傾斜面の側面から漏れ落ちることなく、側面のフランジに沿って、魚類を傾斜面に呼び込むのに必要な水量が流下した。 As a result of the experiment, water did not leak from the side surface of the inclined surface, and the amount of water required to bring fish into the inclined surface flowed along the flange on the side surface.
第2回目は魚道利水板付属傾斜装置の使用時に遡上してくる大きさの稚アユ50匹を用いて行った。 The second round was conducted using 50 juvenile sweetfish that were sized to run up when using the tilting device attached to the fishway.
限られた数量の稚アユで実験するため、直接河川に放流せずに2m×1m×1mの長方形の容器の中に実際の河川と同じように堰部分と魚道部分の落差を設けてその落差部分に魚道利水板付属傾斜装置を設置して魚の遡上状況を確認した。 In order to experiment with a limited number of juvenile sweetfish, a head of a weir part and a fishway part is provided in a rectangular container of 2m x 1m x 1m in a rectangular container of 2m x 1m x 1m without being discharged directly into the river. A fishway diversion board attached tilting device was installed in the area, and the situation of the fish going up was confirmed.
実験の結果、魚道利水板付属傾斜装置が無い場合は落差によって遡上ができないことを確認した。 As a result of the experiment, it was confirmed that if there is no fishway diversion board attached tilting device, it is not possible to go up by a head.
魚道利水板付属傾斜装置を設置した場合は傾斜面をアユが遡上することを確認できた。 It was confirmed that Ayu goes up the inclined surface when the tilting device attached to the fishway irrigation board is installed.
第3回目も同様の条件で実証実験を行った。この際、アユ以外に彼杵川に棲息している魚類も対象魚として用いた。 The third experiment was conducted under the same conditions. At this time, other than Ayu, fish living in the Hikawa River were also used as target fish.
実験の結果、アユ以外にもオイカワも魚道利水板付属傾斜装置を利用して遡上することを確認した(図8)。 As a result of the experiment, it was confirmed that Oikawa ascends by using a tilting device attached to a fishway irrigation board in addition to Ayu (Fig. 8).
農業用水を取水する堰に設置されている魚道頂部に存在する垂直の利水板の直下部に、本考案である魚道利水板付属傾斜装置を設置して、アユ等の魚類の遡上を助けるようにした。
こういった河川において遡上率を高める役を果たすとともに利水者(横断工作物(堰)管理者)の理解も得やすい構造であり、全国各地の河川において導入が可能である。In order to help the fish, such as sweetfish, run up by installing the fishway diversion board attached tilting device, which is the present invention, just below the vertical water diversion plate located at the top of the fishway that is installed in the weir for taking agricultural water I made it.
In such a river, it has the role of increasing the run-up rate and is easily understood by water users (crossing work (weir) managers), and can be installed in rivers throughout the country.
下記に本考案の実施の一つの形態を説明するが、本考案の請求の範囲はこれらによって何等限定されるものではない。
図1は本実施の形態に係る装置を表す図であり、斜視したものである。図2は本装置の上方向からみた図である。図3は本装置を側面方向からみた図である。図4は本装置を正面からみた図である。One embodiment of the present invention will be described below, but the scope of claims of the present invention is not limited by these.
FIG. 1 is a perspective view showing a device according to the present embodiment. FIG. 2 is a top view of the apparatus. FIG. 3 is a side view of the apparatus. FIG. 4 is a front view of the apparatus.
図1〜図4に示す通り本装置は垂直な利水板に対し、魚が緩傾斜で上れるよう河床勾配と同様の角度をつけたものである。 As shown in FIG. 1 to FIG. 4, this apparatus has an angle similar to that of the riverbed gradient so that the fish can rise slowly with respect to the vertical water utilization plate.
図1〜図4において本装置は符号1〜7の支持部材から構成されている。 1-4, this apparatus is comprised from the supporting member of the codes | symbols 1-7.
本装置は符号1、3、4、7の板を用い、直角三角形状に構成する。 This device uses plates 1, 3, 4, and 7 and is configured in a right triangle shape.
本装置は符号7a〜7cに示される四角形状のプール(貯水槽)を設けて符号1、3、4、7の板を用い用いた構成にすることもできる。 This apparatus can also be configured to have a rectangular pool (reservoir) indicated by reference numerals 7a to 7c and use plates of reference numerals 1, 3, 4, and 7.
直角三角形の形状の本装置は符号3で示す傾斜板、符号4で示す底面板、符号7a〜7bで構成された貯水部などで構成される。 This right triangle-shaped device is composed of an inclined plate indicated by reference numeral 3, a bottom plate indicated by reference numeral 4, a water storage section constituted by reference numerals 7a to 7b, and the like.
本装置の斜面を構成する傾斜板の両側には符号2のフランジを設置する。 The flange of the code | symbol 2 is installed in the both sides of the inclination board which comprises the slope of this apparatus.
符号1、2、3、7の支持部材の素材は本実施例では木材の場合を示したがより薄いステンレス材を用いることもでき、またはプラスチック材を用いて一体に構成することもできる。 In the present embodiment, the material of the support members 1, 2, 3, and 7 is wood, but a thinner stainless steel material can be used, or a plastic material can be integrally formed.
本装置の符号1〜7の支持部材の大きさは設置する河川、堰の規模によって適宜変えることができる。 The size of the support members denoted by reference numerals 1 to 7 of the present apparatus can be appropriately changed depending on the river to be installed and the scale of the weir.
本装置の符号3、4の底面板と傾斜板のなす角は河川の堰の高さ、河床勾配に合わせ適当に設定する。 The angle formed by the bottom plate and the inclined plate of reference numbers 3 and 4 of this device is set appropriately according to the height of the river weir and the riverbed slope.
本装置の符号3の斜面に別途、板の装着または傾斜部に溝を掘ることで凹凸面3aを設けることができる。 The uneven surface 3a can be provided separately on the slope of reference numeral 3 of this apparatus by mounting a plate or digging a groove in the inclined portion.
本装置の固定方法は利水板に上流部1を直接取り付けて固定する固定手段を設けた利水板固定型と底面板を河床と固定する河床固定型がある。 The fixing method of this apparatus includes a water supply plate fixing type provided with fixing means for directly attaching and fixing the upstream portion 1 to the water use plate and a river bed fixing type for fixing the bottom plate to the river bed.
利水板固定型の固定方法は符号1の上流部材を固定堰の利水板はめ込み部分に直接はめ込むことによって行う。 The water supply plate fixing type fixing method is carried out by directly fitting the upstream member of reference numeral 1 into the water supply plate fitting portion of the fixed weir.
利水板固定型の固定方法は利水板はめこみ部分に直接はめ込む固定方法に限られず各種固定手段を採用することができる。 The fixing method of the irrigation plate fixing type is not limited to the fixing method in which the irrigation plate is directly fitted into the portion where the irrigation plate is fitted, and various fixing means can be employed.
底部に固定のための孔を設け、符号5、6のナットとボルト式アンカーを用いて符号4の底面板を河床に固定する。 A hole for fixing is provided at the bottom, and a bottom plate of 4 is fixed to the river bed using nuts of 5 and 6 and bolt type anchors.
河床固定型の固定方法は符号5、6のナットとボルトに限られず各種固定手段を適宜採用することができる。 The fixing method of the river bed fixing type is not limited to the nuts and bolts denoted by reference numerals 5 and 6, and various fixing means can be appropriately employed.
固定した本装置は利水板による遡上の阻害の無い時期は不要のため取り外しができる着脱可能型とする。 This fixed device is a removable type that can be removed because it is not necessary when there is no hindrance from going up by the water supply plate.
日本には河川から農業用水を取水する堰が無数に存在している。その多くに魚道が設置されており、魚道の存在しなかった堰にも順次設置されつつあるが、それらの全部とは言えないが多くに垂直の利水板が見られる。これらの魚道はアユ等の魚類の遡上を目的としているにも関わらず、魚道頂部に設置された垂直の利水板のために遡上率が低下している。
本考案である魚道利水板付属傾斜装置はこういった河川において遡上率を高める役を果たすとともに利水者(横断工作物(堰)管理者)の理解も得やすい構造であり、全国各地の河川において導入が可能である。There are countless weirs in Japan that take agricultural water from rivers. Many of them are equipped with fishways and are gradually being installed in the weirs where there were no fishways. However, not all of them can be seen, but there are many vertical irrigation boards. Although these fishways are intended to run up fish such as sweetfish, the rate of going up has been lowered due to the vertical water irrigation board installed at the top of the fishway.
The incline device attached to the fishway irrigation board, which is the present invention, serves to increase the run-up rate in such rivers and is easy to understand for water users (crossing work (weir) managers). Can be introduced.
またコスト面でみると、一般的に堰の改良と一体で行われる魚道の設置及び改良工事は1千万円以上の費用を必要とするため、全ての堰に魚道の整備が追い付いていない。しかし、本考案である魚道利水板付属傾斜装置は改良工事を伴わない物品であるため、購入して設置するだけである上、魚道工事の千分の1程度の費用で済むため、課題を抱える多くの河川において広く普及すると考えられる。 In terms of cost, the installation and improvement of the fishway, which is generally carried out together with the improvement of the weir, requires more than 10 million yen, so the maintenance of the fishway has not caught up with all the weirs. However, the tilting device attached to the fishway irrigation board, which is the present invention, is an article that does not involve any improvement work. Widely used in many rivers.
1:上流部
2:フランジ部(2a:左側フランジ、2b:右側フランジ)
3:傾斜板(3a:凹凸面)
4:底面板
5:ナット(魚道と下板を固定する)
6:ボルト式アンカー
7:プール部1: Upstream part 2: Flange part (2a: left side flange, 2b: right side flange)
3: Inclined plate (3a: uneven surface)
4: Bottom plate 5: Nut (fixes fishway and lower plate)
6: Bolt type anchor 7: Pool part
またコスト面でみると、一般的に堰の改良と一体で行われる魚道の設置及び改良工事は1千万円以上の費用を必要とするため、全ての堰に魚道の整備が追い付いていない。しかし、本考案である魚道利水板付属傾斜装置は改良工事を伴わない物品であるため、購入して設置するだけである上、魚道工事の百分の1程度の費用で済むため、課題を抱える多くの河川において広く普及すると考えられる。 In terms of cost, the installation and improvement of the fishway, which is generally carried out together with the improvement of the weir, requires more than 10 million yen, so the maintenance of the fishway has not caught up with all the weirs. However, the tilting device attached to the fishway irrigation board, which is the present invention, is an article that does not involve improvement work. Widely used in many rivers.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015003328U JP3200421U (en) | 2015-06-15 | 2015-06-15 | Fish run-up smoothing tilting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015003328U JP3200421U (en) | 2015-06-15 | 2015-06-15 | Fish run-up smoothing tilting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JP3200421U true JP3200421U (en) | 2015-10-22 |
Family
ID=54477456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2015003328U Expired - Fee Related JP3200421U (en) | 2015-06-15 | 2015-06-15 | Fish run-up smoothing tilting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3200421U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109469030A (en) * | 2018-12-21 | 2019-03-15 | 中国电建集团贵阳勘测设计研究院有限公司 | A collection fortune fish system for diversion formula power generation high dam |
KR20200094574A (en) * | 2019-01-30 | 2020-08-07 | 전남대학교산학협력단 | Integrated Eco-bridge System of benthic fishes and benthos including eels |
CN114411651A (en) * | 2022-03-07 | 2022-04-29 | 安徽理工大学 | Step-by-step paired up-and-down reciprocating combined fishway and fish passing method |
-
2015
- 2015-06-15 JP JP2015003328U patent/JP3200421U/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109469030A (en) * | 2018-12-21 | 2019-03-15 | 中国电建集团贵阳勘测设计研究院有限公司 | A collection fortune fish system for diversion formula power generation high dam |
CN109469030B (en) * | 2018-12-21 | 2024-03-19 | 中国电建集团贵阳勘测设计研究院有限公司 | Fish gathering and transporting system for diversion type power generation high dam |
KR20200094574A (en) * | 2019-01-30 | 2020-08-07 | 전남대학교산학협력단 | Integrated Eco-bridge System of benthic fishes and benthos including eels |
CN114411651A (en) * | 2022-03-07 | 2022-04-29 | 安徽理工大学 | Step-by-step paired up-and-down reciprocating combined fishway and fish passing method |
CN114411651B (en) * | 2022-03-07 | 2024-03-22 | 安徽理工大学 | Step-by-step paired up-down reciprocating combined fishway and fish passing method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3200421U (en) | Fish run-up smoothing tilting device | |
KR101941918B1 (en) | Underwater facilities for seaweed forest | |
CN210764534U (en) | Pollute river course water normal position and administer biological bars | |
KR101169558B1 (en) | Apparatus for suppressing algal growth | |
CN205707195U (en) | A kind of floating offshore platform | |
US20170036124A1 (en) | Floating sheet wave water attraction | |
JP4652993B2 (en) | Water construction and its installation structure | |
JP2009072122A (en) | Tuna-culturing pond installed on ground | |
CN209787086U (en) | photovoltaic support for water surface floating pipe | |
CN210480996U (en) | Submerged aeration device | |
CN204138428U (en) | A kind of biological floating bed wave that disappears helps floating device | |
JP2007270591A (en) | Rubble structure formed in fish way | |
Gibbs et al. | Physical processes for in-lake restoration: Destratification and mixing | |
JP2009045009A (en) | Rehabilitation apparatus for pet | |
RU182866U1 (en) | CIRCLE ROUND PONTON | |
CN107938592A (en) | A kind of ecological reconstruction structure of linear pattern city river | |
KR200460631Y1 (en) | Apparatus for suppressing algal growth | |
CN204093320U (en) | The resistant to pollution flat membrane component of lower resistance short route | |
JP2016084576A (en) | Pollution diffusion preventive membrane | |
KR102296786B1 (en) | Unit for assembling with anchor pile and assembly having thereof | |
CN201349446Y (en) | Pool activity aerator | |
JP2020193460A (en) | Portable fish way unit | |
RU171567U1 (en) | FLOATING AQUACULTURE PLATFORM | |
CN221398844U (en) | Ecological bottom protection ballast structure | |
CN201756815U (en) | Swimming pool |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20150824 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 3200421 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
LAPS | Cancellation because of no payment of annual fees |