JPH01248496A - Fishes migration intercepting method - Google Patents
Fishes migration intercepting methodInfo
- Publication number
- JPH01248496A JPH01248496A JP63077631A JP7763188A JPH01248496A JP H01248496 A JPH01248496 A JP H01248496A JP 63077631 A JP63077631 A JP 63077631A JP 7763188 A JP7763188 A JP 7763188A JP H01248496 A JPH01248496 A JP H01248496A
- Authority
- JP
- Japan
- Prior art keywords
- fish
- fishes
- field strength
- electric screen
- prohibited area
- 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.)
- Granted
Links
- 241000251468 Actinopterygii Species 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims description 6
- 230000005012 migration Effects 0.000 title abstract 3
- 238000013508 migration Methods 0.000 title abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000005684 electric field Effects 0.000 claims abstract description 15
- 230000009182 swimming Effects 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 7
- 230000000638 stimulation Effects 0.000 abstract description 10
- 241000861914 Plecoglossus altivelis Species 0.000 description 12
- 230000002940 repellent Effects 0.000 description 4
- 239000005871 repellent Substances 0.000 description 4
- 238000003491 array Methods 0.000 description 3
- 241000861915 Plecoglossus Species 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 231100000518 lethal Toxicity 0.000 description 1
- 230000001665 lethal effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Farming Of Fish And Shellfish (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、水中における侵入禁止域への魚゛類の遊泳を
遮断する魚類の遊泳遮断方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for blocking fish from swimming in a prohibited area in water.
従来、水力発電所のように、ダムにより河川の流れをせ
き止め、取水口よりせき止めた水を取り込む水力発電所
において、取水口に魚類が侵入すると、取水ラインに詰
まりが生じて水力発電所の各部の異常を招き、水力発電
所設備の全機能を停止させるおそれがあシ、しかも設備
に侵入した魚類が排水により致死魚として放出されるこ
とから、あゆなどの川魚を対象とした漁業補償問題を招
来するため、このような水力設備の取水口への魚類の侵
入を防止する手法として、前記取水口の近傍に網を配設
し、当該網によシ侵入禁止域である取水口の近傍への魚
類の侵入を遮断することが一般的に行われている。Traditionally, in hydroelectric power plants where the flow of a river is blocked by a dam and the dammed water is taken in through the water intake, if fish invade the water intake, the water intake line becomes clogged, causing damage to various parts of the hydropower plant. There is a risk that this could lead to abnormalities in the hydroelectric power plant equipment, causing all functions to stop.Furthermore, fish that have invaded the equipment will be released as lethal fish through drainage, so there is a fisheries compensation issue for river fish such as sweetfish. In order to prevent fish from entering the water intakes of such hydropower facilities, a net is placed near the water intake, and the net is used to prevent fish from entering the water intake area, which is a prohibited area. It is common practice to prevent fish from entering the area.
しかし、この場合、使用する網として非常に目の細かい
ものが必要となシ、このように目の細い網を用いると、
魚類の侵入阻止効果は高い反面。However, in this case, it is necessary to use a very fine mesh, and when using such a fine mesh,
On the other hand, it is highly effective in preventing fish from entering.
ごみや枯葉等による目詰りが生じ易く、取水量の低下を
招くため、このような目詰りが生じた場合には、半自動
ごみ取り装置や人手によるごみ等の除去が行われておシ
、非常に手間がかがシ、網の保守１点検に多大な費用と
労力を要するという欠点がある。Clogging with debris and dead leaves is likely to occur, leading to a decrease in water intake, so if such clogging occurs, the debris must be removed by a semi-automatic garbage removal device or manually. The drawback is that it is time-consuming and requires a great deal of cost and effort for each maintenance inspection of the net.
そこで１本件出願人において、つぎのような遮断方法を
提案している。Therefore, one applicant has proposed the following blocking method.
すなわち、水中の侵入禁止域の近辺に複数の電極列を並
行に配設し、各電極列に電圧を印加して各電極列間に所
定電界強度の電気スクリーンを形成し、前記電気スクリ
ーンにより魚類の侵入禁止域への遊泳を遮断しようとす
るものである。That is, a plurality of electrode rows are arranged in parallel near a prohibited area underwater, and a voltage is applied to each electrode row to form an electric screen with a predetermined electric field strength between each electrode row. The aim is to prevent swimming in prohibited areas.
しかし、この場合、同じ電界強度でも、魚類の体長によ
って魚類の受ける電気的刺激が異なり、しかも前記した
水力発電所の取水口のように、所定の流速の水流がある
ところでは、この水流の流速によっても魚類の受ける電
気的刺激が異なるため、流速等に応じた条件設定が適当
でないと、電気的刺激が強すぎて魚類が死滅し、逆に電
気的刺激か弱すぎて魚類の遊泳を確実に遮断できな°い
ことになるという問題点がある。However, in this case, even if the electric field strength is the same, the electrical stimulation received by the fish differs depending on the length of the fish's body.Moreover, in places where there is water flow at a predetermined speed, such as at the water intake of the hydroelectric power plant mentioned above, the flow rate of this water flow is The electrical stimulation that fish receive differs depending on the situation, so if the conditions are not set appropriately according to the flow velocity, etc., the electrical stimulation will be too strong and the fish will die, and conversely, the electrical stimulation will be too weak and the fish will not be able to swim properly. There is a problem in that it cannot be shut off.
そこで１本発明は前記の点に留意してなされ、侵入禁止
域Ｊ向への水流の流速がＯ１ｌ〜１ （ｍ／ｓｅｅ ：
）であるときに、遮断対象となる魚類の遊泳を確実に遮
断できるようにすることを目的とする。Therefore, the present invention has been made with the above-mentioned points in mind, and the flow rate of the water flow in the direction of the prohibited area J is O1l~1 (m/see:
), the purpose is to be able to reliably block the swimming of fish targeted for blocking.
つぎに、前記目的を達成するだめの手段を、実施例に対
応する第１図を用いて説明する。Next, means for achieving the above object will be explained using FIG. 1 which corresponds to an embodiment.
すなわち、水中に２個の電極列（Ｉａ）、（Ｉｂ）を並
行に配設し、前記画電極列（Ｉａ）、（ｌｂ）に電圧を
印加して前記画電極列（ｌａ）、（Ｉｂ）間に所定電界
強度の電気スクリーン（５）を形成し、前記電気スクリ
ーンにより魚類の侵入禁止域への遊泳を遮断する魚類の
遊泳遮断方法において、本発明は、前記侵入禁止域方向
への水流の流速が０．１〜１（ｍ／Ｓｅｃ、ｌであると
きに、前記電気スクリーン（５）の電界強度と、遮断対
象である魚類の体長との積が、１以上で２．５以下とな
るようにすることを特徴とするものでおる。That is, two electrode rows (Ia) and (Ib) are arranged in parallel in water, and a voltage is applied to the picture electrode rows (Ia) and (lb) to create the picture electrode rows (la) and (Ib). ), in which an electric screen (5) with a predetermined electric field strength is formed between them, and the electric screen blocks swimming of fish into a prohibited area, the present invention provides a method for blocking water flow in the direction of the prohibited area. When the flow velocity is 0.1 to 1 (m/Sec, l), the product of the electric field strength of the electric screen (5) and the body length of the fish to be blocked is 1 or more and 2.5 or less. It is characterized by making it happen.
したがって、本発明によると、画電極列（ｌａ）。 According to the invention, therefore, the picture electrode array (la).
（１ｂ）間の電気スクリーン（５）の電界強度を決定す
るパフメータとして、電界強度（Ｖ／ｚ ）と、遮断対
象である魚類の体長〔画〕との積が導入され、侵入禁止
域方向への水流の流速が０．１〜ｌ（ｍ／ｓｅｅ：）
であるときに、前記した積が１以上で２．５以下とな
る電気スクリーン（５）が形成され、あゆなどの魚類に
対し、忌避行動をとシ得る程度の電気的刺激を与えるこ
とが可能となり、魚類の遊泳が確実に遮断され、侵入禁
止域へのあゆなどの魚類の侵入が防止される。As a puff meter to determine the electric field strength of the electric screen (5) between (1b), the product of the electric field strength (V/z) and the body length (picture) of the fish to be blocked is introduced. The flow rate of the water flow is 0.1 to 1 (m/see:)
When the above-mentioned product is 1 or more and 2.5 or less, an electric screen (5) is formed, and it is possible to provide electrical stimulation to fish such as sweetfish to the extent that they can prevent repellent behavior. As a result, swimming of fish is reliably blocked, and fish such as sweetfish are prevented from entering the prohibited area.
つぎに、この発明を、そのｌ実施例を示した図面ととも
に詳細に説明する。Next, the present invention will be explained in detail with reference to drawings showing embodiments thereof.
第１図において、（ｌａ）、（ｌｂ）は侵入禁止域であ
る水力発電所の取水口付近の水中に並行に配設された２
個の電極列であり、それぞれ複数個の棒状導電電極（２
ａ）、（２ｂ）が等間隔に配列されて形成され１両電極
列（ｌａ）、（Ｉｂ）ごとの各導電型ｍ（２ａ）。In Figure 1, (la) and (lb) are two lines placed in parallel underwater near the water intake of a hydroelectric power plant, which is a prohibited area.
electrode rows, each of which has a plurality of rod-shaped conductive electrodes (2
a) and (2b) are arranged at equal intervals, and each conductivity type m (2a) is formed for each electrode row (la) and (Ib).
（２ｂ）が接続体（３ａ） 、 （３ｂ）により電気的
に接続されている。(2b) is electrically connected by connecting bodies (3a) and (3b).
（４）は電気スクリーン発生用の電源であり、該電源（
４）により画電極列（ｔａ）、Ｎｂ）間にたとえば直流
電圧が印加され、画電極列（Ｉａ）、（ｌｂ）間に所定
で；異強度の電気スクリーン（５）が形成される。(4) is a power source for generating an electric screen, and the power source (
4), for example, a DC voltage is applied between the picture electrode arrays (ta) and Nb), and an electric screen (5) of different intensities is formed between the picture electrode arrays (Ia) and (lb).
このとき、水力発電所の取水口における水流は、第２図
中の矢印に示すように、取フに口の内側である侵入禁止
方向に向っており、流速は０．１〜１ （：ｍ／５ｅＣ
）である。At this time, the water flow at the water intake of the hydroelectric power plant is directed toward the inside of the intake, which is prohibited from entering, as shown by the arrow in Figure 2, and the flow velocity is 0.1 to 1 (: m /5eC
).
ところで、このように水流の流速が０．１〜ｌ（ｍ／５
ｅｃ）であるときに、遮断対象魚としてあゆを選び、画
電極列（ｌａ）、（ｌｂ）間の電気スクリーン（５）の
電界強度をどれくらいに設定すればよいかを決定するだ
めに、電気スクリーン（５）の電界強度Ｅ（Ｖ／ｃ、ｌ
と。By the way, as shown above, the flow rate of the water flow is 0.1 to 1 (m/5
ec), select sweetfish as the fish to be cut off, and decide how much electric field strength to set on the electric screen (5) between the picture electrode arrays (la) and (lb). Electric field strength E (V/c, l
and.
あゆの体長Ｌ （３）との積Ｅ−Ｌをパラメータとし、
この積Ｅ−Ｌを変化させたときのあゆの反応を実験的に
調べたところ、積Ｅ−Ｌが１〔ｖ〕未満では、あゆは電
気スクリーン（５）に反応せずに正の定流性を示し、積
Ｅ−Ｌが２．５（Ｖ）よシ大きいときには、あゆは強い
電気的刺激により遊泳能力を失い、積Ｅ−Ｌが１〔７３
以上で２．５ （Ｖ ）以下では、あゆは忌避行動をと
って上流側に戻ることがわかった。The product E-L of sweetfish body length L (3) is taken as a parameter,
When we experimentally investigated the reaction of the sweetfish when this product E-L was changed, we found that when the product E-L was less than 1 [v], the sweetfish did not react to the electric screen (5) and had a positive constant flow. When the product E-L is larger than 2.5 (V), Ayu loses swimming ability due to strong electrical stimulation, and the product E-L becomes 1 [73
The above results show that below 2.5 (V), sweetfish take repellent behavior and return to the upstream side.
したがって、電気スクリーン（５）の電界強度Ｅと体長
りとの積Ｅ −ＬカＩ （Ｖ）以上で２．５ＣＶ）以下
となるような電気スクリーン（５）を水中に形成するこ
とにより、あゆの魚体を損傷することなく、あゆの遊泳
を確実に遮断することができる。Therefore, by forming an electric screen (5) in water such that the product of the electric field strength E of the electric screen (5) and the body length is E - L kI (V) or more and 2.5CV or less, the It is possible to reliably block the swimming of sweetfish without damaging the body of the fish.
このように、前記実施例によると、侵入禁止域方向への
水流の流速が０．Ｉ〜ｌ（ｍ／５ｅｃ）であるときに。As described above, according to the embodiment, the flow velocity of the water flow in the direction of the prohibited area is 0. When I~l (m/5ec).
電気スクリーン（５）の電界強度と遮断対象魚であるあ
ゆの体長との積が、’＋（Ｖ）以上で２．５（Ｖ）以下
となるような電気スクリーン（５）を形成したため、あ
ゆに対し、魚体を損傷することなく、忌避行動をとり得
る程度の電気的刺激を与えることが可能となり、あゆの
遊泳を確実に遮断することができ、侵入禁止域である水
力発電所の取水口の内側へのあゆの侵入を防止すること
ができる。Since the electric screen (5) was formed such that the product of the electric field strength of the electric screen (5) and the body length of the fish to be cut off, the sweetfish, was greater than + (V) and less than 2.5 (V), It is now possible to apply electrical stimulation to the extent that the fish can take repellent behavior without damaging the fish body, and it is possible to reliably block the swimming of the sweetfish, allowing it to be used at the water intake of a hydroelectric power plant, which is a prohibited area. It is possible to prevent sweetfish from entering the inside of the container.
なお、電極列は３列以上であってもよいのは勿論である
。Note that, of course, the number of electrode rows may be three or more rows.
本発明は１以上説明したように構成されているので、以
下に記載する効果を奏する。Since the present invention is constructed as described in one or more of the above descriptions, it achieves the advantages described below.
侵入禁止域方向への水流の流速が０．１〜ｍ（ｍ／ｓｅ
ｃ：］であるときに、電気スクリーンの電界強度と遮断
対象魚の体長との積が、１以上で２．５以下となるよう
な電気スクリーンが形成されるため、あゆなどの魚類に
対し、魚体に損傷を与えることなく。The velocity of water flow in the direction of the prohibited area is 0.1 to m (m/sec).
c:], an electric screen is formed in which the product of the electric field strength of the electric screen and the body length of the target fish is 1 or more and 2.5 or less. without causing any damage.
忌避行動をとり得る程度の電気的刺激を与えることが可
能となシ、魚類の遊泳を確実に遮断することができ、侵
入禁止域への魚類の侵入を防止でき、水力発電所の取水
口等における魚類の遊泳遮断に揃めて有効である。It is possible to provide electrical stimulation to the extent that they can take repellent behavior, it can reliably block fish from swimming, it can prevent fish from entering prohibited areas, and it can be used at water intakes of hydroelectric power plants, etc. It is also effective in blocking the swimming of fish.
図面は１本発明の魚類の遊泳遮断方法の１実施例を示し
、第１図は斜視図、第２図は模式図である。
（ｌａ）、（ｌｂ）・・・電極列、（５）・・・電気ス
クリーン。The drawings show an embodiment of the method for blocking the swimming of fish according to the present invention, and FIG. 1 is a perspective view, and FIG. 2 is a schematic diagram. (la), (lb)...electrode array, (5)...electric screen.
Claims (1)
列に電圧を印加して前記各電極列間に所定電界強度の電
気スクリーンを形成し、前記電気スクリーンにより魚類
の侵入禁止域への遊泳を遮断する魚類の遊泳遮断方法に
おいて、 前記侵入禁止域方向への水流の流速が０．１〜１〔ｍ／
ｓｅｃ〕であるときに、前記電気スクリーンの電界強度
と、遮断対象である魚類の体長との積が、１以上で２．
５以下となるようにすることを特徴とする魚類の遊泳遮
断方法。(1) A plurality of electrode rows are arranged in parallel underwater, and a voltage is applied to each of the electrode rows to form an electric screen with a predetermined electric field strength between the electrode rows, and the electric screen prevents fish from entering. In the method of blocking fish from swimming in the area, the velocity of the water flow in the direction of the prohibited area is 0.1 to 1 m/m/
sec], the product of the electric field strength of the electric screen and the body length of the fish to be blocked is 1 or more and 2.
5 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63077631A JPH01248496A (en) | 1988-03-29 | 1988-03-29 | Fishes migration intercepting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63077631A JPH01248496A (en) | 1988-03-29 | 1988-03-29 | Fishes migration intercepting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01248496A true JPH01248496A (en) | 1989-10-04 |
| JPH0578290B2 JPH0578290B2 (en) | 1993-10-28 |
Family
ID=13639248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63077631A Granted JPH01248496A (en) | 1988-03-29 | 1988-03-29 | Fishes migration intercepting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01248496A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102630619A (en) * | 2012-04-27 | 2012-08-15 | 三峡大学 | Viscous fish egg killing device |
| CN109691423A (en) * | 2018-12-13 | 2019-04-30 | 上海海洋大学 | A kind of capturing device and capturing method for mass migration fish in fresh water |
| WO2021170753A1 (en) * | 2020-02-28 | 2021-09-02 | Hyfish Gmbh | Hybrid fish protection on intake screens |
-
1988
- 1988-03-29 JP JP63077631A patent/JPH01248496A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102630619A (en) * | 2012-04-27 | 2012-08-15 | 三峡大学 | Viscous fish egg killing device |
| WO2013159603A1 (en) * | 2012-04-27 | 2013-10-31 | 三峡大学 | Viscous fish egg killing device |
| CN109691423A (en) * | 2018-12-13 | 2019-04-30 | 上海海洋大学 | A kind of capturing device and capturing method for mass migration fish in fresh water |
| WO2021170753A1 (en) * | 2020-02-28 | 2021-09-02 | Hyfish Gmbh | Hybrid fish protection on intake screens |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0578290B2 (en) | 1993-10-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |