US20100086357A1 - Fish passes - Google Patents
Fish passes Download PDFInfo
- Publication number
- US20100086357A1 US20100086357A1 US12/387,841 US38784109A US2010086357A1 US 20100086357 A1 US20100086357 A1 US 20100086357A1 US 38784109 A US38784109 A US 38784109A US 2010086357 A1 US2010086357 A1 US 2010086357A1
- Authority
- US
- United States
- Prior art keywords
- channel component
- fish pass
- water
- pass
- penning
- 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.)
- Abandoned
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 241000251468 Actinopterygii Species 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000003416 augmentation Effects 0.000 description 9
- 241000252073 Anguilliformes Species 0.000 description 8
- 241000205572 Jeffersonia diphylla Species 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000005667 attractant Substances 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000031902 chemoattractant activity Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/08—Fish passes or other means providing for migration of fish; Passages for rafts or boats
- E02B8/085—Devices allowing fish migration, e.g. fish traps
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/08—Fish passes or other means providing for migration of fish; Passages for rafts or boats
-
- 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
- Y02A40/60—Ecological corridors or buffer zones
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Farming Of Fish And Shellfish (AREA)
- Artificial Fish Reefs (AREA)
Abstract
A fish pass comprises material (1) that augments a significant part of the crest of a water penning control structure (11) and a channel component (3) to convey water downstream of the water penning control structure (11), the channel component (3) having a hinged attachment to the crest of the water penning control structure (11).
Description
- This invention relates to fish passes, i.e. devices that allow upstream migration of fish over water level regulation devices such as tilting weirs, twin leaf gates and other water penning structures. The invention has been developed in relation to eel passes, but has application to fish passes generally.
- As part of their life cycle, eels migrate upstream in rivers, which are highly regulated resources with many control structures on them. These control structures pen back water at certain times of the year and allow flood water to dissipate at other times. Historically, these structures were of timber and/or were of such an age that their wetted surfaces were covered with moss and other natural materials in which the eels could get purchase and ascend such surfaces.
- There has, however, been a recent move to replace traditional penning devices with modern stainless steel and plastic structures. Examples of these are the tilting weir and the twin leaf gate. These latter kinds of structures prevent upstream migration of eels by virtue of their sheer, smooth sides and confusing overflow characteristics—eels navigate over more natural barriers by moving upstream against an attracting flow through a suitable substrate.
- Large scale eel passes use a pumped water flow as an attractant, but they are only viable on very large in-river barriers, are expensive to run and the pumps frequently clog.
- It is accordingly an object of the present invention to provide an improved form of fish pass.
- According to the present invention there is provided a fish pass which comprises material that augments a significant part of the crest of a water penning control structure and a channel component to convey water downstream of the water penning control structure, the channel component having a hinged attachment to the crest of the water penning control structure.
- A buoyancy unit is preferably attached adjustably to the channel component.
- The channel component is preferably lined with a bristle substrate, and the bristle substrate is preferably not parallel to the base of the channel component.
- The fish pass may also include an upstream element that is movable pivotally relative to the channel component, and a gearbox unit may be provided for effecting controlled movement of the upstream element relative to the channel component.
-
FIG. 1 is a perspective view of an eel pass in accordance with a first embodiment of the present invention, -
FIG. 2 is a side elevation of the eel pass ofFIG. 1 mounted on a tilting weir gate showing how the eel pass functions at two different water penning heights, -
FIG. 3 is a sectional view of the main channel of the eel pass ofFIG. 1 , showing different substrate arrangements and different channel widths, -
FIG. 4 is a sectional view of part of a tilting weir gate, showing typical attachment options for the weir crest augmentation material, -
FIG. 5 is a perspective view of an eel pass in accordance with a second embodiment of the present invention, -
FIG. 6 is a perspective view of a gearbox that forms part of the eel pass ofFIG. 5 , -
FIG. 7 is a perspective view of the gearbox ofFIG. 6 , but with the housing cover removed, and -
FIG. 8 is a reverse perspective view of the gearbox ofFIG. 6 , with the housing cover and the shaft-end housing removed. - The eel pass shown in
FIGS. 1 to 4 of the drawings comprises twostrips 1 of weir crest augmentation material that are attached bysuitable fixings tilting weir 11 or other appropriate water level control structure. Amain channel 3 is hingedly connected at 2 to the weir crest augmentation material, with the hinge being at substantially the same level as the top of thetilting weir 11. Thechannel 3 is thus arranged for pivotal movement relative to the non-augmented section of the weir crest. The inside of themain channel 3 is lined with anappropriate bristle substrate 7 and the ends of themain channel 3 are partially blanked off by means oftriangular end stops 6. Thebristle substrate 7 carries two densities of bristles to cater for different sizes of eels and thebristle substrate 7 is fixed in a sloping arrangement to allow for different water flow rates down thechannel 3. The bristles are thus inclined to the vertical so that, in cross-section, the upper surfaces of the bristles are either of V-shaped formation, or inverted V-shape, as shown inFIG. 3 . - The two
strips 1 of weir crest augmentation material, which may be of wood or a suitable plastics material, effectively serve to raise the height of the weir for substantially the whole width of the weir so that the majority of the water flowing over the weir passes down thechannel 3. - There is a planar lid or cover component 7A that is hingedly or otherwise attached to the main body of the
channel 3 and this protects the ascending eels from desiccation and predation. The lid or cover component 7A is removable to facilitate cleaning of the eel pass. - Adjacent the downstream end of the
channel 3 of the eel pass, there is anadjustable buoyancy unit 4 in the form of a hollow cylinder that is attached by means of anadjustment carriage 5 to guide slots in the sides of themain channel 3. The flotation effect of thebuoyancy unit 4 can be adjusted for varying conditions by moving thecarriage 5 along the guide slots. - The eel pass includes an
upstream element 10 that is hingedly connected at 9 to the weir crest augmentation material, with the hinge being at substantially the same level as the top of thetilting weir 11. Theupstream element 10 also has a covering of bristle substrate and the function of theupstream element 10 is to ensure that eels which have passed up themain channel 3 can get far enough away from the weir flow that they do not get swept back downstream. Theupstream element 10 may be fixed at a pre-set angle or may be adjustable by altering its weight or profile. - The
tilting weir 11 is arranged to pivot about apivot axis 12 andFIG. 2 shows how, with thetilting weir 11 arcing around thepivot point 12, the eel pass will still maintain a water flow down thechannel 3 which will remain at a suitable gradient. The line indicated at W3 inFIG. 2 represents the downstream water level while the lines W1 and W2 represent two different penned water levels. -
FIG. 4 illustrates two possible methods of attaching the weircrest augmentation material 1 and thehinges weir 11 or other water penning control structure.Fixing screws 8 can be driven through the weircrest augmentation material 1 into the body of the waterpenning control structure 11, or an appropriately dimensioned H-section extrusion 13 can be attached to thestructure 11, with the weircrest augmentation material 1 attached to the H-section extrusion 13. - An important advantage of the eel pass described above and shown in
FIGS. 1 to 4 is that it can easily be retro-fitted to existing structures in situ rather than replacing theentire tilting weir 11 or other water level control structure. The eel pass can also be factory fitted for a new installation. - Although specific reference has been made to the use of the device of the present invention to assist upstream movement of eels, the pass can be used to assist upstream movement of fish generally.
- The eel pass (or fish pass) shown in
FIGS. 5 to 8 differs from that shown inFIGS. 1 to 4 in that it includes a gearbox unit for effecting relative movements of the components of the eel pass. The purpose of the gearbox unit is to transmit the effects of a change in weir angle, registered by the downstream end of the eel pass, to the upstream component, thereby ensuring that this component is always angled downwards into the upstream water body. - This will allow eels or other fish to ascend the pass to its apex and enable them to crawl or swim beyond the influence of the weir crest flow.
- The whole gearbox unit can be raised or lowered according to water flow conditions and the position or influence of the weir crest augmentation material.
- As shown in
FIGS. 6 to 8 , the gearbox unit that comprises gears G1, seated in a gear housing G2 to which a gear housing cover G2 a is attached. The gearbox unit includes a downstream shaft G3, which is the attachment point for the downstream element of the eel pass. This shaft G3 transmits movement from a tilting weir in relation to thedownstream element 3 of the eel fish pass to the appropriate gear. Because the gears G1 are interlinked this movement is transferred to an upstream shaft G4. Theupstream element 10 of the eel pass is attached to this shaft G4 and deflects accordingly. The size and number of gears G1 can be calculated to provide an approximately constant downwards angle in the upstream element of the eel pass, regardless of the tilting angle of the weir. - Both shafts G3 and G4 are supported on the non-geared side by a shaft-end housing G5. The gears G1 in their housing G2, the shafts G3 and G4 and the shaft-end housing G5 can all be raised and lowered in relation to a weir fixing bracket G6 by the rotation of adjuster screws G7 and G8. Rotation of the screws G7 and G8 will allow either more or less water to flow down the eel pass. The adjuster screws G7 and G8 pass through captive threaded blocks G9 and G10 which are recessed into housings G2 and G5. The adjuster screws G7 and G8 terminate in the weir bracket G6 and the raising and lowering action is stabilized and supported by four guide pins G11, G12, G13 and G14. These guide pins are fixed into the weir bracket G6.
-
FIG. 5 shows the gearbox unit ofFIGS. 6 to 8 attached to and acting between a downstreammain channel component 3, to which abuoyancy unit 4 is adjustably attached, and anupstream channel component 10, with bristle assemblies contained within bothchannel components
Claims (10)
1. A fish pass which comprises material that augments a significant part of the crest of a water penning control structure and a channel component to convey water downstream of the water penning control structure, the channel component having a hinged attachment to the crest of the water penning control structure.
2. A fish pass as claimed in claim 1 , in which a buoyancy unit is attached to the channel component.
3. A fish pass as claimed in claim 2 , in which the buoyancy unit is attached adjustably to the channel component.
4. A fish pass as claimed in claim 1 , in which the channel component is lined with a bristle substrate.
5. A fish pass as claimed in claim 4 , in which the bristle substrate is not parallel to the base of the channel component.
6. A fish pass as claimed in claim 5 , which includes triangular end stops that partially blank off the upstream end of the channel component.
7. A fish pass as claimed in claim 1 , which includes an upstream element that is movable pivotally relative to the channel component.
8. A fish pass as claimed in claim 7 , which includes a gearbox unit for effecting controlled movement of the upstream element relative to the channel component.
9. A fish pass as claimed in claim 7 , in which the upstream element is of channel formation and contains a bristle substrate.
10. A fish pass as claimed in claim 1 , which includes a cover removably fitted to the channel component.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0808523.5A GB2460028B (en) | 2008-05-10 | 2008-05-10 | An eel pass |
GB0808523.5 | 2008-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100086357A1 true US20100086357A1 (en) | 2010-04-08 |
Family
ID=39571136
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/387,841 Abandoned US20100086357A1 (en) | 2008-05-10 | 2009-05-07 | Fish passes |
Country Status (3)
Country | Link |
---|---|
US (1) | US20100086357A1 (en) |
EP (1) | EP2116652A3 (en) |
GB (1) | GB2460028B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO337512B1 (en) * | 2014-01-21 | 2016-05-02 | Sea Soul As | Methods and facilities for catching fish |
JP2016211337A (en) * | 2015-05-13 | 2016-12-15 | 株式会社ダイクレ | Fishway installed on riverbed |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2470004A (en) * | 2009-05-05 | 2010-11-10 | Bruce Don | A gearbox unit for use with fish passes |
FR3003582B1 (en) * | 2013-03-21 | 2015-03-13 | Christian Jacquemin | FLOATING FISH PASS. |
CN107200195B (en) * | 2017-06-17 | 2019-05-24 | 江晓峰 | A kind of transfer mechanism for crossing over dam migration convenient for fish |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US46883A (en) * | 1865-03-21 | Improvement in flood-gates for mill-dams | ||
US1798238A (en) * | 1930-07-02 | 1931-03-31 | Bela T Wass | Fishway |
US4027487A (en) * | 1974-10-30 | 1977-06-07 | Societe Generale De Constructions Electriques Et Mecaniques (Alsthom) | Method for adjusting an automatic sluice with a view to ensuring a determined level |
US4437431A (en) * | 1981-11-06 | 1984-03-20 | Koch David L | Method and apparatus for diversion of downstream migrating anadromous fish |
US4629361A (en) * | 1983-12-07 | 1986-12-16 | Zimmerman Richard J | Integrated tubal by-pass fishway |
US4657434A (en) * | 1983-09-06 | 1987-04-14 | Woolnough Anthony L | River control structures |
US4929122A (en) * | 1987-02-11 | 1990-05-29 | Yoas Harold E | Fish protection system for dams |
US5139364A (en) * | 1989-11-06 | 1992-08-18 | Nagasaki-Ken | Automatic swing fishway apparatus |
US5160036A (en) * | 1991-10-15 | 1992-11-03 | Marathon Oil Company | Automatic pollution containment and alert apparatus for liquid drainages |
US20030219311A1 (en) * | 2002-03-15 | 2003-11-27 | Hildstad Tod A. | Bottom fed screened water diversion apparatus |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2653795B1 (en) * | 1989-10-31 | 1993-03-12 | Legault Antoine | ADJUSTABLE LEVELS FOR EELS. |
FR2666960B1 (en) * | 1990-09-21 | 1993-08-06 | Fish Pass Sarl | CAPTURE AND IRRIGATION KIT FOR EEL PASSES. |
GB2299920A (en) * | 1995-04-20 | 1996-10-23 | Water Power Dev Ltd | Floating fish pass |
JP3662051B2 (en) * | 1995-09-08 | 2005-06-22 | 伸二 永岡 | Undulating weir |
US6715959B2 (en) * | 2002-07-24 | 2004-04-06 | Bga Limited Partnership | Fish ladder for passing dams |
DE202004009528U1 (en) * | 2004-06-16 | 2004-08-26 | Schnitzer, Valentin, Dipl.-Ing. | Pass allows fish to ascend in flowing water courses in areas of build-up stages, water power installations and similar and comprises successively arranged basins in flow direction connected to each other by vertical slots |
NL1031738C1 (en) * | 2006-05-03 | 2007-11-06 | Tauw B V | Fish passage. |
-
2008
- 2008-05-10 GB GB0808523.5A patent/GB2460028B/en not_active Expired - Fee Related
-
2009
- 2009-05-07 US US12/387,841 patent/US20100086357A1/en not_active Abandoned
- 2009-05-08 EP EP09251281A patent/EP2116652A3/en not_active Withdrawn
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US46883A (en) * | 1865-03-21 | Improvement in flood-gates for mill-dams | ||
US1798238A (en) * | 1930-07-02 | 1931-03-31 | Bela T Wass | Fishway |
US4027487A (en) * | 1974-10-30 | 1977-06-07 | Societe Generale De Constructions Electriques Et Mecaniques (Alsthom) | Method for adjusting an automatic sluice with a view to ensuring a determined level |
US4437431A (en) * | 1981-11-06 | 1984-03-20 | Koch David L | Method and apparatus for diversion of downstream migrating anadromous fish |
US4657434A (en) * | 1983-09-06 | 1987-04-14 | Woolnough Anthony L | River control structures |
US4629361A (en) * | 1983-12-07 | 1986-12-16 | Zimmerman Richard J | Integrated tubal by-pass fishway |
US4929122A (en) * | 1987-02-11 | 1990-05-29 | Yoas Harold E | Fish protection system for dams |
US5139364A (en) * | 1989-11-06 | 1992-08-18 | Nagasaki-Ken | Automatic swing fishway apparatus |
US5160036A (en) * | 1991-10-15 | 1992-11-03 | Marathon Oil Company | Automatic pollution containment and alert apparatus for liquid drainages |
US20030219311A1 (en) * | 2002-03-15 | 2003-11-27 | Hildstad Tod A. | Bottom fed screened water diversion apparatus |
US7594779B2 (en) * | 2002-03-15 | 2009-09-29 | Farmers Irrigation District | Bottom fed screened water diversion apparatus |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO337512B1 (en) * | 2014-01-21 | 2016-05-02 | Sea Soul As | Methods and facilities for catching fish |
US10111413B2 (en) * | 2014-01-21 | 2018-10-30 | Sea Soul As | Method and device for taking up fish from a body of water |
JP2016211337A (en) * | 2015-05-13 | 2016-12-15 | 株式会社ダイクレ | Fishway installed on riverbed |
Also Published As
Publication number | Publication date |
---|---|
EP2116652A2 (en) | 2009-11-11 |
GB0808523D0 (en) | 2008-06-18 |
GB2460028A (en) | 2009-11-18 |
EP2116652A3 (en) | 2010-06-16 |
GB2460028B (en) | 2012-07-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |