CN108755620A - A kind of attracting fish method changing flow direction-changing angle - Google Patents
A kind of attracting fish method changing flow direction-changing angle Download PDFInfo
- Publication number
- CN108755620A CN108755620A CN201810584162.2A CN201810584162A CN108755620A CN 108755620 A CN108755620 A CN 108755620A CN 201810584162 A CN201810584162 A CN 201810584162A CN 108755620 A CN108755620 A CN 108755620A
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- China
- Prior art keywords
- fish
- dam
- changing
- angle
- gathering
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
- E02B1/006—Arresting, diverting or chasing away fish in water-courses or water intake ducts, seas or lakes, e.g. fish barrages, deterrent devices ; Devices for cleaning fish barriers
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
The invention discloses a kind of attracting fish method changing flow direction-changing angle, this method is to make between dam and the fish gathering gallery of riverbank side that there are certain angles when building dam；The junction of the dam and fish gathering gallery passes through round-corner transition.The present invention changes the flow direction of attracting flow by changing the angle of fish lift fish gathering gallery and dam, allows the induction water (flow) direction that fish is more sensitive, significantly improves fish gathering efficiency.Meanwhile the angle by changing dam and riverbank, the local head loss of fish inlet is advantageously reduced, fish gathering efficiency can be effectively improved；And fish gathering gallery and dam angle are adjusted to fillet, the local head loss of fish inlet can be further decreased, fish-gathering effect is obviously improved.
Description
Technical field
The present invention relates to a kind of attracting fish method changing flow direction-changing angle, the fish auxiliary belonged in ecological water conservancy project is migrated
Technical field.
Background technology
Dam is built on natural river, has blocked the migration channel of natural river Mesichthyes.This is taken both at home and abroad
Build the remedial measures such as fish pass, fish lift.In fish gathering gallery in fish pass and fish lift, overcurrent flow is smaller, and fish are from river
It flows down during the inverse water (flow) direction of trip traces back, is not easy to sense flow direction, it is difficult to the entrance for finding fish pass and fish lift, from
And reduce the fish gathering efficiency of fish pass and fish lift.Therefore, how to improve fish gathering efficiency is the key that fish pass and fish lift design
One of technology.
Currently, the attracting fish method proposed both at home and abroad is more, most of is the transformation of fish-aggregating device.Mainly have fish gathering net cage and
The transformation of its affiliated facility, change of fish channel structure etc..Such as the Chinese utility model patent that Authorization Notice No. is CN2829357
In describe a kind of help fish and pass through patent intermediary that the fish gathering net cage and Authorization Notice No. of dam are CN205419686U
Continued dam structure on a kind of rail mounted fish-collecting box, and the above patent structure is complex, and actual operating efficiency need to be investigated.Separately
Outside, the change class patent of fish channel structure is more, such as vertical seam type fish channel, winding type fish pass, multistage folded arc formula fish pass.Such as it authorizes
A kind of tunnel type fish pass is described in the patent that notification number is CN205421201U, its water stream characteristics, the gradient, construction, which pass through, to be set
The gentle water installations of raised line being equipped with and natural river are quite similar, can preferably improve fish gathering efficiency；Authorization Notice No. is
A kind of multistage is described in the patent of CN204000792U and helps drive formula ecological fishway facility, is suitable for middle and high head key water control project
Fish pass building.The above patent changes the hydrodynamic condition in fish pass, significantly improves collection by the geometry of change fish pass
Fish efficiency, but above method is not particularly suited for the fish gathering gallery in fish lift.And at present both at home and abroad for fish gathering improved efficiency
Research is limited only to transformation fish pass structure, has ignored the transformation for the hydraulic structure for causing fish to deaden, such as dam position
Change etc..
Invention content
The purpose of the present invention is to provide a kind of attracting fish method changing flow direction-changing angle, this method can be suitably used for a liter fish
The fish gathering gallery of machine changes the flow direction of attracting flow, makes fish more sensitive by changing the angle of fish lift fish gathering gallery and dam
Induction water (flow) direction, significantly improve fish gathering efficiency.
Technical scheme of the present invention：It is a kind of change flow direction-changing angle attracting fish method, this method be when building dam,
Make between dam and the fish gathering gallery of riverbank side that there are certain angles.
Further, the angle value on the dam and riverbank is 30~60 °.
Further, the junction of the dam and fish gathering gallery passes through round-corner transition.
By adopting the above-described technical solution, the advantage of the invention is that：The present invention is by changing fish lift fish gathering gallery
With the angle of dam, and then change the flow direction of attracting flow, allows the induction water (flow) direction that fish is more sensitive, significantly improve fish gathering effect
Rate.Meanwhile the angle by changing dam and riverbank, the local head loss of fish inlet is advantageously reduced, can effectively be carried
High fish gathering efficiency；And fish gathering gallery and dam angle are adjusted to fillet, the part of fish inlet can be further decreased
Head loss is obviously improved fish-gathering effect.
Description of the drawings
Fig. 1 is the structural schematic diagram when present invention is implemented；
Fig. 2 is the hydrodynamic model schematic diagram of the present invention；
Fig. 3 is the hydrodynamic model schematic diagram of existing dam.
Reference sign：1- dams；The riverbanks 2-；3- fish gathering gallerys；4- fillets.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples to this hair
It is bright to be described in further detail.
The embodiment of the present invention：Referring to Fig. 1, a kind of attracting fish method of change flow direction-changing angle of the invention, this method
It is to make between the fish gathering gallery 3 of 2 side of dam 1 and riverbank there are certain angle α, and angle α value when building dam 1
It is 30~60 °.The dam 1 and the junction of fish gathering gallery 3 pass through 4 transition of fillet.
Change front and back hydraulics state to the angle α of dam 1 and riverbank 2 to analyze, such as Fig. 2 and Fig. 3.Upstream flow
Enter downstream river course by fish gathering gallery 3, the local head loss in fish inlet can be obtained by calculation.According to《Waterpower
It learns (fourth edition)》It is found that local head loss is in open channel：
In formula：
hj, local head loss；
ξ, local loosening；
V, mean flow rate.
During upper water flows through the inflow downstream river course of fish gathering gallery 3, the head loss of generation is bigger, fish inlet
Flow it is then more slow, fish-gathering effect is poorer.《Hydraulics (fourth edition)》Middle annex " coefficient of roughness, pipeline and the various parts of open channel
Waterhead fall " refers to table 1：
1 coefficient of roughness of table, pipeline and the various local loosenings of open channel
As shown in Table 1, the hydraulic model before and after 1 angulation change of dam corresponds to " open channel is prominent to be put " respectively and " open channel is gradually
It puts ".And 10 times or more that general river width is 3 width of fish gathering gallery, it is known that when 1 angle of dam does not change, local head
Loss coefficient ξ1About 0.81~0.98；After dam angulation change, α values are 30 °~60 °, local loosening ξ2About
It is 0.24~0.32.According to the calculation formula in table 1 it is found that the local head loss of " open channel is gradually put " is much smaller than " open channel is prominent
Put ", therefore, changes the local head loss that 1 angle of dam advantageously reduces fish inlet, fish gathering efficiency can be effectively improved.
In addition, as shown in Table 1, the local loosening of " the right angle entrance of channel " is 0.4, and " curved surface of channel enters
Mouthful " local loosening be 0.1, therefore again by the junction of fish gathering gallery 3 and dam 1 by fillet (4) transition after,
The local head loss that fish inlet can effectively be reduced, is obviously improved fish-gathering effect.Dam after adjustment and fish gathering gallery
See Fig. 1.
Therefore, the present invention is by changing the angle of the fish gathering gallery 3 and dam 1 of fish lift, and then changes attracting flow
Flow direction, allows the induction water (flow) direction that fish is more sensitive, significantly improves fish gathering efficiency.Meanwhile the folder by changing dam 1 and riverbank 3
Angle advantageously reduces the local head loss of fish inlet, can effectively improve fish gathering efficiency；And by fish gathering gallery 3 and greatly
Dam presss from both sides 1 jiao and is adjusted to fillet 4, can further decrease the local head loss of fish inlet, be obviously improved fish-gathering effect.
Claims (3)
1. a kind of attracting fish method changing flow direction-changing angle, it is characterised in that：When building dam (1), make dam (1) and river
There are certain angle (α) between the fish gathering gallery (3) of bank (2) side.
2. the attracting fish method according to claim 1 for changing flow direction-changing angle, it is characterised in that：The dam and riverbank
Angle (α) value be 30~60 °.
3. the attracting fish method according to claim 1 for changing flow direction-changing angle, it is characterised in that：The dam (1) with
The junction of fish gathering gallery (3) passes through fillet (4) transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810584162.2A CN108755620A (en) | 2018-06-08 | 2018-06-08 | A kind of attracting fish method changing flow direction-changing angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810584162.2A CN108755620A (en) | 2018-06-08 | 2018-06-08 | A kind of attracting fish method changing flow direction-changing angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108755620A true CN108755620A (en) | 2018-11-06 |
Family
ID=63999436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810584162.2A Pending CN108755620A (en) | 2018-06-08 | 2018-06-08 | A kind of attracting fish method changing flow direction-changing angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108755620A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254889A (en) * | 2020-03-20 | 2020-06-09 | 交通运输部天津水运工程科学研究所 | Fishway inlet water supplementing system, fishway and water supplementing method |
| CN116464005A (en) * | 2023-05-11 | 2023-07-21 | 中国水利水电科学研究院 | Fish guiding weir system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100955709B1 (en) * | 2008-12-30 | 2010-05-04 | 이지현 | Fish way |
| CN105804029A (en) * | 2016-03-22 | 2016-07-27 | 四川大学 | Water-supplementing fishway inlet device with ecological gate |
| CN106192935A (en) * | 2016-08-26 | 2016-12-07 | 中国水利水电科学研究院 | The method of adjustment of a kind of fish pass import department river flow and system |
| CN206052662U (en) * | 2016-09-30 | 2017-03-29 | 三峡大学 | The device of attracting effect is imported and exported for strengthening fish pass |
| DE202017002605U1 (en) * | 2017-05-11 | 2017-06-29 | Guido Becker | Fish ladder |
-
2018
- 2018-06-08 CN CN201810584162.2A patent/CN108755620A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100955709B1 (en) * | 2008-12-30 | 2010-05-04 | 이지현 | Fish way |
| CN105804029A (en) * | 2016-03-22 | 2016-07-27 | 四川大学 | Water-supplementing fishway inlet device with ecological gate |
| CN106192935A (en) * | 2016-08-26 | 2016-12-07 | 中国水利水电科学研究院 | The method of adjustment of a kind of fish pass import department river flow and system |
| CN206052662U (en) * | 2016-09-30 | 2017-03-29 | 三峡大学 | The device of attracting effect is imported and exported for strengthening fish pass |
| DE202017002605U1 (en) * | 2017-05-11 | 2017-06-29 | Guido Becker | Fish ladder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254889A (en) * | 2020-03-20 | 2020-06-09 | 交通运输部天津水运工程科学研究所 | Fishway inlet water supplementing system, fishway and water supplementing method |
| CN116464005A (en) * | 2023-05-11 | 2023-07-21 | 中国水利水电科学研究院 | Fish guiding weir system |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20190911 Address after: 550081 No. 187 Shilin West Road, Guanshan Lake District, Guiyang City, Guizhou Province Applicant after: Guizhou Water Resources Investment (Group) Co., Ltd. Applicant after: Guizhou Survey & Design Research Institute for Water Resources and Hydropower Address before: 550002 No. 27 South Baoshan Road, Nanming District, Guizhou, Guiyang Applicant before: Guizhou Survey & Design Research Institute for Water Resources and Hydropower |