WO2004071962A1 - 水質汚濁防止方法及び水流遮断フェンス - Google Patents
水質汚濁防止方法及び水流遮断フェンス Download PDFInfo
- Publication number
- WO2004071962A1 WO2004071962A1 PCT/JP2004/001561 JP2004001561W WO2004071962A1 WO 2004071962 A1 WO2004071962 A1 WO 2004071962A1 JP 2004001561 W JP2004001561 W JP 2004001561W WO 2004071962 A1 WO2004071962 A1 WO 2004071962A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- fence
- lake
- area
- algae
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
- E02B5/085—Arresting devices for waterborne materials, e.g. gratings
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B15/00—Cleaning or keeping clear the surface of open water; Apparatus therefor
- E02B15/04—Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
- E02B15/08—Devices for reducing the polluted area with or without additional devices for removing the material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B15/00—Cleaning or keeping clear the surface of open water; Apparatus therefor
- E02B15/04—Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
- E02B15/08—Devices for reducing the polluted area with or without additional devices for removing the material
- E02B15/0814—Devices for reducing the polluted area with or without additional devices for removing the material with underwater curtains
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/20—Prevention of biofouling
Definitions
- the present invention relates to a method for preventing water pollution to maintain a low level of algae generated and / or propagated in a lake or marsh when water is taken from a lake or marsh, and a water flow shutoff filter used for the method.
- Lakes and marshes mean dams, lakes, swamps, ponds, and other reservoirs for water use for water supply, industrial use, agricultural use, etc. Background art
- the conventional method of arranging the light shields has a problem that if the amount of water in the lakes and marshes is large, the amount of light shields to be disposed is enormous, which is not practical.
- the present invention has been made in view of the above situation, and an object of the present invention is to provide a method for efficiently preventing water pollution caused by algae in water bodies flowing into an intake channel, and a method for using the method. It is intended to provide a water flow blocking fence.
- a method for preventing water pollution according to the present invention is directed to a method for shading a part of the water surface of a lake or marsh having at least one inflow channel and at least one intake channel.
- a method of preventing water pollution by shading to prevent algae generation and Z or multiplication comprising: in a lake, a water pollution prevention area having at least one inflow channel and at least one intake channel.
- a water area dividing fence that suppresses the movement of algae is provided so as to be defined from the water area, and a light shield is moored or floated on at least a part of the water surface of the water pollution prevention water area to shield light. .
- the shading body is moored or suspended in the water pollution prevention water area defined from the other water area by the water area dividing fence and the inflow of algae is suppressed, and the shading is performed by shading.
- the area that should be shaded is 2004/001561
- the content of algae contained in the withdrawn water can be maintained at a low level even if the amount of the light-shielding body conventionally used is greatly reduced.
- the water area dividing fence has a water flow blocking fence that blocks a water flow in a region from the surface of the lake to a predetermined depth. It is.
- a part of the water flow blocking fence used in the water pollution control method of the present invention is shallower than a predetermined water depth (preferably within a water depth of 5 to 10 m) in a lake or marsh.
- the fixed water flow blocking fence of the water area dividing fence used in the water pollution control method of the present invention is a concrete wall or a steel sheet pile or a combination thereof.
- the mooring type water flow interception fence used in the water pollution control method of the present invention is provided with a floating body disposed on the water surface, one side of which is in contact with the floating body, and which is suspended from the floating body. It is preferable to be comprised from the curtain-shaped body performed.
- the mooring type water flow blocking fence more reliably blocks the water flow at a predetermined depth from the water surface in response to the change. Tend to be able to.
- the curtain is hanging from the floating body, so it responds to the change in the water flow. Curtain is hard to be damaged.
- the above-mentioned curtains are substantially rectangular and plural, and the curtains are arranged so that the side edges of adjacent curtains overlap each other. Is desirable.
- a light shield blocks light of 1/3 to 2/3 of the amount of water in the water pollution prevention water area.
- the water pollution prevention water area is defined from the other water areas by the water area dividing fence, and the inflow of algae is efficiently suppressed, so that the water volume of the water pollution prevention water area is 1 Z By shading 3 to 2/3, it is possible to prevent the occurrence and / or proliferation of algae in the water pollution prevention water area. Then, the water in the water pollution prevention area is withdrawn. Therefore, it is possible to efficiently reduce the algae of the water that is drawn without shading the entire lake from 13 to 23.
- the water blocking fence of the present invention has a predetermined depth from the lake surface.
- a water flow blocking fence that blocks water flow in the area between the floating body and the floating body, and a plurality of substantially rectangular curtains that are connected to the floating body and have one side connected to the floating body and that are suspended from the floating body. And a plurality of curtains are arranged so that side edges of adjacent curtains overlap with each other.
- the floating body responds to the change in the water level, so that the water flow from the water surface to a predetermined depth can be reliably shut off.
- the amount of water that moves due to flooding or the like increases, a gap is created between the curtains, and water can easily move, and damage to the curtains and damage to the water blocking fence can be reduced.
- the side edges of the curtains are arranged so as to overlap with each other, the water flow generated between the adjacent curtains can be efficiently shut off in normal times, so that the movement of algae can be more reliably performed. Can be suppressed.
- FIG. 1 is a schematic configuration diagram of a lake to which an embodiment of the water pollution control method according to the present invention is applied.
- FIG. 3 is a front view of a fence unit in one embodiment of the water flow blocking fence according to the present invention.
- FIG. 4 is a cross-sectional view of the fence unit.
- FIG. 1 is a schematic configuration diagram showing an embodiment in which the water pollution control method of the present invention is applied to lakes and marshes.
- Lake 1 is an inflow channel 2 into which water flows into Lake 1, Lake 1 It has a water discharge channel 3 for discharging water to regulate water volume and a water intake channel 4 for taking water from lake 1 as water.
- the lake 1 is divided into two water areas by the water area dividing fence 5 as shown in FIG. Therefore, the configuration of the water area dividing fence 5 will be described first with reference to FIGS.
- Water / Split Fence 5 controls the movement of algae between the waters of Lake 1.
- algae refers to suspended algae such as epiphytic algae and aoko.
- “suppressing the movement of algae” means that it is not necessary to completely block the movement of algae, and it is not more than 10 times less than the movement amount without the water area dividing fence 5, preferably 1/1 It suffices if it can be reduced to about 0 or less.
- the water area dividing funnel 5 is not particularly limited as long as it suppresses the movement of algae, and a so-called oil fence can also be used. It is preferable to have a water flow blocking fence that blocks water flow in a region from the water surface to a predetermined depth (preferably 5-1 Ora from the water surface). Note that “cut off the water flow” does not mean that the movement of water is completely cut off, but it does allow a small amount of water to move through the connection of the water flow cut off fence.
- lake 1 generally has a shallow water depth near the shore and a deep center portion.
- the part that partitions an area shallower than a predetermined water depth, such as near the shore may be a fixed type that has landed and is fixed to the lake bottom or lake shore.
- a portion that partitions an area deeper than a predetermined water depth, such as the center of the lake 1 does not land and is preferably of a mooring type moored to a floating body or the like.
- the predetermined water depth may be, for example, a depth at which floating algae such as seaweed inhabit, and is preferably a water depth of 5-1 Om.
- the water area dividing fences 5 of the present embodiment are fixed water flow blocking fences 5a and 5b, some of which are settled, and the other parts are not settled.
- the moored water flow blocking fence is 5 c.
- the fixed type water flow blocking fences 5a and 5b are installed in an area shallower than a predetermined water depth and fixed to the lake bottom or lake shore.
- the fixed water-blocking fences 5a and 5b are concrete walls, steel sheet piles, or a combination thereof.
- the fixed type water flow blocking fences 5a and 5b have a height up to an expected maximum water level. By doing so, it is possible to prevent the water from moving over the fixed type water blocking fences 5a and 5b at the time of rising water.
- the mooring type water flow blocking fence 5c is disposed between the fixed type water flow blocking fences 5a and 5b and in an area deeper than a predetermined water depth in the lake 1.
- tethered water blocking fence 5 c used in this embodiment is that the fence Interview knit Ui ⁇ U 9 as shown in FIG. 2 are coupled in series. Since each fence unit has the same configuration, the fence unit U i will be described below.
- FIG. 3 and FIG. 4 are a front view and a sectional view showing the configuration of the fence unit U i.
- the fence unit Ui includes a floating body 50 and a rectangular curtain 51 having one side attached to the floating body 50.
- the floating body 50 is composed of a round bar-shaped buoyancy member 50a having a predetermined length, and a coating layer 50 wound around the outer peripheral surface of the buoyancy member 50a.
- the buoyancy member 50a is, for example, a hollow structure made of a hard synthetic resin such as polyethylene terephthalate or a solid or hollow structure made of a hard synthetic resin foam, and the like. It is configured such that sufficient buoyancy can be given to the entire curtain 51.
- a material made of a flexible sheet member can be suitably used as the coating layer 50b.
- a material made of a flexible sheet member can be suitably used.
- Specific examples thereof include rubbers such as synthetic rubber and natural rubber, sheets made of synthetic resins such as soft polyvinyl chloride resin, polyethylene resin and polypropylene resin, and campuses made of various synthetic resin fibers.
- the axial length of the buoyancy member 50 a of the coating layer 50 b is equal to the buoyancy member 5 of the curtain 51. The length is almost the same as the axial length of 0a.
- the curtain 51 is sandwiched and fixed at both ends of a sheet-like member as a coating layer 50b wound around the outer peripheral surface of the buoyancy member 50a. Is connected to the buoyancy member 50a.
- the curtain 51 is preferably a flexible curtain such as a rubber sheet, a soft plastic sheet, or a canvas.
- the means for fixing the coating layer 50b and the curtain 51 is not particularly limited, but includes, for example, a solvent welding process, a hot air welding process, an adhesive bonding process, and port fastening. A fixing process using a physical fixing tool such as that described above can be suitably used. Further, a combination of these processes may be used.
- the lower portion of the curtain 51 is wound to form a cylindrical weight attachment portion 51a, and the weight attachment portion 51b is formed in the weight.
- the weight 53 made of metal or the like is fixed in the inserted state.
- the length from the buoyancy member 50a side of the curtain body 51 to the weight body attachment portion 51a side should be a length corresponding to a predetermined depth from the water surface that blocks the water flow. It is usually in the range of 5 to 1 Om. This is because the algae mainly exist in the area of 5 to 10 m from the water surface, so that the length of the curtain 51 in the depth direction is set to 5 to 1 Om to effectively suppress the movement of the algae Because you can.
- the length in the direction perpendicular to this is preferably about 10 to 15 m in consideration of transportation by truck or the like.
- Overlap portions 51d and 51e are set on the side edges 51b and 51c of the curtain 51.
- the buoyancy member 50a is not arranged at the portion of the floating body 50 corresponding to the overlapping margins 51d and 51e. That is, the predetermined length of the buoyancy member 50a is about the length of the buoyancy member 50a of the curtain body 51 excluding the overlap margins 51d and 51e from the axial length of the buoyancy member 50a. is there.
- the portion of the floating body 50 where the buoyancy member 50a is not arranged, that is, the portion of only the coating layer 50b is hereinafter referred to as a connecting portion 50b ', 50b ".
- the total area of the overlapping margins 51 d and 51 e in the curtain 51 is 5 to 20% of the total area of the shaped body 51 is preferable, and 7 to 15% is more preferable. If the area of the overlapping margins 51d and 51e is too small, the amount of overlap of the curtains 51 will be insufficient, and the water flow at the overlapping margins 51d and 51e will be insufficiently shut off. This is because it is possible. If the overlapping margins 51d and 51e are too large, the curtain 51 is not effectively used, and the cost performance is degraded. Furthermore, if the overlapping margins 51d and 51e are too large, they become substantially the same as one sheet, so that the load due to the water flow increases and the curtain 51 is easily damaged.
- tethered water blocking fence 5 c is fence units U i ⁇ U 9, series as shown in FIG. 2 along the line for dividing the body of water on the water surface, curtain-like body 5 1 Are formed so that the overlapping margins 5 1 d and 51 e are overlapped with each other.
- Fence Units Ui to U 9 are connected to adjacent Fence Units, for example, Fence Unit!
- the mooring type water blocking fence 5c is configured by connecting the fence units to form a single floating body by connecting the floating bodies 50 of each fence unit, and the floating body includes a plurality of floating bodies. Are arranged such that the side edges 51b and 51c of the adjacent curtain 51 overlap each other.
- the water area dividing fence 5 is configured such that the fence units U i, U 9 at both ends of the mooring type water flow blocking fence 5c are moored to fixed water flow blocking fences 5a, 5b with ropes or the like, respectively. It is attached to the fixed type water blocking fences 5a and 5b. It is preferable that the ropes to be moored have some allowance. Due to this margin, the horizontal position of the moored water-blocking fence 5c fluctuates within a relatively small width, but there is no particular problem. Next, a method for preventing water pollution according to the present embodiment using the water area dividing fence 5 will be described.
- the lake 1 is divided into two water bodies using the water area dividing fence 5 as shown in FIG. Then, in the divided lake 1, the water area having the inflow channel 2 and the intake channel 4 is set as the water pollution prevention water area A as shown in FIG.
- These light shields 6 may be installed in a state where they can float freely in the water pollution prevention water area A (free floating), or may be anchors on the water bottom or fixing members on the lake shore. It may be moored with ropes, etc., and installed with the movement restricted (moored floating).
- the number of light shields 6 arranged in the water pollution prevention water area A is not particularly limited, and the installation form (free floating Z moored floating), shape, size, etc. may be one or more than two. The above combination may be used. However, it is preferable that the light shielding body 6 shields the water in the water pollution prevention water area A from 1 to 3 to 23. As a result, the generation and Z or growth of algae in the water pollution prevention water area A can be efficiently prevented.
- the water area having the inflow channel 2 and the intake channel 4 is set as the water pollution prevention water area A.
- the water content of the water pollution prevention water area A is 1/3 to 2 Z3, and the shading body 6 shields the shading from light to suppress the generation and Z or growth of algae. Then, water from the water area where the generation and Z or growth of algae is suppressed is taken as water.
- the water area dividing fence 5 blocks the water flow from the water surface to a predetermined depth, so that it is possible to efficiently prevent the algae from flowing into the water pollution prevention water area A from another water area.
- the light shield 6 is moored or suspended in the water pollution prevention water area A where the inflow of algae from other water areas as described above is suppressed. It is only necessary to suppress the generation and growth or algae of algae only in the water pollution prevention water area A. Therefore, the shading body 6 can efficiently suppress the generation and growth or growth of algae.
- the area of light shielding must be increased as the size of the lake 1 increases, but in the case of the present embodiment, even if the lake increases, the water area increases.
- the water area having the inflow channel 2 and the intake channel 4 is divided by the dividing fence 5
- the water pollution prevention area is designated as A, so the shaded area does not depend on the size of the lake.
- the water pollution prevention water area A which is the area to be shielded from light, is limited, the generation of algae and the growth or growth of algae can be efficiently suppressed even if the number of the light shielding bodies 6 is smaller than before.
- tethered water blocking fence 5 c in the present embodiment as described above Fensuyu - Tsu DOO U i ⁇ U 9 a are those which are coupled in series, the adjacent curtain-like body 5 1 The side edges 51b and 51c overlap each other.
- the mooring type water blocking fence 5c is formed by connecting the floating bodies 50 of the respective fence units when the respective fence units are connected, as one floating body.
- the fixed water flow blocking fences 5a and 5b are concrete walls, steel sheet piles, or a combination thereof, for example, a hard plate-like body such as a plastic plate may be used.
- water pollution of algae in a water area flowing into an intake channel can be efficiently prevented.
- water flow shutoff device of the present invention to the above-mentioned water pollution prevention method, it is possible to efficiently and reliably prevent water pollution of algae in the water area flowing into the intake channel.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Catching Or Destruction (AREA)
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2004210782A AU2004210782A1 (en) | 2003-02-13 | 2004-02-13 | Method of preventing water pollution and water-blocking fence |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-035239 | 2003-02-13 | ||
JP2003035239A JP4330350B2 (ja) | 2003-02-13 | 2003-02-13 | 水質汚濁防止方法及び水流遮断フェンス |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004071962A1 true WO2004071962A1 (ja) | 2004-08-26 |
Family
ID=32866291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/001561 WO2004071962A1 (ja) | 2003-02-13 | 2004-02-13 | 水質汚濁防止方法及び水流遮断フェンス |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP4330350B2 (ja) |
CN (1) | CN100361902C (ja) |
AU (1) | AU2004210782A1 (ja) |
WO (1) | WO2004071962A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2004556C2 (en) * | 2010-04-15 | 2011-10-18 | Mfde B V | Method for inhibiting and/or preventing the growth of algae in a lake or shallow water. |
ITTO20130200A1 (it) * | 2013-03-15 | 2014-09-16 | Aronne Armanini | Struttura di ritenuta dei sedimenti in corsi d'acqua |
US9221573B2 (en) | 2010-01-28 | 2015-12-29 | Avery Dennison Corporation | Label applicator belt system |
FR3094993A1 (fr) * | 2019-04-11 | 2020-10-16 | Joel Lesser | Dispositif maintenant couverts des hydrobiontes photosynthétiques dérivants, les privant de lumière, et les procédés d’élimination et de récolte associés. |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5058178B2 (ja) * | 2007-01-19 | 2012-10-24 | 株式会社クレハ環境 | 耐浮上性水上フロート |
JP5955568B2 (ja) * | 2012-01-24 | 2016-07-20 | 中国電力株式会社 | 通船ゲート |
JP5923019B2 (ja) * | 2012-09-28 | 2016-05-24 | 海和テック株式会社 | 分画フェンス |
CN114772666B (zh) * | 2022-05-27 | 2023-08-18 | 武汉中科水生环境工程股份有限公司 | 一种湖泊藻类原位调控方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000263034A (ja) * | 1999-03-16 | 2000-09-26 | Veritas:Kk | 富栄養化した湖沼等における藻類を減少又はその増殖を抑制する方法、及びそのための装置 |
JP2001159127A (ja) * | 1999-12-03 | 2001-06-12 | Bridgestone Corp | 浮遊物回収フェンス |
JP2001321794A (ja) * | 2000-05-15 | 2001-11-20 | Veritas Corp | 湖沼等におけるアオコの制御方法 |
-
2003
- 2003-02-13 JP JP2003035239A patent/JP4330350B2/ja not_active Expired - Fee Related
-
2004
- 2004-02-13 CN CNB200480000564XA patent/CN100361902C/zh not_active Expired - Fee Related
- 2004-02-13 AU AU2004210782A patent/AU2004210782A1/en not_active Abandoned
- 2004-02-13 WO PCT/JP2004/001561 patent/WO2004071962A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000263034A (ja) * | 1999-03-16 | 2000-09-26 | Veritas:Kk | 富栄養化した湖沼等における藻類を減少又はその増殖を抑制する方法、及びそのための装置 |
JP2001159127A (ja) * | 1999-12-03 | 2001-06-12 | Bridgestone Corp | 浮遊物回収フェンス |
JP2001321794A (ja) * | 2000-05-15 | 2001-11-20 | Veritas Corp | 湖沼等におけるアオコの制御方法 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9221573B2 (en) | 2010-01-28 | 2015-12-29 | Avery Dennison Corporation | Label applicator belt system |
US9637264B2 (en) | 2010-01-28 | 2017-05-02 | Avery Dennison Corporation | Label applicator belt system |
NL2004556C2 (en) * | 2010-04-15 | 2011-10-18 | Mfde B V | Method for inhibiting and/or preventing the growth of algae in a lake or shallow water. |
ITTO20130200A1 (it) * | 2013-03-15 | 2014-09-16 | Aronne Armanini | Struttura di ritenuta dei sedimenti in corsi d'acqua |
WO2014141096A1 (en) * | 2013-03-15 | 2014-09-18 | Armanini Aronne | Stream debris restraining structure |
AU2014229305B2 (en) * | 2013-03-15 | 2017-12-21 | Officine Maccaferri S.P.A. | Stream debris restraining structure |
US10767330B2 (en) | 2013-03-15 | 2020-09-08 | Officine Maccaferri S.P.A. | Stream debris restraining structure |
FR3094993A1 (fr) * | 2019-04-11 | 2020-10-16 | Joel Lesser | Dispositif maintenant couverts des hydrobiontes photosynthétiques dérivants, les privant de lumière, et les procédés d’élimination et de récolte associés. |
Also Published As
Publication number | Publication date |
---|---|
JP4330350B2 (ja) | 2009-09-16 |
JP2004261642A (ja) | 2004-09-24 |
AU2004210782A1 (en) | 2004-08-26 |
CN100361902C (zh) | 2008-01-16 |
CN1697783A (zh) | 2005-11-16 |
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