WO2004090235A1

WO2004090235A1 - Flood control and water supply system using tide generator by “sea hollow (utsuro)”

Info

Publication number: WO2004090235A1
Application number: PCT/JP2003/004422
Authority: WO
Inventors: Kazuaki Akai
Original assignee: Kazuaki Akai
Priority date: 2003-04-07
Filing date: 2003-04-07
Publication date: 2004-10-21
Also published as: JP3823998B2; CN1764760B; JPWO2004090235A1; CN1764760A

Abstract

“Sea hollow (UTSURO)” is part of a water area surrounded and enclosed by a bank structure in a tide-level-changing water area. By using a tide generator by a “sea hollow (UTSURO)” which spreads a canal mouth that opens a “sea hollow (UTSURO)” water area via a canal toward a river’s upstream part to open it in a tide-level-changing river-upstream water area, the functional extension of a rive is shortened, a river bed gradient is steepened, the flow rate and the tractive force of a river are increased, a river bed is deepened, a river section area is enlarged, and a drainage of inner basin and a flood discharge capacity are increased. At a downstream part, the size of “sea hollow (UTSURO)” A is increased, a tidal stream producing capacity is boosted, a tidal stream as large in quantity as a flood is produced, and a water stream section area is enlarged, thus contributing to a flood control effect and water way maintenance. In addition, in order to remove enormous amounts of sand and earth forced to flow to a river mouth and deposited on a river channel, another holes-rich “sea hollow (UTSURO)” B is installed to capture slurry by the action of high tide for precipitating and cleaning to thereby develop tidal flats and reclaimed lands, and, at a low tide, clean supernatant is collected into a channel to thereby produce tide. Furthermore, the installing of an outer block-enclosing bank (8) can prevent the outflow of slurry into an outer water area and further enhance their effects to maintain a canal. Additionally, in order to maintain the functions of the “sea hollow (UTSURO)” A, a canal length is increased to prevent a turbid water inflow.

Description

Flood control and water use system using tidal current generator by "oceanic sky (UTSUR0)"

The present invention relates to a flood control and water use system using a tidal current generator by "ocean sky (UTSUR0)". Bright

Background art

Field

Due to sand and mud flowing out from the upstream part of the river, and in the last century, river extension will gradually increase due to reclamation on both sides of the estuary, and the riverbed slope of the whole river will be relaxed. As a result, sediment settles in the river channel, the riverbed rises, and the flood communication capacity of the river is reduced, making it difficult for the transportation and inland water removal.

In the past, riverbeds have been artificially excavated or riverbeds have been installed in the rivers to maintain the riverbeds deep by the energy flow of the rivers. And there was a problem with inland water removal.

Therefore, using the tidal current generator based on the “ocean sky (UTSUR0)”, which has been under development for some time, actively introduce tidal energy for rivers and estuaries affected by the tide. By maintaining the river downstream and the estuary, the functional river extension can be shortened, the riverbed slope can be enhanced, and it can be used for flood control. Actively take in polluted water that has flowed out from the upstream part and use it to improve flood communication capacity, purify polluted water from rivers, create tidal flats and land, and use it to hold river water. Disclosure of the Invention

The present invention, as shown in FIG. 1, refers to a water area that has been closed by a levee structure as “ocean sky (UTSR0)”, and “ocean sky (UTSR0)” A The waterway opening the water area through the water channel extends toward the upstream part of the river, and opens in the river upstream water area with changing tide levels. The tidal current generator by the Oceanic Sky (UTSURO) JA makes it downstream from the opening Section Lb becomes a river controlled by the tide, and if it is assumed that the conventional river extension Lo, The length is the extension La of the (Lo-Lb) river J 11 upstream, which can shorten the functional extension of the river. By redistributing the role of tidal energy and river flow energy, the upstream region will be superior to the conventional river flow energy, and the estuarine region will actively introduce tidal energy to achieve tidal energy. In the upstream area, the functional extension of rivers will be shortened and used for flood control.

In the mountainous area upstream of the river, the riverbed height does not change so much, but in the alluvial plain, the shorter the river function extension, the larger the riverbed slope, the higher the flow velocity, the higher the sweeping power, and the riverbed It is deeply washed, and the flood passage cross section of the river is enlarged, and the overhead river can be eliminated, and the flood control effect of the upstream can be enhanced.

In addition, in the downstream part of the river, the scale of “Marine Sky (UTSUR0)” shown in Fig. 1 is increased to increase the tidal current generation capacity, thereby increasing the tidal flow in the downstream part. By increasing the flow capacity, deepening the riverbed, and always securing a flood communication cross section, it is intended to contribute not only to the flood control effect at the downstream but also to the drainage of inland water and the maintenance of the channel at the estuary. is there.

In the estuary, sand and mud that has flowed out from the upstream sinks in the river channel due to the decrease in the flow velocity and makes the river channel shallow. For this reason, we will select “Aquatic Sky (UTSUR0) B” (static water purification area), which will be closed by a permeable structure with multiple voids, by selecting a water area that can be reclaimed or tidal flats in the future. At the time of rising tide, the upstream water is scoured and taken up the drained muddy water, and the mud of the muddy water is made to settle using the calm water of the oceanic sky (UTSURO) JB to create a tidal flat and a landfill site. At the same time, in some cases, the purified water is collected in the river channel, and in addition to the tidal current generated by the “oceanic sky (UTSUR0)” A, the flow in the estuary is increased to maintain the river channel cross section.

In addition, by installing the embankment 8 that encloses the outer shell of “Marine Sky (UTSURO)” B, the outflow of mud water to the open sea 6 is prevented, the tidal current in the estuary is increased, and Maintain and enrich the fishery resources of the river water area, further enhance flood communication ability, maintain the channel, and enhance flood control and water use effect.

Also, in order to permanently maintain the function of the tidal current generator by "ocean sky (UTSUR0)" A, in order to prevent the inflow of river mud water by the tide of "ocean sky (UTSUR0)" A, "Open ocean channel (UTSR0)" A. Extend the length of the open channel 3 of L b, L b> L t X a However, (L t; the length of the open channel from the river in the open channel; It is necessary to satisfy the condition of,). (Therefore, the open channel 3 is also called a pollution control channel.) Brief description of the drawings

Fig. 1 is a schematic drawing of the river. A tidal flow generation device by "oceanic sky (UTSURO)" A at the branch of the estuary, and "oceanic sky (UTSURO)" which takes in the runoff sand at the estuary of the main stream. It is the top view which installed B.

FIG. 2 is a longitudinal sectional view of the main river in FIG.

Fig. 3 is a cross-sectional view of each river.

The a- a cross section is a cross-sectional view of five water areas upstream of the river.

b-b cross section is a cross-sectional view of four water areas downstream of the river.

c-c cross section is a cross-sectional view of the tidal channel 3;

dd cross section is a cross section of the estuary water area.

[Description of the code]

1 Deadline that constitutes "Marine Sky (UTSURO)" A

2 Inland waters of "oceanic sky (UTSURO)" A

3 "Open Ocean" (UTSURO) A open channel (also referred to as pollution control channel)

4 downstream of the river

5 upstream of the river

6 Outer water area

7 Land or Reservoir

8 "Sea Ocean Sky (UTSURO)" B penetrating levee

8 'Arm which surrounds the outer part of' Marine Sky (UTSURO) 'B

9 Inland Waters of the Oceanic Sky (UTSURO) B

9 'Sand mud settled in the inner waters of' Marine Sky (UTSURO) 'B

1 0 Conventional riverbed height

1 1 Conventional river water level

1 2 Conventional river ridge height

1 3 HHWL of conventional river

1 4 Traditional river embankment height

1 5 determined riverbed

1 6 Stable riverbed of new river 1 7: New scallops scoured directly by tidal current, riverbed

1 8: Tide T HWL

1 9: Tide T LWL

20: Riverbed excavated by tidal current

^: Direction of current (outflow) caused by the fall of the outer water level

^: Direction of current (outflow) generated by rising water level (upper tide) Best mode for carrying out the invention

In order to describe the invention in more detail, it will be described according to the attached drawings.

As shown in the plan view of Fig. 1, in the water area with tide change, the water area enclosed by the levee structure 1 is called "ocean sky (UTSR0)" and "ocean sky (UTSRO)". The waterway opening the water area of JA by waterways is extended toward the upstream part of the river, and is opened in the river upstream water area with changing tide level. By the tidal current generator by "Marine sky (UTSUR0)" A, from the opening The downstream section Lb will be a river dominated by tides, and with the conventional river extension Lo, the functional extension of the river will be (Lo-Lb) an extension La of the upstream part of the river, and the functional extension of the river can be shortened. . In the process of river formation, the alluvial plain is formed by runoff sand and mud, and as the size of the river increases, and as it becomes a slow-flowing river, the main river in the estuary is divided into several tributaries and the sea To flow. At the estuary of such a tributary 3, the water area which is closed and closed by the impermeable levee 1 which forms the “ocean sky (UTSRO)” A shown in FIG. 1 is formed, and the tributary 3 is If the tide level changes in the open sea 6 by opening to the main river 4, through the downstream part 4 of the river, through the tributary 3 (open channel), repeat the inflow and outflow to the oceanic sky (UTSURO) A .

If the natural flow Qo of the river and the tidal current Qc flowing out from the “oceanic sky (UTSUR0)” A, then the amount of water Qb in the downstream part of the river 4 at the ebb tide is (Qb = Qo + Qc,). Although the intrinsic natural flow Qo of the river is limited by the river, the tidal current Qc flowing out of the "ocean sky (UTSUR0)" A can be increased according to the size of the "ocean sky (UTSUR0) A". is there.

By increasing the size of “Marine Sky (UTSUR0)” A and constructing “Marine Sky (UTSUR0)” A of a scale that matches tidal discharge flow rate Qc to flood flow of the river, In the water area, tidal volume Qb, which is always comparable to the flood flow, will be repeatedly flowing in and out.

Thus, even if a huge tidal current comparable to a flood flows into the river mouth 4 Because the flow is generated by the sea surface, the flow below sea level (less than THWL) does not overflow the land levee height.

Therefore, as shown in Fig. 1, by constructing "Marine sky (UTSUR0)" A at the mouth of tributary 3, the extension Lb of the downstream part 4 of the river in shape is the downstream part of the river J11. It seems to be composed, but functionally it has the characteristics of a strait or a weir. Therefore, assuming that all conventional rivers are Lo, (Lo-Lb), that is, the river extension La of the upper stream part becomes the function extension of a new river.

Assuming that the riverbed height in the upstream of the conventional river is Ho, the conventional riverbed slope I 0 is (Ho / Lo), and the new riverbed slope I a is (Ho / (L− Lb)). As shown in the figure, I o <Ia, and the bed slope becomes large.

As the riverbed slope in the upper stream increases, the flow velocity increases, the sweeping force is enhanced, the riverbed is deeply washed, and the flood passage cross section of the river becomes larger. This will gradually eliminate the overhead river and enhance flood control capacity.

Also, in the downstream part 4 of the river, the scale of “ocean sky (UTSUR0)” A shown above is enlarged, and the tidal stream comparable to the flood flow of the river is generated to deepen the riverbed, The river improvement effect of river J11 downstream part 4 can be enhanced.

Furthermore, in the estuary, the huge sand and mud that has flowed out from the upstream sinks in the river channel and makes the river channel shallow, which hinders the flood communication capability and ship navigation. '

For this reason, in the water area of the estuary, another “oceanic sky” is selected, which is closed by a multi-voided bank (bank with transparent structure) 8 by selecting a water area that can be reclaimed or tidal flat in the future.

(UTSURO) j B (Quietly Clearing Water Area), using the action of the tide rising tide, the muddy water of the huge river that has flowed out to the estuary “Ucean sky (UTSURO) JB and B 'water area 9 In the river, create tidal flats and landfills, collect sedimented clean water at the time of ebb tide on the river channel, generate tidal current in the river channel, and increase the drainage capacity of the river channel in the estuary. Contribute to the maintenance of the channel by maintaining the channel deep and maintaining the flood flow cross section at the estuary at all times.

Furthermore, by setting up the dike 8 'with an impermeable or semi-impermeable dike that encloses the outer shell of the Oceanic Sky (UTSURO) JB, the outflow of muddy water to the open sea 6 is prevented, Maintain the brackish water area of the estuary, enrich the fishery resources of the river water area, increase tidal current in the estuary area, increase the flood communication capacity, and enhance the maintenance of the channel and flood control effect. Also, in order to permanently maintain the function of the tidal current generator by "ocean sky (UTSUR0)" A, in order to prevent the inflow of polluted water from the river into "ocean sky (UTSUR0) A", Ocean sky (UTSR0) A Extending the open channel 3 of A Extend L b, L b> V b X t X a, V b; Average velocity of the open channel, t: Time of rising tide, α: Diffusion of channel It is necessary to satisfy the condition of coefficient,. (Therefore, the open channel is also referred to as the "ocean sky (UTSUR0) A pollution control channel.") Possibility of industrial use

At the mouth of the river, the extension of the river gradually increases due to the sediment flowing out from the upstream part and by reclamation of the rainbank in the last century, the riverbed slope of the whole river becomes loose, and the flood communication capacity of the river Has fallen. In addition, the riverbed at the estuary has risen, making it difficult to remove heavy water and inland water.

For this reason, in addition to the energy by gravity of conventional rivers, natural energy is used, tidal energy is predominant in the downstream part, maintenance of the river channel is planned, muddy water is cleaned, and muddy water is collected. It is intended to create large tidal flats and landfills, and the implementation period is to be implemented in a short period of time, such as floods and high tides, and is environmentally friendly rather than being maintained by conventional machinery such as oil and coal. The system has great potential for industrial use.

Claims

The scope of the claims

1. In a water area with changing tides, the water area enclosed by the levee structure is called "ocean sky (UTSR0)", and the waterway opening the water area of "ocean sky (UTSR0)" A with waterways is It extends toward the upper stream of the river and opens in the upper stream waters of the tide level.

(UTSUR0) ”With the tidal current generator by A, the section Lb downstream from the open mouth becomes a river dominated by tides, and assuming the conventional river extension Lo, the functional extension of the river is (Lo−Lb) upstream of the river It becomes extension La and can shorten the functional extension of the river.

Therefore, assuming the riverbed height Ho at the uppermost stream of the river, the riverbed J «I 3⁄4 M ^ 3⁄43 naturally becomes the stable gradient I a (Ho / Lo-Lb) with the conventional riverbed slope I o (Ho / Lo) · At Io K la, the riverbed slope increases, the river flow velocity increases, the riverbed's sweeping power increases, the riverbed is scoured, the riverbed becomes deeper, the river flow cross section becomes larger, and the flood communication capacity is increased. A flood control and irrigation system using a tidal current generator by the Oceanic Sky (UTSURO) J, which is characterized by enhancing the flood control effect and inland water removal effect in the upper stream part of the river.

2. In the downstream part of the river, “increase the size of oceanic sky (UTSURO) j A to increase tidal power generation capacity, generate tidal currents comparable to the river's The river cross section in the lower part of the river is enlarged, the flood communication capacity in the lower part of the river is increased, and the maintenance of the channel and the flood control effect are enhanced. Flood control and irrigation system using raw equipment.

3. In the estuary area, install “Marine Ocean Sky (UTSUR0) B” which is closed with a multi-voided permeable structure in tidal flats and land areas that can be reclaimed in the future. The muddy water deposited on the river channel is

(UTSURO) Incorporated in JB to settle and purify muddy mud, create tidal flats and landfills, and collect clear, washed sedimentary water in rivers during tidal currents to generate tidal currents and prevent estuarine blockage The river improvement and water use system using the tidal current generator with the “Ocean Sky (UTSUR0)” is characterized by maintaining the river channel, enhancing the flood communication capacity, and enhancing the channel maintenance and flood control effect.

4. By setting up a levee that encloses the outer shell of “Marine Sky (UTSUR0)” B, the outflow of mud water to the open sea 6 is prevented, the tidal current in the estuary is increased, and the brackish water area of the estuary is maintained. Enrich the fishery resources of the river water area, increase the flood communication capacity, and enhance the maintenance of the channel and the flood control effect. Flood control and water use system using a tidal current generator based on the “ocean sky (UTSUR0)”.

5. In order to maintain the function of the oceanic sky (UTSUR0) A's tidal current generator, the term “oceanic sky (UTSRO)” A open channel 3 (contamination control channel) is called “contaminated channel 3”. From the opening of the oceanic sky (UTSR0) A, the ratio of the incoming tide length L t of the oceanic sky (UTSR0) A is reduced, and (UTSUR0) ”for flood control and water use system using tidal generator.