Natural farm established in breakwater block water area and deep water upwelling device for the same

Abstract

To provide the construction and a method of a natural farm that gives no stress to an aquatic organism, causes no risk of disturbing an environment due to escape, is safe, and has low costs by installing an escape and hiding place of a juvenile fish, protecting the juvenile fish, improving a survival rate of the juvenile fish, culturing the juvenile fish by natural predation of an organism, employing water quality with natural purification action, and culturing the juvenile fish in the same ecosystem as that in the ambient, and to create a rich fishing place in a coast by discharging deep ocean water onto a front layer of a sea level having poor nutrition.SOLUTION: Proliferation is achieved by protecting a juvenile fish by providing: a surrounding part provided in a land side water area of an offshore breakwater block, having no bottom surface, having a lower end edge portion always contacting a water bottom, and having an upper end edge portion always being over the water level; and a hiding place for a juvenile fish that has entered the place through a clearance part, that is provided in the surrounding part, and to and from which a juvenile fish can enter and exit and an adult fish cannot enter and exit, and by fertilizing the periphery of the surrounding part by a deep water upwelling device.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to marine life farms and deep water upwelling devices. [Background technology]

[0002] As calm waters such as inlets suitable for aquaculture become scarce, technology is being developed to create new aquaculture sites in areas previously unsuitable for aquaculture, such as the open ocean and on land (see Non-Patent Document 1). However, in order to cope with the rough waves of the open ocean, the fish pens are large and sturdy, and must be submerged in bad weather, which poses many challenges, including huge initial costs, profitability, and operation methods.

[0003] Problems with aquaculture in general include the cost of feed and the risk of overfishing of the wild fish that are used as raw materials. B. Water pollution and purification costs are high. C. When cultivating species that are different from the surrounding ecosystem, there is a risk that the fish pens will be damaged in bad weather, causing the organisms to escape and negatively impacting the ecosystem. Inventions that address these issues are needed.

[0004] The amount of fish caught along the coast has been declining sharply, and the main cause is believed to be the decline in seaweed beds due to rising seawater temperatures and nutrient depletion in the seawater. As a countermeasure, deep seawater intake has been invented (see Patent Document 1).

[0005] Traditionally, the role of wave-dissipating blocks has been considered to be solely to calm waves and protect the coast, but in recent years, it has become recognized that young fish and juvenile fish are growing in the water channels that connect the sea side and the land side, which are formed below the water surface of the wave-dissipating blocks. However, there have been no attempts to utilize this for fishing. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Tokuhei 03-045239 [Non-patent literature]

[0007] [Non-Patent Document 1] Monthly Aquaculture Business January 2022 Issue Special Issue on Searching for New Aquaculture Grounds Summary of the Invention [Problem to be solved by the invention]

[0008] In order to solve these problems, the present invention aims to provide a safe, low-cost natural aquatic life farm and method for raising the survival rate of aquatic life by providing and protecting hiding places for juvenile fish, allowing them to grow by preying on natural organisms, utilizing the natural purification process of water, and growing in the same ecosystem as the surrounding area, which causes no stress to marine life and does not disrupt the environment by escaping, and also aims to provide a rich ecosystem and create fishing grounds over a wide area of ​​the coast by supplying deep seawater to the oligotrophic surface water of the sea.

[0009] The construction of a fish farm in an enclosed area of ​​water to protect and grow the fish in their natural ecosystem. The enclosure has an enclosure that separates the water area, the enclosure has no bottom, the lower edge of the enclosure always abuts on the bottom of the water, the height of the upper edge of the enclosure is higher than the water surface at the highest water level, and a gap is provided in at least one place in the enclosure so that young fish can enter and exit the enclosure but adult fish cannot. The material of the enclosure is formed from any one or a combination of net, wave-dissipating blocks, fishing reef-type reef blocks, concrete, stone, plant material, and metal material.

[0010] A trap is set in the enclosure so that adult fish can enter the inside of the enclosure but cannot get out.

[0011] It is formed by an enclosing section that divides the landward water area into an approximately D-shaped section in plan view, with both longitudinal ends of the offshore wave-dissipating block as the starting and ending points, and a gap section that is formed below the water surface of the offshore wave-dissipating block.

[0012] In a double offshore wave-dissipating block that is installed with a certain space between it and the sea side of the offshore wave-dissipating block, both longitudinal ends of the land-side offshore wave-dissipating block and the sea-side double offshore wave-dissipating block are connected with the material of the enclosing part to form an enclosing part that is approximately rectangular in plan view.

[0013] This is a device that uses tides to raise deep sea water and drain it to the sea surface using a siphon. The height from the inside bottom of the water tank installed on the seabed to the inside top of the water tank is higher than the difference between the height of the water surface at high tide and the height of the water surface at low tide, and the height at which the water tank is installed is such that the inside bottom is approximately the same as the height of the water surface at low tide. The device has an air vent on the top plate of the water tank that allows air inside the water tank to go in and out, a water intake port installed near the inside bottom of the water tank, and a water filter attached to the water intake port. a water intake pipe attached to the tank, one of the opposing ends of the water intake pipe extended to a desired depth in the sea, a check valve provided at the water intake to allow water to flow into the water tank but prevent backflow, a drain outlet provided 1 to 15 cm below the water level of the water tank at high tide during neap tide, a drain pipe inserted into the drain outlet, the end of the drain pipe inside the water tank attached near the inside bottom of the water tank, and the end of the drain pipe outside the water tank attached at approximately the same height as the water level at low tide during spring tide.

[0014] A semi-submersible floating deep-sea water upwelling device that can be towed and has a high degree of freedom in its operating location, comprising a water tank, a float installed in the water tank, mooring lines attached to the water tank, anchors attached to opposing ends of the mooring lines, the water tank semi-submerged in the sea, the anchors installed on the water bottom vertically below, and the mooring lines tautly moored, the water tank's underwater height is such that the inside bottom of the water tank is at approximately the same height as the water level at low tide during spring tide and the inside upper end of the water tank is at a height higher than the water level at high tide during spring tide, a water intake port installed near the inside bottom of the water tank, a water intake pipe attached to the water intake, one opposing end of the water intake pipe extended to a desired depth in the sea, a check valve installed in the water intake to allow water to flow into the water tank but prevent backflow, and a drainage port installed near the front inside bottom of the water tank. The semi-submersible floating deep water upwelling device is comprised of a drainage pipe with one end attached to the outlet, a float attached to the opposite end of the drainage pipe that extends to the sea surface of the desired water area, and a check valve installed in the drainage pipe that allows water to be discharged but prevents backflow.

[0015] This will create a new environment and aquaculture grounds that take advantage of the natural growth potential of living organisms. By utilizing the landward waters of the offshore wave-dissipating blocks, it will become possible to create aquaculture grounds even in areas facing the open ocean. The types and maturation periods of organisms vary, and some of them become bycatch, but this ensures that a natural environment with maintained biodiversity will continue to exist.

[0016] When the young fish grow into adults, they cannot leave the enclosure, but the number of adult fish increases inside the enclosure, making it possible to catch them.

[0017] By setting up traps, adult fish that enter the enclosure cannot escape, and the number of adult fish within the enclosure increases.

[0018] Fishing reef-style reef blocks and bundles of plants are placed inside the enclosure, providing hiding places for young fish and increasing their survival rate.

[0019] The double offshore wave-dissipating blocks on the sea side are deep in water, and by connecting them with the land-side wave-dissipating blocks, a wide and deep enclosure is created. Even if drift sand accumulates in the water area of ​​the land-side wave-dissipating blocks, the sea-side aquaculture facility can continue to operate.

[0020] They feed on organisms that grow on the bottom inside the enclosure, organisms that grow in the water-flowing areas inside the wave-dissipating blocks, and organisms that flow in.

[0021] The water quality is naturally purified. The amount of water flowing in and out of the enclosure is replaced with the amount of water flowing in and out at high and low tides, the water is purified by the waves lapping against the shore, and oxygen enters the water as bubbles are created when waves break on the wave-dissipating blocks. As the enclosure has no bottom, benthic organisms eat leftover food and feces, and seaweed such as eelgrass grows in the shallow areas where sunlight reaches, supplying oxygen.

[0022] No impact on the surrounding ecosystem. Even if the animals escape from the enclosure, it will not affect the surrounding ecosystem because the organisms inside the enclosure are the same as those in the surrounding ecosystem. Also, the organisms inside the enclosure are the same as those in their natural environment, so it is not unreasonable.

[0023] It also becomes easier to turn fishing and aquaculture into a side business. Fishing is safe and low-cost, protected by wave-breaking blocks, fishing can be done even during storms or when fishing is prohibited, work is leveled out, small boats require less fuel, seedlings and bait are not needed because they are naturally occurring, and fishing is efficient if done at low tide.

[0024] They can be used as emergency food for coastal residents. They can be caught with cast nets or dips, making them a natural food source in the event of a disaster.

[0025] The value of the coast will increase. As a seaside biotope, a wide variety of living creatures can be observed from the safety of the shore, and fishing, fishing ponds, and swimming areas can also be created.

[0026] The washed-out sand beach is restored, and the land expands. Wave-dissipating blocks, which were previously only intended to prevent coastal erosion, are now recognized as an investment with expected economic benefits, as they create new fishing grounds and become production facilities that generate wealth. As more wave-dissipating blocks are installed, the number of areas that can capture drift sand increases. As the inside of the enclosed area becomes narrower due to accumulated sand, more rubble and fishing reef blocks are placed on the seaward side, and existing wave-dissipating blocks are reused and moved on top of them, and the enclosed area is also moved, turning the water area on the land side of the existing wave-dissipating blocks into a tidal flat. This process can then be repeated to expand the land.

[0027] By increasing the number of reef blocks, offshore wave-breaking blocks and surrounding areas, it will be possible to prevent boats from running aground, and it will also function as a coastal defense facility for suitable landing sites and to prevent illegal immigration.

[0028] The deep water upwelling device supplies deep water with stable temperatures and nutrients to the nutrient-poor ocean surface, which increases the amount of plankton and seaweed that become food for marine life, promoting their growth and purifying the water. It fertilizes the water, is powerless, and has low running costs. At high tide during spring tides, most of the water tank is submerged, so it does not damage the scenery. If installed inside wave-dissipating blocks, it will not be visible. The semi-submersible floating type can be towed, and the location for water intake and discharge can be freely selected.

[0029] It takes a considerable amount of time for seaweed to grow, but plankton is expected to increase in the short term, so hanging cage cultivation of clams, which feed on plankton and are not fed, can be carried out early.

[0030] Once the young fish have grown to a point where their survival rate is high, the enclosure is opened and they grow into adults along the coast, creating a rich fishing ground. [Brief explanation of the drawings]

[0031] [Figure 1] (a) is a plan view of an enclosure installed in a water area, and (b) is a plan view of a D-shaped enclosure. [Figure 2] (a) is a side view of FIG. 1(a), and (b) is a side view of FIG. 1(b). [Figure 3] This is a plan view of the enclosed area provided in the water area of ​​the double offshore wave dissipating block and the land-side offshore wave dissipating block. [Figure 4] FIG. 4 is a side view of FIG. 3. [Figure 5] (a) is a front view and (b) is a side view of a trap that allows juvenile fish to enter and exit, and allows adult fish to enter but not exit. [Figure 6] (a) is a cross-sectional view of a floating drain valve type of stationary deep-sea water upwelling device, and (b) is a cross-sectional view of a siphon drain type. [Figure 7] This is a cross-sectional view of a semi-submersible floating deep seawater springing device. DETAILED DESCRIPTION OF THE INVENTION

[0032] This will be explained with reference to FIG. 1(a). The construction of an aquaculture facility in an enclosed area 40 that separates the land-side water area of ​​the offshore wave-dissipating block 10 to protect and raise young fish in a natural ecosystem environment, The height of the upper edge 42 of the enclosure 40 is always above the water surface, and the enclosure 40 is formed by a gap 32 provided at at least one place in the enclosure 40, through which the fry 30 can enter and exit the inside of the enclosure 40 but the adult fish 31 cannot. Although not shown in the figure, the surrounding portion 40 has no bottom surface, and the lower edge of the surrounding portion 40 is always in contact with the bottom 15 of the water. Although not shown in the figure, the materials for the enclosure 40 are any one or a combination of netting, wave-dissipating blocks, fishing reef-type reef blocks, concrete, stone, plant materials, and metal materials. The materials and shapes are selected with consideration given to being pollution-free, not affecting living things, and not damaging the scenery as much as possible. In the case of netting, a float is attached to the upper edge, and a weight is attached to the lower edge 43.

[0033] Figure 5 shows a trap 33 installed in at least one location within an enclosure 40, allowing adult fish 31 to enter but not exit. One example of the structure is a square frame with interior dimensions large enough for adult fish 31 to pass through. The longitudinal ends of rods 34 are attached to multiple hinges 36 at the top of the frame to allow them to move freely, and the length of the rods 34 is sized to abut against the bottom end of the frame, so that the bottom end of the frame acts as a stopper 35, allowing the rods 34 to move only inward within the enclosure 40. The rods 34 are spaced apart to leave gaps 32 large enough for fry 30 to pass through. While fry 30 can enter and exit freely, adult fish 31 can push the rods 34 to enter but cannot exit. This gradually increases the number of fish in the enclosure 40.

[0034] One of the longitudinal ends of the offshore wave-dissipating block 10 shown in Figure 1(b) is the starting point, and the opposite end is the end point, and by connecting the starting point and the end point, an enclosed area 40 that is approximately D-shaped in plan view 41 is formed in the landside water area 13. Although not shown in the figure, the water passage formed below the water surface of the offshore wave-dissipating block 10, connecting the seaside water area 14 and the landside water area 13, is inhabited by many young fish 30 and allows them to enter and exit, but adult fish 31 cannot enter and exit, so the water passage is used as a gap 32. Although not shown in the figure, it is preferable that both longitudinal ends of the offshore wave-dissipating blocks 10 are constructed in a U-shaped configuration with both ends facing landward, making the landside water area 13 even calmer and facilitating aquaculture. Because the offshore wave-dissipating blocks 10 are constructed in parallel with gaps between them, the open areas do not absorb waves and waves crash directly against the shoreline 16, causing large amounts of seawater to flow into the landside water area 13 of the offshore wave-dissipating blocks 10 and disrupting the calm. Therefore, if the surrounding portions 40 in contact with both longitudinal ends of the offshore wave-dissipating block 10 are made of sturdy material in a U-shape, the land-side water area 13 will become a suitable place for aquaculture.

[0035] This will be explained using Figure 3. In the double offshore wave-dissipating block 11 that is installed separately in the seaside water area 14 of the offshore wave-dissipating block 10, both longitudinal ends of the land-side offshore wave-dissipating block 10 and the double offshore wave-dissipating block 11 in the seaside water area 14 are connected with the material of the enclosing part 40 to form the enclosing part 40 that is roughly rectangular in plan view. The figure also shows an enclosure 40 extending from the land-side offshore wave-dissipating blocks 10 to the shoreline 16. This creates a wide, deep enclosure 40 in the seaside waters and an enclosure 40 in the shallow waters near the shoreline 16, allowing the cultivation of species of fry 30 that prefer shallow waters and the feeding of benthic organisms. It is expected that aquaculture methods suited to each of the two enclosures 40 will be developed.

[0036] Figure 2(a) is a side view of Figure 1(a), Figure 2(b) is a side view of Figure 1(b), and Figure 4 is a side view of Figure 3, and the lower edge 43 of the enclosing portion 40 abuts the bottom 15 of the water, and the upper edge 42 is above the water surface. Although the enclosed portion 40 is shown in a brick pattern in the figure, it is constructed using the materials shown in paragraph number 0032.

[0037] Although not shown in the figure, if wave-dissipating blocks and fishing reef blocks are installed on the shoreline 16 and furthermore offshore wave-dissipating blocks 10 are installed, By providing an enclosing section 40 from both longitudinal ends of the offshore wave-dissipating block 10 to the shoreline 16, young fish can grow in the gaps 32 below the water surface between both wave-dissipating blocks, and the fish population within the enclosing section will become denser at an early stage.

[0038] Although not shown in the figure, if sedimentation progresses inside 44 of the enclosing part 40 and the amount of water in the landside water area 13 decreases, new offshore wave-dissipating blocks 10 are installed further seaward. In this case, costs can be reduced by reusing and relocating the existing wave-dissipating blocks 10 to the new installation location on a foundation such as rubble or reef blocks. In this case, the enclosing part 40 is also relocated to the new offshore wave-dissipating blocks 10. As a result, the former landside water area 13 becomes a tidal flat and the land expands.

[0039] Although not shown in the figure, examples of the structure of the enclosure 40 include a series of reef-type wave-dissipating blocks, or a fence-like arrangement of bundles of bamboo or brushwood with a float attached near the upper edge 42 and an anchor attached to the lower edge 43 that abuts against the water bottom 15. This increases the number of places for the fry 30 to enter, providing more escape and hiding places and improving the survival rate.

[0040] The inner bottom surface 51 of the water tank 50 installed on the seabed 15 described with reference to Figure 6(a) is set at approximately the same height as the water surface of low tide 21 during neap tide, and the inner top surface 52 of the water tank 50 is set at a height higher than the water surface of high tide 22 during spring tide. A water intake 60 is provided near the inside bottom surface 51 of the water tank 50, one end of a water intake pipe 61 is attached to the water intake 60, the opposite end of the water intake pipe 61 is extended to the desired depth in the sea, and a check valve 62 that allows intake but prevents backflow is provided at the water intake 60. A discharge outlet 70 is provided near the inside bottom surface 51 of the water tank 50, and a float valve 74 is attached to the discharge outlet 70 on the outside of the water tank 50 via a hinge. As the tide rises, the floating valve 74 floats up, closing the outlet 70 with its buoyancy, and deep water is drawn in to the same height as the sea surface, and at high tide the intake stops, maintaining the level of the deep water in the water tank 50. When the tide goes out and the sea level drops below the floating valve 74, the floating valve 74 loses its buoyancy, and the water is discharged to the sea surface. An air vent 54 is provided on the top plate 53 of the water tank 50 to prevent the air in the water tank 50 from becoming pressurized and negatively pressurized due to the intake and discharge of deep water inside.

[0041] This will be explained with reference to Figure 6(b). This is a device that uses tides to raise deep seawater and drains it to the surface of the sea using a siphon 75. a water tank 50 installed on the seabed 15, a height from an inner bottom surface 51 of the water tank 50 to an inner top surface 52 of the water tank 50 being higher than the difference between the water surface height of the spring high tide 22 and the water surface height of the spring low tide 23, and the height at which the water tank 50 is installed is such that the inner bottom surface 51 is approximately the same as the water surface height of the spring low tide 23, and an air vent 54 provided on the top plate 53 of the water tank 50 to allow air inside the water tank 50 to go in and out; The water tank comprises a water intake port 60 provided near the inside bottom surface 51 of the water tank 50, a water intake pipe 61 attached to the water intake port 60, one opposing end of the water intake pipe 61 extended to a desired depth in the sea, a check valve 62 provided at the water intake port 60 to allow water to flow into the water tank 50 but prevent backflow, a drain outlet 70 provided at a position within a range of 1 cm to 15 cm below the water level of the water tank 50 at high tide 20 during neap tide, a drain pipe 71 inserted into the drain outlet 70, an end of the drain pipe 71 inside the water tank 50 attached near the inside bottom surface 51 of the water tank 50 and an end of the drain pipe 71 outside the water tank 50 attached at approximately the same height as the water level of the water tank 50 at low tide 23, and a check valve 72 that allows water to be discharged but prevents seawater from entering the drain pipe 71. Conversely, by not providing the vent 54 or by closing the vent 54, the air pressure increases during the intake of deep water, obstructing the intake and causing the water to leak out of the drain pipe 71, allowing the water to be drained while being drawn in.

[0042] This will be explained with reference to Figure 7. This is a semi-submersible floating deep-sea water upwelling device that allows towing and increases the degree of freedom in the operating location, and includes a water tank 50, a height from the inside bottom surface 51 of the water tank 50 to the inside top surface 52 of the water tank 50 that is higher than the difference in the water surface height at high tide 22 and low tide 23 of the spring tide, an air vent 54 provided on the top surface 53 of the water tank 50 to allow air inside the water tank 50 to enter and exit the water tank 50, a water intake 60 provided near the inside bottom surface 51 of the water tank 50, a water intake pipe 61 attached to the water intake 60, one opposing end of the water intake pipe 61 extended to a desired depth in the sea, and a check valve 62 provided on the water intake 60 to allow water to flow into the water tank 50 but not allow backflow, A drain outlet 70 provided near the inner bottom surface 51 of the water tank 50, and a drain pipe 71 having one end attached to the drain outlet 70; The drainage pipe 71 has an end portion on the opposite side, a floating body 73 attached to the end portion, and a check valve 72 extending to the sea surface of the desired water area and provided on the drainage pipe 71 to allow drainage but prevent backflow. A float 80 provided in the water tank 50, a mooring line 81 attached to the water tank 50, and anchors 82 attached to opposing ends of the mooring line 81; The water tank 50 is semi-submerged in the sea, and an anchor 82 is installed vertically downward. The depth of the semi-submerged water tank 50 is set so that the inner bottom surface 51 is approximately the same as the water surface height of the low tide 23 of the spring tide, and the mooring rope 81 is tensioned and moored.

[0043] The creation of safe, low-cost fishing grounds will contribute to the fishing and wave-breaking block industries. [Explanation of symbols]

[0044] 10 Offshore wave-breaking blocks 11 Double wave-dissipating blocks 12 Both longitudinal ends 13 Landside waters 14 Seaside waters 15 Underwater 16 Shoreline 20 High tide of spring tide 21 Low tide of spring tide 30 fry 31 Adult fish 32 Gap 33 Trap 40 Enclosed section 41 Approximately D-shaped in plan view 42 Top edge 43 Lower edge 44 Inside the enclosure 50 Water Tank 51 Inner bottom surface 52 Inside top edge 60 Water intake 61 Intake pipe 62 Water intake check valve 70 Drain port 71 Drainage pipe 72 Drain check valve 73 Float for drainage pipe 74 Discharge side end 80 Floating structure for water tank 81 Mooring line 82 Anchor

Claims

1. The construction of a fish farm in an enclosed area in a water area to protect and raise young fish in a natural ecosystem environment. The enclosure that separates the water area; There is no bottom surface of the enclosed part, The lower edge of the surrounding portion is always in contact with the bottom of the water; The height of the upper edge of the enclosure is always above the water surface; a gap provided in at least one location of the enclosure, through which the juvenile fish can enter and exit the enclosure but adult fish cannot; The material of the enclosure is a mesh, Wave-dissipating blocks; Fishing reef type reef block, Concrete and Stone and Plant materials and A metal material, Creation of a natural aquaculture site consisting of any one or a combination of the above.

2. a trap set in at least one location of the enclosure that allows the adult fish to enter the interior of the enclosure but not to exit; 2. The construction of a natural aquaculture site according to claim 1, comprising:

3. Both longitudinal ends of the offshore wave-dissipating block; Starting from one of the longitudinal ends, The opposite end is the end point, The enclosing portion connects the starting point and the ending point to divide the landside water area into a generally D-shaped area in a plan view; The gap formed under the water surface of the offshore wave-dissipating block; 3. The construction of a natural aquaculture site according to claim 1 or 2.

4. In the double offshore wave dissipating block installed separately on the sea side of the offshore wave dissipating block, The offshore wave-dissipating block on the land side; The double offshore wave-dissipating blocks on the sea side The two longitudinal ends of the surrounding portion are connected with the material of the surrounding portion to form the surrounding portion having a substantially rectangular shape in plan view.

4. The creation of a natural aquaculture site according to any one of claims 1 to 3.

5. A device that uses tides to raise deep seawater and drain it to the surface of the sea using a siphon. A water tank installed on the seabed, The height from the inner bottom surface of the water tank to the inner top surface of the water tank is set higher than the difference between the height of the water surface at high tide and the height of the water surface at low tide, The height at which the water tank is installed is such that the inner bottom surface is approximately the same as the water level of the low tide of the spring tide, a vent provided on a top plate of the water tank to allow air inside the water tank to enter and exit the tank; a water intake provided near the inner bottom surface of the water tank; A water intake pipe attached to the water intake port, Extending one of the opposing ends of the suction pipe to a desired depth in the sea; a check valve provided at the water intake port to allow water to flow into the water tank but prevent backflow; a drain outlet provided at a position within a range of 1 cm to 15 cm below the water level of the water tank at high tide during neap tide; a drain pipe having one end inserted into the drain outlet; One end of the drain pipe inserted into the water tank is attached to the vicinity of the inner bottom surface of the water tank; The end of the drain pipe outside the water tank is attached at approximately the same height as the water surface at low tide of the spring tide; This is a deep water upwelling device.

6. A semi-submersible floating deep water upwelling device that enables towing and increases the freedom of operation location, A water tank and The height from the inner bottom surface of the water tank to the inner top surface of the water tank is set higher than the difference between the height of the water surface at high tide and the height of the water surface at low tide, a vent provided on a top plate of the water tank through which air in the water tank flows in and out of the water tank; a water intake provided near the inner bottom surface of the water tank; A water intake pipe attached to the water intake port, Extending one of the opposing ends of the suction pipe to a desired depth in the sea; a check valve provided at the water intake port to allow water to flow into the water tank but prevent backflow; a drain outlet provided near the inner bottom surface of the water tank; a drain pipe having one end attached to the drain outlet; Opposite ends of the drainage pipe; a floating body attached to the end thereof; Extending the end to the surface of the desired body of water; a check valve provided in the drainage pipe to allow drainage but prevent backflow; A float provided in the water tank; a mooring line attached to the water tank; Anchors attached to the opposing ends of the mooring lines; The water tank is semi-submerged in the sea, The anchor is placed vertically downward, The depth to which the water tank is semi-submerged is set so that the inner bottom surface is approximately the same as the height of the water surface at low tide of the spring tide, Tension mooring of the mooring lines; A semi-submersible floating deep water upwelling device.

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