KR101361920B1 - Method of composition for shellfish farm - Google Patents

Abstract

 It provides a method for the establishment of a tidal flat farm so that the productivity of the tidal flat, which is a shellfish farm, can be increased by improving the productivity by setting up a boundary stone by forming a boundary stone and forming a dam to prevent the loss of the seed sprayed on the farm. The method of forming a shellfish farm of a tidal flat according to the present invention has an effect of improving productivity by reducing the amount of seedlings lost due to the flow of seawater, compared to a natural spraying shellfish farm, which does not have an existing compartment, and improves productivity and changes in high and low tide. Therefore, the seawater escapes and enters through the waterways, and thus, it is possible to create an eco-friendly shellfish farm by maintaining the natural tidal flats.

Description

Method of Composition of Shellfish Farms in Tidal Flats {Method of composition for shellfish farm}

The shellfish farms in Korea have no efficient design standards, and fish farming deterioration and productivity are being reduced by close feeding. Breaking away from such a conventional tidal flat farm, the present invention divides the tidal flat that becomes a shellfish farm to a certain area to form a boundary stone of a certain height to create a dam, and prevents the loss of seed seed sprayed to the farm to increase productivity. It relates to a method of forming shellfish farms.

The total area of shellfish farms in Korea is 45,352 ha, and as of 2009, the total production of shellfish is about 40,000 tons. Despite the fact that shellfish are limited in the increase in production due to the characteristics of tidal flats, the demand for shellfish continues to increase.

However, in the past 40 years, shellfish farms have not been able to establish proper measures, despite various problems such as loss of seed, wheat, aging of fisheries, loss of productivity, lack of seed and mass death. In addition, there is no efficient design standard for shellfish farms in Korea.

Therefore, in order to activate shellfish production, one of the unique functions of tidal flats, it is necessary to first identify the problems of shellfish farms and to improve the existing shellfish farming structure.

The structure and methods of existing shellfish farms are simply piled at the boundary, spread seedlings, and then grown to adult size depending on nature.

Figure 1 shows the standard design of the pinch presented by the National Fisheries Research and Development Institute, Figure 2 shows the standard design of the clam presented by the National Fisheries Research and Development Institute. Looking at the standard design of the Kokmak and clam farms presented by the National Fisheries Research and Development Institute (see http://portal.nfrdi.re.kr) as shown in Figs. It is made by creating a sign on the shoreline, and spraying and producing shellfish seedlings within the range of the sign. The operation method of shellfish farms is linked to the main causes of various problems such as loss of seed, lost farming, aging of fisheries, productivity loss, lack of species, and mass mortality. Therefore, existing shellfish farms have been improved and designed into a standardized framework. It is necessary to provide a method for continuous mass production of shellfish and to record the entire process from seeding to succession harvesting, and to develop a management guide on shellfish farming operation and distribute it to fishers to contribute to the conservation and productivity of tidal flats. have.

In the case of the standard design of the clam farm, which is installed on the tidal flat, all four squares are made of squares on the tidal flat, and the standard design of the cork is thinner than the bar of the bar in the middle. It is characterized by the fact that the range of shellfish farming is more clearly planted, and there is no improvement to prevent the loss of sown shellfish. The amount of shellfish seedlings required for 1 ha of the conventional standard farm is 3.5 to 7 tons (1 to 1.5 cm long) for spraying, and the estimated production per ha is about 15 tons (3 cm long and 22 to 25 g total weight). This is produced and described in the standard design.

As such, current shellfish farms only define locations for spreading seedlings on tidal-flats, and there is no improvement in the fact that the seedlings sown are lost out of the range sprayed by the flow of seawater.

In Korean Laid-Open Patent Publication No. 10-2011- 0108531 filed by the inventors of the present application, several dogs are arranged at regular intervals along the circumference of the water barrier area, and each of the insertion grooves is vertically extended on the slopes of the pillars. And a conical pointed insertion portion is formed at the bottom of the column portion, and the conical portion and the lower portion of the pillar portion are inserted into the tidal flat so that the edges of each side in the width direction between the plurality of struts and neighboring struts erected to expose the upper portion of the pillar portion over the tidal flat. There is disclosed a mud flat farm fence having a water barrier plate inserted into the insertion groove of the shore, coupled to the shore, and having a lower portion inserted into the tidal flat so that the top is exposed to the top of the tidal flat. The prior art is to improve the proliferation and growth of shellfish and the like inhabiting tidal flats by shortening the exposure time of the tidal flats by storing sea water in the tidal flats exposed during low tide, tidal flats become shellfish farming as in the present invention It is different from the purpose to increase productivity by preventing the loss of seed sprayed on the farm by stacking the boundary stones of a certain height by setting a compartment of a certain area, and the productivity of the banks stacked with boundary stones as in the present invention. The structure has a certain gap, so it is different from the technical configuration, such as the exchange of nutrients according to the flow of sea water, which can supply the tidal flats. In addition, Korean Patent Publication No. 10-0960103 has a plate-shaped support portion formed with a plurality of vertical through holes at regular intervals along the longitudinal direction and the "c" shaped connection assembly extending from the end of the support portion to the outside bending Both front and rear support plates are provided, and both sides of the support plates are coupled to both sides of the front and rear support plates to form a shell propagation space therein, and a plurality of vertical through holes corresponding to the vertical through holes of the front and rear support plates. And, the tidal flats for storing the seawater is inserted into the vertical through-hole fixed to the tidal flat is disclosed. The prior art also is to store the seawater so that phytoplankton or organic matter in the seawater keeps trapped in the tidal flat by preventing the seawater from entering the tide at high tide, taking into account the production of a productive shellfish farm and natural ecological environment for the purpose of the present invention It is different from the technical structure of the loss prevention of shellfish seedlings. As a prior art document relating to the boundary stone proposed in the present invention, Korean Utility Model Registration Publication No. 20-02694260 is designed to have a certain compressive strength and bending strength or more while maintaining an appropriate porosity, so that there is little risk of damage, and the entrance and exit of fish and shellfish is easy. The present invention discloses a porous permeable concrete reef with a large surface area, which can obtain a large shadowing effect, a feed effect, a swirling effect, and an escape effect. However, the prior art shows a difference from the present invention in that it is not intended to make the boundary of the tidal-flat fishing ground, but to drop the fishing grounds to artificially form a fishery fishery to collect fish groups. .

The Marine Fisheries Research Information Portal (http://portal.nfrdi.re.kr) operated by the National Fisheries Research and Development Institute presents standard drawings of farms such as Kokmak and Manila clam, but as discussed in the background technology of the invention. The bar is simply planted as a mark that partitions the tidal flat, and as in the present invention, there is a difference from the configuration of the present invention in which a boundary stone is stacked by partitioning the tidal flat farm and the seed seed sprayed in the partition is not lost.

The shellfish farms in Korea have no efficient design standards, and fish farming deterioration and productivity are being reduced by close feeding. Accordingly, by dividing the tidal flat that becomes a shellfish farm into a certain area and designing it with a standardized framework, the boundary stone of a certain height is piled up at the edge of the partitioned area to create a weir to prevent the loss of seed spray spread on the farm within the partitioned area. Its purpose is to provide a method for the establishment of a shellfish farm on a tidal flat.

In addition, as a boundary stone for stacking banks, there is provided a boundary stone of a form in which a shell made of shell shells or sandstones is stacked on a net, or a form of adhesives made by mixing a sandstone and a polyurethane adhesive in a formwork having a predetermined shape.

According to the present invention, a method for forming a shellfish farm of a tidal flat selects a tidal flat area to be aquaculture, defines a section of a predetermined area on the selected tidal flat, and creates a weir by stacking a perimeter of a predetermined section with a boundary stone of a certain height. The main feature of the construction is the formation of a channel space between the banks of adjacent banks and adjacent compartments, and the establishment of a shellfish farm of tidal flats by stacking boundary stones of constant height in other compartments adjacent to the banks. A water channel space is formed between one or more sections, and a seawater drainage passage is formed in a part of the bank where the boundary stone piled bank and the channel meet to facilitate seawater flow.

In addition, the boundary stone of a certain height may be made of one of a form of a shell made of shell shells or sandstones in the net, or a form of a mixture made of a mixture of sandstone and a polyurethane adhesive in a formwork having a certain shape. , The boundary stone manufactured by mixing the sandstone and the polyurethane adhesive is 45-55cm high trapezoidal cube of upper and lower beams, or a structure of upper and lower beams, which has a trapezoidal cube shape with the center of lateral cross section "U". It may have stability to. The boundary stone prepared by mixing the sandstone and the polyurethane adhesive is placed to face a die of a predetermined height so as to be a light side light; Partitioning the interior of the formed formwork with partition plates; Filling and solidifying the mixed mold with a mixture of sandstone and polyurethane adhesive; The formwork is removed to obtain a boundary stone with a certain height and length.

The tidal flat farm prepared according to the method of forming a shellfish farm according to the present invention has less productivity due to the less amount of seedlings lost due to the flow of seawater than the shellfish farm according to the standard design, which is installed by installing only a mark without an existing compartment. There is an effect to be improved. In addition, it is possible to create an eco-friendly shellfish farm by keeping the tidal flats of the natural environment as the tide and the ebb flow out naturally through the waterways formed as boundary stones.

Figure 1 shows the standard design of the cortex presented by the National Fisheries Research and Development Institute.
Figure 2 shows a standard design of the clam presented by the National Fisheries Research and Development Institute.
Figure 3 is a photograph showing a state of carrying out aquaculture in a typical structure of a tidal flat farm in Korea.
Figure 4 is a photograph showing the type of boundary stone of a certain height stacked on the edge of the partitioned mud flat farm
5 is a photograph showing a state of manufacturing a boundary stone by the formwork.
6 shows the installation of the boundary stone block.
Figure 7 is a photograph showing the waterway formed between the partitioned mud flat farm.
8 shows a panoramic view of shellfish farms formed on the tidal flats.
9 is a photograph showing a state in which shellfish farms formed on a tidal flat is covered with sea water at high tide.

Method for forming a shellfish farm of the tidal flat according to the present invention comprises the steps of defining a section of a predetermined area on the tidal flat; Stacking a boundary stone of a predetermined height on an edge of a predetermined section to create a weir; Forming a waterway space between the banks and the adjacent partitions of the boundary stone formed in the above step is characterized by being formed by partitioning the mud flats by building a boundary stone of a constant height again in the other partition adjacent to the waterway.

In addition, the predetermined height of the boundary stone is one or more of the form of the shell made of shells or sandstones in a net stacked form or a form made by mixing the sandstone and polyurethane adhesive to form a die having a certain shape. You can choose to use it. The boundary stone prepared by mixing the sandstone and polyurethane adhesive is 45 ~ 55cm high trapezoidal cube of upper and lower beams, or a structure of upper and lower beams. The cross section is made into trapezoidal cube shape having a “U” shaped cross section.

In addition, the manufacturing method of the boundary stone is prepared by mixing the sand stone and polyurethane adhesive is a step of placing the two formwork of a certain height to face each other so as to be in the lower side light; Dividing the inside of the formwork arranged in a straight line at predetermined intervals to partition the partition plate; Filling and solidifying the mixed mold with a mixture of sandstone and polyurethane adhesive; And after curing for more than one day can be produced by removing the formwork to obtain a boundary stone having a certain height and length.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1. Defining the block to a certain area on the tidal flat

Figure 3 is a photograph showing the appearance of shellfish farming in the typical structure of the tidal flat farm in Korea. In the case of a conventional clam farm in Korea, as shown in Figure 3 above, the boundary is marked with a pile, and the shellfish culture such as cockle, clam, etc. is performed while maintaining the natural state of the tidal flat without any structure. Therefore, when the seed is spread, it is necessary to spread 20 ton seed per ha in consideration of the natural loss rate, so that the cost of spreading the seed is needed. In order to produce such a shellfish farm as a highly productive farm, it is necessary to select a proper site that can be formed as a tidal farm or to select a tidal farm that is normally managed without any structure and to divide it into a certain area.

The size of the unit area to be partitioned should be partitioned in consideration of the area that is not lost and easy to manage. According to the standard design proposed by the National Fisheries Research and Development Institute, the area is 100m X 100m, but the area is about 1000-1500m ^{2, which} is smaller than 1-2 farmed fishermen to manage and build the boundary stone. It is appropriate to partition the area. However, if the area is jointly managed by the fishing village, or if several fisheries are operated together, it may be divided into a larger area.

2. The step of making a bank by stacking boundary stones of constant height on the edge of the area of the designated compartment.

When the area is set to a fixed area in a tidal farm, a boundary level of constant height is laid at the edge of the area. Figure 4 is a photograph showing a boundary stone of a certain height stacked in the partitioned mud flat farm. The boundary stone of the predetermined height may be a stack made of a shell made of shell shells in the net, or made of a form made by bonding the sandstone and polyurethane adhesive to form a mold having a predetermined shape to have a certain void. Can be. In tidal flat farms adjacent to the areas where shell shells are emitted a lot, it is possible to stack banks by making boundary stones using shells. The boundary stone used according to the location of the bank can also form a boundary bank by mixing one or two types of boundary stones.

Boundary stone made by mixing sandstone and polyurethane adhesive is suitable to be manufactured in the form of a hexahedral cuboid in consideration of the stability of seawater flow, and distribution of seawater and nutrient salts due to sandstone voids when the sea water is high tide. It is advisable to form voids for this purpose. If the porosity is large, the adhesive strength of the sand stone becomes weak, which is not preferable.

There are three types of boundary stones used in the present invention. Sand, sandstone, and oyster shells were collected at the site. Each medium was installed in a permeability coefficient experiment apparatus to measure the time that a certain flow rate passed. The result of calculating the pitcher ratio compared to the time passed is shown in Table 1 below. The permeability coefficient experiment apparatus used in the present invention is a hydrostatic head experiment apparatus having both heights of 2.0 m and 0.8 m, respectively, and has a constant flow from a high head to a low part.

As a result of the experiment, the time passed through each medium installed in the permeability coefficient device was found in the order of empty tube, oyster shell, gravel, and sand, and the permeability ratio for empty tube was 12.8% for sand, 24.8% for gravel, and The value was 37.3%.

This result becomes an essential review element for the maintenance of water level during sedimentation, sedimentation and retrieval before and after the site structure in the design of tidal flats. The oyster shell itself has a high permeability, so the water level seems to be a limiting material, but if it is installed in combination with a porous block or boundary structure, the role of oyster shell for improving the quality could be secured.

In addition, the manufacturing method of the boundary stone for bonding and manufacturing the adhesive stone and polyurethane by mixing the adhesive step of placing two formwork of a certain height to face each other so as to be a light side light; Dividing the inside of the formwork arranged in a straight line with a partition plate according to the length of the boundary stone; Mixing the sandstone and the polyurethane adhesive in the partitioned formwork to fill and form the mixed material in the formwork; And by removing the formwork can be produced by the method of the step of obtaining a boundary stone having a certain height and length. 5 is a photograph showing a state in which the boundary stone is produced by the formwork.

To facilitate the transport of the boundary stones from the test gun, a thick cloth was wrapped around the bottom of the boundary stone and the boundary stones were tied with a rope to make it easier for people to carry with the iron rods. In order to transport the boundary stone to the test shell of the clam farm, it was transported to the test cloth by boat at high tide, and the boundary stone was dropped by marking the boundary stone drop point with bamboo with flag at low tide.

Pitching Experiment Results of Low-Quality Medium medium Transit time (sec) Flow rate (m3 / sec) Flow rate ratio (/ guest house) Empty building 2.5 0.00760 1.00000 sand 19.5 0.00097 0.12821 Pebble 10.1 0.00188 0.24752 Oyster shell 6.7 0.00284 0.37313

The installation of the boundary stone was made by putting the iron rod on the rope tied to the boundary stone at low tide, and people carrying the boundary stone installed the test cloth. The test fabric was completed by constructing a boundary stone with the boundary stone height 45-55㎝ after the safety evaluation of the structure.

If the height of the boundary banks is not formed in the part of the boundary banks, the depth of about 30cm is maintained during low tide to induce the production of phytoplankton by photosynthesis, so that the low-quality shellfish can feed. Considering the height, 45-55cm is suitable. Therefore, when stacking the nets made of shell shells in the net, stack the 2-5 nets to match the height, or in the case of the boundary stone for adhesive manufacturing by mixing the sandstone and the polyurethane with adhesive, the designed height is 45-55cm The height of the weir can be formed by setting to.

3. Hydraulic Model Test of Boundary Stone

The hydraulic model test of the boundary stone was carried out in a two-dimensional wave channel located at the Marine Repair Laboratory of Pukyong National University, and the cross-sectional test was carried out in a channel 1.0 m wide, 1.0 m high and 35 m long. Electric servo piston type sowing machine is installed in the sectional channel and can make regular wave and irregular wave.

In order to effectively control the reflection and reflection caused by the wave plate caused by the installation of the structure, the channel channel was divided into 1.0 m channel width and 0.5 m width and 0.5 m width. In the dividing channel, the cross-sectional model was installed in the channel of 0.5m in front width to acquire all the data, and the incident wave was set and corrected in the channel of 0.5m in the rear width. Sectional channel is installed to continuously change the cycle and crest, and the 25m section of the front center is treated with tempered glass so that the experimental scene can be easily observed.

In addition, the capacitive crest meter is attached to the front of the waveplate to allow reflection absorption control based on the data read from the crest meter, and sofa devices formed of multiple layers of porous structures are installed at both ends of the channel.

The sowing machine used in the experiment of the present invention can input and wave random spectral values for each component wave by the spectral function, and connects the crest meter, the manometer and the flowmeter to simultaneously store 32 channels of data. You can get it.

In case of installation of water inside the channel, the difference between the surface of water before and after the body can be occurred by the wave and the penetrating wave.The difference in water level is the pipe before and after the body through the rear channel of 0.5m width and the pipe connected to both ends of the channel. The level of is kept the same. Table 2 summarizes the specifications and functions of the cross-section channel used in this cross-sectional hydraulic model test.

Section channel and sowing machine characteristics division Experimental facilities and equipment Remarks Waterway 35m (L) ㅧ 1.0m (W) ㅧ 1.0m (H) Sowing machine
Performance Harmonic plate size 1.0m (W) ㅧ 1.0m (H) Maximum crest 0.25 Reproduction cycle 0.5 sec to 2.5 sec Depth 0.8 m Driving method Electric servo piston type

1) Scale and Fabrication of Models

At the bottom of the tank, the floor was installed using the day after tomorrow, considering the local representative slope. There is a certain depth section of about 8 m horizontally from the front side of the wave plate to the start of the model depth, in order to allow the distance generated by the wave generator to propagate a certain depth. Sophisticated work was carried out considering the current situation in model making and considering the reproducibility of the boss as much as possible.

2) scale and similarity

The scale and production of the model are selected by considering the scale and performance of the purpose of the experiment, the experimental tank, the experimental facility, and the experimental equipment, but most importantly, the hydraulic phenomenon in the prototype is best reproduced in the model according to the purpose of the experiment. It should be possible.

In the experiment of the present invention, the normal model with the vertical and horizontal scales of 1:10 is used in consideration of the depth, tide, sea slope, design wave, floor height of the structure, modeling area, and the size of the experimental tank. It was. The model is made by reducing the prototype by applying the Froude similar law.

In order to apply the results of the model experiment to the prototype, a hydraulic similarity must be established between the model and the prototype, and the mathematical similarity rule defines the conversion rate when applying the physical quantities measured in the model experiment to the prototype.

It can be said that it is virtually impossible to achieve perfect similarity in prototypes and models, and it is common to consider only one dominant force because in practice, one or several component forces are often not acting or are small enough to be ignored. to be.

External forces applied to the fluid include pressure, gravity, viscous force, surface tension, and elastic force.If the main external force acting on the fluid is gravity, Froude's law applies. If viscous force dominates the flow, Reynolds' law applies. Apply.

Since hydraulic model tests involving offshore structures are wave tests with free surface, gravity dominates the motion of the fluid. Therefore, the similarity between the model and the prototype is governed by the Froude similarity, and all factors are reduced by the Froude similarity.

The model block was manufactured under the condition of porosity 0.5 using sandstone particles to reproduce the structure of the site, and the experimental tide applied to the hydraulic model test applied a depth of 0.3 m ~ 4.4 m.

The porous block in the shape of the upper and lower light beams used in this experiment has a trapezoidal shape having a lower width of 3.0 cm, an upper width of 2.0 cm, and a height of 5.0 cm, scaled at 1:10 (Fig. 6). The width of the structure is 5.0 cm. In addition, an improved porous block was used in a trapezoidal hexahedron shape having a U-shaped side cross section with a trapezoidal shape having a lower width of 5.0 cm and an upper width of 3.0 cm and a height of 5.0 cm at 1:10 scale. Lower figure>. Unlike conventional porous blocks, there is a groove from the top to the top of the structure and the width of the structure is 5.0 cm.

Experimental blue conditions were performed for waves with the same period of 6 sec normal and 3.5 sec deep design wave. The wave conditions used in the experiment are as follows.

Experiment Blue Experimental wave

section Blue Blue h
(m) T1 / 3
(sec) H1 / 3
(m) h
(cm) T1 / 3
(sec) H1 / 3
(cm) Porous block 0.3 3.5 0.12 3.0 1.11 1.2 0.13 1.3 0.14 1.4 0.15 1.5 0.16 1.6 0.17 1.7 6.0 0.14 1.90 1.4 0.15 1.5 0.17 1.7 0.18 1.8 0.19 1.9 0.23 2.3 1.8 3.5 0.1 18.0 1.11 One 0.2 2 0.31 3.1 0.42 4.2 0.52 5.2 0.63 6.3 6.0 0.22 1.90 2.2 0.3 3 0.39 3.9 0.48 4.8 0.57 5.7 0.66 6.6

Experiment Blue Experimental wave

section Blue Blue h
(m) T1 / 3
(sec) H1 / 3
(m) h
(cm) T1 / 3
(sec) H1 / 3
(cm) Porous block 3.33 3.5 0.25 33.3 1.11 2.5 0.37 3.7 0.47 4.7 0.62 6.2 0.71 7.1 0.77 7.7 6.0 0.38 1.90 3.8 0.47 4.7 0.54 5.4 0.65 6.5 0.75 7.5 0.95 9.5 4.8 3.5 0.28 48.0 1.11 2.8 0.37 3.7 0.51 5.1 0.62 6.2 0.7 7 0.78 7.8 6.0 0.35 1.90 3.5 0.45 4.5 0.55 5.5 0.66 6.6 0.77 7.7 0.96 9.6

3) Experimental results

A) Experimental results of commercial co-optic porous block

Experimental results showed that the stability of the superbly-blow porous block was stable in the range of 0.12 m to 0.17 m when the period was 3.5 sec under the condition of 0.3 m depth, and 0.14 m to 0.19 when the period was 6.0 sec. It was found to be stable in the range of m and was unstable at a crest of 0.23 m.

When the period was 3.5 sec under the condition of 1.8 m, the crest was found to be stable in the range of 0.1 m to 0.42 m and unstable when the crest was 0.52 m or more. In addition, when the period was 6.0 sec, the crest was found to be stable in the range of 0.22 m to 0.39 m, and it was unstable when the crest was above 0.48 m.

When the period was 3.5 sec at the depth of 3.33 m, the wave height was stable in the range of 0.25 m to 0.62 m. The fluctuation occurred at the wave height of 0.71 m, and unstable at the height of 0.77 m. When the period was 6.0 sec, it was found that the crest was stable in the range of 0.38 m to 0.54 m, fluctuations occurred at the crest height of 0.65 m, and unstable at the crest higher than 0.75 m.

When the period was 3.5 sec at the depth of 4.8 m, the wave height was stable in the range of 0.28 m to 0.62 m, the fluctuation occurred at the wave height of 0.70 m, and unstable at the height above 0.78 m. When the period was 6.0 sec, it was found that the crest was stable in the range of 0.35 m to 0.55 m, fluctuations occurred at the crest height of 0.66 m, and unstable at the crest height of 0.77 m or more. The above results are shown in a table as follows.

Experimental Results of Porous Blocks Experimental wave

section Blue Experiment result h
(m) T1 / 3
(sec) H1 / 3
(m) stability Bottom change existing
Porous block 0.3 3.5 0.12 stability 0.13 stability 0.14 stability 0.15 stability 0.16 stability 0.17 stability 6.0 0.14 stability 0.15 stability 0.17 stability 0.18 stability 0.19 stability 0.23 Instability (conduction) 1.8 3.5 0.1 stability 0.2 stability 0.31 stability 0.42 stability 0.52 Instability (conduction) 0.63 Instability (conduction) 6.0 0.22 stability 0.3 stability 0.39 stability 0.48 Instability (conduction) 0.57 Instability (conduction) 0.66 Instability (conduction)

Experimental Results of Porous Blocks Experimental wave

section Blue Experiment result h
(m) T1 / 3
(sec) H1 / 3
(m) stability Bottom change existing
Porous block 3.33 3.5 0.25 stability 0.37 stability 0.47 stability 0.62 stability 0.71 Instability (shake) 0.77 Instability (conduction) 6.0 0.38 stability 0.47 stability 0.54 stability 0.65 Instability (shake) 0.75 Instability (conduction) 0.95 Instability (conduction) 4.8 3.5 0.28 stability 0.37 stability 0.51 stability 0.62 stability 0.7 Instability (shake) 0.78 Instability (conduction) 6.0 0.35 stability 0.45 stability 0.55 stability 0.66 Instability (shake) 0.77 Instability (conduction) 0.96 Instability (conduction)

B) Experimental results of improved porous blocks

The stability of the porous block was found to be stable in all experimental ranges at 3.5 sec and 6.0 sec at depths of 0.3 m to 4.8 m.

Improved Porous Block Experiment Experimental wave

section Blue Experiment result h
(m) T1 / 3
(sec) H1 / 3
(m) stability Improving
Porous block 0.3 3.5 0.12 stability 0.13 stability 0.14 stability 0.15 stability 0.16 stability 0.17 stability 6.0 0.14 stability 0.15 stability 0.17 stability 0.18 stability 0.19 stability 0.23 stability 1.8 3.5 0.1 stability 0.2 stability 0.31 stability 0.42 stability 0.52 - 0.63 - 6.0 0.22 stability 0.3 stability 0.39 stability 0.48 stability 0.57 - 0.66 -

Improved Porous Block Experiment Experimental wave

section Blue Experiment result h
(m) T1 / 3
(sec) H1 / 3
(m) stability existing
Porous block 3.33 3.5 0.25 stability 0.37 stability 0.47 stability 0.62 stability 0.71 stability 0.77 stability 6.0 0.38 stability 0.47 stability 0.54 stability 0.65 stability 0.75 stability 0.95 stability 4.8 3.5 0.28 stability 0.37 stability 0.51 stability 0.62 stability 0.7 stability 0.78 stability 6.0 0.35 stability 0.45 stability 0.55 stability 0.66 stability 0.77 stability 0.96 stability

4. A channel space is formed between the embankment of the boundary stone and the adjacent partition, and the tidal flat is partitioned by building a boundary stone of a constant height in the adjacent partition.

If you define a compartment on a tidal flat farm and form a bank by laying a boundary stone of a certain height on the edge of the farm, the seed sprayed inside the farm is seawater, so even if you enter the farm, the boundary stone bank becomes an obstacle and is almost impossible to move. There are few seeds that are lost to the farms until they are harvested.

However, in order to create the flow of the seawater into an environment such as a tidal flat in an unspecified state, it is necessary to make a waterway around the boundary stone so that the seawater can smoothly escape when it is picked up. Figure 7 is a photograph showing the waterway formed between the partitioned mud flat farm. The channel around the boundary stone can take the place of a channel for fishers to come and go to their tidal farms after the sea is drained. Since the seed is growing inside the partitioned tidal farms, it is not desirable for fishers to travel to and from the farms for work.

The channel can be formed between the banks on which the boundary stones are stacked and the partitions on one side adjacent to each other, and it is also possible to form a channel space around the entire area of the tidal flat farm in a predetermined area. The conditions to be considered when installing waterways may be to form a channel at the boundary line in a straight line from the sea to the land in consideration of the flow of seawater, and to connect the water channel to a part of the bank consisting of a boundary stone adjacent to the channel. It is also possible to provide passages. That is, a waterway space is formed between the boundary stones and the adjacent one or more sections, and the seawater drainage passage is formed in a portion of the boundary stone embankment where the boundary stones accumulate and the channel meets, so that the seawater flows smoothly at high and low tide. 8 is a view of the shellfish farms formed on the tidal flat, Figure 9 is a photograph showing a state in which shellfish farms formed on the tidal flat is covered with sea water.

According to the present invention, the tidal flat farms prepared according to the method of forming a shellfish farm according to the present invention have less productivity than the shellfish farm according to the conventional spraying method, resulting in less productivity of the seedlings lost due to the flow of seawater, thereby improving the changes of the tide and the low tide. According to this, the flow of seawater is naturally flowed through the waterway, so it is possible to maintain the environment of tidal-flat conditions and to create and maintain an eco-friendly shellfish farm.

Claims (5)

A) defining a predetermined area of area on the tidal flat;
B) Stacked meshes made of shell shells or sandstones in the net at the edges of the designated compartments, or boundary stones made of a mixture of sandstones and polyurethane adhesives, 45-55 cm high and low trapezoidal cubes or upper and lower Stacking at least one selected from among trapezoidal cubes having a “U” shape at the center of the side surface as a structure of light to form a weir;
C) forming a waterway space between the at least one partition adjacent to the bank on which the boundary stone is stacked, and forming a seawater drainage passage connected to the channel at a portion of the bank on which the boundary stone is adjacent to the waterway;
D) Method of forming a shellfish farm of a tidal flat, characterized in that the boundary stones of a certain height is stacked in other compartments adjacent to the waterway adjacent to the waterway and divided into tidal flats to form a dam.
The boundary stone according to claim 1, wherein the boundary stone produced by mixing and mixing the sandstone and the polyurethane adhesive is
A) arranging the formwork of a certain height to face the upper and lower light;
B) partitioning the interior of the formed formwork with partition plates;
C) filling and solidifying the mixed form of sandstone and polyurethane adhesive into the partitioned formwork;
D) a method of forming a shellfish farm of a mudflat, characterized by removing the formwork and obtaining a boundary stone having a certain height and length; delete delete delete

Images