KR101699877B1 - System for salt removal of earth in the designated district of reclaimed land with desalinated water supply and method for de-salt using the system - Google Patents

Abstract

The present invention relates to a salt removal system and method with respect to a partial target district designated from reclaimed land, comprising: an outer drainage channel configured to sequentially dig soil along an edge of a target district from entire land of reclaimed land such that sea water remaining in strata of the reclaimed land is leaked under the target district and stagnated; water intake land connected to the outer drainage channel, and allowing the sea water of the outer drainage channel to be collected thereto so as to supply raw water to desalination facility; flat mud solum mounted to a suitable height by using flat mud, which is dug for forming the outer drainage channel and the water intake land connected thereto, as soil resource of the target district in the state of having enlarged pores; a capillary phenomenon prevention layer of the sea water, formed by gravel stratum and a fabric layer on the top of the reclaimed land before mounting the soil; and sea water desalination facility for inducing that the sea water remaining in the strata of the target district is leaked through the outer drainage channel and an underground sea water level of the target district is lowered, and generating fresh water through the desalination facility by using the sea water stagnated in the water intake land and the outer drainage channel so as to supply the fresh water for a method of removing salt from the flat mud solum. The present invention, unlike a conventional technique, removes salt from only the target district from entire target reclaimed land to enable only a designated section of the reclaimed land to be used for an industrial purpose, thereby maximizing availability of the reclaimed land.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desalination system and a decontamination method for a designated area of a reclaimed land. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desalination system,

The present invention relates to a decontamination system for reclaimed land, and more particularly, to decontaminate soils of a specified target site of a designated compartment to be used industrially in the entire reclaimed land, Of the reclaimed land in order to solve the disadvantage that the recycling period of the long-term, open land of the user of the cleared land is long, and the recovery period of the investment cost is long, And a decontamination method.

In the case of reclaimed land in Korea, it reached 146,726 km in 1991 (about 1,467 km2), and the salt in the soil has been a major obstacle to plant growth. In addition, the planned use of tidal flat land that was revealed due to the construction of the Saemangeum dike in 2008 is planned for various facilities such as agricultural land, industrial land, tourism leisure, residence, environment green area among 282.9㎢.

However, the actual salt concentration of the reclaimed land is 0.33 ~ 1.15%, and the salinity of the freshwater lake in the reclaimed land is 0.35%.

So, because the reclaimed land has a high salinity, soil decontamination process is needed.

However, the limit for the growth of crops and trees is generally known to be less than 0.3% in soil salt concentration. Although there are plants and weak plants that are resistant to saltiness depending on the type of crops and trees, it is known that soils with a salt concentration of 0.1-0.3% can be grown slowly although they are known so far.

Especially, in drought, it is known that the underground seawater including the saline coming from the deep sea rises to the surface due to the capillary phenomenon, and thus causes the osmotic action which absorbs the moisture from the root, thereby causing death due to the salt stress.

Japanese Patent Publication No. 10-899019 (May 15, 2009) discloses a suction drain decontamination apparatus and a construction method in reclaimed land.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

There is a limit in the conventional reclaimed land decontamination system that uses the fresh water around the existing reclaimed land as it is. In addition, in the case of the soil-based soil for decontamination of reclaimed land, it is necessary to collect soil from the inland for transporting the soil, so that not only a huge amount of cargo is generated, but also the incidental problems such as natural destruction It takes ten years or more to construct the paper so that the whole reclaimed land can be used industrially, and the external soil procurement is delayed due to the environmental destruction controversy. A consumer who wishes to use the land industrially by designating a specific location can not wait for a long time until the entire site of the reclaimed land can be used after the completion of the construction of the external soil and the industrial land, I can not.

Therefore, there is a need for a method to develop the paper according to the demand of the paper composition in order to utilize the target site and area from the desired position.

In particular, the paper composition and desalination of the entire site of the reclaimed land, and the paper composition and desalination of the target site are distinguished. In the case of the site composition of the premise site, the external soil is formed over a long period of time under the influence of the underground seawater and corresponds to the underground sea level. However, when underground seawater is completed underground, it is responding by recovering the damage if underground seawater rises and damage occurs. However, in the case of land reclamation, only reclamation site is limited to a specific target site. In the case of reclamation, seawater flows in or near the bottom of the land in the entire reclaimed land. Therefore, And it becomes contaminated with salt. The entire reclaimed land is sinking like seawater in a sponge, and seawater penetrates into the soil of the outer soil on a specific site. In addition, even if the tidal flats are to be buried in a specific target site, it is difficult to remove the salt in the tidal flat soil layer because the sea water is faded. Even if the fresh water is slowly removed and the salt is removed slowly, the sea water is constantly rising to the capillary phenomenon. Reduce contamination of soils. Thus, it is not maintained in the normal soil condition even after conversion to the soil of the outer soil or the normal soil of the inner tidal flat embankment for some specific target sites among the entire site of the reclaimed land condition.

Therefore, a method and system for improving it are required.

The present invention has been made in order to solve the problems that it is difficult to efficiently remove the salinity and soil of a specific target site by external capillary soil due to the capillary phenomenon of underground seawater as described above, It is possible to clear the designated target site in the reclaimed land by forming the outer drainage path along the edge of the paper to lower the water level of the underground seawater of the specified target site and to perform the decontamination treatment in accordance with the current development method, It is an object of the present invention to provide a decontamination system and a decontamination method for a designated target area of a reclaimed land in order to make it possible to utilize some target paper in a short period of time as requested by a consumer.

In order to form an outer drainage path, the present invention is a tidal-flat soil dredged from excavated tidal-flat soil excavated from a reclaimed land, excavation of resin to be described later, and underground seawater, And the transportation distance of the reclaimed land of the tidal-flat soil and the transportation distance of the embankment resource is 2 ~ 3 km, compared with the distance of 20 km or more of the transportation of the external soil and the embankment resource, and avoids the controversy about the destruction of the natural environment for the extraction of the external soil . It is an object of the present invention to provide a decontamination system and a decontamination method for a designated part of reclaimed land for promoting penetration of fresh water due to breakage of natural tidal flat soil during excavation, dredging, and transportation.

In addition, the present invention forms an outer drainage path and surrounds the target paper among the reclaimed land, and when the depth of the outer drainage is about 4m, the underground seawater having the underground seawater level of -0.5m ~ The sea water from the outer drainage flows to the drainage line connected to the outer drainage line and when the underground seawater is used or drained to another place such as the sea, the underground sea water level of the target sheet is lowered to about 2m, , A desalination system and a decontamination method for a designated designated land among the reclaimed land where the underground sea level of the target paper is to be lowered, and the seawater desalination plant needs to acquire the necessary intake resources.

In addition, the present invention produces fresh water from seawater desalination facilities by flowing seawater into the drainage pond in the drainage channel of the outskirts, and supplies it to the soil desalination method applied to the target paper, ) To a normal soil level, and to provide a decontamination system and a decontamination method for a designated target paper among the reclaimed land.

The decontamination system for a designated part of the reclaimed land according to the present invention is characterized in that the decontamination system for the specified part of the reclaimed land continuously dug the soil along the edge of the object land among the whole land of the reclaimed land, and seawater existing in the soil layer of the reclaimed land flows out A perimeter drain to make it high; A tributary of the tidal flats so as to be deeper than the depth of the outer drainage and wider than the width of the outer drainage at one place of the outer drainage; Forming a gravel layer on the ground surface of the target paper, forming a capillary phenomenon preventing layer which permeates water thereon and covers the fabric layer that filters the tidal soil and sand; A tidal flat filler layer which is used as embankment resources of the target site in a state where the paved tidal flats are paved to form a puddle connected to the outer puddle along the outer puddle, And seawater existing in the stratum of the target paper flows out to the outer drainage to guide the underground sea level of the target paper to be lowered, and the seawater pumped into the seawater and the outer drainage channel is desalinated and supplied to the tideland Includes seawater desalination facilities to remove salt.

The capillary phenomenon prevention layer includes a gravel layer formed on the surface of the target paper to prevent seawater from rising to the ground surface due to capillary phenomenon inside the target paper.

The capillary phenomenon prevention layer includes a fabric layer provided on the gravel layer and capable of permeating fresh water to prevent the gravel layer from flowing into the gravel layer and thereby reducing voids.

A method for decontaminating a designated part of reclaimed land according to the present invention is characterized in that: an outflow drainage path continuously discharging the soil along the edge of the target sheet of the reclaimed land is formed so that the seawater existing in the target sheet A step of forming an outer rim to be formed; Forming a tidal flat so that the depth of the tidal flats is greater than the depth of the outer trough and the width of the outer trough is wider than the width of the outer trough; Flooding and drainage of a tidal flat soil layer, which is utilized as embankment resources of the target paper in a state in which pores are enlarged through dredging, transportation, getting off, and embankment processing by dug up tidal flats in order to form the outer drainage path and water intake paper; And a seawater desalination unit installed near the outer drainage channel and the outer drainage channel so as to allow decontamination treatment of the target paper while introducing seawater existing in the stratum of the target paper into the outer drainage channel, And supplying fresh water to the tidal flat soil layer to perform desalination treatment.

As described above, the decontamination system and the decontamination method for a designated part of the reclaimed land according to the present invention can remove the reclaimed land by forming an outer drainage path along the edge of the target paper, The utilization of the reclaimed land can be promoted.

The present invention relates to a tidal-flat soil excavated from a reclaimed land to form an outer drainage path, excavation of the reclaimed resin to be described next, and tidal-flat soil dredged underground seawater, And it is possible to reduce the distance of transportation from 20km to 2 ~ 3km and to avoid controversy about the destruction of natural environment for the extraction of external soil through the embankment of reclaimed land of tidal flat soil. , The tidal flat soil in the natural state is broken in the transportation process and the pore is developed, so that the penetration of the fresh water can be promoted.

In addition, the present invention forms an outer drainage path and surrounds the target paper among the reclaimed land, and when the depth of the outer drainage is about 4m, the underground seawater having the underground seawater level of -0.5m ~ And the seawater discharged from the outer drainage flows to the water intake connected to the outer drainage line. When the underground seawater is used as the raw water for producing freshwater in the desalination plant or drained to another place such as the sea, the water level of the underground seawater is lowered to about 2m It is possible to acquire the necessary water resources for seawater desalination facilities, securing the tidal flat embankment resources, lowering the underground water level of the target land, and so on.

In addition, the present invention produces fresh water from seawater desalination facilities by flowing seawater into the drainage pond in the drainage channel of the outskirts, and supplies it to the soil desalination method applied to the target paper, ) To the normal soil level.

In addition, the tidal flats excavated and dredged the outer drainage and drainage piles are broken in the process of transporting and getting off to cover the target paper, and the pores are developed. When the soil is drained by the salt removal method after the embankment, the penetration into the tidal flats is promoted Salinity removal is promoted and drainage time can be shortened.

In addition, the effect of forming the outer drainage channel along the edge of the target paper is due to the fact that the underground seawater accumulated in the reclaimed land rises in accordance with the capillary phenomenon of the outer soil tideland clayey soil layer and the decontaminated tideland clayey soil layer, This is to prevent the phenomenon that contamination and deterioration are impeded even during the decontamination proceeding. The soil excavated in order to form a drainage channel can be used as embankment resources, and the seawater flowing into the outer drainage channel can be collected by an intake paper, and the seawater of the seawater can be used for the purpose of producing indispensable fresh water for soil salinity removal. It can be used as raw water to produce fresh water in a desalination facility installed on the resin site.

In the present invention, the tidal flats excavated and dredged the outer drainage canals and the drainage troughs are broken in the process of transporting and getting off the ground to fill the target paper, and the pores are developed. When the fresh water is filled in accordance with the soil salt removal method after the embankment, The salt removal can be promoted and the drainage time can be shortened.

1 is a plan view showing a schematic configuration of a decontamination system for a designated part of a reclaimed land according to a first embodiment of the present invention.
FIG. 2 is a sectional view showing a schematic configuration of a decontamination system for a designated part of a reclaimed land according to a first embodiment of the present invention.
3 is a cross-sectional view showing a schematic configuration of a decontamination system for a designated part of a reclaimed land according to a second embodiment of the present invention.
4 is a cross-sectional view showing a schematic configuration of a decontamination system for a designated part of a reclaimed land according to a third embodiment of the present invention.
5 is a flowchart showing a decontamination method for a designated part of the reclaimed land according to the first embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a decontamination system and a decontamination method for a designated part of reclaimed paper according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a plan view showing a schematic configuration of a decontamination system for a designated part of reclaimed paper according to a first embodiment of the present invention, Sectional view showing a schematic configuration of a decontamination system for a CO.

1 and 2, a decontamination system for a part of the ground of the reclaimed land 10 according to the first embodiment of the present invention includes an outer drainage path 100, a tidal flat soil layer 200, a seawater desalination plant 300, And resin (400).

Particularly, the decontamination system according to the present invention is characterized by decontaminating the target paper 30 among all the land of the reclaimed paper 10 where seawater is prevented from flowing due to the construction of the seawater 20.

At this time, the seawater 20 is formed at the boundary between the sea and the reclaimed land 10 so that seawater does not flow for reclamation. That is, the effect of reducing the inflow of seawater into the ground layer 12 in the land surface of the reclaimed land is caused in the reclaimed land 10.

Originally, the reclaimed land 10 is flooded or flowed into the stratum 12. In particular, the reclaimed land 10 has seawater in the ground layer 12 and a small amount of pores. As a result, the seawater rises due to the capillary phenomenon, so that the freshwater on the ground surface can not easily penetrate into the lower part.

Accordingly, the decontamination system according to the present invention includes the outer drainage channel 100 and the tidal flat soil layer 200.

The outer drainage path 100 continuously drains the soil along the edge of the target paper 30 among the entire grounds of the reclaimed paper 10 to allow seawater existing in the ground layer 12 of the reclaimed paper 10 to flow out It plays a role. At this time, the width and depth of the outer drainage passage 100 can be set according to the amount of seawater to be raised. The outer drainage path 100 is formed continuously along the edge of the target sheet 30.

The tidal flats 200 are formed by filling the target paper 30 with the dredged soil dug out of the excavated soil and sea water to form the outer drainage path 100 and the wasted resin 400. Thus, the tideland-covered filler layer 200 formed on the target paper 30 is formed higher than the reclaimed paper 10.

The excavated soil may be used as embankment resources to form the outer drainage path 100 and the seawater flowing into the outer drainage path 100 may be collected by the seawater 400, For the purpose of producing indispensable fresh water for the desalination process, it is used as raw water for producing fresh water in a seawater desalination plant (300) installed at a site adjacent to the reclaimed resin (400).

An excavator is moved from the reclaimed paper 10 or the target paper 30 according to the location of the outer drainage path 100 and the reclaimed resin 400 to plow the soil and fill the target paper 30. When seawater accumulates in the waste resin (400) due to excavation, the bottom of the waste resin is dredged with a dredging pump to cover the object paper (30). In this way, the method of embedding the inner tidal flats reduces the transportation cost of the embankment resources compared with the existing method of embedding the target paper 30 with the outer soil.

In addition, the tidal flat soil layer 200 has a void space that is larger than the original soil of the reclaimed land 10 through the process of laying, transporting, getting off, and filling the digging excavated soil to form the outer drainage path 100 and the reclaimed resin 400 And the drainage of seawater and fresh water becomes smooth.

On the other hand, in the outer drainage channel 100, the seawater of the high-tide layer 12 is collected by the wastewater 400 and used as a fresh water raw material. A seawater desalination apparatus 300 is provided on the target paper 30 or the reclaimed paper 10 adjacent to the reclaimed resin 400.

Although not shown, the tidal-floor embankment layer 200 may have a trough to which fresh water can be confined, and a drain tank may be provided for each divided setting area. Particularly, the drainage tank can exemplify a cylindrical shape, and the size and shape can be variously applied. The upper part is protruded above the tidal flat soil layer 200, the upper end is open and the middle part is vertically buried in the tidal flat soil layer 200 And is placed on the gravel layer or coalesced fiber.

In addition, the seawater desalination facility 300 is suitable for reverse osmosis and various desalination facilities are possible. In addition, the desalination plant 300 has a supply pipe 310. When fresh water is filled into the tidal flat soil layer (200) between the drainage trough and drainage trough, the fresh water seeps into the tidal flat soils and drains into the gravel layer. The water is drained into the drainage trough, Of the reclaimed land.

If the water in the drainage tank becomes hot, pour the saline solution water through the pump and drain it to the intake pipe. When the fresh water of the surface is almost permeated, the salty water of the tidal flat filler layer 200 reaches the normal soil (salinity 0.08%) by repeating 5 to 6 times by filling the fresh water again.

At this time, the seawater desalination apparatus 300 may be provided in various locations (areas) such as the reclaimed land 10, but is provided in the tidal flat embankment layer 200 for convenience.

If a specific site is extensive, a channel may be installed in the compartment where the salt is already removed, and a waterway may be made as a canal. In this case, a temporary water line may be opened to supply fresh water to the compartments undergoing decontamination by a nearby soil decontamination method. Here, the catching film can be applied variously such as a plastic film.

In this manner, the target sheet 30 is stepwise removed by each compartment, thereby converting the entire tideland embankment layer 200 of the target sheet 30 to the salinity of the normal soil level.

 3 is a cross-sectional view showing a schematic configuration of a decontamination system for a designated part of a reclaimed land according to a second embodiment of the present invention.

3, the decontamination system for a part of the ground of the reclaimed land 10 according to the second embodiment of the present invention includes an outer drainage path 100, a tidal flat soil layer 200, a seawater desalination plant 300, (Not shown).

The outer drainage path 100, the tidal-floor embankment layer 200, the seawater desalination plant 300, and the drainage area are replaced with the above-described ones.

In order to prevent the seawater introduced from the ground layer 12 of the reclaimed paper 10 except the target paper 30 from being re-introduced into the target paper 30, the outer drainage path 100 is provided with a blocking member 600 Can be built.

The blocking member 600 partially blocks the inflow of the seawater of the ground layer 12 of the reclaimed land 10 into the target paper 30 as the eco-friendly material such as the shore of a shore is pushed onto the floor of the outer drainage path 100.

At this time, the depth of the blocking member 600 or the depth of the blocking member 600 is not limited. In addition, the blocking member 600 is formed continuously along the outer drainage passage 100.

The reference numerals not described are replaced with those described above.

4 is a cross-sectional view showing a schematic configuration of a decontamination system for a designated part of a reclaimed land according to a third embodiment of the present invention.

Referring to FIG. 4, a decontamination system for a part of a reclaimed land 10 according to a third embodiment of the present invention includes an outer drainage path 100, a tidal flat soil layer 200, and a seawater desalination plant 300.

The outer drainage line 100, the tidal-floor embankment layer 200, and the seawater desalination plant 300 are replaced with those described above.

The target paper 30 may form the capillary phenomenon prevention layer 700 before the tidal flats 200 are covered.

The capillary phenomenon prevention layer 700 forms an outer drainage path 100 and the seawater is capillary in a state of being decontaminated after embedding the tideland subsoil layer 200 in the target sheet 30, .

Particularly, the capillary phenomenon prevention layer 700 includes the gravel layer 710.

The gravel layer 710 is formed by applying a gravel layer to the surface of the target paper 30 so as to expand the gap to prevent the seawater from rising to the ground surface due to the capillary phenomenon inside the reclaimed paper 10 including the target paper 30 do. At this time, the thickness of the gravel and the coating layer (height) forming the gravel layer 30 are not limited.

Then, the capillary phenomenon prevention layer 700 forms a fabric layer 720.

The fabric layer 720 is formed by covering the upper side of the gravel layer 710 with the gravel layer 710 to prevent the dredged soil of the tidal-floor layer 200 from flowing into the gap.

At this time, the fabric layer 720 is made of a material capable of permeating fresh water.

Of course, the height or material of the fabric layer 720 is not limited.

In other words, the embankment covers the fabric layer 720 of synthetic fibers or the like which is originally formed by forming a gravel layer 710 of about 20 cm or so in the land surface of the reclaimed land, passing water thereon and filtering out the soil puddle Cover the tidal flats. The gravel layer (710) dissolves salinity of the tidal flat buried soil layer (200) to fill the tidal flat buried layer (200) during the soil salinity removal period and acts as a flowing water channel to the gravel layer and slowly permeates into the existing reclaimed tidal flat Saline forms a thin water film.

At this time, the seawater desalination facility 300 may be provided at various locations (areas) such as the reclaimed land 10, but is shown as being provided on the fabric layer 720 for convenience.

Of course, when the tidal flats are rich in sand, sediment, and gravel, the gravel layer 710 can be omitted because the drainage is good.

The reference numerals not described are replaced with those described above.

5 is a flowchart showing a decontamination method for a designated part of the reclaimed land according to the first embodiment of the present invention.

1 and 5, the decontamination method for a part of the ground of the reclaimed land 10 according to the first embodiment of the present invention includes a forming step S10 for forming an outer drainage, a resin forming step S20, (S30) and a decontamination treatment step (S40).

The forming step S10 is a step of forming an outer drainage path 100 in which soil is continuously poured along the edge of the target paper 30 among all the grounds of the reclaimed paper 10. Through this step S10, seawater existing in the ground layer 12 of the reclaimed paper 10 and the target paper 30 flows into the outer drainage path 100 and becomes solid.

The reclaimed resin forming step S20 is a step of digging the tidal flats so that the depth of the outer drainage path 100 is deeper than the depth of the outer drainage path 100 and is wider than the width of the outer drainage path 100 at one place of the drainage drainage 100. [

In addition, flooding and drainage promotion step (S30) is a process for embedding the target paper 30 after dug up the tidal flats to form an intake paper connected to the outer drainage path 100 and the outer drainage path 100. At this time, soil pores are formed in the process of excavation, dredging, transportation, transportation, getting off, and flattening. Therefore, the pores of the existing target paper 30 become smaller than the pores of the clay soil. Therefore, as the pore is developed in the tidal flat soil layer 200, permeation of fresh water or storm water is easy. As a result, the decontamination treatment of the target paper 30 is promoted.

In the decontamination treatment step S40, fresh water, which is essential for decontamination of the target paper 30, is discharged to the outer drainage path 100 while guiding the seawater existing in the ground layer 12 of the target paper 30 to flow out to the outer drainage path 100, A seawater desalination plant 300 using seawater desalinated in the seawater as raw water is installed near the resin and the seawater desalination plant 300 is operated to produce and supply fresh water, (200), the salinity of the tidal flats (200) is lowered to the level of the normal soil by dissolving the saline in the tidal flats and leaching into the drainage tanks or penetrating under the gravel layer.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. I will understand. Accordingly, the true scope of the present invention should be determined by the following claims.

10: Reclaimed land 20: Seawater
30: Target paper 100: Outer drainage
200: Tidal flat buried layer 300: Seawater desalination plant
400: wasted resin 500: water pump
600: blocking member 700: capillary phenomenon prevention layer
710: gravel layer 720: fabric layer

Claims (6)

Outer drainage of sea water;
The tidal flats having the outer troughs and the trough filler troughs formed to form the trough connected to the outer troughs are filled at a suitable height so as to be utilized as embankment resources of the target site in a state in which the voids are enlarged; And
And a seawater desalination plant for desalinizing seawater pumped into the seawater and the outer drainage path and supplying the seawater desalination plant to the tideland-
The outer drainage channel is formed along the edge of the target sheet of the reclaimed land and the seawater existing in the ground of the reclaimed land is naturally flowed out from the underground of the target sheet,
Wherein the seawater desalination apparatus is replenished with fresh water produced by the seawater desalination apparatus after the seawater existing in the stratum of the target sheet flows out to the outside drainage passage and the underground sea level of the target sheet is lowered, Decontamination system for target paper.
The method according to claim 1,
And a blocking member is formed on the bottom to prevent the seawater introduced from the ground layer of the reclaimed paper other than the target paper from being reintroduced into the target paper. .
The method according to claim 1,
Wherein the target sheet forms a capillary phenomenon prevention layer of seawater before the tideland submerged layer is formed on the ground surface.
The capillary phenomenon prevention layer according to claim 3,
And a gravel layer formed on a surface of the target paper so as to prevent seawater from rising to the ground surface due to capillary phenomenon inside the target paper.
The capillary phenomenon prevention layer according to claim 4,
And a fabric layer provided on the gravel layer and capable of permeating fresh water to prevent the gravel layer from entering the tidal floored soil layer and reducing the voids, Decontamination system.
A step of forming an outer drainage line forming an outer drainage path along the edge of the target paper of the entire landage of the reclaimed land;
Forming a tidal flat so as to be deeper than the depth of the outer trough in one of the outer troughs and wider than the width in the outer trough;
A flooding and drainage promotion step of shortening the drainage time by forming a tidal flat soil layer by using the tidal flats to form the outer drainage path and the drainage paper and using the tidal flats as embankment resources of the target paper in a state of enlarged voids; And
A seawater desalination apparatus is installed near the outer drainage channel and the outer drainage channel so as to enable the decontamination treatment of the target paper while inducing the seawater present in the ground layer of the target paper to flow into the outer drainage channel, And a desalination treatment step of supplying desalination treatment to the tidal flat soil layer by producing fresh water,
In the formation of the outer drainage, the seawater existing in the ground of the reclaimed land is naturally spilled out from the ground of the target soil,
Wherein the fresh water produced by the seawater desalination equipment is replenished after the sea water level of the target paper is lowered while the seawater existing in the stratum of the target paper flows out to the outside drainage, Decontamination method.

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