KR101237937B1 - Echo-friendly dredging method in dredging area - Google Patents

Abstract

PURPOSE: An eco-friendly dredging method within a dredging region is provided to automatically remove sediments depending on the water level or the flow velocity of a river by burying a collector in a river bed within the dredging region, thereby environmentally and easily removing the increasing sediment without destroying an ecosystem. CONSTITUTION: An eco-friendly dredging method within a dredging region comprises: a step of generating a water level measuring signal or a flow velocity measuring signal by detecting the increase or the decrease of the water level or the flow velocity of a river with a water gauge(141) or a current meter(142) installed within the dredging region; a step of receiving the water level measuring signal or the flow velocity measuring signal, and identifying whether the signals exceed predetermined references with a controlling part(110); a step of collecting sediment including river water and soil with a collector(120), and actuating a suction pump(130) for sucking the collected sediment; a step of separating the sucked sediment into the river water and the soil with a sediment treating part(150); a step of discharging the soil to a spoil bank, and the river water to the river(200); a step of identifying whether the water level measuring signal or the flow velocity measuring signal are dropped below the predetermined references with the controlling part; and a step of stopping the suction pump with the controlling part when the water level measuring signal or the flow velocity measuring signal are dropped below the predetermined references. [Reference numerals] (110) Controlling part; (120) Collector; (150) Sediment treating part; (160) Suction pipe; (180) Discharge pipe; (190) Control room; (200) River; (AA) Spoil bank; (BB) River water

Description

Eco-friendly dredging method in dredging area {ECHO-FRIENDLY DREDGING METHOD IN DREDGING AREA}

The present invention relates to a dredging of a river, and more particularly, to an environmentally-friendly dredging method for embedding a collector at a river bottom in a dredging area and automatically removing sedimentary soil in response to a rise and fall of a river level and / or a river flow rate. will be.

Rivers and rivers naturally deposit minerals, earth particles, animals and plants, carcasses of microorganisms, insoluble salts such as calcium, magnesium, iron, and manganese, which are eroded and carried by the flow of water, or are included in domestic sewage or factory wastewater. The harmful chemicals and organic substances are mixed and deposited to form sedimentary layers, which have a great influence on the preservation of the water environment.

For example, when examining the water quality in areas where the water quality is not good because of the dark color of the river, it is often not bad. This is due to the color of the sedimentary layers at the bottom of the river. This sediment layer not only causes this visual problem, but also causes a vicious cycle in which organic matter, nitrogen, phosphorus, or heavy metals contained in the sediment deplete oxygen, thereby lowering the amount of dissolved oxygen, thereby intensifying water pollution. Sometimes.

Meanwhile, sediment refers to gravel, sand, clay, organic materials, minerals, etc., which flow from land and accumulate on the surface of lakes, rivers, and the sea. Such dredging is artificially excavated and taken out to the outside for the purpose of securing fresh water in rivers or lakes, port sites, etc., improving water quality, collecting construction aggregates, maintaining waterways or routes, and reclaiming projects. Sediment discharged from outside is called dredged soil.

The most practical problems associated with such sedimentary soils are the flooding and deterioration of rivers due to the deterioration of the river's water permeability, and also due to the industrialization, various pollutants emitted by human activities for a long time, namely ecosystem or human body. It may contain substances such as heavy metals and organochlorine pesticides in concentrations that may adversely affect health. Therefore, the increase of the sediment is to reduce the amount of water, the amount of water flow, and to accelerate the water pollution by the turnover phenomenon and the elution from the deposited pollutant due to the seasonal temperature difference.

Therefore, in order to manage the quality of rivers and lakes, sediments accumulated at the bottom are dredged and removed periodically, not only for the management of external pollutants but also for the management of sediment layers as internal pollutants.

On the other hand, as a related technology, Korean Patent No. 10-639042 discloses an invention named "purification system of dredged sediment", it will be described with reference to FIG.

1 is an operational flow diagram illustrating the operation of a dredged sediment purification system according to the prior art.

Dredged sediment purification system according to the prior art, a system for dredging and purifying polluted sediment in rivers and lakes, including a centrifuge, a supernatant treatment unit, a screw and a storage tank, and goes through the process as shown in FIG.

 The centrifuge performs dredging and sedimentation at the same time by adding washing water to dredged sediment in rivers or lakes.

The supernatant treatment unit includes a dehydrator that discharges the supernatant separated from the centrifuge and precipitates the solids in the settling tank after dehydrating the supernatant from the mixer.

The screw is filled with washing water to the gravity-dropped slurry in the lower portion of the centrifuge is carried out continuously and the secondary washing.

The storage tank stores the washed slurry transferred from the screw.

The dredged sediment purification system according to the prior art dredges sediment or sedimentation sludge, which accumulates on the bottom of a river or lake, causing water pollution, and purifies the dredged sediment efficiently and at low cost.

On the other hand, as another related technology, Korean Patent No. 10-1048641 discloses the invention named "drilling soil and sewage treatment method and treatment system using the same", it will be described with reference to FIG.

Figure 2 is a block diagram of a dredged soil and sewage treatment system according to the prior art.

Referring to FIG. 2, the dredged soil and muddy water treatment system according to the related art includes a dredged soil and muddy water collection unit 10, a memory 20, an input device 30, a dredged soil and a muddy water treatment unit 40 and a controller. 50, wherein the dredged soil and the sewage water treatment unit 40 include a multi-stage screen 41, a solid-liquid separation tank 42, a water treatment device 43, a solids separation device 44, and a storage stirring tank ( 45), dehydration device 46 and mixture treatment system 47.

Dredged soil and sewage collection unit 10 is for collecting sediments of lakes or rivers, for example, may be a suction pump or an excavator. In this case, when a large component such as gravel in the sediment is the main component, an excavator is used, and when the small component such as mud or sand is the main component, a suction pump may be used.

The memory 20 stores reference values of the pollution degree, moisture content, and organic content ratio of the dredged soil and muddy water. In this case, the reference value may be a value defined by the waste management law, or may be a predetermined reference value.

The input device 30 inputs the pollution degree of dredged soil and muddy water, the water content of dredged soil, and the type of dredged soil and muddy water collected by an external device. As the input device 30, a keypad, a touch screen, a mouse, or the like may be used. Instead of the input device 30, through a separate detection sensor that can detect the pollution degree and components of dredged soil and muddy water, it can measure the pollution degree, moisture content, etc. of the dredged soil and muddy water and transmit it to the controller 50. .

Dredged soil and sewage treatment unit 40 processes the dredged soil and sewage collected from the wastewater collection unit (10). That is, the dredged soil and sewage treatment unit 40 is a multi-stage screen 41, solid-liquid separation tank 42, water treatment device 43, solids separation device 44, storage stirring tank 45, dewatering device 46 And dredged soil and sewage through the mixture treatment system 47.

The controller 50 measures at least one of water content of the dredged soil obtained from the dredged soil and the muddy water collection unit 10, a pollution degree of the dredged soil and the muddy water, a type of the dredged soil and the muddy water collected portion, and an organic content of the dredged soil. The measured value obtained by comparison with the reference value stored in the memory 20, thereby controlling the dredged soil and muddy water treatment unit 40 to treat the dredged soil and muddy water.

In addition, if the measured dredged soil contamination level is higher than the reference value (automatic sensing or manual input), it is possible to control the dredged soil and sewage treatment unit to solidify by adding a solidifying agent to the dredged soil. .

The dredged soil and muddy water treatment system according to the prior art analyzes the components of dredged soil and muddy water obtained from the dredged soil and the muddy water collection unit 10, and, accordingly, selects an appropriate treatment process, and environmentally friendly treatment.

On the other hand, due to the sedimentation of the rivers, the water level of the rivers rises during flooding or stormwater, causing massive damage. For example, as the flow velocity of rivers increases in rainwater, and the sedimentary deposits occur due to the movement of soils on the bottom of the rivers, it is a major cause of the rise of river water levels in floods. This increase in river level is a major cause of river flooding, causing enormous damage.

Up to now, this has been solved by dredging river sediment with dredging machine or suction pump. However, this method not only destroys the entire ecosystem of the river, but also has to be dredged again by re-deposition after time.

1) Republic of Korea Patent No. 10-639042 (application date: September 16, 2004), the title of the invention: "purification system of dredged sediment" 2) Republic of Korea Patent No. 10-1048641 (Application Date: February 8, 2010), the title of the invention: "Method of treating dredged soil and sewage and treatment system using the same" 3) Republic of Korea Patent No. 10-1074481 (application date: January 30, 2009), the title of the invention: "Eco pond pond water purification system using the discharge box" 4) Republic of Korea Patent Publication No. 2000-12193 (published: March 6, 2000), the title of the invention: "Dredging control system and dredging method using DGPS location information" 5) Republic of Korea Patent Publication No. 2005-28005 (published: March 21, 2005), the title of the invention: "Automatic continuous vacuum suction transfer system of dredged soil and sludge" 6) Republic of Korea Patent No. 10-997428 (Application Date: October 28, 2008), the title of the invention: "Pollution barrier position and shape monitoring system and monitoring method using the same" 7) Japanese Patent No. 3148314 (filed date: December 24, 1991), title of the invention: "authorized observation monitoring and purification system"

The technical problem to be solved by the present invention to solve the above problems, by embedding a collector at the bottom of the river in the dredging area to automatically remove the sediment in accordance with the water level or flow rate, thereby increasing the sediment without destroying the ecosystem of the river It is to provide an eco-friendly dredging method in dredging area, which is eco-friendly.

Another technical problem to be achieved by the present invention is to provide an eco-friendly dredging method in the dredging area, by automatically removing the sediment in the dredging area by removing the sediment in accordance with the river level or flow rate by embedding a collector in the river. It is to.

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On the other hand, as a means for achieving the above-described technical problem, environmentally friendly dredging method in the dredging area according to the present invention, a) a measurement unit installed in the dredging area to detect the rising or falling of the water level or the flow rate of the water level measurement signal or flow rate Generating a measurement signal; b) the control unit receiving the level measurement signal or the flow rate measurement signal, and confirming, by the controller, whether the level measurement signal or the flow rate measurement signal exceeds a preset reference point; c) collecting sediment containing soil water and sediment through a collector and operating the suction pump by the control unit to suck the collected sediment; d) treating the sedimented sediment by separating the sedimented soil into river water and earth and sand; e) discharging the separated soil to the soil, and discharged the treated river water into the river; f) checking, by the controller, whether the level measurement signal or the flow rate measurement signal falls below a predetermined reference point; And g) when the level measurement signal or the flow rate measurement signal falls below a predetermined reference point, the control unit stops the operation of the suction pump, wherein the suction pump receives the level measurement signal or the flow rate measurement signal. Under the control of the received control unit, the sedimentary soil deposited in the dredging area of the river is automatically removed.
The collector of step c) is made of concrete or steel, and is installed to be buried at the bottom of the river in the dredging area so as to collect only sedimentary soil moving along the river bottom. Provide a method.

Here, the collector of step c) is made of concrete or steel, characterized in that the picking device is installed on the upper surface to collect the sedimentary soil containing water and soil.

Here, the river water of step e) is discharged to the river through the discharge pump installed between the sediment treatment unit and the river.

The control unit may receive a level measurement signal or a flow rate measurement signal from the measurement unit, output a control signal for operating the suction pump, and control the operations of the sediment processing unit and the discharge pump.

Here, the sedimentary soil treatment of step d) is characterized in that to purify the soil to be reused by removing the organic matter of the soil in accordance with the degree of soil contamination.

Here, the sedimentation process of step d) is characterized in that to separate the soil to discard without removing the organic matter of the soil in accordance with the soil pollution degree.

According to the present invention, by embedding a collector at the bottom of the river in the dredging area to remove the sediment in accordance with the water level or flow rate, it is possible to easily remove the increased sediment without environmental damage to the ecology of the river. In other words, by collecting only the sedimentary soil of a certain size and moving the collector installed at a certain location within the dredging area, the micro-size of these sediment flows along the river water, and ecologically ecologically The sediment can be treated without destroying it at all.

According to the present invention, by embedding the collector in the river to remove the sediment in accordance with the river level or flow rate, it is possible to automatically remove the river sediment in the dredging area at a low cost.

1 is an operational flow diagram illustrating the operation of a dredged sediment purification system according to the prior art.
Figure 2 is a block diagram of a dredged soil and sewage treatment system according to the prior art.
3 is a block diagram of an environment-friendly dredging system in the dredging area according to an embodiment of the present invention.
4 is a view for explaining in detail the environmentally friendly dredging control operation in the dredging area according to an embodiment of the present invention.
5 is a plan view for explaining the environment-friendly dredging control operation in the dredging area according to an embodiment of the present invention.
Figure 6 is a side view for explaining the environmentally friendly dredging control operation in the dredging area according to an embodiment of the present invention.
7A and 7B are flowcharts illustrating an environmentally friendly dredging process in a dredging area according to an embodiment of the present invention, respectively.
8 is an operation flowchart of the environment-friendly dredging method in the dredging area according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. Also, the term "part" or the like, as described in the specification, means a unit for processing at least one function or operation, and may be implemented by hardware, software, or a combination of hardware and software.

First, as an embodiment of the present invention, by collecting only the sedimentary soil of a predetermined size or more to move the collector installed at a certain location in the dredging area, the fine size of these sedimentation flows along the river water, the principle that more than a certain size of the soil moves to the river bed By using the present invention, an environmentally friendly dredging system and a method thereof are provided in a dredging area which can treat sediment without environmentally damaging the ecosystem at all.

3 is a configuration diagram of an environment-friendly dredging system in the dredging area according to an embodiment of the present invention, Figure 4 is a view for explaining in detail the eco-friendly dredging control operation in the dredging area according to an embodiment of the present invention.

3 and 4, the environment-friendly dredging system in the dredging area according to an embodiment of the present invention, the control unit 110, the collector 120, the suction pump 130, the measuring unit 140, sedimentary soil treatment unit ( 150, a suction pipe path 160, a discharge pump 170, a discharge pipe path 180, and a control room 190.

The measuring unit 140 detects the rising or falling of the river water level to generate a water level measurement signal 141, and a flow meter (Current Meter: 142) to detect the rising or falling of the flow rate of the river to generate a flow rate measurement signal It may include.

Specifically, the water gauge 141 is installed in the dredging area of the river, and detects the rise or fall of the river water level to generate a water level measurement signal. For example, the water level meter 141 measures the river level in rainwater and transmits it to the controller 110. Here, the water level meter 141 is shown in the form of engraved scale, but is not limited to this, if there is an electrical level measurement signal, the float type by lifting the buoy, the pressure type by measuring the bottom pressure, the discharge of bubbles and The bubble type using the back pressure at that time, the bubble type using the conductivity of the measurement liquid, the electrode type using the conductivity of the measurement liquid, an ultrasonic method, etc. may be used.

The control unit 110 receives the level measurement signal from the water level meter 141 or receives the flow rate measurement signal from the flow meter 142, outputs a control signal for operating the suction pump 130, and the sediment processing unit 150. And controls the operation of the discharge pump 170. Specifically, the controller 110, if the river level of a certain height rises, for example, if the river level rises from point A to B in Figure 4, or if the flow rate of the river water rises above a certain speed, The suction pump 130 is operated to control the suction of the sedimentary soil containing the river water and the earth and sand through the collector 120, and the river level is lowered again, for example, at point B in FIG. If the river level is lowered to the point, or the flow rate is lowered, it is controlled to stop the operation by stopping the operation of the suction pump 130. That is, the controller 110 controls the operation of the suction pump 130 in response to the fluctuations in the water level and / or flow rate of the river.

Collector 120 is installed on the bottom of the river in the dredging area and collects the sediment to be dredged. That is, by collecting only the sedimentary soil of a certain size to move the collector 120 installed at a certain location in the dredging area, the micro-size of these sedimentation flows along the river water, so that the soil more than a certain size to move to the river bed to use the principle. do. For example, the collector 120 is made of concrete or steel, and the dust collector is installed on the upper surface thereof to suck the sediment.

The suction pump 130 is a pump capable of sucking the sedimented soil including the river water and the earth and sand through the collector 120, and may be installed underwater or in the ground.

The suction pipe line 160 is a pipe buried underground or in water, and a first suction pipe line installed between the collector 120 and the suction pump 130 to move the collected sediment soil, and the sucked sediment soil A second suction pipe passage is installed between the suction pump 130 and the sediment treatment unit 150 to move.

The sedimentary soil treatment unit 150 is a purification treatment unit 151 for purifying the soil to be reused by removing the organic matter of the soil according to the soil contamination, or to dispose the soil without removing the organic matter of the soil according to the soil pollution. The separation processing unit 152 may be separated. For example, the purification processing unit 151 separates and cleans the sediment soil sucked through the suction pump 130 into soil and river water, and discharges the purified soil to the soil.

The discharge pump 170 discharges the river water treated by the sedimentation treatment unit 150 to the river. That is, the discharge pump 170 discharges the river water purified by the purification processing unit 151 or the river water separated by the separation processing unit 152 from the sediment sucked by the suction pump 130 to the river 200. .

The discharge pipe 180 is between the purification processing unit 151 and the river or between the separation processing unit 152 and the river so that the river water purified by the purification processing unit 151 or the river water separated by the separation processing unit 152 is discharged to the river. Installed between, for example, when the river water and the soil is separated, it is a pipeline for discharging the separated river water back to the river (200).

In addition, between the measuring unit 140 and the control unit 110 and the control unit 110 and suction so that the measuring unit 140 and the control unit 110 and the control unit 110 and the suction pump 130 are connected by a wire. Conduits may be embedded between the pumps 130, respectively.

The control room 190 is remotely connected to the control unit to check all dredging processes, and manually or automatically manages the operation of the control unit according to a pre-installed manual control or automatic control program.

Environment-friendly dredging system in the dredging area according to an embodiment of the present invention, by embedding the collector 120 on the bottom of the river in the dredging area to remove the sediment in accordance with the water level or flow rate, increased sedimentary soil without destroying the ecosystem of the river It can be easily removed eco-friendly. In addition, it is possible to automatically remove sediment in rivers in dredging areas at low cost.

On the other hand, Figure 5 is a plan view for explaining the eco-friendly dredging control operation in the dredging area according to an embodiment of the present invention, Figure 6 is a side view for explaining the environment-friendly dredging control operation in the dredging area according to an embodiment of the present invention.

In the environment-friendly dredging system in the dredging area according to an embodiment of the present invention, the collector 120 is buried in the bottom of the river in the dredging area, as shown in Figure 5, to collect the sediment containing the river water and the soil.

In addition, as shown in Figure 6, the collector 120 is made of concrete or steel, the dust collector is installed on the upper surface can collect the sedimentary soil. That is, by collecting only the sedimentary soil of a certain size to move the collector 120 installed at a certain position in the dredging area, the micro-size of these sedimentation flows along the river water, using the principle that more than a certain size of soil is moved to the river bed. At this time, the sedimentary soil containing a predetermined size or more of the soil is collected and sucked through the suction pipe line 160.

On the other hand, environmentally friendly dredging method in the dredging area according to an embodiment of the present invention can be divided into a manual method and an automatic method.

In the case of the manual method, a control program is installed in the control room 190, for example, on a PC to check the level of the water level and operate it manually. In addition, in the case of the automatic method, when the level gauge 141 or the flow meter 142 of the measuring unit 140 detects that the river level or the flow rate of the river has risen above a predetermined reference point, the controller 110 detects the suction pump 130. When the water level gauge 141 or the flow meter 142 detects that the river level or the flow rate of the river falls below the reference point, the controller 110 stops the operation of the suction pump 130.

Hereinafter, with reference to FIGS. 7A, 7B and 8, an eco-friendly dredging method in a dredging area according to an embodiment of the present invention will be described in detail.

7A and 7B are flowcharts illustrating an environmentally friendly dredging process in a dredging area according to an embodiment of the present invention, and FIG. 8 is an operation flowchart of an environmentally friendly dredging method in a dredging area according to an embodiment of the present invention.

First, in an environment-friendly dredging process in the dredging area according to an embodiment of the present invention, the sedimentary soil treatment unit 150, as shown in Figure 7a, purifies to remove the organic matter of the soil according to the soil pollution degree, so that the soil can be reused The purification processing unit 151 may be processed. For example, the purification processing unit 151 separates and cleans the sediment soil sucked through the suction pump 130 into soil and river water, and discharges the purified soil to the soil.

In addition, the sedimentary soil treatment unit 150, as shown in Figure 7b, may be a separation treatment unit 152 for separating so as to discard the soil without removing the organic matter of the soil according to the soil contamination. For example, the separation processing unit 153 separates the sediment soil sucked through the suction pump 130 into soil and river water, and discharges the soil without removing the organic matter of the soil to the soil.

Referring to FIG. 8, in an environment-friendly dredging method in a dredging area according to an embodiment of the present invention, first, an automatic control program for controlling sedimentary dredging in a dredging area is installed in a control room ( S110 ).

Next, the level gauge 141 installed in the dredging area detects the rise or fall of the river level to generate a water level measurement signal, or the tachometer 142 generates a flow rate measurement signal by detecting the rise or fall of the river flow rate ( S120 ).

Next, the controller 110 receives the water level measurement signal or the flow rate measurement signal, and the controller 110 checks whether the water level measurement signal or the flow rate measurement signal exceeds a predetermined reference point ( S130 ).

Next, as illustrated in FIGS. 7A and 7B, the sedimentary soil including the river water and the earth and sand is collected through the collector 120, and the collected sedimentary soil is collected through the first and second suction pipe lines 160a and 160b. The control unit 110 operates the suction pump 130 to inhale (S140 ). Here, the collector 120 is made of concrete or steel, and the dust collector is installed on the upper surface to suck up the sediment.

Next, the sedimentary soil treatment unit 150 separates the sucked sedimentary soil into river water and earth and sand ( S150 ).

Next, the separated soil is discharged to the soil, the treated river water is discharged to the river 200 ( S160 ). At this time, the treated river water is discharged to the river through the discharge pump 170 installed between the sediment treatment unit 150 and the river 200. That is, the controller 110 receives the level measurement signal or the flow rate measurement signal from the water level meter 141 or the flow meter 142, and outputs a control signal for operating the suction pump 130, and the sediment processing unit 150 And control the operation of the discharge pump 170.

Next, the controller 110 checks whether the water level measurement signal or the flow rate measurement signal falls below a predetermined reference point ( S170 ).

Next, when the level measurement signal falls below a predetermined reference point or when the flow rate measurement signal falls below a preset reference point, the controller 110 stops the operation of the suction pump 130 ( S180). ).

Therefore, the environment-friendly dredging system and method in the dredging area according to an embodiment of the present invention, by embedding a collector at the bottom of the river in the dredging area to automatically remove the sediment in accordance with the water level or flow rate, without increasing the ecosystem of the river The sediment can be easily removed eco-friendly. In addition, it is possible to automatically remove sediment in rivers in dredging areas at low cost.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

100: eco-friendly dredging system
200: river
110: control unit
120: Collector
130: suction pump
140:
141: water gauge
142: tachometer
150: sediment treatment unit
151: purification processing unit
152: separation processing unit
160: suction line
170: discharge pump
180: discharge pipe
190: control room

Claims (15)

delete delete delete delete delete delete delete delete delete a) generating a level measurement signal or a flow rate measurement signal by detecting a rising or falling level of the river level or the flow rate of the measurement unit installed in the dredging area;
b) the control unit receiving the level measurement signal or the flow rate measurement signal, and confirming, by the controller, whether the level measurement signal or the flow rate measurement signal exceeds a preset reference point;
c) collecting sediment containing soil water and sediment through a collector and operating the suction pump by the control unit to suck the collected sediment;
d) treating the sedimented sediment by separating the sedimented soil into river water and earth and sand;
e) discharging the separated soil to the soil, and discharged the treated river water into the river;
f) checking, by the controller, whether the level measurement signal or the flow rate measurement signal falls below a predetermined reference point; And
g) the control unit stopping the operation of the suction pump when the level measurement signal or the flow rate measurement signal falls below a predetermined reference point;
Including, but the suction pump automatically removes the sediment deposited on the dredging area of the river under the control of the control unit receiving the water level measurement signal or the flow rate measurement signal,
The collector of step c) is made of concrete or steel, and is installed to be buried at the bottom of the river in the dredging area so as to collect only sedimentary soil moving along the river bottom, and the dredging device is installed so as to expose the dust collector installed on the upper surface. Eco-friendly dredging method in the area. The method of claim 10,
The collector of step c) is made of concrete or steel, eco-friendly dredging method in the dredging area, characterized in that the dust collector is installed on the upper surface is collected sediment containing water and soil. The method of claim 10,
The stream water of step e) is environmentally friendly dredging method in the dredging area, characterized in that discharged to the river through the discharge pump installed between the sediment treatment section and the river. The method of claim 12,
The controller receives a water level measurement signal or a flow rate measurement signal from the measurement unit, outputs a control signal for operating the suction pump, and controls the operation of the sedimentary soil processing unit and the discharge pump. Way. The method of claim 10,
The sedimentary soil treatment step of step d) is an environmentally friendly dredging method in the dredging area, characterized in that to purify the soil to be reused by removing the organic matter of the soil according to the soil pollution. The method of claim 10,
Sedimentary soil treatment of step d) eco-friendly dredging method in the dredging area, characterized in that to separate the sediment without removing the organic matter of the soil according to the soil pollution degree.

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