A coastal mudflat siltation promoting device and its operation method

Abstract

This invention proposes a coastal mudflat siltation promoting device, comprising a base box, a rigid plate, a soft cloth, and a buoy. The base box is used for installation in an installation trench excavated on the coastal mudflat. A method for applying this device is also proposed, comprising: transporting the device to the target coastal mudflat when it is exposed at low tide; determining the device's orientation so that it extends along the coastline, ensuring that the side plate of the base box connected to one side of the rigid plate is located on the sea side; excavating the installation trench on the coastal mudflat surface, the trench depth being the same as the height of the base box; placing the device in the installation trench and fixing it so that the device is level with the coastal mudflat surface after installation; flipping up the rigid plate and filling the excavated silt into the base box through the unsealed gap between the bottom edge of the soft cloth and the top edge of the rear side plate of the base box; sealing or sewing the gap between the bottom edge of the soft cloth and the top edge of the rear side plate of the base box. This invention improves the efficiency of coastal siltation and land reclamation.

Description

Technical Field

[0001] This invention relates to the field of coastal engineering tidal flat siltation technology, specifically to a coastal tidal flat siltation device and its application method; this invention is particularly suitable for siltation application scenarios where coastal biodiversity restoration is needed or where existing coastal tidal flats have been eroded and need to be repaired. Background Technology

[0002] Coastal mudflats are unique zones situated between the ocean and land, embodying the fusion of land and sea, and forming one of the most vibrant ecosystems on Earth. In recent years, due to the impacts of global climate change and human development along the coast, sediment loss in some coastal areas has led to the degradation or erosion of coastal mudflats. To protect the coastal ecological environment, mudflat protection or siltation-promoting measures are often necessary.

[0003] Traditional measures for protecting or promoting siltation of tidal flats include engineering measures such as constructing groynes and submerged dikes, or vegetation measures such as planting mangroves. However, engineering measures involve large investments, and groynes and submerged dikes are exposed at low tide, which themselves have a certain impact on the coastal ecological environment. Vegetation measures are slow to take effect and have high maintenance costs.

[0004] In the prior art, Chinese patent document CN120776665A discloses a silt-promoting device for coastal zone remediation and restoration, comprising: a silt-promoting component and a caisson arranged sequentially from top to bottom. The silt-promoting component includes multiple silt-promoting modules connected by side. The top side of the silt-promoting component is used to fix it to the coast. The silt-promoting module includes: a frame and multiple anti-current plates. The multiple anti-current plates are arranged sequentially from top to bottom in the frame. The two ends of the anti-current plates are rotatably connected to the opposite sides of the frame. Adjacent silt-promoting modules are rotatably connected through one side of the frame. A settling cavity is opened at the top of the caisson, and a permeable material is provided in the settling cavity. A guide hole penetrating both sides is opened on the water-facing and back-facing surfaces of the caisson, and the bottom side of the silt-promoting module is connected to the caisson and located above the settling cavity. The existing technical solution uses a fixed, tilted back filter, which has the following drawbacks: First, the back filter will block some silt from entering the mudflats, reducing the overall efficiency of siltation and mudflat creation. Second, to cope with the impact of high tides, the structural rigidity of the back filter needs to be strengthened, which increases construction costs and makes construction inconvenient. Third, this existing technical solution requires ecological siltation promotion in conjunction with seedling planting, which requires the cooperation of the landscaping department, and its construction costs are high and the cycle is long.

[0005] In the prior art, Chinese patent document CN120026580A discloses a flexible anti-erosion and sedimentation system, which includes a buoyancy-resistant flow-blocking net and an anchoring system. The buoyancy-resistant flow-blocking net includes multiple buoys, a cable net, and an anchoring system interface. The multiple buoys are connected to the cable net, and the anchoring system interface is located at the bottom of the cable net. The anchoring system includes multiple anchors, each anchor including a movable connection structure, an anchor rod, and an anchor claw. The movable connection structure is located at the top of the anchor rod, and the anchor claw is movably connected to the anchor rod. This technical solution has a low efficiency in forming a silt layer, thus affecting the overall progress of beach formation. Furthermore, it requires on-site installation of the anchoring system and sand pillows, which increases construction difficulty and cost.

[0006] Furthermore, although there are many existing implementation schemes for land reclamation by filtering silt in hydraulic reclamation projects, these schemes are not applicable to applications involving land reclamation through natural tidal action on coastal mudflats. Summary of the Invention

[0007] In view of this, it is necessary to address the shortcomings and deficiencies of existing technologies by proposing a coastal siltation device and its application method to improve the efficiency of coastal siltation and land reclamation.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] This invention proposes a coastal mudflat siltation device, comprising a base box for installation in an installation trench excavated in the coastal mudflat, and further comprising a rigid plate, a soft cloth, and a buoy. The base box is elongated. One side of the rigid plate is connected to the first top edge of a side plate of the base box, and the rigid plate is rotatable around the first top edge. The other two sides of the rigid plate are fixedly connected to the buoy. One side of the soft cloth is connected to the second top edge of the opposite side plate of the base box, and the other two sides of the soft cloth are connected to the fixed joint between the rigid plate and the buoy. When the device is installed on the coastal mudflat and faces low tide or in a still water test environment, under the buoyancy of the buoy, the rigid plate rotates and flips up around the first top edge, while the soft cloth is pulled up. When the device is installed on the coastal mudflat and faces high tide, the rigid plate flips down and closes towards the virtual top surface of the base box under the impact force of the high tide. The soft cloth is used to limit the maximum angle of rotation of the rigid plate under the buoyancy of the buoy to no more than 90 degrees.

[0010] Furthermore, one side of the rigid plate is hinged or flexibly connected to the first top edge of one side plate of the base box.

[0011] Furthermore, the two sides of the soft cloth are directly connected to the two sides of the base box, respectively; or the left side of the soft cloth is connected to the left side of the base box through an intermediate connector, and the right side of the soft cloth is connected to the right side of the base box through another intermediate connector.

[0012] Furthermore, one of the intermediate connectors is the left end fabric, and the other intermediate connector is the right end fabric;

[0013] Both the left and right end fabrics are used to seal or allow water to pass through the sides of the base box and the combination of rigid board and soft fabric.

[0014] Furthermore, both the left and right ends of the fabric are triangular.

[0015] Furthermore, both the hardboard and the soft cloth are made of a material that is permeable to water but not to mud and sand.

[0016] Furthermore, when the device is installed on a coastal mudflat facing low tide or in a still water experimental environment, the float is located at the vertical top of the device, the base box is located at the vertical bottom of the device, and the rigid plate and soft cloth are located in the vertical middle of the device, with the rigid plate and soft cloth spaced apart at an angle.

[0017] Furthermore, the basic box body includes a rear side panel, a front side panel, a left side panel, a right side panel, and a bottom panel;

[0018] The bottom edge of the rigid plate is hinged or flexibly connected to the top edge of the front side panel of the box, so that the rigid plate can swing around the top edge of the front side panel of the box.

[0019] When the device is installed on the coastal mudflats, the bottom edge of the soft cloth is sewn together with the top edge of the rear side panel of the box.

[0020] When the device is installed on a coastal mudflat facing low tide or in a still water test environment, under the buoyancy of the float, the rigid plate rotates and flips up around the top edge of the front side plate of the box and is restricted by the soft cloth, so that the angle between the rigid plate and the virtual top surface of the base box does not exceed 90 degrees.

[0021] When the device is not installed on the coastal mudflat, the left side of the soft cloth is connected to the left side of the base box, and the right side of the soft cloth is connected to the right side of the base box.

[0022] When the device is installed on a coastal mudflat facing low tide or in a still water experimental environment, and the rigid board and soft cloth are spread apart at an angle, the rigid board and soft cloth are set up in an inverted V shape, a V-shaped upward mirror shape, an inverted γ shape, a γ-shaped upward mirror shape, an inverted レ shape, a レ-shaped upward mirror shape, or a shape like a canopy tent.

[0023] Both the rigid board and the soft cloth are rectangular;

[0024] The basic box contains several partitions.

[0025] The present invention further proposes an operational method for using the coastal mudflat siltation promoting device described in any of the above claims, the method comprising the following steps:

[0026] S1, when the coastal mudflats are exposed at low tide, transport the device to the target coastal mudflats;

[0027] S2, determine the orientation of the device so that it extends along the coastline and ensure that the side plate of the base box connected to one side of the rigid plate is located on the sea side.

[0028] S3. Excavate an installation trench on the coastal mudflat. The depth of the installation trench is the same as the height of the foundation box. Place the device into the installation trench and fix it so that the device is at the same height as the coastal mudflat after installation.

[0029] S4, flip up the hard board, and fill the mud and sand excavated from the excavation and installation trench into the foundation box through the unstitched gap between the bottom edge of the soft cloth and the top edge of the side plate of the foundation box facing the land area. Then, close or sew the gap between the bottom edge of the soft cloth and the top edge of the side plate of the foundation box facing the land area.

[0030] Furthermore, the method also includes the following steps:

[0031] S5, when the tide flows inland, the rigid plate is in a tilted state, allowing the water flow to carry sediment smoothly through and deposit on the land side; when the tide flows outward, the rigid plate, under the restriction of the soft cloth, can rotate up to 90 degrees to an upright state or be in a tilted state, thereby effectively intercepting sediment to prevent it from being lost into the sea; then the device installed at this time is used to repeatedly promote sedimentation and interception until the required sedimentation height is reached;

[0032] S6. To further increase the siltation height, the next device will be installed again based on S1-S5 on the already silted coastal mudflats, and the siltation interception will be carried out repeatedly using the next device.

[0033] The beneficial effects of this invention are as follows:

[0034] This invention improves the efficiency of coastal siltation and land reclamation, while also reducing the cost of coastal siltation and minimizing adverse impacts on the coastal ecological environment. The application of this invention to coastal siltation or erosion restoration projects is of great significance to economic and social development and even ecological protection.

[0035] The invention also has the following advantages: the overall structure is simple, easy to manufacture, easy to install, and can be fixed by backfilling with excavated mud and sand on site. It has low cost and can achieve the goal of promoting siltation or repairing erosion by relying on the repeated action of tidal currents after implementation. It does not require long-term operation and maintenance investment and has good application prospects. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of a coastal mudflat siltation promoting device according to the present invention, viewed from a perspective.

[0037] Figure 2 for Figure 1 The left view;

[0038] Figure 3 This is a three-dimensional structural diagram of a base box with several partitions installed according to the present invention.

[0039] Figure 4 This is a schematic diagram illustrating the working principle of a coastal mudflat siltation device of the present invention during high tide.

[0040] Figure 5 This is a schematic diagram illustrating the working principle of a coastal mudflat siltation promoting device during low tide, according to the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Rigid board; 2. Float; 3. Soft cloth; 4. Base box; 5. Left end cloth; 6. Right end cloth; 46. Rear side panel; 41. Front side panel; 42. Left side panel; 43. Right side panel; 44. Bottom panel; 45. Partition. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be further described clearly and completely below in conjunction with the embodiments of this invention. It should be noted that the described embodiments are merely some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0044] As used in this specification and the following claims, the words “a,” “an,” and “the” have the meaning of plural references unless the context clearly indicates otherwise.

[0045] The terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, the use of “first,” “second,” “third,” and “fourth” to designate a feature may explicitly or implicitly include one or more of that feature.

[0046] Example 1

[0047] like Figures 1-3 As shown:

[0048] This embodiment proposes a coastal mudflat siltation device, comprising a base box 4, a rigid plate 1, a soft cloth 3, and a float 2. The base box 4 is used for installation in an installation groove excavated on the coastal mudflat (including sandy beach). The base box 4 is elongated. One side of the rigid plate 1 (this side is the third side of the rigid plate 1) is connected to the first top edge of one side plate of the base box 4 (this side plate is the first side plate), and the rigid plate 1 can rotate around the first top edge. The other pair of sides of the rigid plate 1 (this side is the fourth side of the rigid plate 1, with the third side and the fourth side opposite each other) are fixedly connected to the float 2. One side of the soft cloth 3 (this side is the first side of the soft cloth 3) is connected to the other opposite side plate of the base box 4 (this side plate is the second side plate, the third side plate, the fourth ... The first side plate is connected to the second top edge of the second side plate (which is opposite to the first side plate), and the other pair of sides of the soft cloth 3 (which is the second side of the soft cloth 3, with the first side opposite to the second side) are connected to the fixed joint between the rigid plate 1 and the float 2. When the device is installed on the coastal mudflat and faces low tide or in a still water test environment, under the buoyancy of the float 2, the rigid plate 1 rotates and flips up around the first top edge, and the soft cloth 3 is pulled up and raised. When the device is installed on the coastal mudflat and faces high tide, the rigid plate 1 flips down and closes around the first top edge towards the virtual top surface of the base box 4 under the impact force of the high tide. The soft cloth 3 is used to limit the maximum angle of rotation of the rigid plate 1 under the buoyancy of the float 2 to no more than 90 degrees.

[0049] According to the application principle of this invention, after the coastal mudflat siltation device of this invention is laid on the coastal mudflat, when the tide level is higher than the device, the buoy 2 floats up and drives the rigid plate 1 to rotate and rise; as Figure 4 As shown, when the water flows from the sea to the land (that is, when the tide is in the land direction), the rigid plate 1 rotates in the land direction and fits onto the virtual top surface of the base box 4 under the impact of the water flow, without obstructing the flow of water and sediment to the land. This is conducive to the transport and deposition of sediment / silt to the land side with the water flow.

[0050] like Figure 5 As shown, when the water flows from the land to the sea (that is, when the tide is in the sea direction), the rigid plate 1 also tends to rotate in the sea direction under the impact of the water flow. However, due to the restriction of the soft cloth 3, it can only rotate to a vertical position (that is, the maximum angle of 90 degrees), forming a vertical embankment. Since most of the mud / silt carried by the water flow is located at the bottom of the water flow, the vertical embankment formed when the rigid plate is upright will effectively intercept the mud / silt, causing the mud / silt to be deposited on the land side.

[0051] Through repeated action under the two water flow conditions and the guarantee of normal rotation of the rigid plate, the input of mud / silt on the land side of this device can be greater than the output, gradually accumulating into shoals, which has the effect of promoting siltation or repairing erosion.

[0052] This device can adjust its state (tilted down or upright) according to the direction of the tidal current, enhancing its flexibility and functionality, enabling it to work effectively under different conditions, improving overall efficiency, and making it widely applicable in coastal engineering. This expands its application scope, making it suitable for various coastal types and engineering projects, and increasing its market competitiveness.

[0053] In some embodiments, the depth of the mounting groove is consistent with the height of the base box 4, and is used to embed the base box 4 therein to ensure that the top surface of the base box 4 is flush with the ground.

[0054] In some embodiments, one side of the rigid plate 1 (which is the third side of the rigid plate 1) is hinged or flexibly rotatably connected to the first top edge of one side plate (which is the first side plate) of the base box 4.

[0055] In some embodiments, the two sides of the soft cloth 3 are directly connected to the two sides of the base box 4, respectively; or the left side of the soft cloth 3 is connected to the left side of the base box 4 through an intermediate connector, and the right side of the soft cloth 3 is connected to the right side of the base box 4 through another intermediate connector.

[0056] Specifically, the left side of the soft cloth 3 is directly or indirectly connected to the left side of the base box 4, and the right side of the soft cloth 3 is directly or indirectly connected to the right side of the base box 4; this ensures the structural stability of the device during transportation and storage, facilitates subsequent installation, and also prevents the soft cloth from being damaged or loosened when not in use.

[0057] Further optimized, one intermediate connector is the left end fabric 5, and the other intermediate connector is the right end fabric 6.

[0058] Further optimized, the left end fabric 5 and the right end fabric 6 (at Figure 1 In the middle, under non-transparent conditions, the right end of the cloth 6 is covered by the soft cloth 3 in the line of sight. Both can be used to seal or make water-permeable seal the sides of the combination structure of the base box 4, the rigid plate 1 and the soft cloth 3.

[0059] Further optimized, both the left end fabric 5 and the right end fabric 6 are triangular.

[0060] In some embodiments, the rigid plate 1 and the soft cloth 3 are both made of a water-permeable but sand-impermeable material. The sand-impermeable material of the soft cloth 3 prevents deposited sand from entering below the rigid plate 1 and affecting the closing of the rigid plate 1, ensuring that the rigid plate 1 can rotate, close, and stand upright normally. At the same time, the water-permeable but sand-impermeable material of the rigid plate 1 and the soft cloth 3 allows water to flow through the rigid plate 1 and the soft cloth 3 of this device at lower tide levels, which also has a low impact on the tidal currents of the coastal mudflats, in line with the ecological concept.

[0061] In some optimized embodiments, when the device is installed on a coastal mudflat facing low tide or in a still water experimental environment, the float 2 is located at the top vertically of the device, the base box 4 is located at the bottom vertically of the device, and the rigid plate 1 and the soft cloth 3 are located in the middle vertically of the device, with the rigid plate 1 and the soft cloth 3 spaced apart at an angle. This clarifies the positional relationship of the components of the device, ensuring structural stability and functionality. The float 2 provides buoyancy, the base box 4 bears silt, and the rigid plate 1 and the soft cloth 3 cooperate to block water flow. It also clarifies the role of the components in different tidal directions, preventing silt from being lost to the sea and promoting land siltation.

[0062] Specifically, the front side of the soft cloth 3 (i.e. the side of the soft cloth 3 facing the land when it is raised) is the side of the soft cloth 3 that blocks the tidal flow; the buoyancy of the float 2 allows the rigid plate 1 to rotate flexibly to adapt to tidal changes, and the restrictive effect of the soft cloth 3 also ensures that the rigid plate 1 will not overturn and maintain the stability of the device.

[0063] In some embodiments, specifically, the buoyancy of the float 2 is slightly greater than the sum of the underwater weights of the rigid plate 1 and the soft cloth 3, preferably about 1.1 times the sum of the underwater weights of the rigid plate 1 and the soft cloth 3, so as to ensure that the rigid plate 1 and the soft cloth 3 can float under the buoyancy of the float 2, but not so much that the buoyancy is too large that after the rigid plate 1 floats up, a large water flow impact force is required to make the rigid plate 1 rotate downward and close towards the top surface of the base box 4.

[0064] In some embodiments, specifically, the side length of the soft cloth 3 connecting the base box 4 and the rigid plate 1 allows the rigid plate 1 to rotate at a maximum angle between 60 and 90 degrees under the buoyancy of the float 2. If the angle is too small, the height of the rigid plate 1 after floating will be reduced, affecting the siltation effect. By clearly defining the positional relationship between the float 2, the base box 4, the rigid plate 1, and the soft cloth 3, the stability of the device in a low-tide environment is ensured. The angled, spaced-apart design of the rigid plate 1 and the soft cloth 3 helps to regulate water flow (e.g., Figure 5 (As shown).

[0065] In some embodiments, specifically, the other side of the soft cloth 3 is the same length as the long side of the base box 4.

[0066] In some embodiments, specifically, the end of the rigid plate 1, the end of the soft cloth 3, and the end plate of the foundation box 4 are sealed with end cloth. The end cloth is triangular, and the length of the three sides of the end cloth is the same as the length of the end of the rigid plate 1, the end of the soft cloth 3, and the end plate of the foundation box 4 connected to it. The end cloth can prevent mud and sand from entering from the end and accumulating on the top of the foundation box 4, which would affect the downward closing of the rigid plate 1.

[0067] More specifically, the long sides of the rigid board 1, the soft cloth 3, and the base box 4 are of equal length. The triangular end face formed between the short side of the rigid board 1, the short side of the soft cloth 3, and the top edge of the end plate of the base box 4 is sealed by the end cloth. The end cloth is triangular, and the lengths of the three sides of the end cloth are equal to the lengths of the end of the rigid board 1, the end of the soft cloth 3, and the top edge of the end plate of the base box 4.

[0068] In some embodiments, specifically, both the rigid plate 1 and the soft cloth 3 are made of a material that is permeable to water but not to silt. For example, the soft cloth 3 can be made of reinforced filter cloth, and the rigid plate 1 can be made of a lightweight rigid plate 1 with several holes and covered with filter cloth. At lower tide levels, this can minimize the impact of the device on water flow while effectively intercepting silt, thereby improving the siltation efficiency. The soft cloth 3 has high toughness and corrosion resistance, ensuring the durability of the device, enabling it to adapt to harsh environments, and reducing maintenance costs and replacement frequency. The rigid plate 1 has a lightweight structure, making it easy to transport and install, thereby reducing construction difficulty and cost, improving work efficiency, and making it suitable for large-scale deployment.

[0069] In some embodiments, specifically, the end fabric is made of the same material as the soft fabric 3.

[0070] In some embodiments, the soft cloth 3 is specifically connected to the side panel of the base box 4 by stitching, and the stitching is performed on-site after the base box 4 located in the installation groove is filled with mud and sand.

[0071] In some embodiments, specifically, the foundation box 4 can be made of geosynthetic board, which is cheaper than the prior art; the rigid board 1 is a board that is permeable to water but not to mud and sand, and can be made by making a lightweight rigid board 1 with several holes and covering it with filter cloth; the soft cloth 3 is made of a material that is permeable to water but not to mud and sand, such as the soft cloth 3 being a reinforced filter cloth.

[0072] In some embodiments, specifically, the connection between one side of the soft cloth 3 (the first side of the soft cloth 3) and the opposite side plate of the foundation box 4 (the second side plate) is made by sewing, and the sewing is performed on site after the foundation box 4 is filled with mud and sand.

[0073] Specifically, the angle between the rigid plate 1 and the soft cloth 3 can be adjusted according to actual needs. The adjustable angle design allows the device to adapt to different water flow speeds and directions after installation, optimizing the flow path of sediment and improving siltation efficiency.

[0074] Example 2

[0075] Example 2 is an optimized design of any one of the technical solutions in Example 1;

[0076] The basic box 4 includes a rear side panel 46, a front side panel 41, a left side panel 42, a right side panel 43, and a bottom panel 44.

[0077] Example 3

[0078] Based on other technical solutions in Embodiment 2 or Embodiment 3, the bottom edge of the rigid plate 1 is connected to the top edge of the front side plate 41 of the box in a swingable hinge or flexible connection, so that the rigid plate 1 swings around the top edge of the front side plate 41 of the box.

[0079] Based on other technical solutions in Embodiment 2 or Embodiment 3, the bottom edge of the soft cloth 3 is stitched to the top edge of the rear side panel 46 of the box after the device is installed on the coastal mudflat (installation groove).

[0080] Based on other technical solutions in Embodiment 2 or Embodiment 3, the device is optimized so that when it is installed on the coastal mudflat and facing the receding tide or in a still water test environment, under the buoyancy of the float 2, the rigid plate 1 rotates and flips around the top edge of the front side plate 41 of the box and is restricted by the soft cloth 3, so that the angle between the rigid plate 1 and the virtual top surface of the base box 4 does not exceed 90 degrees.

[0081] Based on other technical solutions in Embodiment 1, Embodiment 2, or Embodiment 3, optimizations are made so that when the device is not installed on the coastal mudflat, the left side of the soft cloth 3 is connected to the left side of the base box 4, and the right side of the soft cloth 3 is connected to the right side of the base box 4.

[0082] Based on other technical solutions in Embodiment 1, Embodiment 2, or Embodiment 3, optimizations are made. When the device is installed on a coastal mudflat facing low tide or in a still water experimental environment, and the rigid plate 1 and the soft cloth 3 are spread apart at an angle, the rigid plate 1 and the soft cloth 3 are set in an inverted V-shape, a V-shaped upward mirror image, an inverted γ-shape, a V-shaped upward mirror image, an inverted レ-shape, a V-shaped upward mirror image, or a shape like a canopy tent. This is suitable for different terrains and tidal conditions, optimizes the flow path of water and sediment, and improves siltation efficiency.

[0083] Based on other technical solutions in Embodiment 1, Embodiment 2, or Embodiment 3, the rigid plate 1 and the soft cloth 3 are both rectangular; the rectangular design makes the device more compact, saves space, facilitates processing and installation, and improves construction efficiency.

[0084] Based on other technical solutions in Embodiment 1, Embodiment 2, or Embodiment 3, the base box 4 is provided with several partitions 45; the partitions 45 can enhance the stability of the base box 4 and may achieve more efficient siltation control; optimizedly, each partition 45 is vertically spaced within the base box 4, dividing the base box 4 into two or more sand storage chambers.

[0085] Example 4

[0086] This embodiment proposes an operational method for using the coastal mudflat siltation promoting device described in any of the technical solutions in Embodiment 1, Embodiment 2, or Embodiment 3 above. The method includes the following steps:

[0087] S1, when the coastal mudflats are exposed at low tide, transport the device to the target coastal mudflats; then execute S2;

[0088] S2, determine the orientation of the device so that it extends along the coastline and ensure that the side plate of the base box 4 connected to one side of the rigid plate 1 is located on the sea side; then execute S3;

[0089] S3. Excavate an installation trench on the coastal mudflats. The depth of the installation trench is the same as the height of the foundation box 4. Place the device into the installation trench and fix it in place so that the device is at the same height as the coastal mudflats after installation (this also reduces the interference with the local ecological environment, meets environmental protection requirements, and is suitable for use in sensitive areas); then proceed to S4.

[0090] S4, flip up the hard plate 1, and fill the mud and sand excavated from the excavation and installation trench into the foundation box 4 through the unstitched gap between the bottom edge of the soft cloth 3 and the top edge of the side plate of the foundation box 4 facing the land. Then (after the foundation box 4 is filled with mud and sand), close or sew the gap between the bottom edge of the soft cloth 3 and the top edge of the side plate of the foundation box 4 facing the land.

[0091] In S1, the transfer was carried out at low tide to ensure smooth construction and not affect the structural integrity of the equipment; construction at low tide can avoid the impact of seawater on the construction process, while ensuring the safe transportation and placement of the equipment.

[0092] In S2, the device needs to extend along the coastline, and the part where the base box 4 is connected to the rigid plate 1 should be set on the side closer to the sea to ensure that the device can effectively intercept mud and sand from the ocean.

[0093] In S3 and S4, in order to ensure that the device can be placed stably on the coastal mudflats and avoid being washed away by tides or waves, it is necessary to fix the device by installing a trench and backfilling with silt to ensure its long-term stability, thereby making siltation operations more effective. This reasonable layout can maximize the device's silt interception efficiency while reducing environmental impact. Filling with silt helps to fix the device and provides a foundation for subsequent siltation. The adjustment and filling process can ensure the stability of the device and create good initial conditions for siltation operations.

[0094] Preferably, in S3, the virtual top surface of the base box 4 of this device is installed at the same height as the coastline. When the coastal mudflats are exposed at low tide, the rigid plate 1 closes and covers the base box 4, without any structure protruding from the coastal mudflat surface, thus having a very low impact on the ecological environment of the coastal mudflats.

[0095] Furthermore, the method also includes the following steps:

[0096] S5, executed after S4, involves the rigid plate 1 being tilted down when the tidal current flows inland, allowing water to carry sediment smoothly through and deposit it on the land side; when the tidal current flows seaward, the rigid plate 1, under the constraint of the soft cloth 3, rotates to a maximum of 90 degrees to an upright state or is tilted up, thereby effectively intercepting sediment to prevent it from being lost into the sea; then the device installed at this time is used to repeatedly promote sedimentation and interception until the required sedimentation height is reached; then S6 is executed.

[0097] S6. To further increase the siltation height, the next device will be installed again based on S1-S5 on the already silted coastal mudflats, and the siltation interception will be carried out repeatedly using the next device.

[0098] In S5, the natural tidal forces drive the deposition of sediment, which is not only efficient but also environmentally friendly.

[0099] In S6, by repeatedly performing siltation-promoting and interception, changes in tides or other environmental factors can be addressed to ensure maximum siltation efficiency.

[0100] Steps S1-S6 ensure that the construction process is clear and feasible, reduce potential problems, improve the success rate, make full use of on-site mud and sand, reduce additional material requirements, lower costs, and ensure that the device effectively intercepts sediment.

[0101] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A coastal mudflat siltation device, comprising a base box for installation in an installation trench excavated on the coastal mudflat, characterized in that, It also includes a rigid plate, a soft cloth, and a float; the base box is elongated; one side of the rigid plate is connected to the first top edge of one side plate of the base box, and the rigid plate can rotate around the first top edge, and the other two sides of the rigid plate are fixedly connected to the float; one side of the soft cloth is connected to the second top edge of the opposite side plate of the base box, and the other two sides of the soft cloth are connected to the fixed joint between the rigid plate and the float; when the device is installed on a coastal mudflat facing low tide or in a still water test environment, under the buoyancy of the float, the rigid plate rotates and flips up around the first top edge, and the soft cloth is pulled up and raised; when the device is installed on a coastal mudflat facing high tide, the rigid plate flips down and closes towards the virtual top surface of the base box under the impact force of the high tide water flow; the soft cloth is used to limit the maximum angle of rotation of the rigid plate under the buoyancy of the float to no more than 90 degrees.

2. The coastal tidal flat siltation device according to claim 1, characterized in that, One side of the rigid plate is hinged or flexibly connected to the first top edge of one side plate of the foundation box.

3. The coastal tidal flat siltation device according to claim 1, characterized in that, The two sides of the soft cloth are directly connected to the two sides of the base box, respectively; or the left side of the soft cloth is connected to the left side of the base box through an intermediate connector, and the right side of the soft cloth is connected to the right side of the base box through another intermediate connector.

4. The coastal tidal flat siltation device according to claim 3, characterized in that, One of the intermediate connecting pieces is the left end fabric, and the other intermediate connecting piece is the right end fabric; Both the left and right end fabrics are used to seal or allow water to pass through the sides of the base box and the combination of rigid board and soft fabric.

5. The coastal tidal flat siltation device according to claim 4, characterized in that, Both the left and right ends of the fabric are triangular.

6. The coastal mudflat siltation device according to claim 1, characterized in that, Both the hardboard and the soft cloth are made of a material that is permeable to water but not to mud and sand.

7. The coastal mudflat siltation device according to claim 1, characterized in that, When the device is installed on a coastal mudflat facing low tide or in a still water test environment, the float is located at the top of the device, the base box is located at the bottom of the device, and the rigid plate and soft cloth are located in the middle of the device, with the rigid plate and soft cloth spaced apart at an angle.

8. The coastal mudflat siltation device according to any one of claims 1-7, characterized in that, The basic box body includes a rear side panel, a front side panel, a left side panel, a right side panel, and a bottom panel; The bottom edge of the rigid plate is hinged or flexibly connected to the top edge of the front side panel of the box, so that the rigid plate can swing around the top edge of the front side panel of the box. When the device is installed on the coastal mudflats, the bottom edge of the soft cloth is sewn together with the top edge of the rear side panel of the box. When the device is installed on a coastal mudflat facing low tide or in a still water test environment, under the buoyancy of the float, the rigid plate rotates and flips up around the top edge of the front side plate of the box and is restricted by the soft cloth, so that the angle between the rigid plate and the virtual top surface of the base box does not exceed 90 degrees. When the device is not installed on the coastal mudflat, the left side of the soft cloth is connected to the left side of the base box, and the right side of the soft cloth is connected to the right side of the base box. When the device is installed on a coastal mudflat facing low tide or in a still water experimental environment, and the rigid board and soft cloth are spread apart at an angle, the rigid board and soft cloth are set up in an inverted V shape, a V-shaped upward mirror shape, an inverted γ shape, a γ-shaped upward mirror shape, an inverted レ shape, a レ-shaped upward mirror shape, or a shape like a canopy tent. Both the rigid board and the soft cloth are rectangular; The basic box contains several partitions.

9. A method for operating a coastal mudflat siltation device as described in any one of claims 1-8, characterized in that, The method includes the following steps: S1, when the coastal mudflats are exposed at low tide, transport the device to the target coastal mudflats; S2, determine the orientation of the device so that it extends along the coastline and ensure that the side plate of the base box connected to one side of the rigid plate is located on the sea side. S3. Excavate an installation trench on the coastal mudflat. The depth of the installation trench is the same as the height of the foundation box. Place the device into the installation trench and fix it so that the device is at the same height as the coastal mudflat after installation. S4, flip up the hard board, and fill the mud and sand excavated from the excavation and installation trench into the foundation box through the unstitched gap between the bottom edge of the soft cloth and the top edge of the side plate of the foundation box facing the land area. Then, close or sew the gap between the bottom edge of the soft cloth and the top edge of the side plate of the foundation box facing the land area.

10. The method according to claim 9, characterized in that, The method also includes the following steps: S5, when the tide flows inland, the rigid plate is in a tilted state, allowing the water flow to carry sediment smoothly through and deposit on the land side; when the tide flows outward, the rigid plate, under the restriction of the soft cloth, can rotate up to 90 degrees to an upright state or be in a tilted state, thereby effectively intercepting sediment to prevent it from being lost into the sea; then the device installed at this time is used to repeatedly promote sedimentation and interception until the required sedimentation height is reached; S6. To further increase the siltation height, the next device will be installed again based on S1-S5 on the already silted coastal mudflats, and the siltation interception will be carried out repeatedly using the next device.

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