Method and system for comprehensively treating spartina alterniflora through photovoltaic shading and cofferdam flooding

Abstract

The invention discloses a method and a system for comprehensively treating spartina alterniflora through photovoltaic shading and cofferdam flooding. The method comprises the following steps: cutting the overground part of the spartina alterniflora in a to-be-treated area; a cofferdam is built around the periphery of the to-be-treated area, water is injected into the to-be-treated area with the built cofferdam, the treatment area is submerged, and the set first water level depth is met; a photovoltaic power generation array is integrally arranged in the cofferdam area, so that power generation is achieved, underground rhizomes of the spartina alterniflora are shaded, and photosynthesis of the spartina alterniflora is blocked; setting a second water level depth, and monitoring the water level condition in real time based on the second water level depth so as to block the respiration of the underground rhizomes of the spartina alterniflora; and after a plurality of time, sampling and observing the underground rhizomes of the spartina alterniflora to confirm that the rhizomes lose the asexual reproduction capability, thereby finishing the treatment. According to the method, two treatment modes are combined, so that the problems of narrow financing channel and huge investment of pure ecological treatment are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of ecological environment engineering, and particularly relates to a method and system for comprehensively treating Spartina alterniflora by photovoltaic shading and cofferdam flooding. Background Art

[0002] Spartina alterniflora is a tall herbaceous plant native to the temperate coast of the Americas. It grows in the intertidal zone, with plants being salt-tolerant and flood-tolerant, resistant to wind and waves, and its seeds can be spread by wind and waves. Its strong salt tolerance and salt-secreting function enable it to tolerate seawater immersion for a long time, making it one of the terrestrial plants closest to the sea. Its stems are very hard, which can dissipate hydrodynamic forces, reduce tidal current velocity and withstand a certain height of sea waves. At the same time, its underground rhizomes are well-developed, which can promote the rapid sedimentation and siltation of sediment. It is precisely this function of "preventing waves and stabilizing dikes, promoting siltation and creating land" that has led humans to introduce it as an "engineering plant" to coastal tidal flats everywhere. Spartina alterniflora was introduced into China in 1979 and is now mainly distributed in provinces such as Shanghai, Zhejiang, Fujian, and Guangdong in China. The population of Spartina alterniflora has expanded rapidly in China, ranging from Tangshan in Hebei in the north to Beihai in Guangxi in the south, with a total area exceeding 54,500 hectares.

[0003] However, since Spartina alterniflora can reproduce through rhizomes and seeds, it grows rapidly. The large-scale planting of Spartina alterniflora has changed the habitat of benthic animals, resulting in a decline in the population density of beach shellfish, occupied the living space of native plants such as mangroves, and also affected the foraging and resting of migratory and wintering birds, threatening the native coastal ecosystem; at the same time, due to the large-scale occupation of tidal flats by Spartina alterniflora, it has damaged the habitat of nearshore organisms, restricted the healthy development of nearshore tidal flat aquaculture; blocked waterways and affected the departure of ships; affected the seawater exchange capacity, resulting in a decline in water quality and inducing red tides. Spartina alterniflora has been listed in the list of the world's 100 most dangerous invasive species.

[0004] In the prior art, the treatment of Spartina alterniflora has been carried out for up to ten years. Relevant coastal provinces have tried various treatment methods such as physical, chemical, biological substitution and comprehensive prevention and control, and have obtained some experiences that can be learned and promoted. Currently, the treatment methods are mainly manual and mechanical removal and herbicide eradication. However, the treatment effect is not good, mainly because the investment is huge, the mechanical method cannot eradicate it completely, the chemical method pollutes the environment, and the biological substitution method has a long cycle. Summary of the Invention

[0005] To solve the above technical problems, the present invention proposes a method and system for comprehensively treating Spartina alterniflora by photovoltaic shading and cofferdam flooding to solve the problems existing in the above prior art.

[0006] To achieve the above object, in the first aspect, the present invention provides a method for comprehensively treating Spartina alterniflora by photovoltaic shading and cofferdam flooding, including:

[0007] Mow the aboveground part of Spartina alterniflora in the treatment area;

[0008] Build a cofferdam around the periphery of the treatment area to be treated, inject water into the treatment area with the cofferdam built, flood the treatment area, and meet the set first water level depth;

[0009] Overall arrange a photovoltaic power generation array in the cofferdam area to generate electricity and shade the underground rhizomes of Spartina alterniflora, blocking its photosynthesis;

[0010] Set the second water level depth, and monitor the water level situation in real time based on the second water level depth to block the respiration of the underground rhizomes of Spartina alterniflora;

[0011] After a certain period of time, sample and observe the underground rhizomes of Spartina alterniflora, confirm that it has lost the ability of asexual reproduction, and complete the treatment.

[0012] Preferably, the method further includes:

[0013] Obtain a new treatment area to be treated, and mow the aboveground part of Spartina alterniflora in the new treatment area;

[0014] Build a cofferdam around the periphery of the new treatment area to be treated;

[0015] Set a water channel between the cofferdam of the new treatment area to be treated and the cofferdam of the original treated area that has been treated to form a multi-cofferdam interconnected area;

[0016] Based on the first water level depth, inject water into the multi-cofferdam interconnected area to float the entire photovoltaic power generation array;

[0017] Based on the water channel, move the photovoltaic power generation array in the original treated area to the new treatment area to be treated;

[0018] Cut off the water channel from the original treated area to the new treatment area to be treated, and after draining the original treated area, incorporate it into the regular maintenance scope of coastal ecological protection.

[0019] Preferably, the first water level depth is greater than or equal to 1 meter to achieve the installation and commissioning of the photovoltaic power generation array.

[0020] Preferably, the second water level depth is greater than or equal to 0.2 meter, and the duration is 1 - 3 years.

[0021] Preferably, the time interval for the sampling and observation is 3 months to 1 year.

[0022] Preferably, the photovoltaic power generation array is a floating photovoltaic power generation array, or a fixed pile foundation type photovoltaic power generation array, or a thin film type photovoltaic power generation array.

[0023] In a second aspect, the present invention also provides a system for comprehensively treating Spartina alterniflora by photovoltaic shading and cofferdam flooding, including:

[0024] A photovoltaic power generation array is used to be arranged on the water surface of the area to be treated, so as to generate electricity and shade the underground rhizomes of Spartina alterniflora;

[0025] A cofferdam is used to be built around the perimeter of the area to be treated to form a closed cofferdam area;

[0026] A water channel is used to connect different cofferdam areas to enable the movement of the photovoltaic power generation array between different cofferdam areas.

[0027] Preferably, the system further includes a water level regulating device for regulating the water level in the cofferdam area according to a set water depth threshold.

[0028] Preferably, the system further includes a sampling and observation device for regularly checking the asexual reproduction ability of the rhizomes of Spartina alterniflora.

[0029] Preferably, the photovoltaic power generation array is a floating photovoltaic power generation array, or a fixed pile foundation type photovoltaic power generation array, or a thin film type photovoltaic power generation array.

[0030] Compared with the prior art, the present invention has the following advantages and technical effects:

[0031] The present invention provides a method for comprehensively treating Spartina alterniflora by photovoltaic shading and cofferdam flooding. First, the above-ground part of Spartina alterniflora in the area to be treated is mowed; secondly, a cofferdam is built around the perimeter of the area to be treated, and water is injected into the area to be treated with the built cofferdam to flood the treatment area and meet the set first water depth; then, a photovoltaic power generation array is integrally arranged in the cofferdam area to generate electricity and shade the underground rhizomes of Spartina alterniflora, blocking its photosynthesis; further, a second water depth is set, and the water level condition is monitored in real time based on the second water depth to block the respiration of the underground rhizomes of Spartina alterniflora; finally, after a certain period of time, the underground rhizomes of Spartina alterniflora are sampled and observed to confirm that it has lost its asexual reproduction ability, completing the treatment.

[0032] The present invention uses a photovoltaic power generation array to achieve the shading effect of the underground rhizomes of Spartina alterniflora, blocking its photosynthesis, and uses cofferdam flooding to provide conditions for the overall movement of the photovoltaic, while blocking the respiration of the underground rhizomes of Spartina alterniflora. By combining the two treatment methods, the problems of narrow financing channels and huge investment in pure ecological treatment are solved. In addition, while following the technical principle of Spartina alterniflora treatment, the photovoltaic can be well integrated into the treatment link, and the output benefit of photovoltaic power generation covers the input of ecological treatment. Description of the Drawings

[0033] The drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0034] Figure 1 This is the first method flowchart of the embodiment of the present invention;

[0035] Figure 2 This is the second method flowchart of the embodiment of the present invention;

[0036] Figure 3 This is the system schematic diagram of the embodiment of the present invention. Detailed implementation manners

[0037] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] It should be noted that the steps shown in the flowchart of the drawings may be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than here.

[0039] First, the technical terms involved in the following embodiments will be described below.

[0040] A photovoltaic generation system is a power generation system that uses the photovoltaic effect of photovoltaic cells to directly convert solar radiation energy into electrical energy. Such a system usually includes a photovoltaic array, a transformer, an inverter, and related auxiliary facilities.

[0041] Photovoltaic generation systems can be classified according to the application form, application scale, and type of load, and mainly include independent systems, grid-connected systems, and hybrid systems. Independent systems are usually used in areas without grid power supply, grid-connected systems can directly input power into the grid, and hybrid systems are a combination of the former two and are suitable for occasions that require stable power supply.

[0042] The core of a photovoltaic generation system lies in the photovoltaic effect of photovoltaic cells. This effect enables photovoltaic cells to generate voltage when exposed to light, thereby converting light energy into electrical energy. This conversion process is direct and efficient, making photovoltaic power generation an important way to utilize renewable energy.

[0043] In a complete photovoltaic generation system, the core component that determines the system efficiency is the photovoltaic module with photovoltaic conversion function, the important components that determine the long-term operation reliability of the photovoltaic module are support components such as brackets or floating bodies, and the components that make up a complete power transmission and transformation system also include AC and DC cables, inverters, transformers, booster stations, outgoing lines, etc. The photovoltaic referred to in this embodiment means a complete photovoltaic generation system including all the above components.

[0044] Regarding the method for controlling Spartina alterniflora, in one embodiment, the following treatment method can be adopted:

[0045] As an alternative treatment method, in this embodiment, stainless steel plates are used and welded into a steel body. Then, an excavator is used to dig a gully with a depth of 0.8 - 1 meter, and the steel body is directly placed into it to form a sealed cofferdam, thereby preventing or slowing down the infiltration of seawater. Valves are installed at the bottom or required parts of the cofferdam or small holes are reserved to ensure the water level inside the cofferdam and its connectivity with seawater: The ebb and flow of the tide are utilized to ensure the water level inside the cofferdam, and there is no need for additional manual replenishment of the water level inside the cofferdam, which is simple and convenient.

[0046] The above - mentioned scheme mainly achieves the eradication purpose by flooding with the cofferdam to prevent respiration and photosynthesis.

[0047] Problems and disadvantages of the above - mentioned scheme: The engineering investment for cofferdam construction is large, and the economic benefit is small; the recycled stainless steel plates are difficult to be reused again and can only be treated as scrap steel, resulting in a large loss. It is not practical.

[0048] As an alternative treatment method, in this embodiment, dikes perpendicular and parallel to the coastline are respectively built in the Spartina alterniflora control area. The dikes are connected to enclose the control area as a closed area. For the Spartina alterniflora within the area, its above - ground part is mowed in the late jointing stage. When the tide rises, the dikes store the tide water, forming a terraced enclosure flooding for the stubbles of Spartina alterniflora after mowing within the control area until no new Spartina alterniflora germinates, and then the dikes are removed to restore the natural beach environment. The method of the present invention is simple and easy to implement, the dikes have good water storage performance and strong applicability. It is applicable to both small - scale and large - scale Spartina alterniflora control. The control effect of Spartina alterniflora is good, the cost is relatively low, the impact on the environment is small, and it is easy to restore the beach ecological environment.

[0049] The above - mentioned scheme physically removes the above - ground part of Spartina alterniflora and uses the method of cofferdam flooding for the underground part to prevent respiration and photosynthesis to eradicate the underground part.

[0050] Problems and disadvantages of the above - mentioned scheme: The engineering investment for building a large - area cofferdam is large, the economic benefit is small, and it is not practical.

[0051] As an alternative treatment method, in this embodiment, in addition to shade nets, black PE plastic sheets, iron wires and bamboo, the bamboo is provided with a bottom layer and a top layer, bamboo columns are arranged between the bottom layer and the top layer, the bamboos are fixed with iron wires, and double - layer shade nets and black PE plastic sheets are installed between the bottom layer and the top layer.

[0052] The above - mentioned scheme adopts the method of overall covering to prevent Spartina alterniflora from carrying out photosynthesis, thereby achieving the eradication effect.

[0053] Problems and disadvantages of the above solution: The overall workload of covering is huge and the economic benefit is small; Recycling the mesh shading cover will generate solid waste, causing secondary pollution to the ecological environment. It lacks creativity and practicality.

[0054] As an alternative treatment method, in this embodiment, after Spartina alterniflora is mowed, a dike is built to flood the area to kill the plants; For the Suaeda salsa on the high-tide beach, restoration is carried out. Using the above-ground part of the Spartina alterniflora plants, the terrain is sorted and Suaeda salsa seeds are sown shallowly in the upper intertidal zone to create a micro-topography to intercept Suaeda salsa seeds; For the seagrass bed at low tide level, restoration is carried out to treat the degraded area of the seagrass bed on the low-tide beach; Juvenile benthic organisms are released for proliferation to restore benthic animals in the tidal flat; Through the mowing and flooding of Spartina alterniflora, the above-ground part of the plants can be utilized through the restoration of Suaeda salsa. After the restoration of Suaeda salsa on the high-tide beach and the seagrass bed at low tide level, benthic animals are restored to complete the three-dimensional restoration of the intertidal zone and restore the diversity of the intertidal zone.

[0055] The above solution uses a mechanical method to cut and remove the above-ground part of Spartina alterniflora and uses the method of cofferdam flooding to prevent respiration and photosynthesis to eradicate the underground part, taking into account the restoration of Suaeda salsa on the high-tide beach and the seagrass bed at low tide level.

[0056] Problems and disadvantages of the above solution: The project investment for eradicating Spartina alterniflora by mechanical method and treating it by cofferdam flooding is large and the economic benefit is small. It lacks practicality.

[0057] As an alternative treatment method, this embodiment includes a shading frame and a shading net. The shading frame includes multiple groups of vertical rods, a lower fixing frame, and an upper fixing frame. The lower fixing frame is fixed in the lower region of the vertical rods, and the upper fixing frame is fixed in the upper region of the vertical rods; The lower fixing frame is composed of multiple groups of horizontal crossbars and vertical crossbars that are horizontally fixed perpendicular to each other on each vertical rod. The upper fixing frame is composed of two groups of horizontal crossbars and two groups of vertical crossbars that are horizontally fixed perpendicular to each other on the outer peripheral vertical rods; Both ends of each group of shading nets are sleeved on adjacent rows of vertical rods, and laver rope strips are fixedly connected between the bottoms of the vertical rods; Compared with the prior art, the shading net of the present invention can be fixed and will not drift away with water, and has the function of inducing animal interference to inhibit the sexual and asexual reproductive growth of Spartina alterniflora.

[0058] The above solution uses the method of overall covering to prevent Spartina alterniflora from carrying out photosynthesis, thereby achieving the eradication effect.

[0059] Problems and disadvantages of the above solution: The overall workload of covering is huge and the economic benefit is small; Recycling the mesh shading cover will generate solid waste, causing secondary pollution to the ecological environment. It lacks creativity and practicality.

[0060] As an alternative treatment method, in this embodiment, Spartina alterniflora is covered with silver-black double-sided film 25 - 50 days before the flowering period and then recovered. The growth areas of Spartina alterniflora include tidal flat areas. The covering is carried out during the regreening season of Spartina alterniflora, not later than before the Spartina alterniflora blooms. When covering during the growing season, the height of Spartina alterniflora is cut to less than 20 cm. The control method for Spartina alterniflora provided by the present invention has the advantages of low manual labor intensity, low cost, convenience, practicality, a control effect of up to 100%, and complete recovery of the film without causing pollution problems, being friendly to the marine ecological environment. The application of the control method for Spartina alterniflora provided by the present invention in controlling Spartina alterniflora saves costs for the prevention and control of Spartina alterniflora, has excellent control effects, and is suitable for large-scale popularization and use.

[0061] The above-mentioned solution uses a mechanical method to cut and remove the above-ground part of Spartina alterniflora, and then uses a silver-black double-sided film covering method to prevent respiration and photosynthesis to eradicate the underground part.

[0062] Problems and disadvantages of the above-mentioned solution: The engineering investment for eradicating Spartina alterniflora by the mechanical method is large, and the economic benefit is small; recycling the net shading cover will generate solid waste, causing secondary pollution to the ecological environment. It is not practical.

[0063] As an alternative treatment method, this embodiment includes: (1) Mowing: Manually or mechanically mow Spartina alterniflora, leaving a stubble less than 5 cm; (2) Ground-covering shading: Fix a net shading cover on the mowed area to make the net shading cover close to the ground; (3) Inspecting root death: Open part of the net shading cover, dig out the root system of Spartina alterniflora, and confirm the death of the root system; (4) Recycling the net shading cover: Recycle the above-mentioned net shading cover; (5) Restoring the beach: After natural seawater scouring, restore it to a clean beach. The method of the present invention has the remarkable effects of low cost, quick results, strong restoration purpose, and no pollution to the environment.

[0064] The above-mentioned solution uses a mechanical method to cut and remove the above-ground part of Spartina alterniflora, and then uses a net shading cover to prevent respiration and photosynthesis to eradicate the underground part.

[0065] Problems and disadvantages of the above-mentioned solution: The engineering investment for eradicating Spartina alterniflora by the mechanical method is large, and the economic benefit is small; recycling the net shading cover will generate solid waste, causing secondary pollution to the ecological environment. It is not practical.

[0066] As an alternative treatment method, in this embodiment, by organically combining excavation, site treatment, and biological substitution and promoting and coordinating with each other, the purpose of comprehensively controlling Spartina alterniflora is achieved. The present invention provides a scientific, reasonable, and highly operable method for the systematic control of Spartina alterniflora. This method can not only completely remove and inhibit Spartina alterniflora, but also has good persistence.

[0067] The above-mentioned solution combines mechanical excavation, ploughing, soaking, shading, and species replacement for the control of Spartina alterniflora.

[0068] Problems and disadvantages of the above-mentioned solution: large project investment, long treatment cycle, and small economic benefits. It is not practical.

[0069] As an alternative treatment method, this embodiment includes an outer earth embankment and an inner earth embankment arranged from the outside to the inside on the tidal flat. A shellfish breeding pond is formed between the outer earth embankment and the inner earth embankment. The bottom of the shellfish breeding pond is successively an anti-seepage film layer, a pebble layer, and a tidal flat layer from bottom to top. By adding an outer earth embankment and an inner earth embankment on the existing tidal flat and transforming it into a shellfish breeding pond between the two earth embankments, when the tide rushes into the shellfish breeding pond and is blocked by the outer earth embankment, the Spartina alterniflora area in the shellfish breeding pond is always filled with water. At the same time, the pebble layer and the anti-seepage film layer at the bottom of the shellfish breeding pond can slow down the water penetration in the shellfish breeding pond, greatly increasing the water storage capacity in the shellfish breeding pond. Since there is always water in the breeding pond, it inhibits the growth space of Spartina alterniflora and prevents the growth of Spartina alterniflora.

[0070] The above-mentioned solution adopts the method of building dikes for aquaculture to ensure that the Spartina alterniflora area is always filled with water, thereby inhibiting the growth space of Spartina alterniflora.

[0071] Problems and disadvantages of the above-mentioned solution: large investment in dike construction projects; the presence of water in the pond cannot prevent the survival of the already grown Spartina alterniflora; it cannot prevent spread. It is not practical.

[0072] As an alternative treatment method, this embodiment makes up for the deficiencies of existing prevention and control technologies, uses a comprehensive control method of mowing and water level regulation, inhibits the growth of Spartina alterniflora, eradicates the invasive population and controls its growth and rapid spread, and plays a positive role in repairing the large-area damaged ecosystem, providing an effective way for large-scale prevention and control of Spartina alterniflora spread in coastal areas.

[0073] The above-mentioned solution conducts physical removal treatment on the above-ground part of Spartina alterniflora and uses the method of cofferdam flooding for the underground part to prevent respiration and photosynthesis to eradicate the underground part.

[0074] Problems and disadvantages of the above-mentioned solution: large investment in building large-area cofferdams, small economic benefits, and not practical.

[0075] In summary, in the above optional treatment methods, the above-ground part is mechanically removed by methods such as mowing during the flowering period to the early booting stage, so that it cannot produce mature seeds, thereby preventing Spartina alterniflora from sexually reproducing and spreading over long distances through seeds; this part of the operation is relatively simple, with relatively low investment and direct effects. For the underground part, methods such as flooding and shading are used to prevent respiration and photosynthesis to prevent asexual reproduction; there is also the method of plowing to eliminate rhizomes. The operation volume of the flooding method is relatively simple, but a large number of cofferdams need to be constructed and continuous water level management operations are required. Without other sources of economic benefits, continuous investment in treatment costs will bring greater financial pressure.

[0076] In view of the deficiencies of the above treatment methods, this embodiment provides a method for comprehensively treating Spartina alterniflora by photovoltaic shading and cofferdam flooding, as Figure 1 shown, including:

[0077] S1. Mow the above-ground part of Spartina alterniflora in the area to be treated;

[0078] S2. Build a cofferdam around the perimeter of the area to be treated, inject water into the area to be treated with the built cofferdam, flood the treatment area, and meet the set first water level depth;

[0079] S3. Arrange a photovoltaic power generation array as a whole in the cofferdam area to generate electricity and shade the underground rhizomes of Spartina alterniflora, blocking its photosynthesis;

[0080] S4. Set the second water level depth, and monitor the water level situation in real time based on the second water level depth to block the respiration of the underground rhizomes of Spartina alterniflora;

[0081] S5. After a certain period of time, sample and observe the underground rhizomes of Spartina alterniflora, confirm that it has lost the ability of asexual reproduction, and complete the treatment.

[0082] This embodiment also provides a method for comprehensively treating Spartina alterniflora by photovoltaic shading and cofferdam flooding, as Figure 2 shown, including:

[0083] S1. Mow the above-ground part of Spartina alterniflora in the area to be treated;

[0084] S2. Build a cofferdam around the perimeter of the area to be treated, inject water into the area to be treated with the built cofferdam, flood the treatment area, and meet the set first water level depth;

[0085] S3. Arrange a photovoltaic power generation array as a whole in the cofferdam area to generate electricity and shade the underground rhizomes of Spartina alterniflora, blocking its photosynthesis;

[0086] S4. Set the second water level depth, and monitor the water level situation in real time based on the second water level depth to block the respiration of the underground rhizomes of Spartina alterniflora;

[0087] S5. After a certain period of time, samples of the underground rhizomes of Spartina alterniflora are taken for observation to confirm that it has lost its asexual reproduction ability, and the treatment is completed.

[0088] S6. Obtain a new area to be treated, and mow the above-ground part of Spartina alterniflora in the new area to be treated;

[0089] S7. Build a cofferdam around the perimeter of the new area to be treated;

[0090] S8. Set up a water channel between the cofferdam of the new area to be treated and the cofferdam of the original treated area that has been completed, to form a multi-cofferdam interconnected area;

[0091] S9. Based on the first water level depth, inject water into the multi-cofferdam interconnected area to make the entire photovoltaic power generation array float;

[0092] S10. Based on the water channel, move the photovoltaic power generation array in the original treated area to the new area to be treated;

[0093] S11. Cut off the water channel from the original treated area to the new area to be treated, and after draining the original treated area, incorporate it into the regular maintenance scope of coastal ecological protection.

[0094] Further, the first water level depth is greater than or equal to 1 meter to enable the installation and commissioning of the photovoltaic power generation array.

[0095] Further, the second water level depth is greater than or equal to 0.2 meter, and the duration is 1 - 3 years.

[0096] Further, the time interval for the sampling observation is 3 months to 1 year.

[0097] Further, the photovoltaic power generation array is a floating photovoltaic power generation array, or a fixed pile foundation type photovoltaic power generation array, or a thin-film type photovoltaic power generation array.

[0098] In this embodiment, if a fixed pile foundation type photovoltaic power generation array is used, it needs to be completely demolished instead of being moved as a whole after the treatment is completed. If a thin-film type photovoltaic power generation array is used, it needs to be completely recycled after the treatment is completed.

[0099] The innovative technologies in this embodiment mainly include:

[0100] Innovative technology one: In the treatment measures for the underground part of Spartina alterniflora, the photovoltaic power generation array is used to achieve the shading effect and block photosynthesis, and the cofferdam is used to flood the area to block respiration. By combining these two treatment methods, the rapid reproduction and growth of Spartina alterniflora are controlled.

[0101] Innovative technology two uses the method of injecting water into the cofferdams and the waterways between the cofferdams as a whole to provide operating conditions for the overall floating and overall movement of the photovoltaic power generation array between different regions.

[0102] Embodiment Two

[0103] Based on the same inventive concept, as Figure 3 shown, this embodiment also provides a system for comprehensively treating Spartina alterniflora by photovoltaic shading and cofferdam flooding, including:

[0104] A photovoltaic power generation array, which is arranged on the water surface of the area to be treated to realize power generation and shade the underground rhizomes of Spartina alterniflora;

[0105] Cofferdams, which are built around the perimeter of the area to be treated to form a closed cofferdam area;

[0106] Waterways, which are used to connect different cofferdam areas to enable the photovoltaic power generation array to move between different cofferdam areas;

[0107] A water level regulating device, which is used to regulate the water level in the cofferdam area according to the set water depth threshold.

[0108] A sampling and observation device, which is used to regularly check the asexual reproduction ability of Spartina alterniflora rhizomes.

[0109] Furthermore, the photovoltaic power generation array is a floating photovoltaic power generation array, or a fixed pile foundation type photovoltaic power generation array, or a thin film type photovoltaic power generation array.

[0110] The system for comprehensively treating Spartina alterniflora by photovoltaic shading and cofferdam flooding provided in this embodiment has all the advantages of the method for comprehensively treating Spartina alterniflora by photovoltaic shading and cofferdam flooding provided in Embodiment One.

[0111] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for comprehensive management of Spartina alterniflora by photovoltaic shading and cofferdam flooding, characterized in that: The following steps are involved: Mowing the aboveground part of Spartina alterniflora in the treated area; Building a cofferdam around the area to be treated, and injecting water into the area to be treated with the cofferdam built, so as to submerge the treated area and meet the set first water level depth; Photovoltaic power generation arrays are arranged in the cofferdam area to generate electricity and shade the underground rhizomes of Spartina alterniflora, blocking its photosynthesis; Setting a second water level depth, and monitoring the water level in real time based on the second water level depth to block the respiration of the underground rhizomes of Spartina alterniflora; After some time, the underground rhizomes of Spartina alterniflora were sampled and observed to confirm that it had lost its asexual reproduction ability, and the treatment was completed.

2. The method according to claim 1, characterized in that Also includes: Acquire a new area to be treated, and mow the aboveground part of the flower-protecting grass in the new area to be treated; Constructing a cofferdam around the new area to be treated; A waterway is set up between the cofferdam of the new area to be treated and the cofferdam of the original treated area where treatment has been completed, so as to form a multi-cofferdam interconnection area; Based on the first water level depth, injecting water into the multi-cofferdam interconnection area to float the photovoltaic power generation array as a whole; Based on the waterway, the photovoltaic power generation array in the original treatment area is moved to the new treatment area; The waterway leading from the original treatment area to the new treatment area is cut off, and after the original treatment area is drained, it will be included in the routine maintenance scope of coastal ecological protection.

3. The method according to claim 1, characterized in that The first water level depth is greater than or equal to 1 meter to achieve installation and commissioning of the photovoltaic power generation array.

4. The method according to claim 1, characterized in that: The second water level has a depth greater than or equal to 0.2 meters and lasts for 1 to 3 years.

5. The method according to claim 1, characterized in that The sampling observation interval is 3 months to 1 year.

6. The method according to claim 1, characterized in that The photovoltaic power generation array is a floating photovoltaic power generation array, or a fixed pile-based photovoltaic power generation array, or a thin-film photovoltaic power generation array.

7. A system for comprehensive management of Spartina alterniflora by photovoltaic shading and cofferdam flooding, characterized in that: include: Photovoltaic power generation arrays are arranged on the water surface of the area to be treated to generate electricity and shade the underground rhizomes of Spartina alterniflora; Cofferdams are used to build around the area to be treated to form a closed cofferdam area; The waterway is used to connect different cofferdam areas to enable the photovoltaic power generation array to move between different cofferdam areas.

8. The system according to claim 7, characterized in that It also includes a water level regulating device for regulating the water level in the cofferdam area according to a set water level depth threshold.

9. The system according to claim 7, characterized in that It also includes a sampling observation device for regularly checking the asexual reproduction ability of the rhizomes of Spartina alterniflora.

10. The system according to claim 7, characterized in that The photovoltaic power generation array is a floating photovoltaic power generation array, or a fixed pile-based photovoltaic power generation array, or a thin-film photovoltaic power generation array.

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