Comprehensive protection system for wind and sand hazard area of oasis edge of Qaidam basin

Abstract

The utility model provides a comprehensive protection system for a wind and sand hazard area at an oasis edge of a Qaidam basin, which relates to the field of environmental governance and comprises a mixed sand stabilization belt, a sand sealing and grass raising belt and a mixed forest and grass belt which are sequentially arranged in the main wind direction. The mixed sand stabilization belt is positioned behind the main wind direction; the mixed forest and grass belt comprises vertical sand barriers and sand stabilization plants; the vertical sand barrier comprises a framework and a net body unit, the framework is used for being fixed to the ground surface, the net body unit and the framework are matched in a sliding mode in the height direction of the framework, the framework and the net body unit are matched to define a protection area, and sand fixing plants are planted in the protection area. The protection system is good in sand blocking and fixing effect and beneficial to desertification environment treatment.

Description

Technical Field

[0001] The utility model relates to the field of environmental management, and in particular to a comprehensive protection system for wind and sand hazard areas at the edge of an oasis in the Qaidam Basin. Background Art

[0002] The Qaidam Basin Desert, located in northwestern Qinghai Province, is my country's highest desert. While rich in natural resources, the basin also faces severe challenges from wind-induced sandstorms. The oasis margins of the Qaidam Basin, particularly those bordering the desert and semi-desert, are particularly vulnerable to wind-induced sandstorms. This sandstorm hazard is closely linked to factors such as climate, low vegetation cover, and wind erosion. At the oasis margins, low vegetation cover and the arid climate create loose soils, making wind-induced sandstorms highly susceptible to soil and vegetation damage. Strong winds and heavy dust storms in spring and autumn are peak seasons for wind-induced sandstorms, severely impacting oasis agricultural production and placing significant pressure on the regional ecosystem. Sandstorms not only reduce arable land but also lead to soil erosion, which in turn affects groundwater recharge, creating a vicious cycle that negatively impacts the local ecological environment. To address this issue, wind-induced sandstorm prevention efforts in the Qaidam Basin are crucial.

[0003] While the overall sandstorm threat is severe on the edge of the Qaidam Basin oasis, there are still pockets of relatively mild damage. These areas often have certain natural protection advantages, such as relatively good vegetation cover, complex terrain, or protective measures such as windbreaks. While this has mitigated the impact of sandstorms to some extent, there are still limitations. Afforestation alone cannot fully address extreme sandstorms, and the construction of wind and sand barriers requires long-term maintenance and management. Furthermore, the scope and effectiveness of these measures are limited by specific geographical conditions and climate change.

[0004] In summary, the complexity and severity of wind and sand hazards in the oasis margins of the Qaidam Basin require more comprehensive and systematic measures for sandstorm prevention. Although existing traditional protection measures have alleviated the sandstorm problem to a certain extent, the increasingly severe trend of wind and sand hazards urgently requires innovative protection systems. Utility Model Content

[0005] The purpose of the utility model includes, for example, providing a comprehensive protection system for areas with relatively weak wind and sand hazards, which can construct a multi-level comprehensive protection system for areas with relatively weak wind and sand hazards on the edge of the oasis in the Qaidam Basin. It can not only effectively increase the ability to resist wind and sand, but also improve the ecological environment and protect the sustainable development of the oasis. It has important guiding and practical significance for preventing and controlling sand in western my country, curbing regional ecological environment degradation, and building a stable regional development ecological security barrier.

[0006] The embodiment of the present utility model can be implemented as follows:

[0007] In a first aspect, the utility model provides a comprehensive protection system for wind and sand hazard areas at the edge of the oasis in the Qaidam Basin, comprising:

[0008] A mixed sand-fixing belt, a sand-sealing and grass-cultivating belt, and a mixed forest-grass belt are arranged in sequence in the main wind direction, wherein the mixed sand-fixing belt is located behind the main wind direction; the mixed forest-grass belt includes vertical sand barriers and sand-fixing plants; the vertical sand barriers include a skeleton and a mesh unit, wherein the skeleton is used to be fixed to the ground surface, and the mesh unit and the skeleton are slidably matched in the height direction of the skeleton, and the skeleton and the mesh unit cooperate to define a protection area, and the sand-fixing plants are planted in the protection area.

[0009] In an optional embodiment, the skeleton includes a plurality of columns, and a mesh unit is provided between any two adjacent columns. The mesh unit is slidably matched with two adjacent columns to adjust the height of the mesh unit.

[0010] Based on the above scheme, the mesh unit is positioned by cooperating with two columns, so the force on the mesh unit is more balanced, the position of the mesh unit is stable and reliable, it is not easy to be blocked and damaged, the service life is long, and the sand blocking and fixation effect is good.

[0011] In an optional embodiment, the net unit includes a sliding net body and two fixed seats, the sliding net body is slidably connected between the two fixed seats, and the two fixed seats are respectively fixedly connected to two adjacent columns.

[0012] Based on the above solution, the two fixing seats are connected to the two columns respectively, which is convenient for installation. In addition, the sliding net body is slidably matched with the two fixing seats, so that it can slide vertically relative to the columns to achieve height adjustment, which is convenient and flexible to operate.

[0013] In an optional embodiment, a guide groove is provided on the side of the fixed seat, and one end of the guide groove in the length direction extends to the top of the fixed seat; guide rods are provided on the opposite sides of the sliding net body, and the guide rods are slidably engaged with the corresponding guide grooves, and the guide rods and the guide grooves are relatively fixed in the direction of the bottom wall of the guide groove toward the groove opening.

[0014] Based on the above solution, the guide rod cooperates with the guide groove to guide the vertical sliding of the sliding net body, and the sliding is smooth and reliable. Moreover, the guide rod is engaged with the guide groove, and the guide rod will not fall out of the notch of the guide groove. The position of the sliding net body is stable and reliable, and the service life is long.

[0015] In an optional embodiment, the cross-sectional profile of the guide groove is a major arc shape, and the cross-section is a plane perpendicular to the length direction of the guide groove.

[0016] Based on the above solution, the guide groove has a regular structure, is easy to manufacture, and is easy to use with the guide rod. Correspondingly, the guide rod can be a cylindrical rod, which can be inserted from the notch of the guide groove at the top of the fixing seat, which is easy to operate.

[0017] In an optional embodiment, the net unit also includes a fixed net body, which is fixed between the two fixed seats, and the fixed net body is arranged parallel to and spaced apart from the sliding net body. When the sliding net body is adjusted in height, at least part of the sliding net body overlaps with the fixed net body in a direction perpendicular to the fixed net body.

[0018] Based on the above solution, through the cooperation of the fixed net body and the sliding net body, when the height of the sliding net body is not enough and the top is buried by wind and sand or is about to be buried, the sliding net body is sleeved to increase its height. Since there is a fixed net body at the bottom, even if the sliding net body rises, the accumulated sand at the bottom can still be blocked by the fixed net body, thereby improving the sand blocking and sand fixation effect.

[0019] In an optional embodiment, the fixed net body and the sliding net body have different mesh densities.

[0020] Based on the above scheme, the mesh density of the two is different. After coordination, the mesh density can be further adjusted to achieve partial mesh blocking, which can achieve better sand prevention effect.

[0021] In an optional embodiment, the mesh density of the fixed net body or the sliding net body gradually decreases from bottom to top.

[0022] Based on the above scheme, the wind and sand in the lower part are more serious, the mesh density in the lower part is large, and the sand prevention and fixation effect is better.

[0023] In an optional embodiment, the fixing seat and the column are fixedly connected via fasteners.

[0024] Based on the above solution, the installation method of the fixing base and the column is simple and reliable. The column can be a rectangular column with four flat sides. The mounting surface of the fixing base can also be a flat surface. The large contact area between the flat surfaces facilitates the installation of the fixing base and improves stability.

[0025] In an optional embodiment, the fastener is configured as a bolt or a screw.

[0026] Based on the above solution, the selection of fasteners is flexible and the fixing operation is convenient and quick.

[0027] The beneficial effects of the embodiments of the present invention include, for example:

[0028] In summary, the comprehensive protection system for areas with relatively weak wind and sand hazards provided by this embodiment adopts the remediation measures of "far consolidation and near enclosure and cultivation", and comprehensively controls the wind and sand hazards at the edge of the oasis in the Qaidam Basin according to local conditions. According to the characteristics of the areas with relatively weak wind and sand hazards at the edge of the oasis in the Qaidam Basin, which are located in high-altitude and cold areas with strong winds, frequent wind and sand activities, sparse vegetation cover, and sensitive and fragile ecological environment, a layered and progressive comprehensive prevention and control approach with consolidation as the main focus and far consolidation and near enclosure and cultivation has been formulated. Specifically, first, a mixed sand-fixing belt is set up at the outermost side of a protection belt, such as farmland. As the outermost layer of the protection system, the mixed sand-fixing belt mainly slows down the wind speed and stabilizes the quicksand by setting up vertical sand barriers and planting sand-fixing plants, thereby preventing the expansion of sand dunes. By reducing surface wind speed, the sand barriers provide favorable conditions for the growth of sand-fixing plants in the inner layer, ensuring their smooth growth and further sand fixation. Furthermore, the height of the mesh units can be adjusted as needed to adapt to changing on-site conditions, making them flexible and highly adaptable. Secondly, the central sand-sealing and grassland-cultivating area, the core of the protection system, focuses on restoring the sand-sealed river grasslands. Through rotational grazing and sealing, these methods promote vegetation recovery and sand consolidation. Proper utilization and management of this area, without affecting vegetation growth, can enhance its ecological benefits and support the stability of the protection system. Next, the mixed forest-grassland area, located on the inner side, near the protected zone, serves as the innermost layer of the protection system. By establishing mixed forest-grassland areas and integrating them with economic activities, they maintain ecological balance and generate economic benefits. By selecting economic plants adapted to the local environment and rationally implementing activities such as firewood harvesting, mowing, and grazing, a win-win situation is achieved between ecological and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of a comprehensive protection system for sandstorm hazard areas at the edge of the Qaidam Basin oasis according to an embodiment of the present application;

[0031] Figure 2 A schematic diagram of a vertical sand barrier according to an embodiment of the present application;

[0032] Figure 3 for Figure 2 A local enlarged schematic diagram in FIG.

[0033] Figure 4Schematic diagram of a guide rod according to an embodiment of the present application.

[0034] icon:

[0035] 001-protected body; 002-main wind direction; 100-mixed sand-fixing belt; 110-vertical sand barrier; 120-sand-fixing plants; 130-post; 140-sliding net body; 150-fixing seat; 151-guide groove; 160-guide rod; 170-fixing net body; 180-pull ring; 190-pull rope; 200-sand-sealing and grass-cultivating belt; 300-mixed forest-grass belt. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the invented product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0040] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0041] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0042] Please combine Figures 1-4In this embodiment, the comprehensive protection system for wind-damaged areas at the edge of the Qaidam Basin oasis includes a mixed sand-fixation belt 100, a sand-sealing and grass-cultivating belt 200, and a mixed forest-grass belt 300, arranged sequentially in the main wind direction 002. The mixed sand-fixation belt 100 is located at the rear of the main wind direction 002. The mixed forest-grass belt 300 includes vertical sand barriers 110 and sand-fixing plants 120. The vertical sand barriers 110 include a frame and a mesh unit. The frame is fixed to the ground surface, and the mesh unit slidably engages with the frame in the height direction of the frame. The frame and mesh unit cooperate to define a protection zone, and the sand-fixing plants 120 are planted within the protection zone.

[0043] It should be understood that the comprehensive protection system for areas with less wind and sand hazards can be applied to areas with less wind and sand hazards at the edge of the Qaidam Basin oasis, for example, protecting protected object 001, such as farmland. The comprehensive protection system for areas with less wind and sand hazards is located on the windward side of protected object 001, with mixed forest and grassland belt 300 positioned adjacent to protected object 001. In other words, mixed sand fixation belt 100 is further away from protected object 001 than mixed forest and grassland belt 300.

[0044] As described above, the protection method of the comprehensive protection system for areas with weak wind and sand hazards provided by this embodiment is as follows:

[0045] First, a mixed sand-fixing belt 100 is set up on the outermost side of a protective belt, such as a farmland. As the outermost layer of the protective system, the mixed sand-fixing belt 100 mainly slows down the wind speed and stabilizes the quicksand to prevent the expansion of sand dunes by setting up vertical sand barriers 110 and planting sand-fixing plants 120. The sand barriers provide favorable conditions for the growth of the inner layer of sand-fixing plants 120 by reducing the surface wind speed, ensuring that they can grow smoothly and further fix the sand. At the same time, according to the changing on-site environment, the height of the mesh unit can be adjusted as needed, which is flexible to use and has strong adaptability to the environment. Secondly, the sand-fixing and grass-cultivating area in the middle is located at the core of the protective system. It mainly aims at sand-fixing and grassland restoration. Through methods such as rotational grazing and rotational sealing, it promotes vegetation recovery and sand consolidation. Without affecting the growth of vegetation, proper use and management of this area can enhance its ecological benefits and provide support for the stability of the protective system. Next, the mixed forest and grassland area located inward, near the protected zone, serves as the innermost layer of the protection system. By establishing this mixed forest and grassland area and integrating it with economic activities, we can maintain ecological balance while providing economic benefits. By selecting economic plants adapted to the local environment and rationally implementing activities such as firewood harvesting, mowing, and grazing, we can achieve a win-win situation for both ecological and economic benefits.

[0046] The following embodiments illustrate the details of the comprehensive protection system for areas with relatively weak sandstorm hazards of the present application by way of examples.

[0047] Please combine Figure 2In this embodiment, optionally, the skeleton includes a plurality of columns 130, and a mesh unit is provided between any two adjacent columns 130. The mesh unit is slidably matched with the two adjacent columns 130 to adjust the height of the mesh unit. The number of columns 130 can be set as needed. For example, after determining the distance between adjacent columns 130 and the size of the area to be covered, the number of columns 130 can be determined based on the ratio, that is, the distance between adjacent columns 130 on the side length of the area is used to obtain the number of columns 130 on the side length. In this embodiment, the protection area can be set to 300mX300m, and four columns 130 enclose a protection area. The size of the protection area is 1mX1m. In this way, the distance between adjacent columns 130 is 1m. At the same time, the height of the columns 130 can be set as needed. For example, the height of the columns 130 can be 0.3m-0.5m, etc.

[0048] With such a design, the two columns 130 cooperate to position the mesh unit, so that the force on the mesh unit is more balanced, the position of the mesh unit is stable and reliable, it is not easily blocked and damaged, the service life is long, and the sand blocking and fixing effect is good.

[0049] It should be understood that the bottom of the column 130 can be configured as a pointed end to facilitate insertion into the ground.

[0050] Please combine Figure 2-Figure 3 In this embodiment, optionally, the net unit includes a sliding net body 140 and two fixed seats 150 , the sliding net body 140 is slidably connected between the two fixed seats 150 , and the two fixed seats 150 are respectively fixedly connected to two adjacent columns 130 .

[0051] It should be understood that the two fixing bases 150 are respectively connected to the two columns 130, which makes installation easy. The sliding net body 140 and the two fixing bases 150 are slidably matched, thereby sliding vertically relative to the columns 130 to achieve height adjustment, which is convenient and flexible to operate.

[0052] Alternatively, the fixing seat 150 may be a rectangular bar, with one side of the fixing seat 150 abutting against the side of the column 130. The fixing seat 150 may be secured to the column 130 via fasteners such as bolts or screws. A guide groove 151 is provided on the other side of the fixing seat 150. The length of the guide groove 151 coincides with the length of the fixing seat 150, and one end of the guide groove 151 extends to the top of the fixing seat 150. Guide rods 160 are provided on opposite sides of the sliding net body 140. The guide rods 160 slidably engage with the corresponding guide grooves 151, and the guide rods 160 and the guide grooves 151 are relatively fixed in a direction from the bottom wall of the guide groove 151 toward the notch.

[0053] In this way, the guide rod 160 cooperates with the guide groove 151 to guide the sliding net body 140 to slide vertically, and the sliding is stable and reliable. Moreover, the guide rod 160 is engaged with the guide groove 151, and the guide rod 160 will not fall out of the notch of the guide groove 151. The position of the sliding net body 140 is stable and reliable, and the service life is long.

[0054] Furthermore, the cross-sectional profile of the guide groove 151 is a superior arc, with the cross section being a plane perpendicular to the length of the guide groove 151. The guide groove 151 has a regular structure, is easy to manufacture, and conveniently used with the guide rod 160. Correspondingly, the guide rod 160 can be a cylindrical rod that can be inserted through a notch in the guide groove 151 located at the top of the fixing base 150, making operation convenient.

[0055] In this embodiment, the net unit optionally further includes a fixed net body 170, which is fixed between the two fixing seats 150. The fixed net body 170 can be fixed to the fixing seats 150 by means of structural members such as screws. The fixed net body 170 is arranged parallel to and spaced apart from the sliding net body 140. When the sliding net body 140 is adjusted in height, at least a portion of the sliding net body 140 overlaps with the fixed net body 170 in a direction perpendicular to the fixed net body 170. Furthermore, the two can be arranged adjacent to each other, and the sliding net body 140 can fit closely with the fixed net body 170, with a small distance between them and occupying a small space.

[0056] At the same time, through the cooperation of the fixed net body 170 and the sliding net body 140, when the height of the sliding net body 140 is not enough and the top is buried by quicksand or is about to be buried, the sliding net body 140 is sleeved to increase its height. Since there is a fixed net body 170 at the bottom, even if the sliding net body 140 rises, the accumulated sand at the bottom can still be blocked by the fixed net body 170, thereby improving the sand blocking and sand fixation effect.

[0057] In other embodiments, the fixed net body 170 and the sliding net body 140 may optionally have different mesh densities. These different mesh densities can be combined to further adjust the mesh density, allowing for partial blocking of meshes and achieving a better sand control effect. It should be understood that the density of the fixed net body 170 can be greater than that of the sliding net body 140.

[0058] In this embodiment, the mesh density of the fixed net body 170 or the sliding net body 140 is optionally reduced from bottom to top. In actual use, the wind and sand are more serious in the lower part, and the mesh density in the lower part is large, which has a better sand prevention and sand fixation effect.

[0059] Please combine Figure 4Furthermore, to facilitate height adjustment of the guide rod 160, a pull ring 180 can be provided at the top of the guide rod 160, and a pull cord 190 can be attached to the pull ring 180. When the height needs to be adjusted, force is applied to the pull cord 190 to drive the guide rod 160 upward, thereby raising the height of the sliding net body 140. Since the sliding net body 140 is partially buried in the quicksand, after the sliding net body 140 rises, it is blocked by the accumulated sand below, making it difficult to automatically descend, and the height is stable.

[0060] In addition, a fixed net body 170 may be provided on both sides of the sliding net body 140 .

[0061] In this embodiment, it should be noted that the sand-fixing plants 120 may be native species that grow in sand, such as Artemisia ordosica, Tamarix chinensis, Caragana korshinskii, and Haloxylon ammodendron. The sliding net body 140 and the fixed net body 170 may be HDPE (high-strength polyethylene) nets or wheat straw grids.

[0062] In this embodiment, it should be noted that the width of the sand-sealing and grass-cultivating belt 200 in the middle can be 100-200m. It is located in the middle of the protection system and downwind of the mixed sand-fixing belt 100. The range or width is determined according to the degree of local wind and sand hazard. Artificial grass cultivation is supplemented by sowing plants such as Artemisia ordosica, Tamarix chinensis, and Haloxylon ammodendron, with 2-4 plants planted per square meter. Within the closed-off area, without affecting grass cultivation and sand fixation, rotational grazing and rotational grazing can be used to achieve the purpose of vegetation restoration in the entire closed-off area. The rotational grazing cycle is generally 1-2 years. The boundaries of the closed-off area are marked to prevent human interference.

[0063] In this embodiment, it should be noted that the mixed forest-grassland belt 300, located near the protected area 001 and located at the inner edge of the protection system and downwind of the sand sealing and grass cultivation area, is permitted to carry out a certain degree of economic activity under certain conditions. Plants suitable for the local ecological environment and with economic benefits, such as Populus cathayana, Tamarix chinensis, and Haloxylon ammodendron, are selected to establish the mixed forest-grassland area. Rows of trees are planted every 10-15 meters, with spacing of 2-3 meters. Economic activities such as firewood collection, grass cutting, and grazing are carried out in an orderly manner to ensure that the ecological balance is not affected.

[0064] The comprehensive protection system for areas with relatively weak wind and sand hazards provided in this embodiment adopts the remediation measures of "far-range consolidation and near-range enclosure and cultivation" to comprehensively control the wind and sand hazards on the edge of the oasis in the Qaidam Basin according to local conditions.

[0065] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A comprehensive protection system for wind and sand hazard areas at the edge of the Qaidam Basin oasis, characterized by: include: A mixed sand-fixing belt (100), a sand-sealing and grass-cultivating belt (200), and a mixed forest-grass belt (300) are sequentially arranged in the main wind direction (002), wherein the mixed sand-fixing belt (100) is located at the rear of the main wind direction (002); the mixed forest-grass belt (300) comprises a vertical sand barrier (110) and sand-fixing plants (120); the vertical sand barrier (110) comprises a frame and a mesh unit, wherein the frame is used to be fixed to the ground surface, the mesh unit and the frame are slidably matched in the height direction of the frame, the frame and the mesh unit cooperate to define a protection area, and the sand-fixing plants (120) are planted in the protection area.

2. The comprehensive protection system for wind and sand hazards in the oasis edge of the Qaidam Basin according to claim 1 is characterized by: The skeleton comprises a plurality of columns (130), and a mesh unit is provided between any two adjacent columns (130). The mesh unit is slidably matched with the two adjacent columns (130) to adjust the height of the mesh unit.

3. The comprehensive protection system for sandstorm hazard areas at the edge of the Qaidam Basin oasis according to claim 2 is characterized by: The net unit comprises a sliding net body (140) and two fixing seats (150). The sliding net body (140) is slidably connected between the two fixing seats (150). The two fixing seats (150) are respectively fixedly connected to two adjacent columns (130).

4. The comprehensive protection system for sandstorm hazard areas at the edge of the Qaidam Basin oasis according to claim 3 is characterized by: A guide groove (151) is provided on the side of the fixing seat (150), and one end of the guide groove (151) in the length direction thereof extends to the top of the fixing seat (150); guide rods (160) are provided on opposite sides of the sliding net body (140), and the guide rods (160) are slidably matched with the corresponding guide groove (151), and the guide rods (160) and the guide groove (151) are relatively fixed in the direction from the bottom wall of the guide groove (151) to the notch.

5. The comprehensive protection system for sandstorm hazard areas at the edge of the Qaidam Basin oasis according to claim 4 is characterized by: The cross-sectional profile of the guide groove (151) is an arc shape, and the cross-sectional profile is a plane perpendicular to the length direction of the guide groove (151).

6. The comprehensive protection system for wind and sand hazards in the oasis edge of the Qaidam Basin according to claim 3 is characterized by: The net unit further comprises a fixed net body (170), wherein the fixed net body (170) is fixed between the two fixed seats (150), and the fixed net body (170) and the sliding net body (140) are arranged in parallel and spaced apart from each other. When the sliding net body (140) is adjusted in height, at least a portion of the sliding net body (140) overlaps with the fixed net body (170) in a direction perpendicular to the fixed net body (170).

7. The comprehensive protection system for wind and sand hazards in the oasis edge of the Qaidam Basin according to claim 6 is characterized by: The fixed net body (170) and the sliding net body (140) have different mesh densities.

8. The comprehensive protection system for wind and sand hazards in the oasis edge of the Qaidam Basin according to claim 6 is characterized by: The mesh density of the fixed net body (170) or the sliding net body (140) gradually decreases from bottom to top.

9. The comprehensive protection system for wind and sand hazards in the oasis edge of the Qaidam Basin according to any one of claims 3 to 8, characterized in that: The fixing seat (150) and the column (130) are fixedly connected via fasteners.

10. The comprehensive protection system for wind and sand hazards in the oasis edge of the Qaidam Basin according to claim 9, characterized in that: The fasteners are configured as bolts or screws.

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