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 on the edge of a Qaidam basin oasis, relates to the technical field of environmental governance, is used for being arranged on the windward side of a to-be-protected body such as a farmland, and comprises a first sand barrier, a second sand barrier and a sand sealing and forest raising unit which are sequentially arranged in the main wind direction. The sand sealing and forest raising unit is arranged close to farmland; the first sand barrier is arranged according to the topographic relief of a sand dune and comprises a plurality of fixing columns, a plurality of windproof caps and sand blocking nets installed between every two adjacent fixing columns, and the windproof caps are installed at the tops of the fixing columns in a one-to-one correspondence mode; the second sand barrier comprises a plurality of grid units connected in sequence and sand stabilization plants planted in an area defined by the grid units. The protection system is good in sand blocking and fixing effect and good in environmental governance effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of environmental management technology, and particularly relates to a comprehensive protection system for a wind-sand hazard region at the edge of an oasis in the Qaidam Basin. BACKGROUND

[0002] Desertification of cultivated land in the Qaidam Basin is mainly manifested in desertification on the periphery of cultivated land and salinization within cultivated land. The harm of wind-sand to cultivated land mainly manifests in topsoil loss, sand hitting seedlings, and sand burying farmland, etc. Currently, to cope with these problems, the strategy of "small management and large reclamation" has been implemented in oasis agricultural areas, focusing on developing measures such as afforestation, irrigation, grassland restoration, etc. according to local conditions, while adopting technologies such as the combination of trees, shrubs and grasses, the combination of strips and nets, deep planting of willows, drip irrigation, intercropping of trees and grasses, etc. to ensure the quality of vegetation. In the western part, especially in the harsh climate and severely saline-alkali land of Mangya Dachaidan area, the survival rate of trees is extremely low, so the method of replacing soil to eliminate alkali is adopted to plant trees and grasses. In addition, a regional wind-prevention and sand-fixation green barrier has been built, which focuses on the prevention and control of areas around cities, along transportation lines, and farmland, and takes protective forests as the main protective measures.

[0003] Although the planting of protective forest belts has certain effects on wind prevention and sand fixation in the short term, its limitations gradually appear. First, protective forest belts require a long growth period, and the survival rate is greatly affected by climate and soil conditions. In areas such as desert edges, riverbanks, and wind gaps, the probability of farmland being buried by wind-sand is high and the harm is serious, and a single protective forest belt often cannot provide comprehensive and effective protection. Second, protective forest belts occupy cultivated land area, causing certain pressure on agricultural production. Moreover, with the continuous deterioration of the ecological environment, the updating and maintenance of existing protective forest belts also face challenges, which may lead to a decrease in protective effect.

[0004] Therefore, it is particularly necessary to construct a comprehensive prevention and control system for the wind-sand disaster serious region in the desert-oasis transition zone of the Qaidam Basin. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the utility model includes, for example, providing a comprehensive protection system for a wind-sand hazard region at the edge of an oasis in the Qaidam Basin, which can achieve comprehensive improvement and long-term stability of the regional ecological environment through systematic planning and implementation. The establishment of the sand prevention system can provide more comprehensive protection, reduce the harm of wind-sand to cultivated land, optimize land use, and improve the efficiency of sustainable use of resources, thereby promoting the ecological restoration of the Qaidam Basin and surrounding areas.

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

[0007] In a first aspect, the utility model provides a comprehensive protection system for a wind-sand hazard region at the edge of an oasis in the Qaidam Basin, which is arranged on the windward side of farmland, comprising:

[0008] The first sand barrier, the second sand barrier and the sand blocking and afforestation unit are arranged in sequence in the main wind direction, and the sand blocking and afforestation unit is arranged close to the farmland; the first sand barrier is arranged according to the undulating topography of the sand dune, and the first sand barrier comprises a plurality of fixed columns, a plurality of windproof caps and a sand blocking net installed between two adjacent fixed columns, and the plurality of windproof caps are respectively and one by one installed on the top of the plurality of fixed columns; the second sand barrier comprises a plurality of square units connected in sequence and sand fixing plants planted in the area surrounded by the square units.

[0009] In an optional embodiment, the fixed column comprises an integrated straight rod segment and a tapered rod segment, the tapered rod segment is used to guide the straight rod segment to be inserted into the sand ground, an anti-pulling groove is arranged on the outer circumferential surface of the straight rod segment, the windproof cap is installed on the end of the straight rod segment, and the sand blocking net is installed on the straight rod segment.

[0010] Based on the above scheme, by arranging the tapered rod segment, when the fixed column is installed, the tapered rod segment is inserted into the sand ground with the tip of the tapered rod segment as the lower end at the marked position, and an external force can be applied from the end of the straight rod segment to control the insertion depth. The insertion depth can be referenced by the height of the anti-pulling groove, and at least part of the anti-pulling groove is buried in the accumulated sand. Since the anti-pulling groove is designed, when the sand particles enter the anti-pulling groove, better stability of the fixed column can be provided, and the fixed column is not easy to be blown down by the wind and sand.

[0011] In an optional embodiment, the anti-pulling groove comprises a groove bottom wall, a first groove side wall and two second groove side walls, the groove bottom wall has an included angle with the axis of the straight rod segment, and the groove depth of the anti-pulling groove gradually decreases in the direction from the tapered rod segment to the straight rod segment; the first groove side wall is connected to the side of the groove bottom wall close to the tapered rod segment, and the two second groove side walls are respectively connected to the two sides of the groove bottom wall opposite in the circumferential direction of the straight rod segment.

[0012] Based on the above scheme, when the fixed column is inserted, the insertion depth can be buried in the flowing sand by at least the first groove side wall of the anti-pulling groove as a reference. That is, part of the straight rod segment also enters the sand ground together with the tapered rod segment. Since the groove bottom wall of the anti-pulling groove is arranged obliquely, after the first groove wall is buried in the flowing sand, the anti-pulling groove can play a blocking role to limit the upward movement of the fixed column, thereby improving the stability of the fixed column, the fixed column is not easy to be pulled up by the wind and sand, the fixing effect is good, and the service life is long.

[0013] In an optional embodiment, the number of the anti-pulling grooves is multiple and is arranged at intervals around the axis of the straight rod segment.

[0014] Based on the above scheme, by arranging multiple anti-pulling grooves, an anti-pulling force can be formed around the fixed column, thereby further improving the stability of the fixed column.

[0015] In an optional embodiment, the straight rod section is arranged in a telescopic structure.

[0016] Based on the above scheme, the length of the straight rod section can be adjusted as required to adapt to the use requirements of different environments, and the use range is wide. At the same time, the length of the straight rod section can be adjusted to be small during transportation or storage, the length of the entire fixed column is small, the occupied space is small, and the transportation and storage are convenient, thereby reducing the transportation cost.

[0017] In an optional embodiment, the straight rod section includes a fixed rod body, a sliding rod body, and a locking piece, the fixed rod body is integrally formed with the tapered rod section; the fixed rod body is provided with a blind hole, the sliding rod body is slidably inserted into the blind hole, the locking piece is screwed and fixed with the fixed rod body, the end of the locking piece extends into the blind hole, and the end of the locking piece extending into the blind hole is used to contact the sliding rod body to limit the sliding of the sliding rod body relative to the fixed rod body.

[0018] Based on the above scheme, when it is necessary to adjust the length of the straight rod section, the locking piece is loosened, the sliding rod body is not limited by the locking piece, the sliding rod body can be pressed or pulled up as required, the sliding rod body moves relative to the fixed rod body, the length adjustment of the straight rod section is realized, after the adjustment is completed, the locking piece is rotated, the end of the locking piece abuts against the outer peripheral surface of the sliding rod body, the sliding rod body and the fixed rod body are locked by the locking piece, and the length of the straight rod section remains unchanged. The length adjustment operation of the straight rod section is convenient, and the structure of the straight rod section is stable after the length adjustment, thereby prolonging the service life.

[0019] In an optional embodiment, the fixed column further includes a plurality of clamping seats, the plurality of clamping seats are distributed on the fixed rod body and the sliding rod body, each clamping seat is provided with a clamping groove, the center lines of the clamping grooves of the plurality of clamping seats are collinear, the center line is parallel to the axis of the fixed column, and one side of the sand prevention net is clamped in the plurality of clamping grooves in the same vertical column.

[0020] Based on the above scheme, the sand prevention net is installed by using the plurality of clamping seats arranged in vertical columns, the installation structure of the sand prevention net is simple, the installation operation is convenient, and the on-site installation efficiency can be improved. At the same time, the plurality of clamping seats increase the fixing points of the sand prevention net and improve the stability of the sand prevention net.

[0021] In an optional embodiment, the cross-sectional profile of the clamping groove is an arc shape, and the cross section is a plane perpendicular to the center line.

[0022] Based on the above scheme, the structure of the clamping groove is regular, the clamping groove is convenient to process, the groove wall of the clamping groove is an arc surface, the groove wall is smooth, there is no internal corner line, stress concentration is not easy to occur, the clamping groove is not easy to crack, and the service life is long.

[0023] In an optional embodiment, the sand blocking net comprises a net body and two clamping rods installed on opposite sides of the net body, the two clamping rods are matched with two adjacent fixed columns respectively, and each clamping rod is clamped and matched with a plurality of clamping grooves in the same vertical column.

[0024] Based on the above scheme, the clamping rod is matched with the plurality of clamping grooves, the installation is convenient, the combination is firm, and the service life is long.

[0025] In an optional embodiment, the square unit is set as a wheat straw square.

[0026] Based on the above scheme, the wheat straw square has simple structure, low cost, and good sand blocking and sand fixing effect.

[0027] The beneficial effects of the embodiments of the utility model include, for example:

[0028] In summary, the comprehensive protection system for the oasis edge aeolian hazard area in the Qaidam Basin provided by the embodiment is characterized in that the first sand barrier, the second sand barrier and the sand blocking and afforestation unit are sequentially arranged in the main wind direction, so that the sand blocking and afforestation unit is close to the protected body such as farmland, and according to the characteristics of the special ecologically fragile belt between the desert and the oasis, the wind-formed landform development is obvious, the vegetation coverage is low, and the land is desertified, a prevention and control idea of taking fixing as the main method, combining fixing with blocking, far blocking, middle fixing and near enclosure is formulated. Specifically, first, the first sand barrier on the outside is arranged to provide sand source for the flowing sand dune on the outermost edge, the flowing sand dune is locked and sand-fixed by engineering measures, and is regularly manually adjusted to intercept the sand material of the sand dune into the downwind direction and prevent the sand material from providing sand source for the protected body; and the top of the fixed column is provided with a windproof cap, which can reduce the impact of wind sand on the fixed column, reduce the wind resistance and improve the stability of the fixed column. Second, the second sand barrier in the form of a square is arranged on the sand surface in the middle zone to fix the sand. The sand-fixing plants are planted and cultivated in the square sand barrier to accelerate the vegetation recovery. Third, the sand blocking and afforestation unit is arranged on the innermost edge, the sand blocking and afforestation unit is located in the downwind direction of the second sand barrier, and the range and width of the enclosure are determined according to the actual needs of the protected body, and the enclosure can be opened under certain conditions to organize agricultural and pastoral production activities. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

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

[0031] Figure 2 Fig. 2 is a schematic diagram of a first sand barrier according to an embodiment of the present application;

[0032] Figure 3 Fig. 3 is a schematic diagram of a fixed column according to an embodiment of the present application.

[0033] Fig. 1 is a schematic diagram of a comprehensive protection system for a sandstorm hazard region at the edge of an oasis in the Qaidam Basin according to an embodiment of the present application;

[0034] 001-main wind direction; 002-farmland; 100-first sand barrier; 110-fixed column; 111-straight rod segment; 1111-fixed rod body; 1112-sliding rod body; 1113-locking piece; 112-tapered rod segment; 113-pull-out resistant groove; 1131-groove bottom wall; 1132-first groove side wall; 1133-second groove side wall; 114-clamping seat; 1141-clamping groove; 120-windproof cap; 130-sand blocking net; 131-net body; 132-clamping rod; 200-second sand barrier; 210-square grid unit; 220-sand-fixing plant; 300-sand-sealing and tree-planting unit. DETAILED DESCRIPTION

[0035] In order to make the objects, technical schemes and advantages of the embodiments of the present application clearer, the technical schemes in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0037] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, thus, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] In the description of the utility model, it needs to be explained that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the application is used, it is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0039] In addition, if the terms "first", "second" and the like are used only for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0040] It needs to be explained that the features in the embodiments of the utility model can be combined with each other without conflict.

[0041] Please refer to Figures 1-3 In the embodiment, the comprehensive protection system for wind-sand hazard area at oasis edge of Qaidam Basin is arranged on the windward side of the protected body such as farmland 002, which comprises a first sand barrier 100, a second sand barrier 200 and a sand sealing and afforestation unit 300 arranged in sequence in the main wind direction 001, and the sand sealing and afforestation unit 300 is arranged close to the farmland 002; the first sand barrier 100 is arranged according to the undulation of the dune terrain, and comprises a plurality of fixed columns 110, a plurality of windproof caps 120 and a sand blocking net 130 installed between adjacent two fixed columns 110, and the plurality of windproof caps 120 are respectively and one-to-one installed on the top of the plurality of fixed columns 110; the second sand barrier 200 comprises a plurality of square units 210 connected in sequence and sand-fixing plants 220 planted in the area surrounded by the square units 210.

[0042] As described above, the sand blocking and sand fixing mode of the comprehensive protection system for wind-sand hazard area at oasis edge of Qaidam Basin provided by the embodiment is as follows:

[0043] According to the wind-sand movement law and disaster-causing characteristics of the serious wind-sand hazard area at oasis edge of Qaidam Basin, the sand blocking measures, square sand barrier, artificial vegetation restoration technology and sand sealing and grass planting measures are used in sequence on the side of the main damage wind direction of the oasis edge, so as to build a comprehensive protection system integrating sand blocking and sand fixing, fill the blind area of the prevention and control research of the serious wind-sand disaster area at oasis edge of Qaidam Basin, broaden the research field of wind-sand prevention and control, and provide theoretical basis and technical reserve for the wind-sand prevention and control of high-cold railway. Through the sand sealing and afforestation measures, the restored vegetation can enhance the ecological resilience of the oasis edge area. After the establishment of the protection system, the active sand surface is stabilized, the soil physical and chemical properties are improved, which is beneficial to the restoration and growth of natural vegetation and enhances the ecological stability of the region.

[0044] The details of the comprehensive protection system for wind-sand hazard area at oasis edge of Qaidam Basin in the embodiments of the application are described in an exemplary manner below.

[0045] Please combine Figure 2 In this embodiment, optionally, the fixed column 110 includes an integral straight rod section 111 and a tapered rod section 112, the straight rod section 111 and the tapered rod section 112 can be coaxially arranged, the cross section of the tapered rod section 112 can be circular, which is convenient for processing, small wind resistance, not easy to be blown down by wind and sand, and long service life. In use, the tapered rod section 112 is used to guide the straight rod section 111 to be inserted into the sandy ground. At the same time, the outer circumferential surface of the straight rod section 111 is provided with an anti-pulling groove 113, a windproof cap 120 is installed at the end of the straight rod section 111, and a sand blocking net 130 is installed on the straight rod section 111.

[0046] It is worth noting that by arranging the tapered rod section 112, when installing the fixed column 110, the tapered rod section 112 is inserted into the sandy ground with the tip of the tapered rod section 112 as the lower end at the marked position, and an external force can be applied from the end of the straight rod section 111 to control the insertion depth. The insertion depth can be referred to the height of the anti-pulling groove 113, at least part of the anti-pulling groove 113 is buried in the accumulated sand, and the fixed column 110 is not easy to be blown down by wind and sand due to the design of the anti-pulling groove 113, which can provide better stability for the fixed column 110 when the sand particles enter the anti-pulling groove 113.

[0047] Optionally, the anti-pulling groove 113 includes a groove bottom wall 1131, a first groove side wall 1132 and two second groove side walls 1133. The groove bottom wall 1131 has an included angle with the axis of the straight rod section 111, and the groove depth of the anti-pulling groove 113 gradually decreases in the direction from the tapered rod section 112 to the straight rod section 111; the first groove side wall 1132 is connected to the side of the groove bottom wall 1131 close to the tapered rod section 112, and the two second groove side walls 1133 are respectively connected to the two sides of the groove bottom wall 1131 opposite in the circumferential direction of the straight rod section 111.

[0048] In this way, when the fixed column 110 is inserted, the insertion depth can be buried in the flowing sand as a reference by at least the first groove side wall 1132 of the anti-pulling groove 113. That is, part of the straight rod section 111 also enters the sandy ground together with the tapered rod section 112, and since the groove bottom wall 1131 of the anti-pulling groove 113 is arranged obliquely, the first groove wall is buried in the flowing sand, which can play a blocking role to limit the upward movement of the fixed column 110, thereby improving the stability of the fixed column 110, the fixed column 110 is not easy to be pulled up by the wind and sand, the fixed effect is good, and the service life is long.

[0049] In addition, the distance between the two second groove sidewalls 1133 of the anti-pulling groove 113 can be set to be gradually changed, that is, the groove width of the anti-pulling groove 113 is gradually changed. Specifically, the distance between the two second groove sidewalls 1133 of the anti-pulling groove 113 gradually increases in the direction from the tapered rod section 112 to the straight rod section 111. The funnel-like part of the anti-pulling groove 113 can further increase the stability of the sand particles to the fixing column 110.

[0050] Please refer to Figure 2 It should be understood that the number of anti-pulling grooves 113 is multiple and is arranged at intervals around the axis of the straight rod section 111. By arranging multiple anti-pulling grooves 113, an anti-pulling force can be formed around the fixing column 110, thereby further improving the stability of the fixing column 110.

[0051] In the embodiment, the straight rod section 111 is optionally arranged in a telescopic structure. The length of the straight rod section 111 can be adjusted as needed, thereby adapting to the use requirements of different environments and having a wide range of use. At the same time, when transporting or storing, the length of the straight rod section 111 can be adjusted to be small, the length of the entire fixing column 110 is small, the space occupied is small, and the transportation and storage are facilitated, thereby reducing the transportation cost.

[0052] In an optional embodiment, the straight rod section 111 includes a fixed rod body 1111, a sliding rod body 1112, and a locking piece 1113. The fixed rod body 1111 is integrally formed with the tapered rod section 112. The fixed rod body 1111 is provided with a blind hole, which is a circular hole. A guide groove is arranged on the hole wall of the blind hole, which can be a rectangular groove. The sliding rod body 1112 is slidably inserted into the blind hole. Apparently, the sliding rod body 1112 can also be a cylindrical body to reduce wind resistance. A guide strip is arranged on the sliding rod body 1112 and is inserted into the guide groove to prevent the sliding rod body 1112 from rotating relative to the fixed rod body 1111. The locking piece 1113 is screwed with the fixed rod body 1111. The end of the locking piece 1113 extends into the blind hole. The end of the locking piece 1113 extending into the blind hole is used to contact the sliding rod body 1112 to limit the sliding of the sliding rod body 1112 relative to the fixed rod body 1111.

[0053] It should be understood that when the length of the straight rod section 111 needs to be adjusted, the locking member 1113 is loosened, the sliding rod body 1112 is not limited by the locking member 1113, and the sliding rod body 1112 can be pressed or pulled up as needed to move the sliding rod body 1112 relative to the fixed rod body 1111, so as to adjust the length of the straight rod section 111. After the adjustment is completed, the locking member 1113 is rotated, and the end of the locking member 1113 abuts against the outer circumferential surface of the sliding rod body 1112. The sliding rod body 1112 and the fixed rod body 1111 are locked by the locking member 1113, and the length of the straight rod section 111 remains unchanged. The length adjustment operation of the straight rod section 111 is convenient, and the structure is stable after the length adjustment of the straight rod section 111, and the service life is long.

[0054] Please combine Figure 2 and Figure 3 Optionally, the fixed column 110 further comprises a plurality of clamping seats 114, and the plurality of clamping seats 114 are distributed on the fixed rod body 1111 and the sliding rod body 1112. Each clamping seat 114 is provided with a clamping groove 1141, the center lines of the clamping grooves 1141 of the plurality of clamping seats 114 are collinear, and the center lines are parallel to the axis of the fixed column 110. One side of the sand prevention net 130 is clamped in the plurality of clamping grooves 1141 in the same vertical column.

[0055] It should be understood that the sand prevention net 130 is installed in cooperation with the plurality of clamping seats 114 arranged in the vertical column, the installation structure of the sand prevention net 130 is simple, the installation operation is convenient, and the on-site installation efficiency can be improved. Meanwhile, the plurality of clamping seats 114 cooperate to increase the fixing points of the sand prevention net 130 and improve the stability of the sand prevention net 130. Since the sliding rod body 1112 does not rotate relative to the fixed rod body 1111 when the straight rod section 111 is stretched or retracted, the positions of the plurality of clamping grooves 1141 in the same vertical column in the circumferential direction of the fixed column 110 do not change due to the length adjustment of the straight rod section 111, and the length adjustment of the straight rod section 111 does not affect the installation of the sand prevention net 130.

[0056] Optionally, the cross-sectional profile of the clamping groove 1141 is an arc shape, and the cross section is a plane perpendicular to the center line. The structure of the clamping groove 1141 is regular, which is convenient for processing. The groove wall of the clamping groove 1141 is an arc surface, which is smooth and does not have a reentrant corner line. Stress concentration is not easy to occur, and the service life is long.

[0057] In the embodiment, the sand barrier net 130 includes a net body 131 and two clamping rods 132 installed on opposite sides of the net body 131. The two clamping rods 132 are respectively matched with the adjacent two fixed columns 110, and each clamping rod 132 is clamped and matched with the plurality of clamping grooves 1141 in the same column. The clamping rod 132 is matched with the plurality of clamping grooves 114, which is convenient to install, firmly combined, and has a long service life. When the net body 131 needs to be replaced, the two clamping rods 132 are pulled out of the clamping grooves 114, and then the net body 131 is detached from the two clamping rods 132. The clamping rod 132 can be repeatedly used, thereby reducing the cost.

[0058] In the embodiment, the square unit 210 is set as a straw square. The straw square has simple structure, low cost, and good sand blocking and sand fixing effects.

[0059] It should be noted that the net body 131 can be an HDPE (high-density polyethylene) net, which has strong tensile resistance, corrosion resistance and ultraviolet radiation resistance, can adapt to harsh environmental conditions such as low temperature, strong ultraviolet radiation and strong wind in high-cold regions, and has a protection life of about 5-10 years. In addition, the straw square sand fixing measure takes local materials, can quickly form a protection system in a protection area, and plays a protection effect.

[0060] In addition, the layout range of the first sand barrier 100 is set as needed, the width can be set to 200-300 m, the height of the sand barrier net 130 can be set to 0.9-1.5 m, and the void fraction of the sand barrier net 130 can be set to 30%-50%. The width of the second sand barrier 200 can be set to about 300 m, the specification is 1 m x 1 m, and the height can be 0.3-0.4 m. The plants in the square unit 210 can be sand-fixing plants 220 mainly composed of sand plants, 3-5 plants per square meter, and the surface flowing sand is fixed. The drip irrigation system is installed in the square to ensure the growth of the plants under drought conditions. In the enclosure area, the focus is to protect the ecology and restore the vegetation. In the early stage of enclosure, all human activities that are not conducive to vegetation restoration are prohibited. In the later stage, the enclosure can be carried out according to the actual situation according to the season, that is, under certain conditions, the enclosure can be opened, and the agricultural and pastoral production activities such as grazing and mowing can be carried out in an organized manner. Techniques such as poplar branch cutting, high-pole deep planting, and afforestation are adopted to plant tree species such as poplar, white willow, willow, and tamarisk, and an effective protective forest belt is formed. The width of the forest belt is 50-100 m, and the distance between the trees is 2-3 m, so as to ensure sufficient growth space and protection effect. In the later stage, as the vegetation gradually recovers, the enclosure can be carried out according to the actual situation according to the season, that is, under certain conditions, the enclosure can be opened, and the agricultural and pastoral production activities such as grazing and mowing can be carried out in an organized manner. The enclosure effect is regularly evaluated, and the management measures are adjusted according to the actual vegetation recovery situation.

[0061] The comprehensive protection system for the wind-sand hazard region at the oasis edge of the Qaidam Basin has good sand blocking and sand fixing effects, good wind-sand control effect, and can reasonably and effectively protect the oasis edge region.

[0062] The above merely provides a specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in 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 comprehensive protection system for the oasis edge aeolian hazard area in the Qaidam Basin, which is arranged on the windward side of a farmland (002), characterized in that, The application relates to a comprehensive protection system for a wind-sand hazard region at the edge of a oasis in the Qaidam Basin, which comprises: a first sand barrier (100), a second sand barrier (200) and a sand blocking and forest growing unit (300) arranged in sequence along a main wind direction (001), wherein the sand blocking and forest growing unit (300) is arranged close to a farmland (002), the first sand barrier (100) is arranged according to the undulating topography of a sand dune, the first sand barrier (100) comprises a plurality of fixed columns (110), a plurality of windproof caps (120) and a sand blocking net (130) installed between two adjacent fixed columns (110), the plurality of windproof caps (120) are respectively and one-to-one correspondingly installed on the top of the plurality of fixed columns (110), and the second sand barrier (200) comprises a plurality of square units (210) connected in sequence and sand fixing plants (220) planted in the region surrounded by the square units (210). The fixed column (110) comprises an integral straight rod section (111) and a conical rod section (112), the conical rod section (112) is used for guiding the straight rod section (111) to be inserted into sand, an anti-pulling groove (113) is arranged on the outer circumferential surface of the straight rod section (111), the windproof cap (120) is installed on the end of the straight rod section (111), and the sand blocking net (130) is installed on the straight rod section (111). The anti-pulling groove (113) comprises a groove bottom wall (1131), a first groove side wall (1132) and two second groove side walls (1133), the groove bottom wall (1131) has an included angle with the axis of the straight rod section (111), and the groove depth of the anti-pulling groove (113) gradually decreases in the direction from the conical rod section (112) to the straight rod section (111); the first groove side wall (1132) is connected to one side of the groove bottom wall (1131) close to the conical rod section (112), and the two second groove side walls (1133) are respectively connected to the two sides of the groove bottom wall (1131) opposite in the circumferential direction of the straight rod section (111).

2. The comprehensive protection system for a wind-sand hazard region at the edge of a oasis in the Qaidam Basin according to claim 1, wherein: the number of the anti-pulling grooves (113) is multiple and the anti-pulling grooves (113) are arranged at intervals around the axis of the straight rod section (111).

3. The comprehensive protection system for a wind-sand hazard region at the edge of a oasis in the Qaidam Basin according to any one of claims 1-2, wherein: the straight rod section (111) is arranged in a telescopic structure.

4. The comprehensive protection system for a wind-sand hazard region at the edge of a oasis in the Qaidam Basin according to claim 3, wherein: ​ ​ ​ The straight rod section (111) comprises a fixed rod body (1111), a sliding rod body (1112) and a locking piece (1113), the fixed rod body (1111) is integrally formed with the tapered rod section (112); the fixed rod body (1111) is provided with a blind hole, the sliding rod body (1112) is slidably inserted into the blind hole, the locking piece (1113) is fixedly screwed with the fixed rod body (1111), and the end of the locking piece (1113) extends into the blind hole, the end of the locking piece (1113) extending into the blind hole is used for contacting the sliding rod body (1112) to limit the sliding of the sliding rod body (1112) relative to the fixed rod body (1111).

5. The comprehensive protection system of the oasis edge aeolian sand hazard area in the Qaidam Basin according to claim 4, characterized in that: The fixed column (110) further comprises a plurality of clamping seats (114), and the plurality of clamping seats (114) are distributed on the fixed rod body (1111) and the sliding rod body (1112); each clamping seat (114) is provided with a clamping groove (1141), the center lines of the clamping grooves (1141) of the plurality of clamping seats (114) are collinear, and the center lines are parallel to the axis of the fixed column (110); one side of the sand-blocking net (130) is clamped in the plurality of clamping grooves (1141) of the same vertical column.

6. The comprehensive protection system of the oasis edge aeolian sand hazard area in the Qaidam Basin according to claim 5, characterized in that: The cross-sectional profile of the clamping groove (1141) is an arc of a circle, and the cross section is a plane perpendicular to the center line.

7. The comprehensive protection system of the oasis edge aeolian sand hazard area in the Qaidam Basin according to claim 6, characterized in that: The sand-blocking net (130) comprises a net body (131) and two clamping rods (132) installed on opposite sides of the net body (131), the two clamping rods (132) are matched with adjacent two fixed columns (110) respectively, and each clamping rod (132) is clamped and matched with the plurality of clamping grooves (1141) of the same vertical column.

8. The comprehensive protection system of the oasis edge aeolian sand hazard area in the Qaidam Basin according to claim 1, characterized in that: The square grid unit (210) is set as a wheat straw square grid.

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