Hydrologic regulation device suitable for degraded desert steppe vegetation root growth guidance type

Abstract

The utility model discloses a vegetation root growth guiding type hydrologic regulation device suitable for degenerated desert steppe belongs to degenerated desert steppe ecological restoration technical field. It includes three -dimensional soil -fixing device, water supply structure, water delivery pipe, three -dimensional spraying device and grid soil layer structure, three -dimensional soil -fixing device is the open box body of top, and the internal grid soil layer structure is the curved shape that converges to three -dimensional spraying device in the middle part, and water supply structure is symmetrically arranged in the side of box body and is connected water delivery pipe, and three -dimensional spraying device is vertically fixed in the middle part top of box body, and internal pipeline is connected water delivery pipe and is equipped with double arc -shaped shower head in top. The device solves the uneven distribution of the existing device water, the weak root system guiding, the function disjointed problem, and the curved grid guides the herbaceous root system to form the soil network, and the three -dimensional water supply improves the water use efficiency, and the three -dimensional spraying device shell can also assist the growth of climbing plant, realizes the herbaceous and the climbing plant diversification adaptation.

Description

Technical Field

[0001] This utility model relates to the field of ecological restoration technology for degraded desert grasslands, specifically to a vegetation root growth-guiding hydrological regulation device suitable for degraded desert grasslands. Background Technology

[0002] The hydrological regulation and soil stabilization integrated device for degraded desert steppe vegetation restoration refers to a specialized technical equipment applied to the ecological restoration of degraded desert steppes in arid and semi-arid regions. It improves the vegetation growth environment, enhances vegetation survival rate, and strengthens soil stabilization by regulating soil moisture distribution, stabilizing surface soil structure, and guiding vegetation root growth. Its core function is to solve the problems of vegetation survival and low ecological restoration efficiency caused by drought, water shortage, loose soil, and disordered root growth in degraded desert steppes. It provides suitable water conditions and soil stabilization support for vegetation root growth, thus contributing to the restoration of degraded ecosystems.

[0003] Existing vegetation restoration devices for degraded desert steppes are mostly composed of single-function water supply components (such as simple sprinkler heads and directly buried water pipes), planar soil stabilization structures (such as straight bar grids and independent soil stabilization frames), and scattered connecting pipes. Among them, the water supply components mostly adopt a top unidirectional spraying or side single-point water supply design, the soil stabilization structures are mostly horizontally laid straight bar grids or open frames, and the water supply pipes are connected only by simple plug-in or binding methods. Some devices do not even have dedicated water control and root guidance structures. Existing devices of this type have significant shortcomings: First, the water supply method lacks a three-dimensional coordinated design. Unidirectional water supply leads to uneven water distribution, with some areas experiencing excess water while others are arid, resulting in low water use efficiency and an inability to achieve precise coupling regulation of soil and water. Second, the soil-stabilizing grid is a planar straight-line structure, only providing basic soil fixation and failing to guide plant roots to converge and grow in a specific direction. Root growth is scattered and sparse, making it difficult to form a dense soil-stabilizing root network, thus limiting the soil-stabilizing effect. Third, the soil-stabilizing structure and hydrological regulation components are independent and not integrated into a single design. Their functions are disconnected, failing to achieve the desired "root-guided-water-" effect. The existing devices lack effective sealing structures at the connection points of the water supply pipelines, making them prone to leakage and water loss, thus failing to meet the practical needs of the arid environment of desert grasslands. Furthermore, the lack of targeted drainage control structures in the soil stabilization devices prevents dynamic adjustment based on soil moisture content, leading to localized waterlogging that causes root rot or rapid evaporation that causes soil drought. Finally, the limited spraying range of the spraying components, mostly single arc or planar structures, hinders comprehensive coverage of the stabilization area, further impacting vegetation growth and restoration. These shortcomings make it difficult for the existing devices to meet the actual needs of root growth guidance and efficient hydrological regulation in degraded desert grassland vegetation. Utility Model Content

[0004] This invention aims to solve the technical problems of existing degraded desert grassland vegetation restoration devices, such as uneven water distribution, low water use efficiency, lack of vegetation root guidance function, disconnect between soil stabilization and hydrological regulation functions, poor water pipeline sealing, lack of targeted drainage control structure, and limited spraying range. It provides a vegetation root growth-oriented hydrological regulation device with integrated structure, three-dimensional water supply, clear root guidance, and precise water control, realizing the synergy between soil-water coupled regulation and orderly growth of vegetation roots, thereby improving the vegetation restoration effect and soil stabilization capacity of degraded desert grassland.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a vegetation root growth-oriented hydrological regulation device suitable for degraded desert grassland, including a three-dimensional soil stabilization device, several water supply structures set on the three-dimensional soil stabilization device, a water supply pipe connected to the water supply structures, and a three-dimensional spraying device set above the three-dimensional soil stabilization device. The three-dimensional soil stabilization device is a box structure with an open top. It is made of corrosion-resistant and anti-aging polyethylene material. The box is 2-3m long, 1.5-2m wide, and 0.8-1.2m high. The inside is laid with a grid soil layer structure to guide water and plant roots. The grid soil layer structure is curved and converges towards the three-dimensional spraying device in the middle. The curvature is 15-30°. It is composed of several parallel grid strips. The grid strips are made of high-strength fiberglass and have a diameter of 8-12mm. The spacing between adjacent grid strips is 5-8cm, forming channels for water penetration and root growth. The water supply structure is located on the side of the three-dimensional soil stabilization device, with 2-3 sets symmetrically arranged on each side. It is connected to the water supply pipe to transport water. It includes a multi-way valve and several water supply branch pipes connected to the multi-way valve. The diameter of the water supply branch pipe is 20-30mm, and the end is provided with 3-4 sets of water spray heads with an orifice diameter of 1-2mm. The multi-way valve is connected to the water supply pipe through a connecting pipe with a diameter adapted to the water supply pipe. The connecting pipe is provided with a manual valve for controlling the on / off state. The water supply pipe includes several interconnected pipe sections. The pipe sections are made of PVC material and have a diameter of 40-50mm. Adjacent pipe sections are connected by threaded elbows with thread specifications of M40-M50. The pipe sections are provided with annular flanges for sealing. The thickness of the annular flanges is 3-5mm, which fit tightly against the inner wall of the elbows to achieve a seal. The three-dimensional spraying device is a columnar structure with an open top. The column diameter is 15-20cm and the height is 1.5-2m. The material is the same as that of the three-dimensional soil stabilization device. The top is equipped with a double arc-shaped nozzle to expand the spraying range. The double arc-shaped nozzle consists of two symmetrically arranged arc-shaped plates with an arc angle of 60-90°. Several spray holes are distributed on the arc-shaped plates. The diameter of the spray holes is 1.5-2.5mm and the spacing is 3-5cm. The three-dimensional spraying device has a water supply pipe with a diameter of 30-40mm. The bottom of the pipe is connected to the water supply pipe. There are 3-4 vertical water supply branch pipes with a diameter of 20-25mm on the pipe. The branch pipes are connected to the inner wall of the three-dimensional spraying device by a fixing member. The fixing member is an arc-shaped buckle and the top is connected to the double arc-shaped nozzle. The bottom of the housing of the three-dimensional soil stabilization device is equipped with a drainage pipe with a diameter of 30-40mm. The drainage pipe is equipped with a control valve, which is a ball valve, for adjusting the drainage flow.

[0006] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages compared with the prior art: This device, through the synergistic design of a three-dimensional soil stabilization device and a grid soil layer structure, not only stabilizes the surface soil and prevents soil loss caused by wind erosion in desert grasslands, but also guides the roots of vegetation to converge and grow towards the central three-dimensional spraying device, forming a dense soil stabilization root network, which significantly improves the soil stabilization effect and solves the problems of existing soil stabilization structures lacking root guidance function and having scattered root growth. The system adopts a three-dimensional water supply mode that combines a side water supply structure with a top three-dimensional spraying device. The water supply structure achieves precise side water delivery through multiple sets of spray heads, while the double arc-shaped spray heads of the three-dimensional spraying device expand the top spraying range. Combined with the water guiding effect of the grid soil layer structure, it achieves uniform distribution of soil moisture, improves water use efficiency, and solves the problems of single water supply mode and uneven water distribution in existing devices. The water supply pipe uses a threaded elbow and an annular flange to achieve a sealed connection between the pipe bodies, effectively preventing water leakage and loss. This meets the needs of the arid and water-scarce environment of degraded desert grasslands and makes up for the poor sealing of the existing water supply pipeline. The bottom of the three-dimensional soil stabilization device is equipped with drainage pipes and control valves, which can dynamically adjust the drainage flow according to the soil moisture content, avoiding local water accumulation that could lead to root rot or rapid evaporation that could lead to soil drought. This achieves precise coupling control of soil and water, solving the problem of the lack of water control structure in existing devices. The device adopts an integrated design of "three-dimensional soil stabilization - three-dimensional water supply - root guidance - water regulation". All components work together to achieve an organic combination of soil stabilization and hydrological regulation functions, solving the problems of functional disconnect and low restoration efficiency of existing devices, and significantly improving the survival rate of degraded desert grassland vegetation and ecological restoration effect.

[0007] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0008] Figure 1 This is a three-dimensional schematic diagram of the soil-moisture coupling regulation three-dimensional soil stabilization device for vegetation degradation restoration according to this utility model. Figure 2 This is a schematic diagram of the water supply structure of part A of the three-dimensional soil stabilization device for vegetation degradation restoration using soil-water coupling regulation. Figure 3 This is a partial enlarged view of the water delivery pipe of the three-dimensional soil stabilization device for vegetation degradation restoration using soil-water coupling regulation according to this utility model. Figure 4 This is a schematic diagram of the internal structure of the three-dimensional spraying device of the three-dimensional soil stabilization device for vegetation degradation restoration using soil-moisture coupling regulation. Figure 5 This is a schematic diagram of the usage status of the three-dimensional soil stabilization device for vegetation degradation restoration using soil-moisture coupling regulation.

[0009] As shown in the figure: 1. Three-dimensional soil stabilization device; 2. Water supply structure; 3. Water delivery pipe; 4. Three-dimensional spraying device; 5. Geogrid soil layer structure; 6. Pipeline. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0011] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0012] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0013] A vegetation root growth-oriented hydrological regulation device suitable for degraded desert steppe includes a three-dimensional soil stabilization device 1, a water supply structure 2, a water conveyance pipe 3, a three-dimensional spraying device 4, a grid soil layer structure 5, and a pipeline 6.

[0014] like Figure 1 As shown, the three-dimensional soil stabilization device 1 is a polyethylene box with an open top (2.5m in length, 1.8m in width, and 1m in height), with its bottom tightly attached to the surface of the degraded desert grassland area to be restored; the three-dimensional spraying device 4 is a columnar structure with an open top (18cm in diameter and 1.8m in height), vertically fixed above the geometric center of the three-dimensional soil stabilization device 1; four sets of water supply structures 2 are symmetrically distributed on the left and right side walls of the three-dimensional soil stabilization device 1, and each set is connected to the water supply pipe 3 through a connecting pipe; the water supply pipe 3 is laid along the outer side wall and bottom of the three-dimensional soil stabilization device 1, with one end connected to an external water source and the other end branching to connect the water supply structure 2 and the internal pipe 6 of the three-dimensional spraying device 4; the grid soil layer structure 5 is laid inside the three-dimensional soil stabilization device 1, consisting of parallel fiberglass grid strips (6cm apart), which converge towards the central three-dimensional spraying device 4 in a 20° curved shape.

[0015] During implementation, the edge of the three-dimensional soil stabilization device 1 needs to be embedded 5-10cm into the ground surface to enhance stability, and the curvature of the grid soil layer structure 5 must be precisely aligned with the three-dimensional spraying device 4. The innovation lies in breaking through the existing device's separate "water supply-soil stabilization-root system" design. Through an integrated layout of "main body + central spraying + side water supply + internal guidance," it achieves a deep integration of hydrological regulation and root guidance. Simultaneously, the columnar outer shell of the three-dimensional spraying device 4 can serve as an attachment carrier for climbing plants, providing support for diversified plant cultivation. Specifically, the three-dimensional soil stabilization device 1 solves the problem of poor stability in planar soil stabilization structures, providing a foundation for vegetation growth; the curved grid soil layer structure 5 specifically guides the convergence of herbaceous roots, solving the problem of scattered roots and forming a dense soil stabilization network; the spatial distribution of the three-dimensional spraying and side water supply solves uneven water distribution, achieving "top + side" three-dimensional water supply, upgrading the device from a single-function unit to a collaborative integrated equipment.

[0016] like Figure 2As shown, the water supply structure 2 includes a three-way valve, three water supply branch pipes (pipe diameter 25mm) and three sets of water spray heads (orifice diameter 1.5mm) at the end; the three-way valve is fixed to the reserved interface on the side of the three-dimensional soil stabilization device 1 by bolts, one side interface is connected to the water supply pipe 3 through the connecting pipe, and the other two side interfaces are connected to the water supply branch pipes; a manual valve is connected in series in the middle of the connecting pipe; the water supply branch pipe extends laterally to the top of the grid soil layer structure 5 inside the three-dimensional soil stabilization device 1, and the water spray head faces the soil surface.

[0017] During installation, the extension length of the water supply branch pipe needs to be adjusted to ensure that the sprinkler heads cover 1 / 3 of the side area, and the exposed manual valve handle is easy to operate. The innovation lies in the "tiered water supply + independent control" design, which addresses the shortcomings of existing water supply components that cannot be adjusted as needed. The three-way valve allows water to be distributed to multiple branch pipes, and multiple sets of sprinkler heads expand the side water delivery range, avoiding single-point drought; the manual valve can independently control the on / off state and water volume of a single water supply unit according to the vegetation growth stage or soil moisture content, making water replenishment more targeted and improving water use efficiency in arid environments.

[0018] like Figure 3 As shown, water pipe 3 is made of PVC pipe (diameter 45mm), and adjacent pipes are connected by M45 threaded elbows; the end of the pipe is integrally formed with an annular flange (thickness 4mm), the outer diameter of the flange is slightly larger than that of the pipe, and it fits tightly with the end face of the threaded elbow; the inner thread of the elbow meshes with the outer thread of the pipe to form a detachable connection.

[0019] During assembly, corrosion-resistant sealant must be applied to the threaded joints to ensure there are no gaps between the flange and the elbow end face. After assembly, a 0.3MPa pressure test should be performed (hold pressure for 30 minutes without leakage). The innovation lies in the dual leak-proof structure of "threaded connection + annular flange seal," solving the leakage problem of existing pipelines. The threaded connection ensures pipeline stability under wind force, while the annular flange blocks water leakage from the thread gaps, reducing water loss by more than 30%. This design is suitable for arid desert and grassland environments, ensuring efficient water delivery to all water supply components.

[0020] like Figure 4 As shown, the bottom of the columnar outer shell of the three-dimensional spraying device 4 is fixed to the middle of the three-dimensional soil stabilization device 1; the internal pipe 6 (diameter 35mm) is vertically set along the central axis of the outer shell, and the bottom extends out of the outer shell to connect to the water supply pipe 3; three vertical water supply branch pipes (diameter 22mm) are evenly distributed on both sides of the internal pipe 6, and are welded together at the bottom. The middle part is fixed to the inner wall of the outer shell by an arc-shaped buckle, and the top is connected to a double arc-shaped nozzle; the double arc-shaped nozzle is composed of two symmetrical 75° arc-shaped plates, and spray holes with a diameter of 2mm and a spacing of 4cm are evenly distributed on the plate surface.

[0021] During installation, ensure that the vertical branch pipes are perpendicular to the internal pipes 6, and that the double-arc sprinklers are symmetrically distributed to cover the entire area. The innovation lies in the combination of an "internal water supply network + double-arc sprinklers," solving the problem of limited spraying range in existing systems. The internal pipes and vertical branch pipes form a distribution network, ensuring even water distribution; the arc-shaped clips prevent water flow impact from causing branch pipe swaying, improving water supply stability; the double-arc sprinklers achieve 360° all-around spraying, increasing the coverage area by 50% compared to a single arc sprinkler, and the evenly distributed spray holes ensure consistent water mist density, guaranteeing a balanced supply of moisture to the central and surrounding soil areas.

[0022] like Figure 5 As shown (the effect in the figure is for illustrative purposes only), the edge of the three-dimensional soil stabilization device 1 is embedded 5-10cm into the ground surface, and the bottom is in close contact with the surface soil. The roots of the herbaceous plants planted inside the three-dimensional soil stabilization device 1 grow directionally along the strip channels of the grid soil structure 5. At the same time, the roots of climbing plants are attached to the columnar shell of the three-dimensional spraying device 4. The roots of the climbing plants are assisted in climbing growth by the shell, forming a dual plant growth pattern of "herbaceous root soil stabilization + climbing root attachment". The external water source is split into the water supply structure 2 and the three-dimensional spraying device 4 through the water supply pipe 3. The water supply structure 2 sprays water to the herbaceous plant area on the side, and the three-dimensional spraying device 4 sprays water mist to the top and the surrounding area. Part of the water seeps into the herbaceous plant root area along the grid channels, and part of it is directly supplied to the climbing plants. The drainage pipe (35mm in diameter) at the bottom of the three-dimensional soil stabilization device 1 extends horizontally out of the box. The ball valve on the pipe is in a half-open state, and the drainage flow rate is adjusted according to the soil moisture content.

[0023] During use, soil moisture content needs to be checked regularly with an insertion-type hygrometer. When the moisture content is above 25%, the ball valve should be opened to drain water; when it is below 10%, the water retention valve should be closed. When planting herbaceous plants, align the seedling roots with the grid channels, and plant climbing plant seedlings close to the four columnar shells of the three-dimensional spraying device. The innovation lies in achieving a closed-loop process of "herbaceous root guidance - three-dimensional water supply - water regulation - soil stabilization synergy + climbing plant assistance," which not only solves the problem of low restoration efficiency of existing devices, but also demonstrates the adaptability of this device to diverse plants such as herbaceous and climbing plants through the attachment and cooperation of climbing plant roots with the columnar shells. The box body is embedded in the ground to enhance wind erosion resistance, the grid guides the herbaceous roots to form a dense soil stabilization network (increasing soil stabilization strength by 40%), the three-dimensional water supply meets the water needs of both types of plants simultaneously (increasing water use efficiency by 35%), drainage control prevents root rot or soil drought, and the synergy of multiple structures increases the survival rate of herbaceous vegetation from 45% to over 75%, and the survival rate of climbing plants reaches 80%, achieving efficient and diversified ecological restoration.

[0024] To ensure efficient collaboration between this invention and existing technologies in various degraded desert-steppe scenarios, the following details the linkage installation of the device with existing technologies and the usage status of each structure, considering three typical restoration scenarios: mild, moderate, and extreme drought-induced wind erosion. I. Mildly degraded desert steppe scene (vegetation coverage 15%-30%, low soil looseness) Scenario characteristics: Existing restoration methods mostly use a basic configuration of simple drip irrigation tape + flat grid, which suffers from insufficient water supply and weak root guidance. Integration with existing technology: Connect the water supply pipe 3 of this device to the existing drip irrigation tape main pipe (50mm diameter) via a reducing connector, retaining the original drip irrigation tape as an auxiliary water supply; the three-dimensional soil stabilization device 1 is directly laid on top of the existing flat grid, with the edge of the box aligned with the existing sand barrier (such as straw checkerboard) on the ground surface, and the box is fixed to the sand barrier using U-shaped ground nails.

[0025] Usage status of each structure: Three-dimensional soil stabilization device 1: The bottom of the box is tightly fitted with the original flat grid, the curvature of the grid soil layer structure 5 laid inside is adjusted to 15° (slight guidance), the gaps between the grid strips are filled with 5cm thick local topsoil, and at the same time, semi-drought tolerant climbing plants such as *Ligustrum lucidum* are planted around the outer shell of the three-dimensional spraying device 4. Water supply structure 2: Only two sets on one side are opened, the manual valve opening is adjusted to 1 / 2, and the water nozzle (orifice diameter 1.5mm) is directed towards the roots of the original vegetation, forming a "side + root" dual water supply with the drip irrigation tape; 3D Spraying Device 4: The angle of the double arc nozzles is lowered by 10°, and the flow rate of the spray holes is adjusted to medium-low. Spray once a day from 9:00 to 10:00. The water mist can replenish the roots of both herbaceous plants and climbing plants. Water pipe 3: Apply weather-resistant sealant to the threaded elbow connection, and ensure that the annular flange fits tightly with the elbow to ensure that the drip irrigation tape water source does not leak into this device; Drainage pipes: Control valves should be kept at 1 / 4 opening to promptly drain small amounts of excess water and prevent soil compaction.

[0026] Building upon existing drip irrigation tape, this device enhances herbaceous root growth through grid guidance, while three-dimensional spraying caters to the water needs of climbing plants, resulting in a richer vegetation community.

[0027] II. Moderately degraded desert steppe scene (vegetation coverage 5%-15%, significant soil wind erosion). Scenario characteristics: Existing technologies commonly use mobile sprinkler irrigation machines combined with chemical sand-fixing agents (such as polyacrylamide), which suffer from poor coupling between the sand-fixing agent and water, and limited irrigation range. Integration with existing technology: The internal pipes 6 of the three-dimensional sprinkler device 4 are connected to the existing mobile sprinkler irrigation machine's outlet pipe (40mm diameter) via a three-way valve, with the sprinkler irrigation machine serving as a backup water source for this device. A 2cm thick layer of existing chemical sand-fixing agent is laid at the bottom of the three-dimensional soil-fixing device 1, and 20cm high windbreaks are installed around the box. The windbreaks are connected to the device via slots, forming an integrated "sand-fixing-windproof-water supply" area.

[0028] Usage status of each structure: Three-dimensional soil stabilization device 1: The box is embedded 10cm into the ground surface, the bottom sand stabilizing agent layer is in close contact with the grid soil layer structure 5, the grid bending arc is adjusted to 25° (medium guidance), and herbaceous plants such as Artemisia are sown in the gaps between the grid strips. The outer shell of the three-dimensional spraying device 4 is wrapped with biodegradable hemp rope to assist the climbing plant Hippophae rhamnoides (vine variant) to attach. Water supply structure 2: All 4 sets on both sides are opened, the manual valves are fully opened, and the water nozzles (orifice diameter 2mm) spray upward at a 30° angle to the horizontal direction to moisten the soil above the sand-fixing agent layer to a depth of 10cm. 3D Sprinkler System 4: The double arc nozzles are adjusted to a horizontal angle, and the spray flow rate is set to a high level. It is activated synchronously with the mobile sprinkler to ensure a balanced water supply for both climbing and herbaceous plants. Water pipe 3: A T-shaped threaded elbow is used to achieve three-way diversion of "sprinkler irrigation machine - water supply structure - three-dimensional spraying device", and the sealing pressure of the annular flange is increased to 0.4MPa to prevent high-pressure water leakage; Drainage pipes: The control valve is adjusted according to the solidification requirements of the sand-fixing agent. The valve is closed to retain water within 24 hours after the sand-fixing agent is sprayed, and then adjusted to 1 / 3 opening for drainage after solidification.

[0029] This device precisely couples the water from the sprinkler irrigation machine with the sand-fixing agent. The grid guides the herbaceous roots to penetrate the sand-fixing agent layer, and the climbing plants grow along the outer shell to further enhance the ground cover.

[0030] III. Extremely arid wind erosion areas (vegetation coverage < 5%, annual precipitation < 200 mm) Scenario characteristics: Existing restoration methods rely on rainwater harvesting cisterns (5-10m³ volume) + drip irrigation capillary tubes, which suffer from low rainwater utilization and root dehydration leading to root death. Integration with existing technology: One end of the water delivery pipe 3 is connected to the bottom outlet (32mm diameter) of the rainwater harvesting cistern via a submersible pump. The submersible pump power matches the water delivery pipe flow rate (1.5m³ / h). The three-dimensional soil stabilization device 1 contains three layers of permeable membranes (of the same material as the existing drip irrigation capillary tubes). These permeable membranes are sandwiched between the grid soil layer structure 5, and the drip irrigation capillary tubes are laid along the gaps in the grid strips, forming a "membrane-pipe-grid" water conduction system with the permeable membranes.

[0031] Usage status of each structure: Three-dimensional soil stabilization device 1: The box body is made of thickened polyethylene material (8mm thick), and a 10cm thick gravel filter layer is laid at the bottom. The curvature of the grid soil layer structure 5 is adjusted to 30° (strong guidance). Drought-resistant herbaceous sea buckthorn is planted in the gaps between the grid strips. The outer shell of the three-dimensional spraying device 4 is sprayed with ecological adhesive to assist the root system of drought-resistant climbing plant camel thorn (vine variant) to attach. Water supply structure 2: All 4 sets on both sides are fully open, the manual valve opening is adjusted to 3 / 4, and the water spray head is replaced with an atomizing nozzle (1mm orifice) to spray water mist above the grille to increase air humidity; Three-dimensional spraying device 4: The angle of the double arc nozzle is increased by 15°, the flow rate of the spray hole is adjusted to the low level, and the rainwater collection cellar water source is used to spray once in the morning and once in the evening (30 minutes each time), forming a combination of "atomization humidification + root drip irrigation" with the drip irrigation capillary tube, which simultaneously meets the needs of two types of drought-resistant plants. Water pipe 3: The pipe body is wrapped with insulation cotton (5mm thick) to prevent the pipe from breaking due to extreme temperature difference. Sandproof sleeves are installed at the threaded elbows to prevent wind and sand from entering the connection gap. Drainage pipes: The control valve is normally closed, and is only opened to 1 / 5 degree when the rainwater collection cistern is overfilled, so that the drainage is directed into the surrounding collection ditch to realize rainwater recycling.

[0032] By linking the rainwater collection cisterns with the "water storage-transportation-guidance" of this device, the rainwater utilization rate is increased from the current 30% to 55%. The grid and the permeable membrane work together to maintain the soil moisture content of herbaceous roots, and climbing plants grow along the outer shell to form vertical cover.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

[0034] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A vegetation root growth-oriented hydrological regulation device suitable for degraded desert steppes, characterized in that, It includes a three-dimensional soil stabilization device (1), several water supply structures (2) installed on the three-dimensional soil stabilization device (1), a water supply pipe (3) connected to the water supply structure (2), and a three-dimensional spraying device (4) installed above the three-dimensional soil stabilization device (1); The three-dimensional soil stabilization device (1) is a box structure with an open top. Inside it is a grid soil layer structure (5) for guiding water and plant roots. The grid soil layer structure (5) is curved and converges towards the three-dimensional spraying device (4) in the middle. The water supply structure (2) is located on the side of the three-dimensional soil stabilization device (1) and is connected to the water supply pipe (3) to transport water. The three-dimensional spraying device (4) is a columnar structure with an open top. It has a double arc nozzle at the top for expanding the spraying range and a water pipe (6) inside. The bottom of the pipe (6) is connected to the water pipe (3).

2. The vegetation root growth-guided hydrological regulation device suitable for degraded desert steppes according to claim 1, characterized in that, The water supply pipe (3) includes several interconnected pipe sections, adjacent pipe sections are connected by threaded elbows, and the pipe sections are provided with annular flanges for sealing.

3. The vegetation root growth-guided hydrological regulation device suitable for degraded desert steppes according to claim 1, characterized in that, The water supply structure (2) includes a multi-way valve and several water supply branch pipes connected to the multi-way valve. The ends of the water supply branch pipes are provided with multiple sets of water spray heads. The multi-way valve is connected to the water supply pipe (3) through a connecting pipe. The connecting pipe is provided with a manual valve for controlling the on / off state.

4. The vegetation root growth-guided hydrological regulation device suitable for degraded desert steppes according to claim 1, characterized in that, The three-dimensional spraying device (4) has several vertical water supply branches on its internal pipes (6). The water supply branches are connected to the inner wall of the three-dimensional spraying device (4) through fixing parts, and the top of the branches is connected to the double arc nozzle.

5. The vegetation root growth-guided hydrological regulation device suitable for degraded desert steppes according to claim 1, characterized in that, The grid soil structure (5) of the three-dimensional soil stabilization device (1) is composed of several parallel grid strips, and channels for water infiltration and root growth are formed between the grid strips.

6. The vegetation root growth-guided hydrological regulation device suitable for degraded desert steppes according to claim 1, characterized in that, The bottom of the box of the three-dimensional soil stabilization device (1) is provided with a drainage pipe (6), and a control valve is provided on the drainage pipe.

7. The vegetation root growth-guided hydrological regulation device suitable for degraded desert steppes according to claim 1, characterized in that, The dual-arc nozzle consists of two symmetrically arranged arc-shaped plates, on which a number of spray holes are distributed.

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