Device and method for draining surrounding loess through integration of solar electric heating boiler, electric high-temperature high-pressure steam and loess hole circulation

Abstract

The invention belongs to the technical field of slope ecological management, and particularly relates to a device and method for circularly draining surrounding loess by integrating a solar electric heating boiler, electric high-temperature and high-pressure steam and loess holes. According to the device, a greening module is arranged on the slope surface of a slope and used for protecting and reinforcing the surface layer of the slope, and a high-temperature module is arranged on the slope top of the slope and used for generating high temperature; the solar module is used for generating electricity, storing electric energy and supplying power to the high-temperature module and the greening module, the high-temperature module comprises a high-temperature and high-pressure electric heating boiler, a pressure controller is assembled in the high-temperature and high-pressure electric heating boiler, and a steam outlet is further formed in the outer side of the high-temperature and high-pressure electric heating boiler. According to the method, erosion of running water to the loess slope can be reduced, an ecological environment with a stable growth environment and sufficient water resources is provided for plants on the loess slope, the slope is further reinforced, and therefore the influence of natural landscapes on the ecological environment of the loess slope can be restored.

Description

Technical Field

[0001] This invention belongs to the field of slope ecological management technology, specifically involving an integrated solar-powered electric boiler-electric high-temperature and high-pressure steam-loess hole circulation device and method for draining surrounding loess. Background Technology

[0002] The Loess Plateau is a typical arid region with scarce but concentrated rainfall. At the same time, the artificially excavated loess slopes have high and steep gradients. Due to the low vegetation cover on the ground and slopes, they are often subjected to intense erosion by rainwater. The slope shoulders are significantly affected by rainwater infiltration. Because the loess slopes are loose and highly plastic, they are easily affected by water and external forces, which can trigger geological disasters. Common geological hazards include landslides, mudslides, and debris flows, especially in densely populated areas such as highways, railways, reservoirs, and urban areas. These geological hazards not only damage land and farmland and pose potential risks to engineering safety, but also threaten the safety of life and property. If the erosion of slopes by flowing water is not dealt with in time, it can easily cause slope slippage, leading to increased soil erosion and impacting the natural ecology. Therefore, the impact of rainfall in the Loess Plateau region cannot be ignored. Traditional slope protection projects, such as riprap, dry-laid stone, mortar-grouted riprap, concrete, geomembrane bag concrete, and rope hinge concrete slab slope protection, can ensure the stability of loess slopes and the basic functions of flood control and drainage to a certain extent. However, they rarely restore the impact of natural vegetation on the local ecological and landscape environment. At the same time, the project cost is relatively high, the construction is difficult, and regular maintenance and continuous repair are required in the later stage. Therefore, it is necessary to provide a new technology that utilizes high-temperature and high-pressure steam from a solar-powered electric boiler to circulate and drain the surrounding loess. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated solar-powered electric boiler-high-temperature and high-pressure steam-loess hole circulation system and method for draining surrounding loess. This system can reduce the erosion of loess slopes by flowing water, provide a stable and water-rich ecological environment for plants on loess slopes, further reinforce the slopes, and thus restore the impact of natural landscapes on the ecological environment of loess slopes.

[0004] The specific technical solution adopted by this invention is as follows: A device integrating a solar-powered electric boiler, high-temperature and high-pressure steam, and a loess pore circulation system for draining surrounding loess is installed on a slope surface. Greening modules are used for surface protection and reinforcement of slopes; Set at the top of the slope: High-temperature module, used to generate high temperatures; The solar module is used to generate and store electrical energy to power the high-temperature module and the greening module.

[0005] The high-temperature module includes a high-temperature and high-pressure electric boiler, which is equipped with a pressure controller. A steam outlet is also provided on the outside of the high-temperature and high-pressure electric boiler. Multiple underground column holes are provided in the top of the slope. Steam is transported to the underground column holes through a pipe from the steam outlet. An electrical control box and a water level controller are also provided on the outside of the high-temperature and high-pressure electric boiler. A burner is located inside the pressure controller and near its bottom. It also includes an oil tank and a water tank. The oil tank is connected to the burner via a pipe, and the water tank is connected to the interior of the high-temperature and high-pressure electric boiler via a pipe.

[0006] The solar module includes multiple components that make up a solar panel, and lenses are laid on the outer surface of the multiple components. One of the components is also equipped with a dual-axis tracker. It also includes a battery and a grid-connected inverter, the battery being used to store electrical energy, and the grid-connected inverter being electrically connected to the high-temperature module.

[0007] The greening module includes a first electric water suction device, which is installed at the top of the slope. The first electric water suction device is electrically connected to the grid-connected inverter. The output end of the first electric water suction device is connected to a first water supply pipe, which extends to the slope and the top of the slope. Multiple capillary drip irrigation pipes are connected to the outside of the first water supply pipe. It also includes greenery planted on the slope and at the top of the slope, and a first sand well and ditch set at the bottom of the slope, with the end of the first water pipe extending away from the first electric water suction device into the first sand well or the ditch.

[0008] A method for using an integrated solar-electric boiler-high-temperature-high-pressure steam-loess circulation and desiccation device for surrounding loess, the method employing the aforementioned device, and the method includes the following steps: Step 1: Level the slope surface and top; Step 2: Install solar modules on the hilltop and electrically connect them to the high-temperature module and the first electric water suction device via a grid-connected inverter; Step 3: Dig underground column holes below the high-temperature module; Step 4: Install a high-temperature module at the top of the slope, and guide the exhaust steam into the underground column borehole; Step 5: Plant greenery on the slope; Step Six: Construct the first sand well and ditch at the bottom of the slope, bury the first water supply pipe on the slope, install the first electric water suction device at the top of the slope, and connect the output end of the first electric water suction device to the port of the first water supply pipe. Step 7: Lay capillary drip irrigation pipes on the slope and connect them to the first water supply pipe to irrigate the green plants using drip irrigation technology.

[0009] The solar module includes a solar power panel, the high temperature module includes an air heating device, a condenser is installed on the outside of the air heating device, a condensate tank is also set at the top of the slope next to the air heating device, and the condenser and the condensate tank are connected by a pipe so that the water condensed by the condenser is introduced into the condensate tank. A second electric water suction device is installed at the top of the slope. The input end of the second electric water suction device is connected to a second water supply pipe. A second sand well is set at the bottom of the slope. Another condensate pit is set next to the second sand well to collect rainwater. The end of the second water supply pipe away from the second sand well extends into the two condensate pits. Multiple drippers are set on the outside of the second water supply pipe. Multiple embankments are set on the slope surface.

[0010] A method for integrating a solar-powered electric boiler, high-temperature and high-pressure steam, and a loess pore circulation system to desiccate surrounding loess, the method comprising the following steps: A1: Choose a suitable location to install solar panels and ensure sufficient sunlight. A2: Install air heating equipment near the loess slope and connect the solar panels to the energy storage equipment or directly to the air heating equipment to ensure that it can receive the power provided by the solar panels. A3: Install a condenser near the air heating equipment to collect moisture from the air; A4: Excavate a second sand well at the bottom of the loess slope to below the groundwater level to ensure that the second sand well can collect groundwater, and build a condensate pit to collect rainwater and condensate. A5: Lay drip irrigation tape or install drippers on loess slopes.

[0011] The technical effects achieved by this invention are as follows: This invention utilizes a self-circulating ecological governance system structure that integrates planting vegetation and water storage, extraction, and drip irrigation. This system ensures the full recycling of water resources, reduces water erosion on loess slopes, and provides a stable and water-rich ecological environment for plants on loess slopes. Simultaneously, the roots of the vegetation absorb water and release calcium and magnesium ions, further reinforcing the slopes. This restores the natural landscape's influence on the ecological environment of loess slopes, solves the problem of soil erosion caused by irregular seasonal rainfall in loess areas, and addresses the difficulty of reinforcing loess slopes through planting vegetation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the technology for overall vegetation restoration and loess restoration in this invention; Figure 2 This is a structural diagram of each component of the high-temperature module in this invention; Figure 3 This is a structural diagram of each component of the solar module in this invention; Figure 4 This is a structural diagram of each component of the greening module in this invention; Figure 5 This is a schematic diagram of the underground column borehole in this invention; Figure 6 This is a schematic diagram of the construction steps in the method of this invention; Figure 7 These are technical schematic diagrams of Embodiments 4 and 5 of the present invention.

[0013] The following is a list of components represented by each label in the attached diagram: 1. Pressure controller; 2. Electrical control box; 3. Steam outlet; 4. Oil tank; 5. Water level controller; 6. Water tank; 7. Burner; 8. Components; 9. Lens; 10. Dual-axis tracker; 11. Battery; 12. Grid-connected inverter; 13. First electric water suction device; 14. First water delivery pipe; 15. Capillary drip irrigation pipe; 16. Green plants; 17. First sand well; 18. Ditch; 19. Underground column borehole; 20. Air condensate collector; 21. Loess vegetation restoration plants; 22. Input air and circulating steam; 23. Solar panel; 24. Air heating equipment; 25. Condenser; 26. Condensate cellar; 27. Second sand well; 28. Embankment; 29. ​​Second electric water suction device; 30. Second water delivery pipe; 31. Dripping head. Detailed Implementation

[0014] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0015] Example 1: See appendix Figure 1-5 As shown, an integrated solar-powered electric boiler-high-temperature, high-pressure steam-loess circulation system is used to desiccate surrounding loess. One embodiment of this system can be installed on loess slopes to improve soil quality and vegetation restoration. Specifically, it is installed on the slope surface. Greening modules are used for surface protection and reinforcement of slopes; Set at the top of the slope: High-temperature module, used to generate high temperatures; Solar modules are used to generate and store electrical energy to power high-temperature and greening modules. The high-temperature module includes a high-temperature and high-pressure electric boiler, which is equipped with a pressure controller 1. A steam outlet 3 is also provided on the outside of the high-temperature and high-pressure electric boiler. Multiple underground column holes 19 are provided in the top of the slope. Steam is transported to the underground column holes 19 through a pipe through the steam outlet 3. A solenoid valve can be installed on the inside of the steam outlet 3 to open and close the steam outlet 3 and transport steam to the underground column holes 19 at regular intervals. An electric control box 2 and a water level controller 5 are also provided on the outside of the high-temperature and high-pressure electric boiler. The electric control box 2 allows the user to adjust the contents of the high-temperature and high-pressure electric boiler by operating the electric control box 2. The water level controller 5 allows the user to adjust the liquid level in the high-temperature and high-pressure electric boiler. A burner 7 is located inside the pressure controller 1 and near its bottom. It also includes an oil tank 4 and a water tank 6. The oil tank 4 is used to supply fuel to the burner 7, and the water tank 6 is used to supply water to the high-temperature and high-pressure electric boiler. The oil tank 4 is connected to the burner 7 through a pipe, and the water tank 6 is connected to the inside of the high-temperature and high-pressure electric boiler through a pipe. By connecting the underground column borehole 19 to a high-temperature and high-pressure steam electric boiler, high-temperature and high-pressure steam can be introduced into the loess hole for circulation, improving the loess around the underground column borehole 19 and increasing the strength of the structural loess. The solar module includes multiple components 8 that make up the solar panel. The multiple components 8 are spliced ​​together to form the entire solar panel. Lenses 9 are laid on the outer surface of the multiple components 8. The setting of the lenses 9 can improve the energy conversion efficiency of solar energy. A dual-axis tracker 10 is also set on one of the components 8. This dual-axis drive is used to drive the overall angle of component 8, which is adjusted in real time according to the position of the sun; It also includes a battery 11 and a grid-connected inverter 12. The battery 11 is used to store electrical energy, and the grid-connected inverter 12 is electrically connected to the high-temperature module. The battery 11 is used to store the collected electrical energy, and the grid-connected inverter 12 is used to connect to other modules. To ensure installation stability, the solar module can be supported by a 25mm diameter tripod, which can effectively resist wind forces. The greening module includes a first electric water suction device 13, which is installed at the top of the slope. The first electric water suction device 13 is electrically connected to the grid-connected inverter 12. The output end of the first electric water suction device 13 is connected to a first water supply pipe 14, which extends to the slope and the top of the slope. Multiple capillary drip irrigation pipes 15 are connected to the outside of the first water supply pipe 14. It also includes green plants 16 planted on the slope and the top of the slope to accelerate the absorption of water in the loess slope, release more ions to reinforce the slope, and accelerate the restoration of the ecological environment on the loess slope. A first sand well 17 and a ditch 18 are set at the bottom of the slope. The end of the first water pipe 14 away from the first electric water suction device 13 extends into the first sand well 17 or the ditch 18. By collecting water into the ditch 18 at the bottom of the slope, or by setting up the first sand well 17, the erosion of the slope by water can be reduced, the impact of slope slippage on the ecology can be prevented, and the water resources stored in the first sand well 17 and the ditch 18 can be recycled, so as to achieve full utilization of water resources, provide stable water resources for the growth of vegetation on the loess slope, and then use the root anchoring effect of the interaction between plants and loess to protect and reinforce the surface of the loess slope.

[0016] Example 2: See appendix Figure 6 As shown, a method for dewatering surrounding loess using an integrated solar-powered electric boiler, high-temperature and high-pressure steam, and loess pore circulation includes the following steps: Step 1: Level the slope to facilitate the installation of the device modules, such as the solar module and the high-temperature module; Step 2: Install solar modules on the top of the slope and connect them to the high-temperature module and the first electric water suction device 13 via grid-connected inverter 12. Solar energy is converted into electrical energy by components such as component 8 and stored inside battery 11. The grid-connected inverter 12 is configured to transmit electrical energy to other components. Step 3: Excavate underground column holes 19 below the high-temperature module. Multiple underground column holes 19 can be excavated to improve the soil quality of loess in multiple areas. The diameter of the underground column holes 19 is 16cm, and the depth is equal to the height of the slope. There is a 2m interval between every two adjacent underground column holes 19. The range of loess drainage is reasonably set so that the internal moisture of the loess can be drained evenly. Step 4: Install a high-temperature module at the top of the slope, supply water to the high-temperature and high-pressure electric boiler through water tank 6, and heat the water inside the high-temperature and high-pressure electric boiler through burner 7 to generate steam. The steam is transmitted to the underground column hole 19 through steam outlet 3 and pipeline, thereby improving the soil structure of the loess around the underground column hole 19. Step 5: Plant Green Plant 16 on the slope. Green Plant 16 is a plant with well-developed root system, strong resistance, drought resistance and barrenness tolerance, such as sea buckthorn and mulberry trees. It can adapt to the harsh environment in the early stage of the ecological restoration system and ensure the survival rate of vegetation on the loess slope. Step 6: Construct the first sand well 17 and ditch 18 at the bottom of the slope, bury the first water supply pipe 14 on the slope, install the first electric water suction device 13 at the top of the slope, and connect the output end of the first electric water suction device 13 to the port of the first water supply pipe 14. The first electric water suction device 13 is used to pump water from the first sand well 17 or ditch 18 until it is pumped into the capillary drip irrigation pipe 15. The diameter of the first sand well 17 is between 0.5m and 0.8m to ensure that the water is diverted when it flows through the first sand well 17 and to ensure that the water is stored evenly. Step 7: Lay capillary drip irrigation pipes 15 on the slope and connect them to the first water supply pipe 14. Use drip irrigation technology to irrigate the green plants 16. The capillary drip irrigation pipes 15 distributed through the first water supply pipe 14 irrigate the green plants 16 on the slope to ensure the survival rate of the green plants 16. The excess water from drip irrigation and irrigation can eventually flow back to the first sand well 17 and the ditch 18.

[0017] Example 3: This embodiment makes further technical improvements based on embodiment 1, as follows: See appendix Figure 1 As shown, it also includes a capillary drip irrigation pipe 15, which extends into the underground column borehole 19. By setting up an air input and circulating steam 22, it is used to collect the steam escaping from the underground column borehole 19, and condense it through an air condenser 20. The steam is then guided to the slope through another capillary drip irrigation pipe 15 at the end to irrigate the loess vegetation restoration plants 21, thereby saving resources.

[0018] This invention generates high temperature through a solar module and a high temperature module, and inputs it into the underground column hole 19 to improve the soil quality of the loess around the underground column hole 19, thereby increasing the strength of the structural loess. By planting 16 green plants and establishing a self-circulating ecological governance system structure that can realize water storage, water intake and drip irrigation, water resources can be fully recycled, reducing the erosion of loess slopes by flowing water, providing a stable growth environment and sufficient water resources for plants on loess slopes, and at the same time, the roots of the vegetation absorb water and release calcium, magnesium and other ions, which further strengthen the slopes. This will restore the impact of natural landscapes on the ecological environment of loess slopes, solve the hidden dangers of soil erosion caused by irregular seasonal rainfall in loess areas, and address the difficulty of reinforcing loess slopes by planting vegetation.

[0019] Example 4: See appendix Figure 7 As shown: The changes made in this embodiment based on Embodiment 1 are as follows: The solar module includes a solar power panel 23, and the high temperature module includes an air heating device 24. A condenser 25 is installed on the outside of the air heating device 24. A condensation tank 26 is also set on the top of the slope next to the air heating device 24. The condenser 25 and the condensation tank 26 are connected by a pipe so that the water condensed by the condenser 25 is introduced into the condensation tank 26. A second electric water suction device 29 is installed at the top of the slope. The input end of the second electric water suction device 29 is connected to a second water supply pipe 30. A second sand well 27 is set at the bottom of the slope. Another condensate pit 26 is set next to the second sand well 27 to collect rainwater. The end of the second water supply pipe 30 away from the second sand well 27 extends into the two condensate pits 26. Multiple drippers 31 are set on the outside of the second water supply pipe 30 to achieve precise drip irrigation of the vegetation on the loess slope. Multiple embankments 28 are set on the slope surface.

[0020] Example 5: See appendix Figure 7 As shown: A method for integrating a solar-powered electric boiler, high-temperature and high-pressure steam, and loess pore circulation to drain surrounding loess, as explained in Example 4, includes the following steps: A1: Choose a suitable location to install solar panels 23, ensuring sufficient sunlight; A2: Install an air heating device 24 near the loess slope and connect the solar power panel 23 to the energy storage device or directly to the air heating device 24 to ensure that it can receive the power provided by the solar power panel 23. A3: Install a condenser 25 near the air heating equipment to collect moisture from the air; A4: Excavate a second sand well 27 at the bottom of the loess slope to below the groundwater level to ensure that the second sand well 27 can collect groundwater, and build a condensate pit 26 to collect rainwater and condensate. A5: Lay drip irrigation tape or install drippers on loess slopes 31.

[0021] Solar panels 23 collect solar energy and convert it into electricity, which drives an air heating device 24 to heat the air to a high temperature, creating a hot air circulation system for draining the loess slope. A condenser 25 is installed to collect moisture from the air. Simultaneously, a low-temperature recirculation air condenser is used to collect moisture from the air, forming condensate, which is collected in a condensation pit 26. A second sand well 27 is installed at the bottom of the loess slope to collect the condensate in the condensation pit 26. The condensate from the low-temperature recirculation air and rainwater collected by the surrounding slope 6 are also collected in the second sand well 27 and then in the condensation pit 26. A second electric water suction device 29 extracts water from the underground condensation pit 26 in the sand well 5 and delivers it directly to the roots of the vegetation on the loess slope using drip irrigation technology via the second electric water suction device 29, the second water pipe 30, and drippers 31.

[0022] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A device integrating a solar-powered electric boiler, high-temperature and high-pressure steam, and a loess pore circulation system for draining surrounding loess, characterized in that: Set on the slope surface: Greening modules are used for surface protection and reinforcement of slopes; Set at the top of the slope: High-temperature module, used to generate high temperatures; The solar module is used to generate and store electrical energy to power the high-temperature module and the greening module.

2. The apparatus according to claim 1, characterized in that: The high-temperature module includes a high-temperature and high-pressure electric boiler, which is equipped with a pressure controller (1). A steam outlet (3) is also provided on the outside of the high-temperature and high-pressure electric boiler. Multiple underground column holes (19) are provided in the top of the slope. The steam outlet (3) transports steam to the underground column holes (19) through a pipeline. An electrical control box (2) and a water level controller (5) are also provided on the outside of the high-temperature and high-pressure electric boiler. A burner (7) is provided inside the pressure controller (1) and near the bottom. It also includes an oil tank (4) and a water tank (6), wherein the oil tank (4) is connected to the burner (7) via a pipe, and the water tank (6) is connected to the interior of the high-temperature and high-pressure electric boiler via a pipe.

3. The apparatus according to claim 2, characterized in that: The solar module includes multiple components (8) that make up a solar panel, and lenses (9) are laid on the outer surface of the multiple components (8). A dual-axis tracker (10) is also provided on one of the components (8). It also includes a battery (11) and a grid-connected inverter (12), the battery (11) being used to store electrical energy and the grid-connected inverter (12) being electrically connected to the high-temperature module.

4. The apparatus according to claim 3, characterized in that: The greening module includes a first electric water suction device (13), which is installed at the top of the slope. The first electric water suction device (13) is electrically connected to the grid-connected inverter (12). The output end of the first electric water suction device (13) is connected to a first water delivery pipe (14), which extends to the slope and the top of the slope. Multiple capillary drip irrigation pipes (15) are connected to the outside of the first water delivery pipe (14). It also includes greenery (16) planted on the slope and the top of the slope, and a first sand well (17) and a ditch (18) set at the bottom of the slope, wherein the end of the first water pipe (14) away from the first electric water suction device (13) extends into the first sand well (17) or the ditch (18).

5. A method for integrating a solar-powered electric boiler, high-temperature and high-pressure steam, and loess pore circulation to drain surrounding loess, characterized in that: The method employs the apparatus as described in any one of claims 1-4, and the method includes the following steps: S1: Leveling the slope surface and top; S2: Install a solar module on the top of the slope and connect it to the high-temperature module and the first electric water suction device (13) via a grid-connected inverter (12); S3: Dig underground column holes (19) below the high-temperature module. S4: Install a high-temperature module at the top of the slope, and guide the discharged steam into the underground column borehole (19); S5: Plant greenery on the slope (16). S6: Construct the first sand well (17) and ditch (18) at the bottom of the slope, bury the first water supply pipe (14) on the slope, install the first electric water suction device (13) at the top of the slope, and connect the output end of the first electric water suction device (13) to the port of the first water supply pipe (14). S7: Lay capillary drip irrigation pipes (15) on the slope and connect them to the first water supply pipe (14) to irrigate the green plants (16) using drip irrigation technology.

6. The method according to claim 5, characterized in that: The diameter of the underground column hole (19) is 16cm, the depth is equal to the slope height, and the interval between any two adjacent underground column holes (19) is 2m.

7. The method according to claim 5, characterized in that: The diameter of the first sand well (17) is between 0.5m and 0.8m.

8. The method according to claim 5, characterized in that: The green plants (16) are plants with well-developed root systems, drought resistance, and tolerance to poor soil.

9. The apparatus according to claim 1, characterized in that: The solar module includes a solar power panel (23), the high temperature module includes an air heating device (24), a condenser (25) is installed on the outside of the air heating device (24), a condensate tank (26) is also set at the top of the slope and next to the air heating device (24), and the condenser (25) and the condensate tank (26) are connected by a pipe so that the water condensed by the condenser (25) is introduced into the condensate tank (26); A second electric water suction device (29) is installed at the top of the slope. The input end of the second electric water suction device (29) is connected to a second water supply pipe (30). A second sand well (27) is set at the bottom of the slope. Another condensate pit (26) is set next to the second sand well (27) to collect rainwater. The end of the second water supply pipe (30) away from the second sand well (27) extends into the two condensate pits (26). Multiple drippers (31) are set on the outside of the second water supply pipe (30). Multiple embankments (28) are set on the slope surface.

10. A method for integrating a solar-powered electric boiler, high-temperature and high-pressure steam, and loess pore circulation to drain surrounding loess, characterized in that: The method employs the apparatus as described in claim 9, and the method includes the following steps: A1: Choose a suitable location to install solar panels (23) to ensure sufficient sunlight; A2: Install an air heating device (24) near the loess slope and connect the solar power panel (23) to the energy storage device or directly to the air heating device (24) to ensure that it can receive the power provided by the solar power panel (23); A3: Install a condenser (25) near the air heating equipment to collect moisture from the air; A4: Excavate a second sand well (27) at the bottom of the loess slope to below the groundwater level to ensure that the second sand well (27) can collect groundwater, and build a condensate cellar (26) to collect rainwater and condensate. A5: Lay drip irrigation tape or install drippers on loess slopes (31).

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