Irrigation-free ecological planting method for photovoltaic power station in arid region

Abstract

The invention relates to an irrigation-free ecological planting method for a photovoltaic power station in an arid region. A flow guiding device involved in the method is composed of a south side flow guiding slope, a north side flow guiding slope, a flow guiding film, a photovoltaic panel south side planting area, a photovoltaic panel north side planting area, a south side photovoltaic panel, a north side photovoltaic panel and an east-west direction projection line formed by projecting sunlight to the ground along the southermost side edge of the south side photovoltaic panel at the highest projection angle of the sun at noon in May 1st. The sunlight is projected to the ground along the edge of the north side of the photovoltaic panel in the east-west direction at the highest projection angle of the sun in the noon of May 1, and the flow guide film is laid on the flow guide slope. Limited water resource rainfall and photovoltaic panel cleaning water in an arid area are drained to an area, most suitable for ecological planting, around a photovoltaic panel, and xerophytes such as haloxylon ammodendron are planted in the area most suitable for ecological planting.

Description

Technical Field

[0001] This invention relates to the field of ecological construction of photovoltaic power stations in arid and semi-arid regions, specifically to a method for irrigation-free ecological planting in photovoltaic power stations in arid areas, which utilizes water from photovoltaic panel cleaning and rainfall to establish ecological vegetation. Background Technology

[0002] With the increasing scale of photovoltaic power station construction in desert, Gobi, and arid regions, the ecological construction of these power stations has attracted growing attention. However, a key aspect of ecological construction is ensuring water resources. These desert and Gobi areas often lack water sources and irrigation, with only natural rainfall and water from cleaning the photovoltaic panels available. In southern Xinjiang, the average annual rainfall is only a few tens of millimeters, and the amount of water used for cleaning the panels is also limited. Rainfall and water from cleaning the panels flow down, forming strips of moist soil in front of and between the panels. However, in the moist soil area in front of the panels, due to continuous sunlight, evaporation is intense, and plants cannot utilize the water before it evaporates. In the strips of moist soil between the panels, plants cannot grow because there is no direct sunlight throughout the day. Through observation and analysis of air temperature, soil temperature, evaporation, and light intensity in the areas under and between the photovoltaic panels, an optimal ecological planting area was found under the panels. This area receives sunlight for part of the day and shade from the photovoltaic panels for part of the day, thus significantly reducing evaporation and providing favorable conditions for ecological planting. By installing diversion devices under photovoltaic panels, rainwater and photovoltaic panel cleaning water can be diverted to the most suitable ecological planting area, achieving irrigation-free ecological planting under photovoltaic panels. Summary of the Invention

[0003] The purpose of this invention is to propose a method for irrigation-free ecological planting in photovoltaic power stations in arid areas. The method involves a diversion device consisting of a south diversion slope, a north diversion slope, a diversion membrane, a planting area on the south side of the photovoltaic panel, a planting area on the north side of the photovoltaic panel, a south photovoltaic panel, an east-west projection line of sunlight at the highest solar angle on May 1st along the southernmost edge of the south photovoltaic panel, a north photovoltaic panel, and an east-west projection line of sunlight at the highest solar angle on May 1st along the northernmost edge of the north photovoltaic panel. The diversion membrane is laid on the diversion slope. By setting up the diversion device under the photovoltaic panel, the limited water resources of the arid area, such as rainfall and photovoltaic panel cleaning water, are diverted to the most suitable area for ecological planting around the photovoltaic panel. In the most suitable area for ecological planting, drought-resistant plants such as Haloxylon ammodendron are planted.

[0004] The present invention describes a method for irrigation-free ecological planting in a photovoltaic power station in arid areas. The method involves a diversion device consisting of a south diversion slope (1a), a north diversion slope (1b), a diversion membrane (2a), a diversion membrane (2b), a planting area on the south side of the photovoltaic panel (3), a planting area on the north side of the photovoltaic panel (4), a south photovoltaic panel (5), an east-west projection line (6) of sunlight projected onto the ground along the southernmost edge of the south photovoltaic panel at noon on May 1st when the sun is at its highest projection angle, and a north photovoltaic panel (7), an east-west projection line (8) of sunlight projected onto the ground along the northernmost edge of the north photovoltaic panel at noon on May 1st when the sun is at its highest projection angle. The specific operation is carried out according to the following steps: a. Determine the location of the planting area (3) on the south side of the photovoltaic panel and the planting area (4) on the north side of the photovoltaic panel. The southern boundary of the planting area (3) on the south side of the photovoltaic panel is located on the east-west projection line (6) of the sunlight along the southernmost edge of the photovoltaic panel when the sun is at its highest projection angle at noon on May 1. The northern boundary is 50cm north of the east-west projection line (6) of the sunlight along the southernmost edge of the photovoltaic panel when the sun is at its highest projection angle at noon on May 1. The southern boundary of the planting area (4) on the north side of the photovoltaic panel is located on the east-west projection line (8) of the sunlight along the northernmost edge of the photovoltaic panel when the sun is at its highest projection angle at noon on May 1. The northern boundary is 50cm north of the east-west projection line (8) of the sunlight along the northernmost edge of the photovoltaic panel when the sun is at its highest projection angle at noon on May 1. The horizontal slope of the south diversion slope (1a) and the north diversion slope (1b) is 5%, with the south slope higher than the north slope. b. Construct a south-side guide slope (1a) and a north-side guide slope (1b) with soil under the south-side photovoltaic panel (5) and the north-side photovoltaic panel (7). The top of the south-side guide slope (1a) is located 100cm south of the south-side photovoltaic panel (5), and the bottom of the slope is located on the projection line (6) of sunlight projected onto the ground along the southernmost edge of the south-side photovoltaic panel when the sun is at its highest projection angle at noon on May 1. The top of the north-side guide slope (1b) is located 100cm south of the north-side photovoltaic panel (7), and the bottom of the slope is located on the projection line (8) of sunlight projected onto the ground along the northernmost edge of the north-side photovoltaic panel when the sun is at its highest projection angle at noon on May 1. c. The flow guiding membrane (2a) is laid on the south flow guiding slope (1a), and the flow guiding membrane (2b) is laid on the north flow guiding slope (1b); d. Plant ecological plants in the planting area (3) on the south side of the photovoltaic panel and the planting area (4) on the north side of the photovoltaic panel. In mid-April, use agricultural machinery to plow and level the soil in the planting area (3) on the south side of the photovoltaic panel and the planting area (4) on the north side of the photovoltaic panel. Then, plant a row of Haloxylon ammodendron in each of the two areas with a plant spacing of 1.5 meters. Use healthy Haloxylon ammodendron seedlings that are 1 year old. Sow the seeds of drought-resistant plants such as camel thorn, ephedra, salt grass and bloodwort between the planted Haloxylon ammodendron plants. Sow the seeds by mixing them with sand and then sowing them on the ground. The seed quantity is 3 grams of seeds per meter along the 50cm wide strip planting area. After sowing, lightly rake to bury the seeds shallowly.

[0005] Compared with existing technologies, the present invention provides a method for establishing ecological planting under photovoltaic panels without irrigation, which has the following beneficial effects.

[0006] 1. By using a diversion slope, the limited rainwater and photovoltaic panel cleaning water in the arid area are introduced into the most suitable ecological planting area around the photovoltaic panels, realizing the establishment of vegetation in the arid area without irrigation; 2. By planting drought-tolerant, deep-rooted plants such as Haloxylon ammodendron, new shading and wind-sheltered conditions are created, providing conditions for the growth of other drought-tolerant plants. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the flow guiding device of the present invention; Figure 2 This is a schematic diagram of the drainage device for ecological planting under photovoltaic panels proposed in this invention, at the installation position under the photovoltaic panel. In the diagram: 1. South diversion slope (1a), 2. North diversion slope (1b), 3. Diversion membrane (2a), 4. Planting area on the south side of the photovoltaic panel; 5. South photovoltaic panel; 6. The projection line of sunlight along the southernmost edge of the south photovoltaic panel onto the ground at the highest solar angle at noon on May 1; 7. North photovoltaic panel; 8. The projection line of sunlight along the southernmost edge of the north photovoltaic panel onto the ground at the highest solar angle at noon on May 1. Detailed Implementation

[0008] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0009] In the description of the invention, it should be understood that the terms up, down, front, back, east, west, south, and north indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of the invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention. Example

[0010] This invention discloses a method for achieving irrigation-free ecological planting in a photovoltaic power station in arid areas. The method involves a diversion device composed of a south diversion slope 1a, a north diversion slope 1b, a diversion membrane 2a, a diversion membrane 2b, a planting area 3 on the south side of the photovoltaic panel, a planting area 4 on the north side of the photovoltaic panel, a south photovoltaic panel 5, an east-west projection line 6 of sunlight falling on the ground along the southernmost edge of the south photovoltaic panel at noon on May 1st when the sun is at its highest projection angle, a north photovoltaic panel 7, and an east-west projection line 8 of sunlight falling on the ground along the northernmost edge of the north photovoltaic panel at noon on May 1st when the sun is at its highest projection angle. The specific operation is carried out according to the following steps: a. To divert rainwater and photovoltaic panel cleaning water to the most suitable ecological planting area, the locations of planting area 3 on the south side of the photovoltaic panel and planting area 4 on the north side of the photovoltaic panel are determined. The southern boundary of planting area 3 on the south side of the photovoltaic panel is located on the east-west projection line 6 of sunlight projected onto the ground along the southernmost edge of the southern photovoltaic panel at the highest solar angle at noon on May 1st. The northern boundary is located 50cm north of the east-west projection line 6 of sunlight projected onto the ground along the southernmost edge of the southern photovoltaic panel at the highest solar angle at noon on May 1st. The southern boundary of planting area 4 on the north side of the photovoltaic panel is located on the east-west projection line 8 of sunlight projected onto the ground along the northernmost edge of the northern photovoltaic panel at the highest solar angle at noon on May 1st. The northern boundary is located 50cm north of the east-west projection line 8 of sunlight projected onto the ground along the northernmost edge of the northern photovoltaic panel at the highest solar angle at noon on May 1st. b. In order to divert rainwater and photovoltaic panel cleaning water to the most suitable ecological planting area, diversion slopes 1a and 1b are constructed with soil under the south photovoltaic panel 5 and the north photovoltaic panel 7. The top of the south diversion slope 1a is located 100cm south of the south photovoltaic panel 5, and the bottom of the slope is located on the projection line 6 of the sunlight along the southernmost edge of the south photovoltaic panel to the ground when the sun is at its highest angle at noon on May 1. The top of the north diversion slope 1b is located 100cm south of the north photovoltaic panel 7, and the bottom of the slope is located on the projection line 8 of the sunlight along the northernmost edge of the north photovoltaic panel to the ground when the sun is at its highest angle at noon on May 1. The horizontal slope of both the south diversion slope 1a and the north diversion slope 1b is 5%, with the south slope being higher than the north slope. c. The flow guiding membrane 2a is laid on the south flow guiding slope 1a, and the flow guiding membrane 2b is laid on the north flow guiding slope 1b. d. Plant ecological plants in planting area 3 on the south side of the photovoltaic panel and planting area 4 on the north side of the photovoltaic panel. In mid-April, use agricultural machinery to plow and level the soil in planting area 3 on the south side of the photovoltaic panel and planting area 4 on the north side of the photovoltaic panel. Then, plant a row of Haloxylon ammodendron in each of the two areas with a plant spacing of 1.5 meters. Use healthy one-year-old Haloxylon ammodendron seedlings. Sow the seeds of drought-resistant plants such as camel thorn, ephedra, salt grass and bloodwort between the planted Haloxylon ammodendron plants. Mix the seeds with sand and scatter them on the ground. The seed quantity is 3 grams of seeds per meter along the 50cm wide strip planting area. After sowing, lightly rake to bury the seeds shallowly. Reference Figure 1 , which are the south guide slope 1a and the north guide slope 1b, and the guide membrane 2a and guide membrane 2b in the guide device; refer to Figure 2 The flow guiding membrane 2a is laid on the south flow guiding slope 1a, and the flow guiding membrane 2b is laid on the north flow guiding slope 1b. The southern boundary of the planting area 3 on the south side of the photovoltaic panel is located at the east-west projection line 6 where sunlight is projected onto the ground along the southernmost edge of the southern photovoltaic panel 5 at noon on May 1st when the sun is at its highest projection angle. The northern boundary is located 50cm north of the east-west projection line 6 where sunlight is projected onto the ground along the southernmost edge of the southern photovoltaic panel at noon on May 1st. The measured east-west projection line 6 where sunlight is projected onto the ground along the southernmost edge of the southern photovoltaic panel at noon on May 1st is located 78cm north of the vertical line of the southernmost edge of the southern photovoltaic panel 5. The area within 50cm north of the east-west projection line 6 on the ground is the southern planting area 3; the southern boundary of the northern planting area 4 of the photovoltaic panel is located at the east-west projection line 8 on the ground where the sunlight is projected along the northernmost edge of the northern photovoltaic panel at the highest solar projection angle at noon on May 1, and the northern boundary is 50cm north of the east-west projection line 8 on the ground where the sunlight is projected along the northernmost edge of the northern photovoltaic panel at the highest solar projection angle at noon on May 1. The measured east-west projection line 8 on the ground where the sunlight is projected along the northernmost edge of the northern photovoltaic panel at the highest solar projection angle at noon on May 1 is located 147cm north of the vertical line of the northernmost edge of the northern photovoltaic panel 7; To divert rainwater and photovoltaic panel cleaning water to the most suitable ecological planting area, a south-side diversion slope 1a and a north-side diversion slope 1b were constructed under the photovoltaic panels. The top of the south-side diversion slope 1a is located 100cm south of the south photovoltaic panel 5, and the bottom of the slope is located on the projection line 6 of the noon sunlight on May 1st, which is projected onto the ground along the southernmost edge of the south photovoltaic panel. The top of the north-side diversion slope 1b is located 100cm south of the north photovoltaic panel 7, and the bottom of the slope is located on the projection line 8 of the noon sunlight on May 1st, which is projected onto the ground along the northernmost edge of the north photovoltaic panel. The south-side diversion slope 1a and the north-side diversion slope 1b are micro-topography constructed using locally sourced soil. The horizontal slopes of the south diversion slope 1a and the north diversion slope 1b are 5%, with the south slope being higher than the north slope. The diversion membrane 2a is laid on the south diversion slope 1a, and the diversion membrane 2b is laid on the north diversion slope 1b. To prevent the diversion membrane 2a and the diversion membrane 2b from being blown away by strong winds, the south and north sides of the diversion membrane 2a and the diversion membrane 2b are compacted with soil. On April 20, the soil in planting area 3 on the south side and planting area 4 on the north side was plowed and leveled. A row of Haloxylon ammodendron was planted in each of the two areas, using healthy one-year-old Haloxylon ammodendron seedlings with a plant spacing of 1.5 meters. Seeds of drought-resistant plants such as camel thorn, ephedra, saltwort, and bloodwort were sown between the Haloxylon ammodendron plants at a rate of 3 grams per meter. The seeds were mixed with moist sand and sown on the topsoil, and then lightly raked to bury the seeds shallowly. The photovoltaic panels are cleaned every ten days. Each cleaning truck carries 10 tons of water and cleans 30 acres of photovoltaic area. The rainfall from April to October is 60 mm. On October 1, the actual measurement showed that the survival rate of 1-year-old Haloxylon ammodendron seedlings planted in planting area 3 on the south side of the photovoltaic panels was 82.3%, and the survival rate of 1-year-old Haloxylon ammodendron seedlings planted in planting area 4 on the north side of the photovoltaic panels was 86.8%.

Claims

1. A method for irrigation-free ecological planting at a photovoltaic power station in arid areas, characterized in that, The method involves a flow guiding device consisting of a south flow guiding slope (1a), a north flow guiding slope (1b), a flow guiding membrane (2a), a flow guiding membrane (2b), a planting area on the south side of the photovoltaic panel (3), a planting area on the north side of the photovoltaic panel (4), a south photovoltaic panel (5), an east-west projection line of sunlight projected onto the ground along the southernmost edge of the south photovoltaic panel at noon on May 1st (6), a north photovoltaic panel (7), and an east-west projection line of sunlight projected onto the ground along the northernmost edge of the north photovoltaic panel at noon on May 1st (8). The specific operation is carried out according to the following steps: a. Determine the location of the planting area (3) on the south side of the photovoltaic panel and the planting area (4) on the north side of the photovoltaic panel. The southern boundary of the planting area (3) on the south side of the photovoltaic panel is located on the east-west projection line (6) of the sunlight along the southernmost edge of the photovoltaic panel when the sun is at its highest projection angle at noon on May 1. The northern boundary is 50cm north of the east-west projection line (6) of the sunlight along the southernmost edge of the photovoltaic panel when the sun is at its highest projection angle at noon on May 1. The southern boundary of the planting area (4) on the north side of the photovoltaic panel is located on the east-west projection line (8) of the sunlight along the northernmost edge of the photovoltaic panel when the sun is at its highest projection angle at noon on May 1. The northern boundary is 50cm north of the east-west projection line (8) of the sunlight along the northernmost edge of the photovoltaic panel when the sun is at its highest projection angle at noon on May 1. The horizontal slope of the south diversion slope (1a) and the north diversion slope (1b) is 5%, with the south slope higher than the north slope. b. Construct a south-side guide slope (1a) and a north-side guide slope (1b) with soil under the south-side photovoltaic panel (5) and the north-side photovoltaic panel (7). The top of the south-side guide slope (1a) is located 100cm south of the south-side photovoltaic panel (5), and the bottom of the slope is located on the projection line (6) of sunlight projected onto the ground along the southernmost edge of the south-side photovoltaic panel when the sun is at its highest projection angle at noon on May 1. The top of the north-side guide slope (1b) is located 100cm south of the north-side photovoltaic panel (7), and the bottom of the slope is located on the projection line (8) of sunlight projected onto the ground along the northernmost edge of the north-side photovoltaic panel when the sun is at its highest projection angle at noon on May 1. c. The flow guiding membrane (2a) is laid on the south flow guiding slope (1a), and the flow guiding membrane (2b) is laid on the north flow guiding slope (1b); d. Plant ecological plants in the planting area (3) on the south side of the photovoltaic panel and the planting area (4) on the north side of the photovoltaic panel. In mid-April, use agricultural machinery to plow and level the soil in the planting area (3) on the south side of the photovoltaic panel and the planting area (4) on the north side of the photovoltaic panel. Then, plant a row of Haloxylon ammodendron in each of the two areas with a plant spacing of 1.5 meters. Use healthy Haloxylon ammodendron seedlings that are 1 year old. Sow the seeds of drought-resistant plants such as camel thorn, ephedra, salt grass and bloodwort between the planted Haloxylon ammodendron plants. Sow the seeds by mixing them with sand and then sowing them on the ground. The seed quantity is 3 grams of seeds per meter along the 50cm wide strip planting area. After sowing, lightly rake to bury the seeds shallowly.

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