Water and soil conservation system and method for ecological restoration of pumped storage power station in desert area

Abstract

The invention discloses a water and soil conservation system for ecological restoration of a pumped storage power station in a desert area, which comprises a reservoir basin and a dam body around the reservoir basin, surface soil is laid on the back surface of the dam body, photovoltaic equipment is laid on the back surface of the dam body along a slope body, and vegetation is planted in and below a spacing area of the photovoltaic equipment. A rainwater collecting and draining system capable of collecting and storing rainwater and conducting irrigation is arranged on the back face of the dam body. Meanwhile, the invention further discloses a water and soil conservation method for ecological restoration of the pumped storage power station in the desert area. The functions of photovoltaic rainwater collection and solar radiation reduction are utilized, and the forest grass vegetation recovery rate can be achieved as early as possible; the photovoltaic wind barrier and sand barrier functions are utilized, the effective sand prevention effect is achieved before and after vegetation restoration, sand grain storage caused by sand storm and sand storm flow is reduced, and the sediment content in a reservoir is reduced.

Description

Technical Field

[0001] The invention relates to a soil and water conservation system and method for ecological restoration of a pumped-storage power station in a desert area, belonging to the technical field of construction of pumped-storage power stations. Background Art

[0002] my country's northwest region is rich in wind and solar resources. In recent years, large new energy bases have been built one after another, which require the configuration of corresponding energy storage systems. Pumped-storage power stations have been widely used because of their mature technology and large storage capacity.

[0004] Therefore, we proposed a soil and water conservation system and method for ecological restoration of pumped storage power stations in desert areas. Summary of the invention

[0005] The purpose of the present invention is to provide a soil and water conservation system for ecological restoration of pumped storage power stations in desert areas, and also to provide a soil and water conservation method for ecological restoration of pumped storage power stations in desert areas. The present invention is conducive to realizing the forest and grass vegetation recovery rate as soon as possible, and reduces the sand entering the reservoir caused by sandstorms and wind and sand flows, and reduces the sediment content in the reservoir.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a soil and water conservation system for ecological restoration of pumped-storage power stations in desert areas, comprising a reservoir basin and a dam body around the reservoir basin, the back surface of the dam body being paved with surface soil, and photovoltaic equipment being paved along the slope on the back of the dam body, a plurality of the photovoltaic equipment being arranged in rows across the slope of the dam body, and a plurality of rows of the photovoltaic equipment being arranged from top to bottom on the slope surface of the dam body, vegetation being planted in and below the interval areas between the photovoltaic equipment, a rainwater collection and drainage system being arranged on the back of the dam body for collecting and storing rainwater for irrigation, and a water replenishment system being also included, the water replenishment system being connected to the rainwater collection and drainage system, and the water replenishment system being able to transport water in the reservoir basin to the rainwater collection and drainage system for irrigation.

[0007] In the aforementioned soil and water conservation system for ecological restoration of a pumped-storage power station in a desert area, the photovoltaic device includes a base, the base is fixed on the surface of the dam body, a bracket is arranged on the top of the base, and a photovoltaic panel is arranged on the surface of the bracket.

[0008] The aforementioned soil and water conservation system for ecological restoration of a pumped-storage power station in a desert area, the bracket includes a column with an adjustable length and a fixed beam, the bottom end of the column is embedded and fixed on the top of the base, the top end of the column is hingedly arranged at the bottom center of the fixed beam, the photovoltaic panel is installed on the top of the fixed beam, and one end of a side support is respectively arranged at both ends of the fixed beam, and the other ends of the two side supports are fixed to the two sides of the base.

[0009] The aforementioned soil and water conservation system for ecological restoration of a pumped-storage power station in a desert area, the rainwater collection and drainage system includes a water collection trough, the water collection trough is arranged transversely to the slope of the dam body, each of the water collection troughs is placed below the lower edge of the corresponding photovoltaic panel, and a connecting hose is arranged at the bottom of the side wall of the water collection trough on the side close to the bottom of the dam body slope, and multiple hoses are arranged longitudinally along the slope direction of the dam body, and the side walls of the hoses are evenly distributed with through holes.

[0010] The aforementioned soil and water conservation system for ecological restoration of a pumped-storage power station in a desert area, wherein the water collection trough is U-shaped, the water collection trough is arranged within 80 cm of the lower edge of the corresponding photovoltaic panel, and the top width of the water collection trough is 30 cm-50 cm.

[0011] The aforementioned soil and water conservation system for ecological restoration of a pumped-storage power station in a desert area, wherein the water collection trough is funnel-shaped with an opening at the top, the water collection trough is arranged within 80 cm of the lower edge of the corresponding photovoltaic panel, and the width of the top opening of the water collection trough is 30 cm-50 cm.

[0012] The aforementioned soil and water conservation system for ecological restoration of a pumped-storage power station in a desert area, the water replenishment system includes a water pump, the water pump is placed at the bottom of the reservoir basin, the output end of the water pump is provided with one end of a water supply pipe, the other end of the water supply pipe is connected to a plurality of water supply branches, and the plurality of water supply branches are respectively connected to the water collecting tank.

[0013] A soil and water conservation method for ecological restoration of a pumped storage power station in a desert area, characterized by comprising the following steps:

[0014] S1. Before excavation of the reservoir, the surface soil within the construction site shall be stripped and piled up in the storage yard for preservation;

[0015] S2. Construction of the reservoir basin and the dam around the reservoir;

[0016] S3. Build photovoltaic equipment in the area behind the dam around the reservoir;

[0017] S4. Re-lay the collected surface soil and build a rainwater collection and drainage system;

[0018] S5. Vegetation restoration: refer to the original vegetation species on the site, sow grass seeds under the photovoltaic panels, plant container seedlings and grass seeds between the photovoltaic panels, and carry out artificial tending regularly;

[0019] S6. After the vegetation grows, the photovoltaic supports can be gradually removed in batches depending on the vegetation recovery situation to further expand the vegetation range.

[0020] In the aforementioned method for soil and water conservation for ecological restoration of a pumped-storage power station in a desert area, the stripping thickness of the surface soil in step S1 is not less than 20 cm.

[0021] In the aforementioned method for soil and water conservation for ecological restoration of a pumped-storage power station in a desert area, in step S4, organic fertilizer, water-retaining agent and soil conditioner are added to the returned surface soil.

[0022] Compared with the existing technology, the present invention utilizes the functions of photovoltaic rain collection and reduction of solar radiation, which is conducive to achieving the forest and grass vegetation recovery rate as soon as possible; the wind barrier and sand barrier function of photovoltaic is utilized to play an effective sand prevention effect before and after vegetation recovery, reduce the sand entering the reservoir caused by sandstorms and wind and sand flow, and reduce the sediment content in the reservoir; photovoltaic power generation can be synchronously connected to the power grid, forming a water-photovoltaic complementary power generation system with the pumped storage power station, which can improve energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0024] Figure 2 is a plan layout diagram of the present invention;

[0025] Figure 3 is a elevational layout diagram of a photovoltaic device of the present invention;

[0026] Figure 4 It is a side schematic diagram of the photovoltaic device structure of the present invention.

[0027] Figure numerals: 1-reservoir basin, 2-dam body, 3-photovoltaic equipment, 4-vegetation, 5-rainwater collection and drainage system, 6-base, 7-bracket, 8-photovoltaic panel, 9-fixed beam, 10-side support, 11-water collection tank, 12-hose, 13-water replenishment system, 14-water pump, 15-water supply main pipe, 16-water supply branch, 17-column, 18-surface soil.

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0029] Embodiment 1 of the present invention: A soil and water conservation system for ecological restoration of pumped-storage power stations in desert areas, comprising a reservoir basin 1 and a dam body 2 around the reservoir basin 1, the back surface of the dam body 2 being paved with surface soil 18, and photovoltaic equipment 3 being paved along the slope on the back of the dam body 2, a plurality of photovoltaic equipment 3 being arranged in rows across the slope of the dam body 2, and a plurality of rows of photovoltaic equipment 3 being arranged from top to bottom on the slope surface of the dam body 2, vegetation 4 being planted in and below the interval areas of the photovoltaic equipment 3, a rainwater collection and drainage system 5 for collecting and storing rainwater for irrigation being arranged on the back of the dam body 2, and a water replenishment system 13 being also included, the water replenishment system 13 being connected to the rainwater collection and drainage system 5, the water replenishment system 13 being able to transport water in the reservoir basin 1 to the rainwater collection and drainage system 5 for irrigation.

[0030] The ecological functions of photovoltaics for sand prevention and control are mainly manifested in: first, the function of converting solar radiation, regulating the thermal balance of deserts and Gobi, and weakening the driving force of the occurrence and development of sandstorms and wind-blown sand flows, namely the function of strong winds; second, the function of wind barriers and sand barriers; third, the function of collecting rainwater to promote plant growth.

[0031] Embodiment 2 of the present invention: A soil and water conservation system for ecological restoration of pumped-storage power stations in desert areas, comprising a reservoir basin 1 and a dam body 2 surrounding the reservoir basin 1, the back surface of the dam body 2 being paved with surface soil 18, and photovoltaic devices 3 being paved along the slope on the back of the dam body 2, a plurality of photovoltaic devices 3 being arranged in rows across the slope of the dam body 2, and a plurality of rows of photovoltaic devices 3 being arranged from top to bottom on the slope surface of the dam body 2, vegetation 4 being planted in and below the intervals between the photovoltaic devices 3, a rainwater collection and drainage system 5 for collecting and storing rainwater for irrigation being arranged on the back of the dam body 2, and a water replenishment system 13 being also included, the water replenishment system 13 being connected to the rainwater collection and drainage system 5, the water replenishment system 13 being able to transport water in the reservoir basin 1 to the rainwater collection and drainage system 5 for irrigation.

[0032] The photovoltaic device 3 includes a base 6, which is fixed on the surface of the dam body 2. A bracket 7 is arranged on the top of the base 6, and a photovoltaic panel 8 is arranged on the surface of the bracket 7; wherein the bracket 7 includes a column 17 with adjustable length and a fixed beam 9, the bottom end of the column 17 is embedded and fixed on the top of the base 6, the top end of the column 17 is hingedly arranged at the bottom center of the fixed beam 9, the photovoltaic panel 8 is installed on the top of the fixed beam 9, and one end of a side support 10 is respectively arranged at both ends of the fixed beam 9, and the other ends of the two side supports 10 are fixed to the two sides of the base 6.

[0033] Embodiment 3 of the present invention: A soil and water conservation system for ecological restoration of a pumped-storage power station in a desert area, comprising a reservoir basin 1 and a dam body 2 around the reservoir basin 1, the back surface of the dam body 2 being paved with surface soil 18, and photovoltaic devices 3 being paved along the slope on the back of the dam body 2, a plurality of photovoltaic devices 3 being arranged in rows across the slope of the dam body 2, and a plurality of rows of photovoltaic devices 3 being arranged from top to bottom on the slope surface of the dam body 2, vegetation 4 being planted in and below the intervals between the photovoltaic devices 3, a rainwater collection and drainage system 5 for collecting and storing rainwater for irrigation being arranged on the back of the dam body 2, and a water replenishment system 13 being also included, the water replenishment system 13 being connected to the rainwater collection and drainage system 5, the water replenishment system 13 being able to transport water in the reservoir basin 1 to the rainwater collection and drainage system 5 for irrigation.

[0034] The photovoltaic device 3 includes a base 6, which is fixed on the surface of the dam body 2. A bracket 7 is arranged on the top of the base 6, and a photovoltaic panel 8 is arranged on the surface of the bracket 7; wherein the bracket 7 includes a column 17 with adjustable length and a fixed beam 9, the bottom end of the column 17 is embedded and fixed on the top of the base 6, the top end of the column 17 is hingedly arranged at the bottom center of the fixed beam 9, the photovoltaic panel 8 is installed on the top of the fixed beam 9, and one end of a side support 10 is respectively arranged at both ends of the fixed beam 9, and the other ends of the two side supports 10 are fixed to the two sides of the base 6.

[0035] The rainwater collection and drainage system 5 includes a water collection tank 11, which is arranged transversely to the slope of the dam body 2. Each water collection tank 11 is placed below the lower edge of the corresponding photovoltaic panel 8. A connected hose 12 is arranged at the bottom of the side wall of the water collection tank 11 close to the bottom of the slope of the dam body 2. Multiple hoses 12 are arranged longitudinally along the slope direction of the dam body 2, and the side walls of the hoses 12 are evenly distributed with through holes. The photovoltaic panel 8 has an inclination angle of 35° to 45°. After rainwater falls on the photovoltaic panel 8, it will fall down to the water collection tank 11 along the inclined plate surface. The water in the water collection tank 11 is poured into the hose 12 connected thereto. The water in the hose 12 irrigates the vegetation through the surface through holes. Drip irrigation can be used to extend the water storage and irrigation time of the water collection tank 11. The water collection tank 11 is U-shaped, and the water collection tank 11 is arranged within 80cm of the lower edge of the corresponding photovoltaic panel 8. The top width of the water collection tank 11 is 30cm-50cm.

[0036] Embodiment 4 of the present invention: A soil and water conservation system for ecological restoration of a pumped-storage power station in a desert area, comprising a reservoir basin 1 and a dam body 2 surrounding the reservoir basin 1, the back surface of the dam body 2 being paved with surface soil 18, and photovoltaic devices 3 being paved along the slope on the back of the dam body 2, a plurality of photovoltaic devices 3 being arranged in rows across the slope of the dam body 2, and a plurality of rows of photovoltaic devices 3 being arranged from top to bottom on the slope surface of the dam body 2, vegetation 4 being planted in and below the intervals between the photovoltaic devices 3, a rainwater collection and drainage system 5 for collecting and storing rainwater for irrigation being arranged on the back of the dam body 2, and a water replenishment system 13 being also included, the water replenishment system 13 being connected to the rainwater collection and drainage system 5, the water replenishment system 13 being able to transport water in the reservoir basin 1 to the rainwater collection and drainage system 5 for irrigation.

[0037] The photovoltaic device 3 includes a base 6, which is fixed on the surface of the dam body 2. A bracket 7 is arranged on the top of the base 6, and a photovoltaic panel 8 is arranged on the surface of the bracket 7; wherein the bracket 7 includes a column 17 with adjustable length and a fixed beam 9, the bottom end of the column 17 is embedded and fixed on the top of the base 6, the top end of the column 17 is hingedly arranged at the bottom center of the fixed beam 9, the photovoltaic panel 8 is installed on the top of the fixed beam 9, and one end of a side support 10 is respectively arranged at both ends of the fixed beam 9, and the other ends of the two side supports 10 are fixed to the two sides of the base 6.

[0038] The rainwater collection and drainage system 5 includes a water collection trough 11, which is arranged transversely to the slope of the dam body 2. Each water collection trough 11 is placed below the lower edge of the corresponding photovoltaic panel 8. A connecting hose 12 is arranged at the bottom of the side wall of the water collection trough 11 close to the bottom of the slope of the dam body 2. Multiple hoses 12 are arranged longitudinally along the slope direction of the dam body 2, and the side walls of the hoses 12 are evenly distributed with through holes. The photovoltaic panel 8 has an inclination angle of 35° to 45°. After rainwater falls on the photovoltaic panel 8, it will fall down to the water collection trough 11 along the inclined plate surface. The water in the water collection trough 11 is poured into the hose 12 connected thereto. The water in the hose 12 irrigates the vegetation through the surface holes. Drip irrigation can be used to extend the water storage and irrigation time of the water collection trough 11. The water collecting trough 11 is in the shape of a funnel with an opening at the top. The water collecting trough 11 is arranged within 80 cm of the lower edge of the corresponding photovoltaic panel 8. The width of the top opening of the water collecting trough 11 is 30 cm-50 cm, which is convenient for collecting rainwater and can reduce the evaporation of the water stored in the water collecting trough 11.

[0039] Embodiment 5 of the present invention: A soil and water conservation system for ecological restoration of a pumped-storage power station in a desert area, comprising a reservoir basin 1 and a dam body 2 around the reservoir basin 1, the back surface of the dam body 2 being paved with surface soil 18, and photovoltaic devices 3 being paved along the slope on the back of the dam body 2, a plurality of photovoltaic devices 3 being arranged in rows across the slope of the dam body 2, and a plurality of rows of photovoltaic devices 3 being arranged from top to bottom on the slope surface of the dam body 2, vegetation 4 being planted in and below the intervals between the photovoltaic devices 3, a rainwater collection and drainage system 5 for collecting and storing rainwater for irrigation being arranged on the back of the dam body 2, and a water replenishment system 13 being also included, the water replenishment system 13 being connected to the rainwater collection and drainage system 5, the water replenishment system 13 being able to transport water in the reservoir basin 1 to the rainwater collection and drainage system 5 for irrigation.

[0040] The photovoltaic device 3 includes a base 6, which is fixed on the surface of the dam body 2. A bracket 7 is arranged on the top of the base 6, and a photovoltaic panel 8 is arranged on the surface of the bracket 7; wherein the bracket 7 includes a column 17 with adjustable length and a fixed beam 9, the bottom end of the column 17 is embedded and fixed on the top of the base 6, the top end of the column 17 is hingedly arranged at the bottom center of the fixed beam 9, the photovoltaic panel 8 is installed on the top of the fixed beam 9, and one end of a side support 10 is respectively arranged at both ends of the fixed beam 9, and the other ends of the two side supports 10 are fixed to the two sides of the base 6.

[0041] The rainwater collection and drainage system 5 includes a water collection trough 11, which is arranged transversely to the slope of the dam body 2. Each water collection trough 11 is placed below the lower edge of the corresponding photovoltaic panel 8. A connecting hose 12 is arranged at the bottom of the side wall of the water collection trough 11 close to the bottom of the slope of the dam body 2. Multiple hoses 12 are arranged longitudinally along the slope direction of the dam body 2, and the side walls of the hoses 12 are evenly distributed with through holes. The photovoltaic panel 8 has an inclination angle of 35° to 45°. After rainwater falls on the photovoltaic panel 8, it will fall downward along the inclined board surface into the water collection trough 11. The water in the water collection trough 11 is poured into the hose 12 connected thereto. The water in the hose 12 irrigates the vegetation through the surface holes. Drip irrigation can be used to extend the water storage and irrigation time of the water collection trough 11.

[0042] It also includes a water replenishment system 13, which includes a water pump 14. The water pump 14 is placed at the bottom of the reservoir basin 1. The output end of the water pump 14 is provided with one end of a water supply pipe 15. The other end of the water supply pipe 15 is connected to a plurality of water supply branches 16. The plurality of water supply branches 16 are respectively connected to the water collection tank 11. In order to ensure the survival of vegetation during drought periods when water resources are scarce, the water in the reservoir basin 1 can be used to irrigate the vegetation through the water replenishment system 13.

[0043] Embodiment 6 of the present invention: A soil and water conservation method for ecological restoration of a pumped storage power station in a desert area, characterized by comprising the following steps:

[0044] S1. Before excavation of the reservoir, the surface soil within the construction site shall be stripped and piled up in the storage yard for preservation;

[0045] S2. Construction of the reservoir basin and the dam around the reservoir;

[0046] S3. Build photovoltaic equipment in the area behind the dam around the reservoir;

[0047] S4. Re-lay the collected surface soil and build a rainwater collection and drainage system;

[0048] S5. Vegetation restoration: refer to the original vegetation species on the site, sow grass seeds under the photovoltaic panels, plant container seedlings and grass seeds between the photovoltaic panels, and carry out artificial tending regularly;

[0049] S6. After the vegetation grows, the photovoltaic supports can be gradually removed in batches depending on the vegetation recovery situation to further expand the vegetation range.

[0050] Specifically, the stripping thickness of the surface soil in step S1 is not less than 20 cm.

[0051] Specifically, in step S4, organic fertilizer, water retaining agent and soil conditioner are added to the surface soil to be re-laid.

[0052] The working principle of an embodiment of the present invention is as follows: during the construction of a reservoir, the surface soil 18 of the reservoir basin 1 when it is excavated is filled on the back surface of the dam body 2, and photovoltaic equipment 3 is laid on the slope on the back of the dam body 2, and vegetation 4 is planted on the back of the dam body 2, and a rainwater collection and drainage system 5 is used; the vegetation 4 is planted by sowing grass seeds and planting container seedlings. Considering that the precipitation in desert areas is relatively low, the sowing of grass seeds and planting container seedlings can be carried out preferentially between the photovoltaic panels 8, so as to make full use of the water collection function of photovoltaics for centralized supply; after survival, grass seeds can be sown under the photovoltaic panels 8. At this stage, in order to increase the moisture content of the soil under the coverage of the photovoltaic panels 8, a rainwater collection and drainage system 5 is arranged between the photovoltaic panels 8, and a water collection trough 11 is arranged near the lower edge of the photovoltaic panels 8. The water collection trough 11 is made of thin-walled metal parts, and bolts are arranged at the bottom at a certain interval to fix it on the ground, and a hose 12 is connected to achieve irrigation.

[0053] The ecological functions of photovoltaics for sand prevention and control are mainly manifested in: first, converting solar radiation, regulating the thermal balance of deserts and Gobi, weakening the driving force of the occurrence and development of sandstorms and wind-blown sand flows, namely the function of strong winds; second, the wind barrier function and sand barrier function; third, the function of collecting rainwater to promote plant growth.

[0054] Thermal balance to promote conversion: In desert areas, the vegetation canopy is sparse and the vegetation coverage is small (usually 5% to 15%), while the projection coverage of photovoltaic panels is much greater than that of desert vegetation. Therefore, the amount of solar radiation converted by photovoltaics is much greater than that of desert vegetation. Reducing solar radiation can weaken the conditions for the generation of sandstorms and wind and sand flows.

[0055] Wind and sand barrier function: The sand barriers commonly used in sandy areas are mostly low vertical firewood sand barriers, clay sand barriers and plastic net sand barriers, which are usually only 20 to 30 cm high. The height of photovoltaic panels is generally above 2.5 meters, which can block and intercept most of the sand and dust in the wind and sand flow.

[0056] Rainwater collection promotes biological growth: Photovoltaic panels usually have an inclination angle of 35° to 45°. After rainwater falls on the photovoltaic panels, it will fall down to the ground along the inclined panel surface. Studies have shown that the soil moisture content within an 80cm wide area under the photovoltaic panels can be increased by 30% to 60%, that is, the photovoltaic panels form a rainwater collection surface.

Claims

1. A soil and water conservation system for ecological restoration of a pumped storage power station in a desert area, comprising a reservoir basin (1) and a dam body (2) around the reservoir basin (1), characterized in that: The back surface of the dam body (2) is paved with surface soil (18), and photovoltaic devices (3) are laid along the slope of the back of the dam body (2). A plurality of photovoltaic devices (3) are arranged in rows across the slope of the dam body (2), and a plurality of rows of photovoltaic devices (3) are arranged from top to bottom on the slope of the dam body (2). Vegetation (4) is planted in the interval area between the photovoltaic devices (3) and below them. A rainwater collection and drainage system (5) is arranged on the back of the dam body (2) for collecting and storing rainwater for irrigation. The dam body (2) also includes a water replenishment system (13), which is connected to the rainwater collection and drainage system (5). The water replenishment system (13) can transport water in the reservoir basin (1) to the rainwater collection and drainage system (5) for irrigation.

2. The soil and water conservation system for ecological restoration of a pumped storage power station in a desert area according to claim 1 is characterized in that: The photovoltaic device (3) comprises a base (6), the base (6) is fixed on the surface of the dam body (2), a bracket (7) is arranged on the top of the base (6), and a photovoltaic panel (8) is arranged on the surface of the bracket (7).

3. The soil and water conservation system for ecological restoration of a pumped storage power station in a desert area according to claim 2 is characterized in that: The bracket (7) comprises a column (17) with adjustable length and a fixed beam (9), the bottom end of the column (17) is embedded and fixed on the top of the base (6), the top end of the column (17) is hingedly arranged at the bottom center of the fixed beam (9), the photovoltaic panel (8) is installed on the top of the fixed beam (9), and one end of a side support (10) is respectively arranged at both ends of the fixed beam (9), and the other ends of the two side supports (10) are fixed on both sides of the base (6).

4. The soil and water conservation system for ecological restoration of a pumped storage power station in a desert area according to claim 2 is characterized in that: The rainwater collection and drainage system (5) comprises a water collection trough (11), the water collection trough (11) being arranged transversely to the slope of the dam body (2), each of the water collection troughs (11) being placed below the lower edge of the corresponding photovoltaic panel (8), a communicating hose (12) being arranged at the bottom of the side wall of the water collection trough (11) close to the bottom of the slope of the dam body (2), a plurality of the hoses (12) being arranged longitudinally along the slope of the dam body (2), and through holes being evenly distributed on the side walls of the hoses (12).

5. The soil and water conservation system for ecological restoration of a pumped storage power station in a desert area according to claim 4 is characterized in that: The water collecting trough (11) is U-shaped and is arranged within 80 cm of the lower edge of the corresponding photovoltaic panel (8). The top width of the water collecting trough (11) is 30 cm-50 cm.

6. The soil and water conservation system for ecological restoration of a pumped storage power station in a desert area according to claim 4 is characterized in that: The water collecting trough (11) is in the shape of a funnel with an opening at the top. The water collecting trough (11) is arranged within 80 cm of the lower edge of the corresponding photovoltaic panel (8). The width of the top opening of the water collecting trough (11) is 30 cm-50 cm.

7. The soil and water conservation system for ecological restoration of a pumped storage power station in a desert area according to claim 4 is characterized in that: The water replenishment system (13) comprises a water pump (14), the water pump (14) being placed at the bottom of the reservoir basin (1), the output end of the water pump (14) being provided with one end of a water supply pipe (15), the other end of the water supply pipe (15) being connected to a plurality of water supply branches (16), the plurality of water supply branches (16) being respectively connected to the water collection tank (11).

8. A soil and water conservation method for ecological restoration of a pumped storage power station in a desert area, characterized in that: The following steps are involved: S1. Before excavation of the reservoir, the surface soil within the construction site shall be stripped and piled up in the storage yard for preservation; S2. Construction of the reservoir basin and the dam around the reservoir; S3. Build photovoltaic equipment in the area behind the dam around the reservoir; S4. Re-lay the collected surface soil and build a rainwater collection and drainage system; S5. Vegetation restoration: refer to the original vegetation species on the site, sow grass seeds under the photovoltaic panels, plant container seedlings and grass seeds between the photovoltaic panels, and carry out artificial tending regularly; S6. After the vegetation grows, the photovoltaic supports can be gradually removed in batches depending on the vegetation recovery situation to further expand the vegetation range.

9. A method for soil and water conservation for ecological restoration of a pumped storage power station in a desert area according to claim 8, characterized in that: The stripping thickness of the surface soil in step S1 is not less than 20 cm.

10. The method for soil and water conservation for ecological restoration of a pumped storage power station in a desert area according to claim 1, characterized in that: In step S4, organic fertilizer, water retaining agent and soil conditioner are added to the returned surface soil.

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