Ecological shoreline in-situ restoration system and control method based on sponge city

Abstract

The present invention discloses an in-situ ecological shoreline restoration system and control method based on a sponge city. The system comprises a shoreline connection unit, a shoreline purification unit, and an urban residential unit. The shoreline connection unit comprises a primary purification device connected to a river water source via the primary purification device; the shoreline purification unit comprises a secondary purification device, the water inlet of which is connected to the river water source via the shoreline connection unit; and the urban residential unit comprises a tertiary purification device, the water inlet of which is connected to the water outlet of the secondary purification device, which is connected to a water storage source. The present invention utilizes the characteristics of sponge cities to restore ecological shorelines, effectively controlling the location of the ecological shoreline and purifying water resources. This improves the water storage capacity of cities along the river and reduces water consumption.

Description

Technical Field

[0001] The present invention relates to an ecological shoreline in-situ restoration system and a control method based on a sponge city. Background Art

[0002] Sponge city is a new generation of urban stormwater management concept. It means that the city can adapt to environmental changes and respond to natural disasters caused by rainwater like a sponge, and has good elasticity. It can also be called a "water-elastic city."

[0003] The internationally accepted term for this is "low-impact development rainwater system construction." This system absorbs, stores, infiltrates, and purifies rainwater during rainfall, releasing and utilizing it when needed, allowing for the free movement of rainwater within the city. The core of sponge cities lies in the cross-scale construction of water ecological infrastructure, focusing on ecosystem services and integrating a variety of specific technologies.

[0004] Ecological shoreline in-situ restoration technology is a method of restoration using natural vegetation, soil, and shoreline structure to restore the ecological functions and ecological safety of the shoreline. This technology mainly includes the following aspects: Vegetation restoration: The shoreline is consolidated and protected through the root system and leaf area of ​​plants. At the same time, plants can absorb and purify pollutants in water bodies, improving the quality of the ecological environment; Soil improvement: The soil structure and water retention capacity are improved by adding organic matter and microorganisms, increasing the stability and wind erosion resistance of the shoreline. Structural reinforcement: Ecological revetments, ecological slopes and other structures are set up on the shoreline to improve the impact resistance and stability of the shoreline. At the same time, these structures can also provide support for plant growth. Ecological monitoring: Monitor and evaluate the ecological environment of the shoreline to promptly discover and solve problems and ensure the effectiveness of ecological restoration.

[0005] The existing in-situ restoration scheme for ecological shorelines has poor effects, single functions, and cannot effectively improve water storage capacity. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the existing in-situ ecological shoreline restoration scheme in the prior art, which has poor effect, single function, and cannot effectively improve water storage capacity. It provides an ecological shoreline in-situ restoration system and control method based on sponge city, which can effectively control the position of the ecological shoreline, purify water resources, and at the same time improve the water storage capacity of cities along the river and reduce water resource consumption.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] An ecological shoreline in-situ restoration system based on sponge city, the ecological shoreline in-situ restoration system includes a shoreline connection unit, a shoreline purification unit and an urban residential unit.

[0009] The shoreline connection unit includes a primary purification device, and the shoreline connection unit is connected to the river water source through the primary purification device;

[0010] The shoreline purification unit includes a secondary purification device, and the water inlet of the secondary purification device is connected to the river water source through the shoreline connection unit;

[0011] The urban residential unit comprises a three-stage purification device, the water inlet of the three-stage purification device is connected to the water outlet of the two-stage purification device, and the water outlet of the three-stage purification device is connected to a water storage source.

[0012] Preferably, the ecological shoreline in-situ restoration system includes a sand placement position for placing sand and gravel, and the water inlet of the first-level purification device is provided below the sand and gravel at the sand placement position.

[0013] Preferably, the secondary purification device includes a first vertical submerged flow artificial wetland and a surface flow artificial wetland, the water inlet of the first purification device is connected to the bottom water inlet of the first vertical submerged flow artificial wetland, the first vertical submerged flow artificial wetland is provided with a filter filling and the top water outlet is connected to the water inlet of the surface flow artificial wetland.

[0014] Preferably, the secondary purification device includes a second vertical submerged flow artificial wetland, the top water inlet of the second vertical submerged flow artificial wetland is connected to the water outlet of the surface flow artificial wetland, the second vertical submerged flow artificial wetland is provided with a filter filling and the bottom water outlet is connected to the water inlet of the tertiary purification device.

[0015] Preferably, the urban residential unit includes at least one underground water reservoir and several irrigation devices, the three-stage purification device includes a green area, the green area is arranged above the underground water reservoir, and the green area includes a vegetation layer, a planting soil layer, a filtration layer and a fixed layer from top to bottom. The irrigation device is connected to the outlet of the second vertical subsurface flow artificial wetland and is used to irrigate the green area, and the outlet of the underground water reservoir is connected to the water storage source.

[0016] Preferably, the ecological shoreline in-situ restoration system also includes a return water pipe and a control module, the first water inlet of the return water pipe is connected to the water storage source and is provided with a first electric valve, the first water outlet of the return water pipe is connected to the river water source and is provided with a second electric valve, the second water outlet of the return water pipe is connected to the surface flow type artificial wetland and is provided with a third electric valve, a fourth electric valve is provided between the top water outlet of the first vertical submerged flow type artificial wetland and the water inlet of the surface flow type artificial wetland, the second water inlet of the return water pipe is connected to the underground water storage tank and is provided with a fifth electric valve, and the first electric valve, the second electric valve, the third electric valve, the fourth electric valve and the fifth electric valve are all connected to the control module.

[0017] Preferably, the control module is used to open the first electric valve and the third electric valve and close the second electric valve, the fourth electric valve and the fifth electric valve to inject water into the surface flow type artificial wetland;

[0018] The control module is further configured to open the first electric valve and the second electric valve and close the third electric valve and the fifth electric valve to inject water into the river water source.

[0019] Preferably, a first flow meter is provided between the top outlet of the first vertical submerged flow artificial wetland and the water inlet of the surface flow artificial wetland, a second flow meter is provided on the bottom outlet of the second vertical submerged flow artificial wetland, and a first water level meter and a second water level meter are provided on the underground water reservoir and the water source, respectively.

[0020] The control module is used to control a sixth electric valve between the water outlet of the underground water reservoir and the water source according to the flow value obtained by the first flow meter and the water level value obtained by the first water level meter;

[0021] The control module is further configured to control the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, and the fifth electric valve according to the first water level and the water level values ​​obtained by the second water level meter and the flow value obtained by the first flow meter.

[0022] Preferably, the second water outlet is provided with an outlet branch connected to the bottom water inlet of the first vertical submerged flow artificial wetland, and the top water outlet of the first vertical submerged flow artificial wetland is provided with a return water branch connected to the river water source, and the outlet branch and the return water branch are both provided with electric valves, and the control module is used for:

[0023] When the flow value obtained by the first flow meter is less than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the second electric valve and the fifth electric valve are opened and the first electric valve and the third electric valve are closed to inject water into the river water source;

[0024] When the flow value obtained by the first flow meter is less than the first flow threshold and the water level value obtained by the first water level meter is less than the second water level threshold, the first electric valve and the second electric valve are opened and the third electric valve and the fifth electric valve are closed to inject water into the river water source;

[0025] When the flow value obtained by the first flow meter is greater than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the sixth electric valve is opened and the first electric valve is closed to inject water into the water storage source;

[0026] When the water level value obtained by the first water level gauge is less than the third water level threshold and the water level value obtained by the second water level gauge is greater than the fourth water level threshold, the first electric valve and the third electric valve are opened and the second electric valve, the fourth electric valve, the fifth electric valve and the sixth electric valve are closed to inject water into the underground water reservoir in one direction;

[0027] When the flow value obtained by the first flow meter is greater than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the fourth electric valve is opened and the sixth electric valve is closed to inject water into the underground water tank in one direction.

[0028] The present invention also provides a control method, which is used to control the ecological shoreline in-situ restoration system as described above.

[0029] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0030] The positive progress effect of the present invention is:

[0031] The present invention utilizes the characteristics of sponge cities to repair ecological coastlines, which can not only effectively control the position of ecological coastlines, but also has the function of purifying water resources. At the same time, it can improve the water storage capacity of cities along the river and reduce water resource consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural diagram of the ecological shoreline in-situ restoration system of Example 1 of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0034] Example 1

[0035] See also Figure 1 , this embodiment provides an ecological shoreline in-situ restoration system based on sponge city.

[0036] The ecological shoreline in-situ restoration system includes a shoreline connection unit, a shoreline purification unit and an urban residential unit.

[0037] The shoreline connection unit includes a primary purification device 11, and the shoreline connection unit is connected to the river water source through the primary purification device;

[0038] The shoreline purification unit includes a secondary purification device 21, the water inlet of which is connected to the river water source through a shoreline connection unit;

[0039] The urban residential unit includes a tertiary purification device 31 , the water inlet of the tertiary purification device is connected to the water outlet of the secondary purification device, and the water outlet of the tertiary purification device is connected to a water storage source 41 (reservoir, lake, etc.).

[0040] The water storage and purification functions of sponge cities are utilized to store and transport river water, purify river banks and control water levels, thus playing a certain role in flood prevention.

[0041] When the water level is high, water can be delivered to urban residential units through shoreline purification units, and further to water storage sources;

[0042] When the water level is low, rainwater and purified water stored in urban residential units can be obtained as needed, and further water can be replenished through water storage sources.

[0043] In addition, if the water level of the water storage source is high, water can be transferred to the urban residential units as needed, thereby increasing the water storage capacity of the urban residential units and reducing evaporation.

[0044] The ecological shoreline in-situ restoration system includes a sand placement position 12 for placing sand and gravel, and a water inlet 13 of the first-level purification device is provided below the sand and gravel at the sand placement position.

[0045] The sand-throwing position is used as a natural purification device to play a certain filtering role. The first-level purification device can be a primary filtering device such as a filter to filter impurities and sediment.

[0046] The secondary purification device 21 includes a first vertical submerged flow artificial wetland 211 and a surface flow artificial wetland 212. The water inlet of the first purification device is connected to the bottom water inlet 213 of the first vertical submerged flow artificial wetland. The first vertical submerged flow artificial wetland is provided with a filter filling and the top water outlet 214 is connected to the water inlet 215 of the surface flow artificial wetland.

[0047] Surface flow artificial wetlands can be used as landscape to improve the compatibility of the system with the environment.

[0048] The secondary purification device includes a second vertical submerged flow artificial wetland 216, the top water inlet of the second vertical submerged flow artificial wetland is connected to the outlet of the surface flow artificial wetland, and the second vertical submerged flow artificial wetland is provided with a filter filling and the bottom water outlet 217 is connected to the water inlet of the tertiary purification device 31.

[0049] The urban residential unit includes at least one underground water reservoir 311 and several irrigation devices 312. The three-stage purification device includes a green area 313. The green area is arranged above the underground water reservoir 311. The green area includes a vegetation layer, a planting soil layer, a filtration layer and a fixed layer from top to bottom. The irrigation device is connected to the outlet of the second vertical subsurface flow artificial wetland and is used to irrigate the green area 313. The outlet of the underground water reservoir 311 is connected to the water storage source.

[0050] The water in the underground reservoir can reach a higher level of purification after being purified by primary, secondary and tertiary purification devices, and can meet the water needs of fountains, greening and other landscape gardens in urban residential units.

[0051] The ecological shoreline in-situ restoration system further includes a return water pipe 411 and a control module 51 .

[0052] The first water inlet 412 of the return water pipe 411 is connected to the water storage source and is provided with a first electric valve 511;

[0053] The first water outlet 413 of the return water pipe is connected to the river water source and is provided with a second electric valve 512;

[0054] The second water outlet 414 of the return pipe is connected to the surface flow type artificial wetland and is provided with a third electric valve 513;

[0055] A fourth electric valve 514 is provided between the top water outlet of the first vertical submerged flow artificial wetland and the water inlet of the surface flow artificial wetland;

[0056] The second water inlet 415 of the return water pipe is connected to the underground water tank and is provided with a fifth electric valve 515;

[0057] The second water inlet can directly use the return pipe to transport water from the underground water tank to the river water source in one direction.

[0058] The first electric valve, the second electric valve, the third electric valve, the fourth electric valve and the fifth electric valve are all connected to the control module.

[0059] The electric valve and the control module can be connected via wired or wireless connection, and the control module can be a mobile terminal, a desktop computer or a cloud processor.

[0060] This embodiment utilizes electric valves, water pumps, and terrain differences to achieve water mobilization.

[0061] Specifically, the control module is used to open the first electric valve and the third electric valve and close the second electric valve, the fourth electric valve, and the fifth electric valve, so that the water storage reservoir injects water into the surface flow type artificial wetland, and the water is injected into the surface flow type artificial wetland and purified by the second vertical subsurface flow type artificial wetland before injecting water into the underground water storage tank;

[0062] The control module is further configured to open the first electric valve and the second electric valve and close the third electric valve and the fifth electric valve to inject water into the river water source.

[0063] A first flow meter is provided between the top outlet of the first vertical submerged flow artificial wetland and the water inlet of the surface flow artificial wetland, a second flow meter is provided on the bottom outlet of the second vertical submerged flow artificial wetland, and a first water level meter and a second water level meter are provided on the underground water reservoir and the water source, respectively.

[0064] The control module is used to control the sixth electric valve 516 between the outlet of the underground water reservoir and the water source according to the flow value obtained by the first flow meter and the water level value obtained by the first water level meter, so as to realize one-way water supply from the underground water reservoir to the water source. When the water source supplies water to the underground water reservoir, it is necessary to open the first electric valve and the third electric valve and close the second electric valve, the fourth electric valve, the fifth electric valve and the sixth electric valve, and inject water into the underground water reservoir after water injection into the surface flow type artificial wetland and purification in the second vertical subsurface flow type artificial wetland.

[0065] The control module is further configured to control the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, and the fifth electric valve according to the first water level and the water level values ​​obtained by the second water level meter and the flow value obtained by the first flow meter.

[0066] The second water outlet is provided with an outlet branch connected to the bottom water inlet of the first vertical submerged flow artificial wetland, and the top water outlet of the first vertical submerged flow artificial wetland is provided with a return water branch connected to the river water source. Both the outlet branch and the return water branch are provided with electric valves. The water storage source and the underground water tank can choose to use the first vertical submerged flow artificial wetland for evolution before entering the river water source, which can play a certain flushing and cleaning role.

[0067] The control module is used for:

[0068] When the flow value obtained by the first flow meter is less than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the second electric valve and the fifth electric valve are opened and the first electric valve and the third electric valve are closed, so that the underground water reservoir is injected into the river water source;

[0069] When the flow value obtained by the first flow meter is less than the first flow threshold and the water level value obtained by the first water level meter is less than the second water level threshold, the first electric valve and the second electric valve are opened and the third electric valve and the fifth electric valve are closed, so that the stored water source injects water into the river water source;

[0070] When the flow value obtained by the first flow meter is greater than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the sixth electric valve is opened and the first electric valve is closed, and the underground water reservoir is injected into the water source by a water pump, thereby realizing one-way water transportation;

[0071] When the water level value obtained by the first water level gauge is less than the third water level threshold and the water level value obtained by the second water level gauge is greater than the fourth water level threshold, the first electric valve and the third electric valve are opened and the second electric valve, the fourth electric valve, the fifth electric valve and the sixth electric valve are closed, so that the water source injects water into the underground water reservoir in a one-way manner;

[0072] When the flow value obtained by the first flow meter is greater than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the fourth electric valve is opened and the sixth electric valve is closed, and the river water source injects water into the underground water reservoir in a one-way manner.

[0073] In this embodiment, the threshold serves as an explanation and is not fixed to a specific value. It can be adjusted according to actual conditions. In addition, the threshold can also refer to a range value.

[0074] Utilizing the above-mentioned ecological shoreline in-situ restoration system, this embodiment further provides a control method, including:

[0075] The control module opens the first electric valve and the third electric valve and closes the second electric valve, the fourth electric valve, and the fifth electric valve to inject water into the surface flow type artificial wetland;

[0076] The control module opens the first electric valve and the second electric valve and closes the third electric valve and the fifth electric valve to inject water into the river water source.

[0077] The control method further includes:

[0078] The control module controls a sixth electric valve between the water outlet of the underground water reservoir and the water source according to the flow value obtained by the first flow meter and the water level value obtained by the first water level meter;

[0079] The control module controls the first electric valve, the second electric valve, the third electric valve, the fourth electric valve and the fifth electric valve according to the first water level and the water level value obtained by the second water level meter and the flow value obtained by the first flow meter.

[0080] The control method further includes:

[0081] When the flow value obtained by the first flow meter is less than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the second electric valve and the fifth electric valve are opened and the first electric valve and the third electric valve are closed to inject water into the river water source;

[0082] When the flow value obtained by the first flow meter is less than the first flow threshold and the water level value obtained by the first water level meter is less than the second water level threshold, the first electric valve and the second electric valve are opened and the third electric valve and the fifth electric valve are closed to inject water into the river water source;

[0083] When the flow value obtained by the first flow meter is greater than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the sixth electric valve is opened and the first electric valve is closed to inject water into the water storage source;

[0084] When the water level value obtained by the first water level gauge is less than the third water level threshold and the water level value obtained by the second water level gauge is greater than the fourth water level threshold, the first electric valve and the third electric valve are opened and the second electric valve, the fourth electric valve, the fifth electric valve and the sixth electric valve are closed to inject water into the underground water reservoir in one direction;

[0085] When the flow value obtained by the first flow meter is greater than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the fourth electric valve is opened and the sixth electric valve is closed to inject water into the underground water tank in one direction.

[0086] This embodiment is based on the sponge city's ecological coastline in-situ restoration system and control method to utilize the characteristics of the sponge city to repair the ecological coastline, which can not only effectively control the position of the ecological coastline, but also has the function of purifying water resources. At the same time, it can improve the water storage capacity of cities along the river and reduce water resource consumption.

[0087] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. An ecological shoreline in-situ restoration system based on sponge city, characterized by: The ecological shoreline in-situ restoration system includes a shoreline connection unit, a shoreline purification unit and an urban residential unit. The shoreline connection unit includes a primary purification device, and the shoreline connection unit is connected to the river water source through the primary purification device; The shoreline purification unit includes a secondary purification device, and the water inlet of the secondary purification device is connected to the river water source through the shoreline connection unit; The urban residential unit includes a three-stage purification device, the water inlet of the three-stage purification device is connected to the water outlet of the two-stage purification device, and the water outlet of the three-stage purification device is connected to a water storage source; The secondary purification device includes a first vertical submerged flow artificial wetland and a surface flow artificial wetland, the water inlet of the first purification device is connected to the bottom water inlet of the first vertical submerged flow artificial wetland, the first vertical submerged flow artificial wetland is provided with a filter filler and the top water outlet of the first vertical submerged flow artificial wetland is connected to the water inlet of the surface flow artificial wetland; The secondary purification device includes a second vertical submerged flow artificial wetland, the top water inlet of the second vertical submerged flow artificial wetland is connected to the water outlet of the surface flow artificial wetland, the second vertical submerged flow artificial wetland is provided with a filter filler and the bottom water outlet of the second vertical submerged flow artificial wetland is connected to the water inlet of the tertiary purification device; The urban residential unit includes at least one underground water reservoir and a plurality of irrigation devices. The three-stage purification device includes a green area, which is located above the underground water reservoir. The green area includes, from top to bottom, a vegetation layer, a planting soil layer, a filtration layer, and a fixed layer. The irrigation device is connected to the outlet of the second vertical subsurface flow artificial wetland and is used to irrigate the green area. The outlet of the underground water reservoir is connected to the water source. The ecological shoreline in-situ restoration system also includes a return pipe and a control module, the first water inlet of the return pipe is connected to the water storage source and is provided with a first electric valve, the first water outlet of the return pipe is connected to the river water source and is provided with a second electric valve, the second water outlet of the return pipe is connected to the surface flow type artificial wetland and is provided with a third electric valve, a fourth electric valve is provided between the top water outlet of the first vertical subsurface flow type artificial wetland and the water inlet of the surface flow type artificial wetland, the second water inlet of the return pipe is connected to the underground water storage tank and is provided with a fifth electric valve, and the first electric valve, the second electric valve, the third electric valve, the fourth electric valve and the fifth electric valve are all connected to the control module; A first flow meter is provided between the top water outlet of the first vertical submerged flow artificial wetland and the water inlet of the surface flow artificial wetland, a second flow meter is provided on the bottom water outlet of the second vertical submerged flow artificial wetland, and a first water level gauge and a second water level gauge are provided on the underground water reservoir and the water source, respectively; The second water outlet is provided with an outlet branch connected to the bottom water inlet of the first vertical submerged flow artificial wetland, and the top water outlet of the first vertical submerged flow artificial wetland is provided with a return water branch connected to the river water source, and the outlet branch and the return water branch are both provided with electric valves.

2. The ecological shoreline in-situ restoration system according to claim 1, characterized in that: The ecological shoreline in-situ restoration system includes a sand-dropping position for dropping sand and gravel, and a water inlet of the first-level purification device is provided below the sand and gravel at the sand-dropping position.

3. The ecological shoreline in-situ restoration system according to claim 1, characterized in that: The control module is used to open the first electric valve and the third electric valve and close the second electric valve, the fourth electric valve and the fifth electric valve to inject water into the surface flow type artificial wetland; The control module is further configured to open the first electric valve and the second electric valve and close the third electric valve and the fifth electric valve to inject water into the river water source.

4. The ecological shoreline in-situ restoration system according to claim 1, characterized in that: The control module is used to control a sixth electric valve between the water outlet of the underground water reservoir and the water source according to the flow value obtained by the first flow meter and the water level value obtained by the first water level meter; The control module is further configured to control the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, and the fifth electric valve according to the water level values ​​obtained by the first water level meter and the second water level meter and the flow value obtained by the first flow meter.

5. The ecological shoreline in-situ restoration system according to claim 4, characterized in that: The control module is used for: When the flow value obtained by the first flow meter is less than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the second electric valve and the fifth electric valve are opened and the first electric valve and the third electric valve are closed to inject water into the river water source; When the flow value obtained by the first flow meter is less than the first flow threshold and the water level value obtained by the first water level meter is less than the second water level threshold, the first electric valve and the second electric valve are opened and the third electric valve and the fifth electric valve are closed to inject water into the river water source; When the flow value obtained by the first flow meter is greater than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the sixth electric valve is opened and the first electric valve is closed to inject water into the water storage source; When the water level value obtained by the first water level gauge is less than the third water level threshold and the water level value obtained by the second water level gauge is greater than the fourth water level threshold, the first electric valve and the third electric valve are opened and the second electric valve, the fourth electric valve, the fifth electric valve and the sixth electric valve are closed to inject water into the underground water tank in one direction.

6. A control method, characterized in that: The control method is used to control the ecological shoreline in-situ restoration system according to claim 5, and the control method includes: When the flow value obtained by the first flow meter is less than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the second electric valve and the fifth electric valve are opened and the first electric valve and the third electric valve are closed to inject water into the river water source; When the flow value obtained by the first flow meter is less than the first flow threshold and the water level value obtained by the first water level meter is less than the second water level threshold, the first electric valve and the second electric valve are opened and the third electric valve and the fifth electric valve are closed to inject water into the river water source; When the flow value obtained by the first flow meter is greater than the first flow threshold and the water level value obtained by the first water level meter is greater than the first water level threshold, the sixth electric valve is opened and the first electric valve is closed to inject water into the water storage source; When the water level value obtained by the first water level gauge is less than the third water level threshold and the water level value obtained by the second water level gauge is greater than the fourth water level threshold, the first electric valve and the third electric valve are opened and the second electric valve, the fourth electric valve, the fifth electric valve and the sixth electric valve are closed to inject water into the underground water tank in one direction.

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