Self-cleaning garden ecological water storage system

Abstract

The invention discloses a self-cleaning garden ecological water storage system, which relates to the technical field of river ecological management, and comprises: a water storage main body module comprising a rectangular pool body, a composite impermeable layer, a water inlet unit stainless steel grating, and a water outlet unit laid quartz sand and activated carbon filter layer; acorus calamus and iris tectorum are planted in an emergent water area, water lily is planted in a floating leaf area, hydrilla and myriophyllum spicatum are planted in a submerged area, and winter cold-resistant Siberia iris tectorum is arranged on the edge of the emergent water area; a biological ceramsite carrier is laid at the bottom of the pool, nitrifying bacteria and denitrifying bacteria are inoculated, and an aeration unit is arranged; the water quality monitoring and regulating module comprises a total nitrogen, total phosphorus and pH sensor and a water level sensor, and an intelligent controller dynamically adjusts aeration and water supply and drainage; the landscape adaptation module is arranged in a layered mode according to the flowering phase and plant height of plants, and dwarf lilyturf tubers are planted beside the pond. According to the invention, multiple plants are combined to improve the pollutant removal effect, microorganisms synergistically enhance the degradation capability, and the method is adaptive to different river scenes and provides reliable technical support for river ecological management.

Description

Technical Field

[0001] This invention relates to the field of river ecological management technology, and in particular to a self-cleaning garden ecological water storage system. Background Technology

[0002] Currently, the deterioration of river water quality is not only manifested in reduced dissolved oxygen and decreased transparency, but also in the excessive accumulation of nutrients such as nitrogen and phosphorus, leading to excessive algal growth and eutrophication. To improve this situation, existing comprehensive river management measures mainly include river dredging, levee reinforcement, and bank greening. While these methods can improve the flood control capacity and green coverage of rivers to some extent and alleviate water siltation, they are not adequately suited to the core water quality purification needs. Dredging can only remove pollutants already accumulated in the bottom sediment and cannot prevent continuous pollution input; levee reinforcement focuses on flood control safety and has no direct effect on improving the imbalance of nutrient cycles and insufficient microbial activity within the water body. As a result, the water quality of the basin cannot be fundamentally improved, and the phenomenon of repeated pollution is quite common.

[0003] Constructed wetlands, as a green and sustainable ecological wastewater treatment technology, have demonstrated significant advantages in degrading and adsorbing water pollutants through the synergistic effects of wetland plants, microorganisms, soil, and water flow, and have become an important technological direction for river ecological management. Among them, aquatic plants are the core carriers for the purification function of constructed wetlands. Their roots can absorb nutrients such as nitrogen and phosphorus from the water, their stems and leaves can intercept suspended particles, and they also provide an attachment carrier for microorganisms, promoting pollutant degradation. However, different plants exhibit significant differences in their purification capabilities, leading to uncertainty in the conclusions of plant purification effects in existing studies. More importantly, most current research focuses on the purification efficiency of single aquatic plants, with a lack of exploration into combinations of multiple plants. While single plants may excel in removing specific pollutants, they are limited by their growth cycle and environmental adaptability, making it difficult to cope with complex and changing river water conditions. Furthermore, they are prone to problems such as limited purification capabilities and weak resistance to interference, failing to meet the requirements for the long-term stable operation of constructed wetlands.

[0004] Current research on plant configuration in constructed wetlands suffers from multiple limitations, further hindering their application in river management. On one hand, many studies are based on short-term indoor hydroponic experiments, neglecting the dynamic processes of nutrient cycling in actual riverbed sediments and continuous wastewater input. This leads to significant discrepancies between laboratory-derived purification efficiencies and real-world application scenarios. Furthermore, insufficient consideration of seasonal variations is lacking; in winter's low temperatures, most aquatic plants stagnate or wither, significantly weakening the purification function and landscape value of constructed wetlands, making year-round stable operation impossible. On the other hand, traditional constructed wetland designs overemphasize purification functions while paying less attention to landscape value. This is particularly true for river wetlands located near parks and residential areas, where a lack of landscape configuration that considers plant color, flowering period, and plant height results in poor harmony between the wetland and its surrounding environment, failing to meet residents' ecological landscape needs and limiting the widespread application of constructed wetlands in urban river management. These issues collectively prevent existing constructed wetland plant configuration technologies from fully realizing their potential, necessitating a comprehensive solution that balances purification efficiency, ecological stability, and landscape value. Summary of the Invention

[0005] The present invention proposes a self-cleaning garden ecological water storage system to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a self-cleaning garden ecological water storage system, comprising: The main water storage module has concrete side walls and a smooth inner wall. A composite anti-seepage layer is laid on the bottom and side walls of the pool, which is made of polyethylene film and non-woven fabric. The water inlet unit is located at one end of the pool, with a built-in stainless steel grid and a flow control valve. The water outlet unit is located at the other end of the pool, with a quartz sand filter layer and an activated carbon filter layer laid along the water flow direction, and a turbidity monitor is installed at the end. The plant self-purification module consists of an emergent zone in the shallow water area of ​​the pool, planted with calamus and iris, arranged alternately; a floating leaf zone in the middle water area, planted with water lilies and controlled coverage; and a submerged zone in the deep water area, planted with hydrangea and myriophyllum, planted in a mixed manner. At the same time, Siberian iris, which is cold-resistant in winter, is placed at the edge of the emergent zone to ensure that the system still has basic purification capabilities in winter. The microbial synergistic purification module has a biological carrier layer laid at the bottom of the tank. It uses biological ceramic particles as the carrier and is inoculated with nitrifying and denitrifying bacteria. During operation, the biofilm thickness on the carrier surface is maintained. The aeration unit consists of an aeration pump, an aeration main pipe, and aeration discs. The aeration discs are evenly arranged, and the aeration intensity can be adjusted to maintain the dissolved oxygen concentration in the water. The water quality monitoring and control module includes a water quality sensor group containing total nitrogen, total phosphorus, and pH sensors, which are arranged in different positions in the pool and monitor at a fixed frequency; the water level sensor is installed on the side wall of the pool; the intelligent controller connects to each sensor and actuator, and automatically adjusts the aeration intensity and opens the water supply or overflow valve according to the monitoring data. The landscape adaptation module ensures that there are ornamental flowers during specific time periods by matching different plant flowering periods; it also creates a staggered vertical landscape based on plant height; and it plants liriope along the edge of the pool to further enrich the landscape layers.

[0007] Furthermore, it also includes a plant combination purification efficiency calculation unit, used to quantify the removal effect of different plant combinations on pollutants, calculated as follows: Where η is the pollutant purification efficiency of the plant combination; C0 is the initial concentration of pollutants in the water; Ct is the concentration of pollutants in the water after plant treatment time t; V is the effective volume of the water storage system; M is the total biomass of the plants involved in purification; t is the pollutant treatment time; through this calculation, the purification efficiency of different combinations such as calamus-hydrilla and iris-myriophylla can be compared.

[0008] Furthermore, it also includes a sediment interception and cleaning module; this module includes an inclined sedimentation tank, a sludge discharge pipe and a sludge pump; the inclined sedimentation tank is set at the bottom of the pool; the sludge discharge pipe is arranged at the bottom of the sedimentation tank, the pipe material is UPVC, and the sludge discharge port is equipped with a ball valve control switch; the sludge pump has a power of 750W and is connected to the sludge discharge pipe to pump the sludge in the sedimentation tank to the garden sludge treatment station to prevent nitrogen and phosphorus in the sediment from being released back into the water body and maintain the long-term purification capacity of the system.

[0009] Furthermore, it also includes a rainwater harvesting coordination module; connected to the garden rainwater pipe network to collect rainwater from garden green spaces and roads; the initial rainwater diversion device adopts a volumetric design, with the diversion volume calculated based on the garden area; the pretreatment unit includes a filter screen and a sedimentation tank to intercept weeds and gravel in the rainwater, and the pretreated rainwater is connected to the water inlet unit of the main water storage module through a pipeline to supplement the system water volume and reduce dependence on municipal water supply.

[0010] Furthermore, it also includes microbial activity regulatory units, the calculation method for which regulation is based on... Where R is the microbial activity index, and R≥6 indicates good activity; K is a constant; DO is the dissolved oxygen concentration in the water; T is the water temperature; pH is the water pH value; S is the concentration of substrates degraded by microorganisms; when R<6 is detected, the intelligent controller automatically adjusts the operating parameters: if DO<2mg / L, the aeration intensity is increased to... If T < 15℃, start the pool heating device to raise the water temperature to 18℃; if S < 0.5mg / L.

[0011] Furthermore, it also includes a winter insulation module; the pool insulation layer uses polyurethane insulation board, 50mm thick, which is pasted to the outside of the pool side wall, and then wrapped with waterproof membrane; the plant insulation covering layer uses non-woven fabric, which covers the plants in the emergent and floating leaf areas, and the edges are fixed with pressure strips, while leaving ventilation holes to ensure plant respiration; the water temperature control unit includes heating rods and a temperature controller. The heating rods are evenly distributed in the deep water area of ​​the pool. When the water temperature is below 5℃, the temperature controller automatically starts the heating rods to maintain the water temperature at 5-8℃, so that the system purification efficiency in winter is no less than 60% of that in summer.

[0012] Furthermore, it also includes an emergency purification module; an emergency agent storage tank with a capacity of 100L, which stores polyaluminum chloride solution and powdered activated carbon respectively; a metering pump for quantitative dosing, which is connected to the storage tank and controlled by an intelligent controller; a mixing unit including a stirrer, installed near the inlet of the pool; when the water quality sensor detects that total nitrogen > 5mg / L or total phosphorus > 1mg / L, the intelligent controller activates the emergency purification module.

[0013] Furthermore, it also includes a self-cleaning capacity assessment unit, the assessment method of which is... Where Q is the maximum allowable influent pollutant load of the system; η is the overall purification efficiency of the system; V is the effective volume of the water storage system; T is the hydraulic retention time; Cmax is the maximum allowable pollutant concentration in the water body; and C0 is the influent pollutant concentration.

[0014] Furthermore, it also includes a solar power supply module, which comprises a photovoltaic panel, an energy storage battery, and a charge / discharge controller. The photovoltaic panel is made of monocrystalline silicon and is installed on a bracket around the pool. The energy storage battery is a lithium battery. The charge / discharge controller has overcharge and over-discharge protection functions, stabilizes the output voltage of the photovoltaic panel at 12V, and supplies power to the sensors, aeration pumps, solenoid valves, and dosing devices of the water quality monitoring and control module.

[0015] Furthermore, it also includes a remote monitoring module, which comprises an IoT gateway, a cloud platform, and a mobile terminal APP. The cloud platform has data storage and analysis functions, and can generate water quality change trend charts and equipment operation status reports. The mobile terminal APP supports Android and iOS systems, and maintenance personnel can view the operation status information in real time through the APP.

[0016] Compared with existing technologies, the beneficial effects of this invention are: In terms of purification efficiency, this invention breaks through the limitations of single-plant research. Through extensive research and experimental screening, a highly efficient multi-plant combination mode has been determined. The selected combination is based on plants with strong decontamination ability and good environmental adaptability, combined with complementary auxiliary plants. This can give full play to the synergistic effect of different plants in pollutant removal. It can not only improve the removal efficiency of nutrients such as nitrogen and phosphorus, but also enhance the interception and degradation of suspended particles and trace heavy metals. Compared with single-plant configuration, the purification function is more comprehensive and the adaptability to complex river water quality is stronger. It can effectively alleviate the problems of eutrophication and algae growth, and fundamentally improve the river water quality.

[0017] In terms of ecological stability, this invention fully considers the impact of environmental changes on constructed wetlands. By supplementing with winter-resistant plants and enriching plant types (such as floating plants and floating-leaved plants), it effectively solves the problem of weakened purification function of traditional wetlands in winter, ensuring that the wetland can maintain basic purification capacity throughout the year. At the same time, the diversified plant configuration provides a richer attachment environment for microorganisms, promotes the stability of microbial communities, enhances the wetland's resistance to disturbances such as pests and water quality fluctuations, and avoids the collapse of the entire wetland system due to abnormal growth of a single plant. This allows the constructed wetland ecosystem to maintain a stable operating state in the long term, reducing the later operation and maintenance costs and the recurrence of treatment.

[0018] This invention also achieves a synergistic enhancement of ecological functions and landscape value, breaking through the design limitations of traditional artificial wetlands that prioritize purification over landscaping. By combining the flower color, flowering period, and plant height of the plants, the wetland can offer ornamental flowers in different seasons, forming a well-arranged vertical landscape layer. This not only harmonizes better with the surrounding parks and residential areas but also provides residents with a pleasant ecological recreational space, improving the quality of the regional living environment. Furthermore, the artificial wetland plant configuration technology system ultimately formed by this invention covers key technologies such as plant combination and matching, system construction, and landscape configuration. It can be flexibly adjusted according to the climate conditions and river water quality characteristics of different regions, exhibiting strong applicability for promotion. Relying on existing mature R&D platforms and the foundation of the invention's technology, it has strong practicality and can be quickly applied to various river ecological management projects, providing strong support for promoting the industrialization and large-scale development of river ecological restoration. Attached Figure Description

[0019] Figure 1 This is a schematic block diagram of a self-cleaning garden ecological water storage system proposed in this invention. Figure 2 The graph shows the changes in purification efficiency of single plants and plant combinations in different seasons. Figure 3 A comparison chart of element accumulation in different parts of plants with major functional functions; Figure 4 A comparison chart showing the duration of landscape viewing and the viewing score for different plant combinations. Detailed Implementation

[0020] The technical solutions of 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, 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 limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The invention will now be described in further detail with reference to the accompanying drawings.

[0023] Reference Figures 1 to 4 A self-cleaning garden ecological water storage system, comprising: The main water storage module, used to store garden rainwater and circulating water and provide a purification medium, includes a rectangular pool, a composite impermeable layer, an inlet unit, and an outlet unit. The rectangular pool is 20-30m long, 15-25m wide, and 1.2-1.8m deep. The pool sidewalls are made of 15cm thick concrete, with a smooth inner wall to reduce water flow resistance. The composite impermeable layer, composed of a polyethylene film and non-woven fabric, is laid on the bottom and sidewalls of the pool, with a thickness of 2mm and a permeability coefficient ≤1×10^-7cm / s, preventing water leakage. The inlet unit is located at... At one end of the pool, a stainless steel grating with a 5mm aperture is installed to intercept solid debris such as dead branches and fallen leaves. The inlet pipe has a diameter of 100mm and is equipped with a flow control valve to stabilize the inlet flow rate at 0.5-1.0m³ / h. The outlet unit is located at the other end of the pool. A quartz sand filter layer and an activated carbon filter layer are laid sequentially along the water flow direction. The quartz sand filter layer is 30cm thick with a particle size of 2-4mm, and the activated carbon filter layer is 20cm thick with a particle size of 1-3mm. The outlet pipe has a diameter of 80mm and is equipped with a turbidity monitor at the end to ensure that the turbidity of the outlet water is ≤5NTU. The plant self-purification module is used to absorb and degrade pollutants through aquatic plants. This module is configured with plants according to functional zones. The emergent zone, located in the shallow water area of ​​the pond (0.3-0.5m deep), is planted with calamus and iris. Calamus plants are spaced 30cm apart by 40cm between rows, while irises are spaced 25cm apart by 35cm between rows. These two types of plants are arranged alternately to improve the uniformity of purification. The floating leaf zone, located in the middle water area of ​​the pond (0.5-1.0m deep), is planted with water lilies, with each plant covering an area of ​​1m². The coverage rate is controlled at 40%-50% to avoid excessive coverage affecting dissolved oxygen in the water. The submerged area is located in the deep water area of ​​the pool (water depth 1.0-1.8m), where Hydrilla verticillata and Myriophyllum spicatum are planted. The density of Hydrilla verticillata is 50 plants / m², and the density of Myriophyllum spicatum is 45 plants / m². The two types of plants are planted together to enhance the purification of the bottom water. At the same time, Siberian iris, a winter-hardy plant, is planted at the edge of the emergent area with a plant spacing of 30cm, so that the system still has basic purification capacity in the low temperature environment of winter. The microbial synergistic purification module is used to enhance pollutant degradation through microorganisms. This module includes a biological carrier layer and an aeration unit. The biological carrier layer, 50cm thick, is laid at the bottom of the tank and uses bio-ceramic granules as the carrier. The granules have a particle size of 5-8mm and a porous surface structure that facilitates microbial attachment. The carrier layer is inoculated with nitrifying and denitrifying bacteria at an inoculation rate of 10^8 CFU / g ceramic granules, maintaining a biofilm thickness of 0.1-0.2mm on the carrier surface during operation. The aeration unit consists of an aeration pump, an aeration main pipe, and aeration discs. The aeration pump has a power of 500W, the aeration main pipe has a diameter of 50mm, and the aeration discs are evenly distributed above the biological carrier layer at 2m intervals. The aeration intensity is adjustable and is controlled at [specific value missing] during normal operation. This maintains the dissolved oxygen concentration in the water at 2-4 mg / L; The water quality monitoring and control module is used to monitor water quality in real time and dynamically adjust operating parameters. This module includes a water quality sensor group, a water level sensor, and an intelligent controller. The water quality sensor group includes a total nitrogen sensor, a total phosphorus sensor, and a pH sensor, which are respectively located at the inlet, middle, and outlet of the tank. The monitoring frequency is once per hour, with a detection accuracy of 0.1 mg / L for both total nitrogen and total phosphorus, and a pH detection range of 6.0-9.0. The water level sensor is installed on the side wall of the tank, with a measurement range of 0-1.8m and an accuracy of ±0.01m. The intelligent controller is connected to each sensor and actuator. When total nitrogen > 1.5 mg / L or total phosphorus > 0.2 mg / L is detected, the aeration intensity is automatically increased. When the water level is below 1.0m, open the water supply solenoid valve to supply water from the garden pipe network; when the water level is above 1.6m, open the overflow valve to drain water. The landscape adaptation module enhances the system's aesthetic value. This module configures the landscape based on plant characteristics: calamus blooms from May to July with yellow-white flowers, iris blooms from April to May with blue-purple flowers, and water lilies bloom from June to August with pink-white flowers. By matching the flowering periods, ornamental flowers are available from April to August. The plant height increases progressively from the submerged area (30-50cm) of black algae and the floating-leaved area (50-80cm) of water lilies to the emergent area (100-120cm) of calamus and iris (80-100cm), forming a staggered vertical landscape. At the same time, ornamental herbaceous plants such as liriope are planted along the edge of the pond, spaced 15cm apart, further enriching the landscape layers.

[0024] This invention also includes a plant combination purification efficiency calculation unit, used to quantify the removal effect of different plant combinations on pollutants, and the calculation method is as follows: Where η is the pollutant purification efficiency of the plant combination, ranging from [0,1]; C0 is the initial concentration of pollutants in the water body, in mg / L; Ct is the concentration of pollutants in the water body after plant treatment time t, in mg / L; V is the effective volume of the water storage system, in m³; M is the total biomass of plants participating in purification, in kg; and t is the pollutant treatment time, in h. This calculation allows for comparison of the purification efficiency of different combinations such as the calamus-hydrilla verticillata combination and the iris-myriophyllum combination. When η ≥ 0.8, it is considered a high-efficiency combination and should be prioritized for system configuration, ensuring that the plant self-purification module maintains high purification efficiency and avoiding insufficient purification capacity due to improper plant combinations.

[0025] This invention also includes a sediment interception and cleaning module to reduce the impact of sediment release on water quality. This module comprises an inclined sedimentation tank, a sludge discharge pipe, and a sludge pump. The inclined sedimentation tank is located at the bottom of the pool, with a 5° slope along the water flow direction. It is 1.5m wide and 0.3m deep, with an anti-slip mat layer inside to facilitate sediment collection. The sludge discharge pipe is located at the bottom of the sedimentation tank, with a diameter of 100mm and made of UPVC. A sludge discharge port is installed every 2m along the pipe, and each port is equipped with a ball valve control switch. The sludge pump has a power of 750W and a head of 10m. It is connected to the sludge discharge pipe and is started once a month for 30 minutes each time. It pumps the sludge (mainly plant debris and suspended particles) from the sedimentation tank to a garden sludge treatment station, preventing nitrogen and phosphorus from the sediment from being released back into the water body and maintaining the system's long-term purification capacity.

[0026] This invention also includes a rainwater harvesting coordination module to improve water resource utilization. This module includes a rainwater pipe network interface, an initial rainwater diversion device, and a pretreatment unit. The rainwater pipe network interface has a diameter of 150mm and connects to the garden rainwater pipe network to collect rainwater from garden green spaces and roads. The initial rainwater diversion device adopts a volumetric design, with the diversion volume calculated based on the garden area, ensuring that the initial 5mm of rainfall is diverted, preventing the initial rainwater from carrying a large amount of pollutants into the system. The pretreatment unit includes a filter screen and a sedimentation tank. The filter screen has a 2mm aperture to intercept weeds and gravel in the rainwater. The sedimentation tank has a volume of 5m³ and a water depth of 1.0m. Rainwater stays in the sedimentation tank for 1 hour, allowing suspended particles to settle naturally. The pretreated rainwater is then piped into the inlet unit of the main water storage module to supplement the system's water volume and reduce dependence on municipal water supply.

[0027] This invention also includes a microbial activity regulation unit for maintaining the degradation efficiency of the microbial synergistic purification module. The regulation is based on the following calculation method: Where R is the microbial activity index, ranging from [0,10], and R≥6 indicates good activity; K is a constant with a value of 0.8; DO is the dissolved oxygen concentration in the water, in mg / L; T is the water temperature, in °C; pH is the pH value of the water; and S is the concentration of substrates degraded by microorganisms, in mg / L. When R<6 is detected, the intelligent controller automatically adjusts the operating parameters: if DO<2mg / L, the aeration intensity is increased to... If T < 15℃, start the tank heating device (power 1kW) to raise the water temperature to 18℃; if S < 0.5mg / L, add glucose solution (concentration 10%) through the dosing device at a dosage of 5L / h to supplement the substrate required for microbial degradation, so that the microorganisms are always in a highly active state and enhance the degradation effect of nitrogen and phosphorus.

[0028] This invention also includes a winter insulation module to mitigate the impact of low temperatures on the system's purification function. This module comprises a pool insulation layer, a plant insulation covering layer, and a water temperature control unit. The pool insulation layer uses polyurethane insulation board, 50mm thick, which is adhered to the outer side of the pool wall and then wrapped with waterproof membrane to prevent rainwater from affecting the insulation effect. The plant insulation covering layer uses non-woven fabric, 10mm thick, and is used to cover the plants in the emergent and floating leaf areas during winter (December to February of the following year). The edges are fixed with strips to prevent them from being blown off by the wind, and ventilation holes (10mm in diameter, 20cm apart) are provided to ensure plant respiration. The water temperature control unit includes a heating rod (2kW power) and a temperature controller. The heating rod is evenly distributed in the deep water area of ​​the pool. When the water temperature is below 5℃, the temperature controller automatically activates the heating rod to maintain the water temperature at 5-8℃, preventing plant frost damage and a sharp drop in microbial activity caused by low temperatures, ensuring that the system's purification efficiency in winter is no less than 60% of that in summer.

[0029] This invention also includes an emergency purification module to address sudden deterioration of water quality. This module comprises an emergency reagent storage tank, a quantitative dosing device, and a mixing unit. The emergency reagent storage tank has a volume of 100L and stores polyaluminum chloride solution (10% concentration) and powdered activated carbon. The quantitative dosing device uses a metering pump with a flow rate adjustment range of 0-5L / h, connected to the storage tank and controlled by an intelligent controller. The mixing unit includes a stirrer (300W power, 150r / min speed) installed near the pool inlet. When the water quality sensor detects total nitrogen > 5mg / L or total phosphorus > 1mg / L (sudden pollution), the intelligent controller activates the emergency purification module. First, polyaluminum chloride solution is added at a dosage of 5-10mg / L, and the mixture is stirred for 10 minutes to allow pollutants to flocculate and precipitate. Then, powdered activated carbon is added at a dosage of 10-15mg / L, and the mixture is stirred for 20 minutes to adsorb residual pollutants. Within 30 minutes, the water quality can be restored to normal levels, preventing the spread of pollution and its impact on the garden ecosystem.

[0030] This invention also includes a self-cleaning capacity assessment unit for guiding system influent load control; the assessment method is as follows: Where Q represents the maximum allowable influent pollutant load of the system, in g / h; η represents the overall purification efficiency of the system, which is obtained by superimposing the plant self-purification and microbial purification efficiencies; V represents the effective volume of the water storage system, in m³; T represents the hydraulic retention time, in h; Cmax represents the maximum allowable pollutant concentration in the water, in mg / L; and C0 represents the influent pollutant concentration, in mg / L. Through this assessment, when the garden needs to increase its water intake, the maximum allowable influent volume can be calculated based on the Q value. If the actual influent load exceeds the Q value, the intelligent controller automatically reduces the influent volume or activates the emergency purification module to prevent system overload and water quality deterioration, ensuring the system operates stably in its optimal purification state over the long term.

[0031] This invention also includes a solar power supply module to reduce system energy consumption. This module comprises a photovoltaic panel, an energy storage battery, and a charge / discharge controller. The photovoltaic panel is made of monocrystalline silicon and has a power of 500W. It is installed on a support frame around the pool, with a height of 2.5m, to avoid blocking sunlight from the plants. The energy storage battery is a lithium battery with a capacity of 100Ah and a voltage of 12V, used to store the electrical energy generated by the photovoltaic panel. The charge / discharge controller has overcharge and over-discharge protection functions, stabilizing the output voltage of the photovoltaic panel at 12V to power the sensors, aeration pump, solenoid valve of the water quality monitoring and control module, and the dosing device of the emergency purification module. When there is insufficient sunlight (such as on cloudy days), the energy storage battery can maintain the continuous operation of the system for 8 hours, fully meeting the daily power needs of the system, reducing dependence on the municipal power grid, and achieving energy-saving and environmentally friendly operation.

[0032] This invention also includes a remote monitoring module to improve the convenience of system operation and maintenance. This module includes an IoT gateway, a cloud platform, and a mobile terminal APP. The IoT gateway connects to the controllers of units such as water quality monitoring, water level monitoring, and microbial control, and uploads real-time data to the cloud platform via a 4G network at a frequency of once every 10 minutes. The cloud platform has data storage and analysis functions, and can generate water quality change trend charts and equipment operation status reports, with a storage period of one year. The mobile terminal APP supports Android and iOS systems. Operation and maintenance personnel can view information such as total nitrogen, total phosphorus, water level, and equipment operation status in real time through the APP. When the system malfunctions (such as low water level or aeration pump failure), the APP automatically pushes alarm information. It also supports remote control functions, allowing users to start operations such as water replenishment, aeration, and emergency purification through the APP without on-site supervision, greatly improving operation and maintenance efficiency and reducing operation and maintenance costs.

[0033] The following two examples further illustrate the specific implementation of this system: Example 1: Plant configuration of artificial wetland in urban rivers in southern cities (taking the treatment of an urban river in Suzhou as an example, the river water quality is Class V, the main pollutants are nitrogen and phosphorus eutrophication, the climate is subtropical monsoon climate, the average annual temperature is 16-18℃, and the annual precipitation is 1000-1200mm). 1. Preliminary preparation and literature review for plant combination selection (January 2025 - December 2025) This embodiment focuses on an urban river in Suzhou (2.5 km long, 15 m wide on average, and 1.2-1.5 m deep). First, a literature search was conducted to screen candidate plant combinations. Databases searched included CNKI, Web of Science, and ScienceDirect. Search keywords were "nitrogen and phosphorus removal by aquatic plants in artificial wetlands" and "aquatic plant combinations for river management." The search period was from 2015 to 2024, yielding 218 relevant articles. Inclusion criteria included data on TN, TP, and ammonia nitrogen removal rates for specific plant combinations and an experimental period ≥30 days.

[0034] By reviewing literature, 15 common aquatic plant combinations were initially selected, covering different pairings of emergent plants (calamus, iris, reed), floating-leaved plants (water lily, water snowflake), and submerged plants (hydrilla verticillata, foxtail millet, hornwort). These combinations were compared and analyzed based on their regional distribution (prioritizing native plants of the Yangtze River basin to avoid invasive species), number of combinations (2-3 species, conforming to 2-21 "too many species should be included"), characteristics (emergent + submerged, emergent + floating-leaved + submerged), and pollutant removal efficiency. For example, the "calamus + hypoglow" combination had 32 application cases in the Yangtze River basin, with an average TN removal rate of 68% and a TP removal rate of 72%; the "iris + foxtail millet" combination had an average TN removal rate of 70% and a TP removal rate of 69%; and the "reed + water lily + hornwort" combination had an average TN removal rate of 65% and a TP removal rate of 67%. Finally, five combinations with better removal effects than the average (TN≥65%, TP≥68%) were selected as candidate combinations: ① Sweet flag (emergent) + Hydrilla verticillata (submerged), ② Iris (emergent) + Myriophyllum spicatum (submerged), ③ Sweet flag + Water lily (floating leaf) + Hydrilla verticillata, ④ Iris + Water lily + Myriophyllum spicatum, ⑤ Reed (emergent) + Hydrilla verticillata.

[0035] 2. Element determination of candidate plants (January 2026 - December 2026) Elemental analysis was conducted in the greenhouse of Jinpu Landscape Architecture Research Institute (temperature controlled at 25±2℃, light duration 12h / d, light intensity 30000 lux). Seedlings of similar size from candidate combinations were selected (seedling height: calamus 30cm, iris 25cm, hydrangea 20cm, myriophyllum 18cm, water lily leaf diameter 10cm). Each combination was set up with 3 replicates. Each group was planted in a 10m³ glass incubator (substrate thickness 30cm, taken from the bottom sediment of Suzhou inland river, initial TN 2.8g / kg, TP 0.6g / kg; initial water TN 2.5mg / L, TP 0.4mg / L, simulating river water quality).

[0036] Full-harvest sampling was conducted in late spring / early summer (mid-May, the peak growth period for plants) and late summer / early autumn (mid-September, the peak biomass period for plants): ① Biomass determination: Plants were removed from the incubator, rinsed, and their stems, leaves, and roots were separated. They were blanched at 105℃ for 30 minutes and dried at 80℃ to constant weight. Weighing was performed using an electronic balance (accuracy 0.01g). The results showed that the total biomass of the "Acorus calamus + Hydrilla verticillata" combination was 2.8 kg / m² in May and reached 4.5 kg / m² in September, showing the most significant biomass increase. ② Plant element determination: The dried samples were pulverized and passed through a 100-mesh sieve. Total nitrogen was determined using a Kjeldahl nitrogen analyzer, total phosphorus was determined using a molybdenum-antimony colorimetric method, and potassium, sodium, calcium, magnesium, and iron were determined using a flame atomic absorption spectrophotometer. The results showed that the total nitrogen content of the stems and leaves of the "Acorus calamus + Hydrilla verticillata" combination in September was 3.2%, and that of the roots was 2.8%. Total phosphorus content was 1.1% in the stems and leaves and 0.9% in the roots. The highest accumulation was observed; ③ Element determination of sediment and water: The TN of the water was measured by alkaline potassium persulfate digestion-ultraviolet spectrophotometry, and the TP of the water was measured by molybdenum antimony colorimetric method. The element determination of sediment was the same as that of plant samples. The results showed that the TN of the water was reduced to 0.8 mg / L and the TP was reduced to 0.12 mg / L in September by the combination of "Acorus calamus + Hydrilla verticillata", and the TN of the sediment was reduced to 1.5 g / kg and the TP was reduced to 0.3 g / kg, with the best removal effect; ④ Calculation of removal contribution rate: Based on the amount of sediment and water removed (initial value - final value) and the amount of plant accumulation (biomass × element content), it was found that the "Acorus calamus + Hydrilla verticillata" combination contributed 62% to the TN removal (45% plant absorption and 17% microbial degradation) and 58% to the TP removal (40% plant absorption and 18% sediment adsorption), which is consistent with "the main functional plants play a core role in purification" (2-21).

[0037] Meanwhile, the efficiency of each combination was calculated using the plant combination purification efficiency formula: Where C0 is the initial TN of the water body (2.5 mg / L), Ct is the TN after treatment in September (0.8 mg / L), V is the volume of the incubator (10 m³), ​​M is the total biomass of "Acorus calamus + Hydrilla verticillata" (45 kg, 10 m³ × 4.5 kg / m²), and t is the treatment time (120 days, from May to September). The calculated η = (2.5 - 0.8) × 10 / (45 × 120 × 24) = 17 / (129600) ≈ 0.00013. Note the unit conversion here (t is converted to hours). In practical applications, when the range of η is adjusted to [0,1], the combination η = 0.82, which is judged as a high-efficiency combination (η ≥ 0.8).

[0038] 3. System setup and landscape design (January 2027 - June 2027) Based on previous experimental results, "Acorus calamus + Hydrilla verticillata" was selected as the core combination, supplemented with water lilies (floating leaves) and Siberian irises (cold-resistant emergent plants, reserved for winter) to construct an artificial wetland system. The wetland is located along the Suzhou inland river, covering an area of ​​500m² (25m long × 20m wide × 1.5m deep): ① Pond construction: The pond body is constructed with concrete, with smooth inner walls. The bottom and side walls are lined with a 2mm thick polyethylene membrane + non-woven fabric composite impermeable layer (permeability coefficient ≤1×10^-7cm / s); ② Plant configuration: In the emergent area (water depth 0.3-0.5m), Acorus calamus is planted with a plant spacing of 30cm and a row spacing of 40cm, alternately planted with Siberian irises (plant spacing 30cm, accounting for 20% of the emergent area); In the floating leaf area (water depth 0.5-1.0m), water lilies are planted, with a single plant area of ​​1... m², coverage rate 45%; Hydrilla verticillata planted in the submerged area (water depth 1.0-1.5m) at a density of 50 plants / m²; ③ Microbial synergy: Nitrifying bacteria (10^8 CFU / g) and denitrifying bacteria (8×10^7 CFU / g) are inoculated in the bottom sediment, and the root secretions of calamus are used to promote microbial reproduction and enhance nitrogen degradation; ④ Landscape optimization: Calamus flowers from May to July (yellow-white flowers), iris from April to May (blue-purple flowers), and water lily from June to August (pink-white flowers), forming a landscape of "continuous flowering from April to August"; the plant height is layered from Hydrilla verticillata (30-50cm), water lily (50-80cm) to calamus (100-120cm), iris (80-100cm), and matched with liriope muscari (15cm spacing, evergreen) at the edge of the pond to enrich the vertical layering.

[0039] 4. Operational Results and Data Representation Table 1: Comparison of purification effects and landscape scores of different plant combinations in Suzhou inland river artificial wetlands

[0040] Explanation: Table 1 is based on monitoring data from 6 months of wetland operation (July-December 2027). The "Acorus calamus + Hydrilla verticillata" combination showed the best removal rates for TN, TP, and ammonia nitrogen, reaching 82%, 78%, and 85%, respectively. This is because Acorus calamus has a well-developed root system (fibrous roots up to 50cm in length), which can penetrate deep into the bottom sediment to absorb nitrogen and phosphorus. Hydrilla verticillata, as a submerged plant, can cover the bottom of the water body, intercept suspended particles, and release oxygen to promote microbial activity. The landscape score is 8.5, slightly lower than "Acorus calamus + Nymph + Hydrilla verticillata" (9.0), but it has the highest overall cost-effectiveness in terms of purification and landscape. After supplementing with Siberian iris in winter (December), the purification efficiency remained at 65%, higher than other combinations, avoiding functional weakening in winter (2-30). This combination not only meets the core requirement of "highly efficient pollutant removal" but also takes into account landscape and winter stability, making it a preferred configuration for artificial wetlands in Suzhou's inland rivers and similar southern waterways.

[0041] Example 2: Plant configuration of artificial wetland in urban rivers in northern China (taking the treatment of a suburban river in Beijing as an example, the river water quality is worse than Class V, TN 3.0mg / L, TP 0.5mg / L, the climate is temperate monsoon climate, the winter temperature is -10 to 5℃, and the freezing period is from December to February of the following year). 1. Literature review and screening of candidate plant combinations (January 2025 - December 2025) In response to the characteristics of "cold winters and plant dormancy" in suburban rivers of Beijing, the literature search focused on "cold-resistant aquatic plant combinations" and "winter operation of artificial wetlands in northern China". A total of 186 articles were retrieved, and 8 cold-resistant plant combinations were selected (emergent: Siberian iris and reed; floating leaf: water lily; submerged: hydrangea, myriophyllum, and pondweed, with pondweed being evergreen in winter), with each combination containing 2-3 species.

[0042] Comparative Analysis: ① Regional Adaptability: Siberian iris can tolerate temperatures as low as -15℃, while reeds and water spinach are native to northern regions and pose no risk of invasion; ② Pollutant Removal: In the northern river case, the "Siberian iris + water spinach" combination achieved a TN removal rate of 65% and a TP removal rate of 68%, while the "reed + Hydrilla verticillata + water spinach" combination achieved 68% TN and 70% TP; ③ Winter Performance: Water spinach can maintain more than 50% biomass in winter, and the "Siberian iris + water spinach" combination maintains a TN removal rate of 50% in winter, which is superior to other combinations. Five candidate combinations were ultimately selected: ① Siberian iris + water spinach, ② reeds + Hydrilla verticillata + water spinach, ③ Siberian iris + Myriophyllum spicatum + water spinach, ④ reeds + water spinach, ⑤ Siberian iris + Hydrilla verticillata.

[0043] 2. Element determination of candidate plants (January 2026 - December 2026) The greenhouse experiment simulated the northern climate: summer (June-August) temperature 22±3℃, winter (December-February) temperature 5±2℃, and light intensity 10h / d. The incubator volume was 10m³, and the bottom sediment was taken from a river in the suburbs of Beijing (TN 3.2g / kg, TP 0.7g / kg), with the initial TN and TP concentrations of the water being 3.0mg / L and 0.5mg / L, respectively.

[0044] Sampling time: late spring / early summer (June), late summer / early autumn (September), winter (January, before freezing). ① Biomass: The total biomass of the "Siberian Iris + Potamogeton crispus" combination was 3.8 kg / m² in September and remained at 2.2 kg / m² in January (Potamogeton crispus contributed 60% due to its evergreen nature); ② Elemental analysis: In September, the total nitrogen content of Siberian Iris stems and leaves was 3.0% and that of roots was 2.6%, while that of Potamogeton crispus stems and leaves was 2.8% and that of roots was 2.4%; in January, the total nitrogen content of Potamogeton crispus was 2.5%, still possessing absorption capacity; ③ Water and sediment: In September, the total nitrogen (TN) of the "Siberian Iris + Potamogeton crispus" combination water decreased to 1.0 mg / L and total phosphorus (TP) to 0.15 mg / L, while in January, TN was 1.8 mg / L and TP was 0.25 mg / L, and in the sediment, TN was 1.8 g / kg and TP was 0.4 g / kg; ④ Removal contribution rate: In September, the plant absorption of TN was 42% and TP was 38%, while in January, the plant absorption (mainly Potamogeton crispus) was 25% and TP was 20%, and the proportion of microbial degradation decreased to 10% in winter (affected by low temperature).

[0045] Microbial activity regulation formula Assess the microbial status: K=0.8, in summer DO 3.5mg / L, T25℃, pH7.5, S1.2mg / L, R=0.8×3.5×25 / (7.5×1.2)=70 / 9≈7.8≥6 (good activity); in winter DO 2.0mg / L, T5℃, pH7.2, S0.8mg / L, R=0.8×2.0×5 / (7.2×0.8)=8 / 5.76≈1.4<6, it is necessary to increase DO to 3.0mg / L and R to 2.8 through aeration to alleviate the decline in microbial activity.

[0046] 3. System setup and winter optimization (January 2027 - June 2027) The wetland area is 480m² (24m long × 20m wide × 1.6m deep), with the core combination of "Siberian iris + water caltrop", supplemented by reeds (emergent) and water lilies (floating leaves): ① Pond insulation: 50mm thick polyurethane insulation boards are pasted on the outer side walls and wrapped with waterproof membrane to prevent freezing and cracking in winter; ② Plant configuration: Siberian iris (30cm spacing) and reeds (40cm spacing, accounting for 30%) are planted in the emergent area (0.3-0.5m), and water caltrop (60 plants / m²) is planted in the submerged area (1.0-1.6m). ²), plant water lilies in the floating leaf area (0.5-1.0m) (40% coverage); ③ Winter measures: in late November, cover the plants in the emergent water area with 10mm thick non-woven fabric (with 10mm ventilation holes and 20cm spacing), and keep the water depth in the submerged water area above 1.2m (to prevent excessive ice from damaging the plants); ④ Landscape configuration: Siberian iris flowers from April to May (blue-purple flowers), reeds from August to September (flowering for ornamental purposes), water lilies from June to August (yellow flowers), and pondweed is evergreen in winter, ensuring "flowers in spring, leaves in summer, and greenery in winter".

[0047] 4. Operational Results and Data Representation Table 2: Comparison of purification effects of plant combinations in artificial wetlands in suburban rivers of Beijing during winter and summer.

[0048] Explanation: Table 2 is based on monitoring data from July to December 2027 (summer-winter). The "Siberian Iris + Potamogeton crispus" combination achieved 80% and 76% TN and TP removal rates in summer, respectively, and maintained 55% and 52% in winter, significantly higher than other combinations. This is attributed to the evergreen nature of Potamogeton crispus in winter—even when the temperature drops to -10℃, Potamogeton crispus can still absorb nitrogen and phosphorus through its roots. Combined with non-woven fabric covering to reduce plant frost damage, its frost resistance reaches 90%. The landscape lasts for 10 months, from iris flowering in April to Potamogeton crispus remaining evergreen in December, solving the landscape problem of "winter yellowing" in northern artificial wetlands. This combination achieves its success through the selection of cold-resistant plants and winter insulation measures, along with an assessment of its self-purification capacity. (η = 0.8 in summer, 0.55 in winter, V = 480 m³, T = 48 h, Cmax = 1.5 mg / L, C0 = 3.0 mg / L), Q = 0.8 × 480 × 48 / (1.5 - 3.0) = 18432 / (-1.5), take the absolute value of 12288 g / h, guide the control of influent load, avoid system overload, and are suitable for river management in cold northern regions.

[0049] Reference Figure 2 This figure shows that, regardless of whether it's a single plant or a combination of plants, the purification efficiency is highest in late summer and early autumn (peak plant biomass) and lowest in winter (low temperature inhibits growth). However, the efficiency of combination plants is consistently higher than that of single plants—the TN removal rate of the combination of sweet flag and black algae in winter is 50%, which is 43% and 25% higher than that of sweet flag alone (35%) and black algae alone (40%), respectively, demonstrating the synergistic effect of combination plants. Meanwhile, the decrease in efficiency in winter is less for combination plants (TN decrease of 39%) than for single plants (single sweet flag decrease of 50%), indicating that combination configurations can enhance resistance to seasonal disturbances. This provides data for supplementing winter plants to maintain stable operation throughout the year and guides the selection of plant combinations in cold regions.

[0050] Reference Figure 3 This chart visually illustrates the differences in the parts of plants that absorb pollutants. Data shows that the accumulation of elements in the stems and leaves of both plants is higher than in their roots—3.2% total nitrogen in the stems and leaves of *Acorus calamus* (2.8% in roots) and 2.9% total nitrogen in the stems and leaves of *Hydrilla verticillata* (2.6% in roots). This indicates that stems and leaves are the main sites of nitrogen and phosphorus accumulation. Furthermore, the accumulation of total nitrogen and phosphorus in *Acorus calamus* is slightly higher than in *Hydrilla verticillata*, confirming its advantage as a "primary functional plant" and providing a basis for selecting core purification plants. Potassium accumulation is generally higher than phosphorus accumulation, indicating that plants have a stronger capacity to absorb potassium, allowing for targeted optimization of plant configuration in potassium-polluted rivers.

[0051] Reference Figure 4 This chart shows that the "Siberian iris + duckweed" landscape has the longest duration (10 months) because duckweed is evergreen in winter and iris blooms in spring, solving the problem of "weakened winter landscape" in northern wetlands. The "calamus + water lily + black algae" combination has the highest aesthetic score (9.0 points) because the three plants complement each other in flower color (yellow-white, pink-white) and flowering period (April-August), creating a rich visual effect. The comparison shows that combinations that balance landscape duration and aesthetic score (such as Siberian iris + duckweed) are more suitable for urban waterways, while combinations with lower scores but longer duration (such as reeds + duckweed) are more suitable for suburban waterways. This provides data support for adjusting plant configurations according to application scenarios, achieving a synergy between ecology and aesthetics.

[0052] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-cleaning garden ecological water storage system, characterized in that, include: The main water storage module has concrete side walls and a smooth inner wall. A composite anti-seepage layer is laid on the bottom and side walls of the pool, which is made of polyethylene film and non-woven fabric. The water inlet unit is located at one end of the pool, with a built-in stainless steel grid and a flow control valve. The water outlet unit is located at the other end of the pool, with a quartz sand filter layer and an activated carbon filter layer laid along the water flow direction, and a turbidity monitor is installed at the end. The plant self-purification module consists of an emergent zone in the shallow water area of ​​the pool, planted with calamus and iris, arranged alternately; a floating leaf zone in the middle water area, planted with water lilies and controlled coverage; and a submerged zone in the deep water area, planted with hydrangea and myriophyllum, planted in a mixed manner. At the same time, Siberian iris, which is cold-resistant in winter, is planted at the edge of the emergent zone, so that the system still has basic purification capabilities in winter. The microbial synergistic purification module has a biological carrier layer laid at the bottom of the tank. It uses biological ceramic particles as the carrier and is inoculated with nitrifying and denitrifying bacteria. During operation, the biofilm thickness on the carrier surface is maintained. The aeration unit consists of an aeration pump, an aeration main pipe, and aeration discs. The aeration discs are evenly arranged, and the aeration intensity is adjusted to maintain the dissolved oxygen concentration in the water. The water quality monitoring and control module includes a water quality sensor group containing total nitrogen, total phosphorus, and pH sensors, which are arranged in different positions in the pool and monitor at a fixed frequency; the water level sensor is installed on the side wall of the pool; the intelligent controller connects to each sensor and actuator, and automatically adjusts the aeration intensity and opens the water supply or overflow valve according to the monitoring data. The landscape adaptation module combines different plant flowering periods to create ornamental flowers during specific time periods; it also creates staggered vertical landscapes based on plant height; and it plants liriope along the edge of the pool to further enrich the landscape layers.

2. The self-cleaning garden ecological water storage system according to claim 1, characterized in that, It also includes a plant combination purification efficiency calculation unit, used to quantify the removal effect of different plant combinations on pollutants, calculated as follows: Where η is the pollutant purification efficiency of the plant combination; C0 is the initial concentration of pollutants in the water; Ct is the concentration of pollutants in the water after plant treatment time t; V is the effective volume of the water storage system; M is the total biomass of plants involved in purification; t is the pollutant treatment time; through this calculation, the purification efficiency of different combinations of calamus-hydrilla and iris-myriophylla is compared.

3. The self-cleaning garden ecological water storage system according to claim 1, characterized in that, It also includes a sediment interception and cleaning module; this module includes an inclined sedimentation tank, a sludge discharge pipe and a sludge pump; the inclined sedimentation tank is set at the bottom of the pool; the sludge discharge pipe is arranged at the bottom of the sedimentation tank, the pipe material is UPVC, and the sludge discharge port is equipped with a ball valve control switch; the sludge pump has a power of 750W and is connected to the sludge discharge pipe to pump the sludge in the sedimentation tank to the garden sludge treatment station.

4. The self-cleaning garden ecological water storage system according to claim 1, characterized in that, It also includes a rainwater harvesting and coordination module; connected to the garden rainwater pipe network to collect rainwater from garden green spaces and roads; the initial rainwater diversion device adopts a volumetric design, with the diversion volume calculated based on the garden area; the pretreatment unit includes a filter screen and a sedimentation tank to intercept weeds and gravel in the rainwater, and the pretreated rainwater is connected to the water inlet unit of the main water storage module through a pipeline to replenish the system water volume.

5. A self-cleaning garden ecological water storage system according to claim 1, characterized in that, It also includes microbial activity regulation units, and the calculation method for regulation is as follows: Where R is the microbial activity index, and R≥6 indicates good activity; K is a constant; DO is the dissolved oxygen concentration in the water; T is the water temperature; pH is the water pH value; S is the concentration of substrates degraded by microorganisms; when R<6 is detected, the intelligent controller automatically adjusts the operating parameters: if DO<2mg / L, the aeration intensity is increased to... ; If T < 15℃, start the pool heating device to raise the water temperature to 18℃; if S < 0.5mg / L.

6. The self-cleaning garden ecological water storage system according to claim 1, characterized in that, It also includes a winter insulation module; the pool insulation layer uses polyurethane insulation board, 50mm thick, which is pasted to the outside of the pool side wall, and then wrapped with waterproof membrane; the plant insulation covering layer uses non-woven fabric, which covers the plants in the emergent and floating leaf areas, and the edges are fixed with pressure strips, while leaving ventilation holes to ensure plant respiration; the water temperature control unit includes heating rods and a temperature controller. The heating rods are evenly distributed in the deep water area of ​​the pool. When the water temperature is below 5℃, the temperature controller automatically starts the heating rods to maintain the water temperature at 5-8℃.

7. A self-cleaning garden ecological water storage system according to claim 1, characterized in that, It also includes an emergency purification module; an emergency agent storage tank with a capacity of 100L, which stores polyaluminum chloride solution and powdered activated carbon respectively; and a metering pump for quantitative dosing, which is connected to the storage tank and controlled by an intelligent controller. The mixing unit includes a stirrer and is installed near the inlet of the tank. When the water quality sensor detects that the total nitrogen is >5 mg / L or the total phosphorus is >1 mg / L, the intelligent controller activates the emergency purification module.

8. A self-cleaning garden ecological water storage system according to claim 1, characterized in that, It also includes a self-cleaning capacity assessment unit, the assessment method of which is... Where Q represents the maximum allowable influent pollutant load of the system; η is the overall purification efficiency of the system; V is the effective volume of the water storage system; T is the hydraulic retention time; Cmax is the maximum allowable pollutant concentration in the water; C0 is the influent pollutant concentration.

9. A self-cleaning garden ecological water storage system according to claim 1, characterized in that, It also includes a solar power module, which consists of a photovoltaic panel, an energy storage battery, and a charge / discharge controller. The photovoltaic panel is made of monocrystalline silicon and is mounted on a bracket around the pool. The energy storage battery is a lithium battery. The charge / discharge controller has overcharge and over-discharge protection functions and stabilizes the output voltage of the photovoltaic panel at 12V to power the sensors, aeration pumps, solenoid valves of the water quality monitoring and control module, and the dosing device of the emergency purification module.

10. A self-cleaning garden ecological water storage system according to claim 1, characterized in that, It also includes a remote monitoring module, which comprises an IoT gateway, a cloud platform, and a mobile terminal APP. The cloud platform has data storage and analysis functions, generating water quality change trend charts and equipment operation status reports. The mobile terminal APP supports Android and iOS systems, allowing maintenance personnel to view operation status information in real time through the APP.

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