Slope rainwater circulation system based on spongy rainwater utilization

Abstract

The invention discloses a side slope rainwater circulation system based on spongy rainwater utilization, which relates to the technical field of side slope ecological engineering and comprises a water quality monitoring and grading module, a multi-stage water storage processing module, an intelligent irrigation decision module, a water source dispatching and distributing module and a drip irrigation execution module. According to the system, efficient utilization and accurate distribution of slope rainwater resources are achieved through the intelligent water source dispatching and distributing module, the system can dynamically select the optimal water source unit according to real-time water quality monitoring data and water use requests, reasonable distribution of the water resources is ensured through a grading response strategy, and the water resource utilization rate is improved. When the water consumption demand exceeds the available water consumption of a single water storage unit, the system can automatically generate a new water consumption request, water consumption interruption caused by insufficient water sources is avoided, meanwhile, by monitoring the water level of the water storage unit in real time and calculating the safety capacity margin, the system can effectively prevent and control the water level risk, and stable operation of the system is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of slope ecological engineering, and in particular to a slope rainwater circulation system based on sponge rainwater utilization. Background Art

[0002] With the frequent occurrence of extreme rainfall events and the increasingly severe problem of water shortage, the utilization of rainwater resources and ecological protection in slope areas have become important issues that need to be addressed urgently. As the transition zone between urban and natural ecosystems, slopes not only have the function of preventing soil erosion and ensuring geological stability, but also contain considerable rainwater resource potential. Improper treatment of slope rainwater will not only lead to the wasted loss of a large amount of rainwater resources, but also cause environmental problems such as soil erosion and non-point source pollution due to runoff erosion.

[0003] At present, slope rainwater treatment technology lacks refined water quality grading and intelligent scheduling mechanisms in terms of water quality management. Traditional rainwater collection systems simply distinguish between initial rainwater and later rainwater, and do not conduct real-time monitoring and grading of indicators such as turbidity, pH value, and pollutant content. As a result, high-turbidity rainwater enters the storage directly, causing blockage and secondary pollution. At the same time, rainwater of different water quality cannot be distributed on demand, and high-quality water resources are used at low value, resulting in great waste. At the same time, in the precision irrigation link, the existing system mostly relies on fixed irrigation cycles or empirical thresholds, and cannot be dynamically adjusted in combination with real-time soil moisture conditions, meteorological conditions, and differences in vegetation water requirements. It fails to comprehensively consider energy consumption, water quality matching, and water supply efficiency, resulting in high overall system operating costs and low resource utilization.

[0004] In summary, the existing slope rainwater circulation system has significant defects in the refined management of water quality and precise irrigation control, making it difficult to maximize the utilization of rainwater resources and the sustainable development of slope ecology. Therefore, it is urgent to develop a slope rainwater circulation system with intelligent water quality classification, dynamic water demand response and multi-objective collaborative optimization capabilities to solve the problems of resource waste and high operating costs in traditional technologies. Summary of the Invention

[0005] The purpose of the present invention is to make up for the shortcomings of the existing technology and provide a slope rainwater circulation system based on sponge rainwater utilization. It can build a full-chain intelligent management system of "monitoring-classification-processing-distribution" through the coordinated operation of the water quality monitoring and grading module, the multi-level water storage and treatment module and the water source scheduling and allocation module. The online multi-parameter water quality probe can capture key indicators such as turbidity and pH value in real time, and accurately divide rainwater into three categories of high turbidity, medium turbidity and clean water according to preset standards, and carry out targeted precipitation, filtration, disinfection and other treatments. At the same time, the water source scheduling and allocation module adopts a multi-objective optimization algorithm, combined with the vegetation water demand function and the water storage unit status, to achieve precise distribution of rainwater according to quality, demand and quantity, effectively alleviating the pressure of regional water resource shortage.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a slope rainwater circulation system based on sponge rainwater utilization, the system comprising: a water quality monitoring and classification module, a multi-stage water storage and treatment module, an intelligent irrigation decision module, a water source scheduling and allocation module, and a drip irrigation execution module; The water quality monitoring and grading module is used to monitor the key indicators of incoming rainwater in real time through an online multi-parameter water quality probe, and generate a water quality grade signal according to a preset grading standard and send it to the water source scheduling and allocation module; The multi-stage water storage and treatment module includes independent primary water storage units, purified water storage units, and clean water storage units, which are respectively used to store rainwater of different grades and perform physical and biological treatment; The intelligent irrigation decision module obtains slope environmental data through soil data and meteorological parameters, and generates a water request instruction including irrigation amount, water quality level and irrigation location in combination with the vegetation water demand function, and sends it to the water source scheduling and allocation module through the communication interface; The water source scheduling and allocation module is used to receive the water quality level signal and the water use request instruction, match the corresponding water storage unit in the multi-stage water storage processing module in real time according to the water quality level in the water use request, and control the intelligent valve to deliver the water volume of the matching unit to the drip irrigation execution module; The drip irrigation execution module is used to receive the water source provided by the water source scheduling and allocation module, and perform precise drip irrigation at the designated irrigation location according to the instructions of the intelligent irrigation decision module.

[0007] Furthermore, the water quality monitoring and classification module includes: Online multi-parameter water quality probe: deployed at the entrance of the rainwater confluence channel to monitor the turbidity, pH value and conductivity of rainwater in real time; Grading processing unit: pre-stores water quality grading threshold parameters, receives probe data and executes grading logic: When the turbidity is ≥50NTU, a high turbidity water quality signal is generated; When 20NTU≤turbidity<50NTU, a medium turbidity water quality signal is generated; When the turbidity is <20NTU, a clean water quality signal is generated; Signal transmission interface: Send the generated water quality level signal to the water source scheduling and allocation module in real time.

[0008] Furthermore, the primary water storage unit, the purified water storage unit, and the clean water storage unit in the multi-stage water storage and treatment module are all equipped with water inlets and outlets controlled by an intelligent diverter valve group, specifically including: The primary water storage unit is a sedimentation tank with a bottom sludge outlet. Its water inlet is connected to the rainwater confluence channel through a first intelligent diversion valve. It is used to receive rainwater corresponding to the high turbidity water quality signal generated by the water quality monitoring and grading module. Suspended solids are removed by gravity sedimentation. The upper layer of settled water is discharged through its outlet. The settled sludge at the bottom is regularly removed through the sludge outlet and used for slope ecological restoration. The purified water storage unit includes a sand filter and a biological filter connected in series. The water inlet is connected to the rainwater confluence channel through a second intelligent diversion valve, and is used to receive rainwater corresponding to the medium turbidity water quality signal generated by the water quality monitoring and grading module. The sand filter is filled with multi-layer graded filter media to further remove turbidity, colloids and organic matter. The biological filter is filled with lightweight filter media with attached microorganisms, which uses microbial metabolism to degrade dissolved organic matter. The purified water is discharged through the outlet. Clean water storage unit: It is a closed water storage tank equipped with an overflow port, a drain port and a disinfection sub-unit. The water inlet is connected to the rainwater confluence channel through a third intelligent diversion valve, which is used to receive rainwater corresponding to the clean water quality signal generated by the water quality monitoring and grading module, and can receive the effluent from the purified water storage unit after treatment to meet the standards, disinfect the stored water to ensure the safety of microbial indicators, and the water outlet is connected to the water supply pipeline controlled by the water source scheduling and distribution module.

[0009] Furthermore, the first intelligent diverter valve, the second intelligent diverter valve, and the third intelligent diverter valve are controlled by the water source scheduling and allocation module, and are dynamically opened / closed according to the received water quality level signal, so as to divert rainwater to the corresponding water storage unit according to the water quality level signal; The primary water storage unit, purified water storage unit, and clean water storage unit are independent of each other, and the water flow paths do not interfere with each other. Each unit is equipped with a liquid level sensor to monitor the water level in real time and feed the data back to the water source scheduling and distribution module.

[0010] Furthermore, the intelligent irrigation decision module includes a soil moisture perception unit, a meteorological information collection unit, a vegetation parameter storage unit, a water demand calculation unit and an instruction generation unit, wherein: Soil moisture sensing unit: Soil moisture sensors are buried at different slopes, directions and depths to collect soil volumetric moisture content in real time. and soil temperature soil data; Meteorological information collection unit: collects solar radiation intensity in real time through meteorological monitoring , air temperature , relative humidity , wind speed , rainfall Meteorological parameters; Vegetation parameter storage unit: pre-stores basic parameters of different vegetation types, including potential evapotranspiration coefficient Used to reflect the water requirements and root depth of specific vegetation relative to reference crops Determine the depth of the effective soil water storage layer and the wilting coefficient , indicating the soil moisture content and soil water holding capacity when plants cannot absorb water , which is the maximum water content that the soil can hold; Water demand calculation unit: Calculates the actual water demand of vegetation based on the data collected by the meteorological information collection unit and the vegetation parameter storage unit, combined with the vegetation water demand function ,in, is the slope of the curve of saturated water vapor pressure and temperature and ,Should It reflects the influence of temperature change on water vapor pressure. is the net radiation, with a value range of 0.2-0.3, which is used to characterize the surface's ability to reflect solar radiation. Wind speed adjustment factor , is the wind speed, is the soil heat flux, is the psychrometer constant and , is the specific heat of air at constant pressure and , is atmospheric pressure, is the latent heat of vaporization, is the saturated vapor pressure and , is the actual water vapor pressure and ; Instruction generation unit: based on the actual water demand calculated , current soil moisture content , root depth and soil water holding capacity ,use Calculate the irrigation volume required for a single irrigation , combined with the water quality requirements corresponding to the vegetation distribution area, the corresponding water storage unit is called from the multi-level water storage processing module to match the water quality level, and a water use request instruction including irrigation amount, water quality level and irrigation location is generated.

[0011] Furthermore, the water source scheduling and allocation module includes: Signal receiving unit: Receives the water quality grade signal sent by the water quality monitoring and grading module and the water use request instruction sent by the intelligent irrigation decision module. The water use request instruction includes the required water quality grade, irrigation amount and irrigation location information. At the same time, it obtains the liquid level data and water quality data of each water storage unit in the multi-stage water storage and processing module in real time. The water quality data includes indicators of turbidity, pH value and conductivity; Scheduling decision unit: Based on the water quality requirements in the water request instruction and combined with the real-time water quality data and liquid level data of each water storage unit, a multi-objective optimization is used to calculate the optimal water supply plan; Execution control unit: Based on the optimal water supply plan, generate control instructions and send them to the intelligent diversion valve group, the intelligent diversion valve group includes a first intelligent diversion valve, a second intelligent diversion valve, and a third intelligent diversion valve, which controls the water supply flow of the outlet by adjusting the opening of the flow regulating valve.

[0012] Furthermore, the multi-objective optimization in the scheduling decision unit constructs an objective function to minimize energy consumption, maximize water resource utilization, and meet irrigation demand, and calculates the optimal water supply plan, where: The objective function for minimizing energy consumption is: ,in, is the number of water storage units involved in water supply, For the The energy consumption coefficient of each water storage unit, For the The water supply of each water storage unit, For the The water level difference from the water storage unit to the irrigation location, Reaction energy consumption; The objective function of maximizing water resource utilization is: ,in, For the The water quality matching weight of each water storage unit is in the range of 0-1. For the The amount of water wasted due to water quality mismatch and excessive water supply in each water storage unit, is the total water supply of the system, Reflects water resource utilization rate; The objective function for meeting irrigation demand is: ,in, is the total irrigation volume required by the intelligent irrigation decision module, is the sum of the actual water supply of each water storage unit, Reflects the deviation between the total water supply and demand.

[0013] Furthermore, the scheduling decision unit uses linear weighting to transform the objective function constructed by multiple objectives into a single-objective optimization problem, namely: in, 、 、 is the weight coefficient and , adjust priorities according to actual needs; The constraints are: Water quality matching constraint: Water quality level of each water storage unit satisfy ,in The water quality level requested for water use, including high turbidity, medium turbidity, and clean water; Water Constraints: ,in For the Real-time available water volume of each water storage unit; Pipeline transportation constraints: ,in It is the maximum delivery flow of the water supply pipeline.

[0014] Furthermore, the drip irrigation execution module includes: Water source receiving unit: connected to the water supply pipeline controlled by the water source scheduling and distribution module, receives the water source delivered by the water source scheduling and distribution module, and performs preliminary monitoring of the flow and pressure of the water source; Irrigation control unit: Receives water request instructions from the intelligent irrigation decision module, combines the optimal water supply plan of the water source scheduling and allocation module, and irrigates the target area Compared with the existing technology, this slope rainwater circulation system based on sponge rainwater utilization has the following beneficial effects: 1. The present invention realizes the efficient utilization and precise allocation of slope rainwater resources through an intelligent water source scheduling and allocation module. The system can dynamically select the optimal water source unit based on real-time water quality monitoring data and water use requests, and ensure the rational allocation of water resources through a hierarchical response strategy. When the water demand exceeds the available water volume of a single water storage unit, the system will automatically generate a new water use request, avoiding water use interruptions caused by insufficient water sources. At the same time, by real-time monitoring of the water level of the water storage unit and calculating the safety capacity margin, the system can effectively prevent and control water level risks and ensure the stable operation of the system. This intelligent scheduling mechanism not only improves the utilization rate of rainwater resources, but also significantly reduces the operating costs of the system.

[0015] 2. The present invention endows the system with powerful intelligent decision-making and adaptive adjustment capabilities through the deep linkage between the intelligent irrigation decision-making module and the water source scheduling and allocation module. The intelligent irrigation decision-making module calculates the actual water demand of vegetation based on the data collected by soil moisture sensors and meteorological monitoring, and generates a water use request including water quality, water quantity, and irrigation location. After receiving the request, the water source scheduling and allocation module quickly formulates the optimal water supply plan based on the multi-objective optimization algorithm, and accurately controls the water flow through the intelligent valve group. At the same time, it monitors the water supply process in real time and dynamically adjusts the operation strategy to ensure efficient and stable operation, reduce the cost of manual intervention, and realize intelligent and automated management of slope rainwater recycling.

[0016] Other advantages, objects and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0018] Figure 1 This is an operational flow chart of a slope rainwater recycling system based on sponge rainwater utilization; Figure 2 This is a module composition diagram of a slope rainwater circulation system based on sponge rainwater utilization. DETAILED DESCRIPTION

[0019] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments. Example 1

[0020] This embodiment provides a slope rainwater circulation system based on sponge rainwater utilization, which realizes intelligent management and precise irrigation of rainwater through the coordinated operation of multiple modules. Figure 2As shown in the figure, the system covers five modules: water quality monitoring and classification, multi-level water storage and treatment, intelligent irrigation decision-making, water source scheduling and allocation, and drip irrigation execution. It can carry out real-time monitoring, graded treatment, on-demand distribution and precise irrigation of slope rainwater. It uses online multi-parameter water quality probes to capture key rainwater indicators in real time, combines the physical and biological treatment of multi-level water storage units, cooperates with the water demand calculation of the intelligent irrigation decision-making module and the multi-objective optimization algorithm of the water source scheduling and allocation module, and realizes intelligent control of the entire process of monitoring-classification-treatment-distribution-irrigation, effectively improving the utilization rate of rainwater resources and reducing system operating costs.

[0021] The water quality monitoring and grading module uses an online multi-parameter water quality probe to monitor the key indicators of the incoming rainwater in real time, and generates corresponding water quality grade signals according to the preset grading standards, providing a basis for subsequent rainwater processing and distribution. The module consists of three parts: an online multi-parameter water quality probe, a grading processing unit and a signal transmission interface. Among them, the online multi-parameter water quality probe is arranged at the entrance of the rainwater confluence channel to collect the key parameters of turbidity, pH value and conductivity of rainwater in real time. The turbidity is used as an indicator to reflect the content of suspended particulate matter in rainwater; the grading processing unit pre-stores the water quality grading threshold parameters, and a complete set of grading logic processing mechanism is constructed inside it. When the probe collects real-time data, the grading processing unit will compare the turbidity index with the preset threshold: if the turbidity ≥50NTU, it indicates that the suspended particulate matter content in the rainwater is high. If the amount is high, it belongs to high turbidity water quality, and a high turbidity water quality signal is generated at this time; if 20NTU≤turbidity<50NTU, it is determined to be medium turbidity water quality, and a medium turbidity water quality signal is generated; if the turbidity is <20NTU, it is determined to be clean water quality, and a clean water quality signal is generated. This turbidity-based classification method can effectively distinguish rainwater with different degrees of pollution, laying the foundation for subsequent classification treatment; the signal transmission interface transmits the water quality grade signal generated by the classification processing unit to the water source scheduling and allocation module in real time, ensuring that the water source scheduling module can obtain water quality information in a timely manner, and provide real-time data support for subsequent water source allocation decisions. The entire water quality monitoring and grading module realizes the preliminary screening and classification of rainwater quality through real-time monitoring, intelligent classification and rapid transmission, providing accurate water quality basic data for the subsequent operation of the system.

[0022] The multi-stage water storage and treatment module carries out targeted treatment and storage of rainwater according to the different water quality grade signals generated by the water quality monitoring and grading module, ensuring that rainwater of different water qualities can be reasonably utilized. The module is composed of independent primary water storage units, purified water storage units and clean water storage units. Each unit is equipped with an inlet and outlet controlled by an intelligent diverter valve group, forming a complete hierarchical treatment system. Among them, the primary water storage unit adopts a sedimentation tank structure, and its water inlet is connected to the rainwater confluence channel through the first intelligent diverter valve. It is mainly used to receive rainwater corresponding to the high turbidity water quality signal generated by the water quality monitoring and grading module. When the high turbidity rainwater enters the primary water storage unit, the principle of gravity sedimentation is used to make the suspended solid particles in the rainwater settle in the gravity pool. Under the action of force, it gradually settles to the bottom of the pool. The upper layer of water after precipitation is discharged through the outlet controlled by the first intelligent diversion valve and enters the subsequent treatment link or is directly distributed according to the scheduling instruction. The sludge settled at the bottom is regularly removed through the mud discharge port. The nutrients contained in the sludge are used for slope ecological restoration, realizing the recycling of resources; the purified water storage unit is composed of a sand filter and a biological filter in series, and its water inlet is connected to the rainwater confluence channel through the second intelligent diversion valve, which mainly receives rainwater corresponding to the medium turbidity water quality signal. The sand filter is filled with multiple layers of graded filter materials. These filter materials are arranged in layers according to different particle sizes to form a complex filtration system. When rainwater flows through the sand filter, impurities such as turbidity, colloids and organic matter will be intercepted by the filter material, thereby achieving For further purification, the biological filter is filled with lightweight filter media with attached microorganisms. These microorganisms form a biofilm on the surface of the filter media. When rainwater flows through the biological filter, the microorganisms degrade the dissolved organic matter in the rainwater through metabolism, further improving the water quality. The purified water is discharged through the outlet and can enter the clean water storage unit or be directly used for irrigation as needed; the clean water storage unit is a closed water storage tank, equipped with an overflow port, an emptying port and a disinfection subunit, and its water inlet is connected to the rainwater confluence channel through a third intelligent diversion valve. It mainly receives rainwater corresponding to the clean water quality signal and the outlet water after treatment by the purification storage unit. In order to ensure the safety of the microbial indicators of the stored water, the disinfection subunit in the clean water storage unit will disinfect the stored water. At the same time, the setting of the overflow port and the drain port can effectively prevent the water level in the water tank from being too high or too low, ensuring the safe and stable operation of the water storage unit. The water outlet is connected to the water supply pipeline controlled by the water source scheduling and distribution module, and can provide clean water for the irrigation system in time according to the scheduling instructions; the first intelligent diverter valve, the second intelligent diverter valve and the third intelligent diverter valve are all controlled by the water source scheduling and distribution module, and are dynamically opened or closed according to the received water quality level signal, and the rainwater is accurately diverted to the corresponding water storage unit according to the water quality level. In addition, each water storage unit is equipped with a liquid level sensor to monitor the water level in real time and feed back the data to the water source scheduling and distribution module, providing real-time water volume information for water source scheduling, ensuring that the system can be reasonably scheduled according to the water storage situation of each water storage unit.

[0023] The intelligent irrigation decision-making module obtains slope environmental data and combines it with the vegetation water demand function to generate water request instructions including irrigation volume, water quality level and irrigation location, providing accurate water demand information for the water source scheduling and allocation module. The module consists of a soil moisture perception unit, a meteorological information collection unit, a vegetation parameter storage unit, a water demand calculation unit and an instruction generation unit. Each unit cooperates with each other to form a complete intelligent decision-making system. Among them, the soil moisture perception unit buries soil moisture sensors at different slopes, slope directions and depths of the slope. Its purpose is to comprehensively and real-timely collect soil volume moisture content. and soil temperature Since the soil moisture conditions at different locations of the slope are different and the soil moisture conditions at different depths are also different, by deploying sensors at multiple locations and depths, the soil moisture status of the entire slope can be more accurately reflected, providing reliable soil moisture data for subsequent water demand calculations; the meteorological information collection unit collects solar radiation intensity in real time through meteorological monitoring equipment , air temperature , relative humidity , wind speed , rainfall Meteorological parameters such as evaporation coefficient, evaporation coefficient, and potential evaporation coefficient are important input variables for calculating vegetation water demand. They directly affect the transpiration of vegetation and the evaporation of soil, and thus affect the water demand of vegetation. The vegetation parameter storage unit pre-stores the basic parameters of different vegetation types, including the potential evaporation coefficient. , root depth , wilting coefficient and soil water holding capacity , potential evapotranspiration coefficient Used to reflect the water requirements of specific vegetation relative to reference crops, root depth Determines the depth of the effective soil water storage layer and the wilting coefficient Indicates the soil moisture content when plants cannot absorb water, soil water holding capacity The water demand calculation unit calculates the actual water demand of vegetation based on the data collected by the meteorological information collection unit and the vegetation parameter storage unit, combined with the vegetation water demand function. , the vegetation water demand function is: ,in, is the slope of the curve of saturated water vapor pressure and temperature and This parameter reflects the degree of influence of temperature change on water vapor pressure. Temperature change will directly affect the rate of change of water vapor pressure, and thus affect the transpiration of vegetation. Net radiation (range 0.2-0.3) is used to characterize the surface's ability to reflect solar radiation. The magnitude of net radiation determines the amount of energy received by the surface, thereby affecting the temperature of the soil and vegetation, and further affecting water demand. is the wind speed adjustment factor and The wind speed affects the flow of air, which in turn affects the water vapor exchange and evaporation on the vegetation surface. is the soil heat flux, which reflects the heat exchange between the soil and the atmosphere. is the psychrometer constant and ,in is the specific heat of air at constant pressure ( ), is atmospheric pressure, is the latent heat of vaporization. is the saturated water vapor pressure, is the saturated water vapor pressure, , The size of is closely related to the air temperature. As the temperature rises, the saturated water vapor pressure increases. is the actual water vapor pressure and The actual water vapor pressure reflects the actual water vapor content in the air and is related to the relative humidity and saturated water vapor pressure. The water demand calculation unit can accurately calculate the actual water demand of vegetation by accurately calculating these parameters and combining them with the vegetation water demand function. The instruction generating unit is based on the actual water demand calculated , current soil moisture content , root depth and soil water holding capacity , using the formula Calculate the irrigation volume required for a single irrigation This formula comprehensively considers the soil's water storage capacity, current soil moisture content, rainfall, and the actual water demand of vegetation, and can accurately calculate the amount of irrigation required to meet the growth needs of vegetation. At the same time, the instruction generation unit will also combine the water quality requirements corresponding to the vegetation distribution area, and call the corresponding water storage unit from the multi-level water storage processing module to match the water quality level. Finally, it generates a water request instruction containing the irrigation amount, water quality level, and irrigation location, and sends it to the water source scheduling and allocation module through the communication interface, providing accurate water demand information for water source scheduling.

[0024] The water source scheduling and allocation module receives the water quality grade signal and the water use request instruction, matches the corresponding water storage unit in the multi-level water storage processing module in real time according to the water quality grade in the water use request, and controls the intelligent valve to transport the water volume of the matching unit to the drip irrigation execution module. The module consists of a signal receiving unit, a scheduling decision unit and an execution control unit. The optimal configuration of rainwater resources is achieved through a multi-objective optimization algorithm. Among them, the signal receiving unit is mainly responsible for receiving the water quality grade signal sent by the water quality monitoring and grading module, the water use request instruction sent by the intelligent irrigation decision module, and real-time acquisition of the liquid level data and water quality data of each water storage unit in the multi-level water storage processing module. The water use request instruction contains the required water quality grade, irrigation The information such as water quantity and irrigation location is the core basis of water source scheduling. The liquid level data of each water storage unit reflects the current water storage situation of each unit, ensuring that there will be no water shortage during the scheduling process. The water quality data includes indicators such as turbidity, pH value, and conductivity, which are used to judge whether the water quality of the water storage unit meets the water quality requirements of the water use request; the scheduling decision unit is based on the water quality grade requirements in the water use request instruction, combined with the real-time water quality data and liquid level data of each water storage unit, and uses a multi-objective optimization algorithm to calculate the optimal water supply plan. The multi-objective optimization constructs an objective function with the goals of minimizing energy consumption, maximizing water resource utilization, and meeting irrigation needs. Among them, the objective function of minimizing energy consumption is , where n is the number of water storage units involved in water supply, is the energy consumption coefficient of the i-th water storage unit, which is related to factors such as the location of the water storage unit, the length and diameter of the water supply pipe, and reflects the energy consumed to supply water from the water storage unit. is the water supply of the i-th water storage unit, is the water level difference from the i-th water storage unit to the irrigation location. The larger the water level difference, the greater the energy required for water supply. It reflects the energy consumption of the entire water supply process. By minimizing F1, the operating cost of the system can be reduced. The objective function for maximizing water resource utilization is: ,in is the water quality matching weight of the i-th water storage unit, ranging from 0 to 1. The weight reflects the matching degree between the water quality of the water storage unit and the water quality of the water request. The higher the matching degree, the greater the weight. is the amount of water wasted in the i-th water storage unit due to water quality mismatch and excessive water supply, is the total water supply of the system, It reflects the utilization rate of water resources. By maximizing F2, we can reduce the waste of water resources and improve the water resource utilization efficiency of the system. The objective function to meet the irrigation demand is: , where Q is the total irrigation volume required by the intelligent irrigation decision module, is the sum of the actual water supply of each water storage unit, It reflects the deviation between the total water supply and demand. By minimizing F3, it can ensure that the system can meet the irrigation needs of vegetation and avoid insufficient or excessive water supply. The scheduling decision unit uses a linear weighted method to transform the multi-objective objective function into a single-objective optimization problem, that is, ,in 、 、 is the weight coefficient and + + =1, adjust the priority of each goal according to actual needs. For example, in areas with water shortage, more attention may be paid to maximizing water resource utilization, so the priority can be appropriately increased. In areas with higher energy costs, more emphasis may be placed on minimizing energy consumption and increasing At the same time, the scheduling decision unit also needs to meet the following constraints: water quality matching constraint, that is, the water quality level Ci of the i-th water storage unit satisfies ,in The water quality level requested for water use, including high turbidity, medium turbidity, and clean water, ensures that the water quality can meet irrigation needs; water quantity constraints, ,in is the real-time available water volume of the i-th water storage unit to avoid oversupply; pipeline transportation constraints, ,in The control unit generates a control instruction based on the optimal water supply plan obtained by the scheduling decision unit and sends it to the intelligent diversion valve group. The intelligent diversion valve group includes a first intelligent diversion valve, a second intelligent diversion valve, and a third intelligent diversion valve. The water supply flow of the water outlet is controlled by adjusting the opening of the flow regulating valve to achieve precise control of the water supply of each water storage unit, ensuring that water is supplied according to the optimal water supply plan and accurately delivering water that meets water quality requirements to the drip irrigation execution module.

[0025] The drip irrigation execution module receives the water source provided by the water source scheduling and distribution module, and performs precise drip irrigation at the designated irrigation location according to the instructions of the intelligent irrigation decision module. The module is mainly composed of a water source receiving unit and an irrigation control unit. It realizes efficient use of water resources through precise control. Among them, the water source receiving unit is connected to the water supply pipeline controlled by the water source scheduling and distribution module. Its main function is to receive the water source that meets the water quality requirements delivered by the water source scheduling and distribution module, and to conduct preliminary monitoring of the flow and pressure of the water source to ensure that the water supply status meets the requirements of drip irrigation execution. When the flow or pressure of the water source is abnormal, the water source The receiving unit will promptly feed back information to the water source scheduling and allocation module for corresponding adjustments; the irrigation control unit receives the water use request instructions sent by the intelligent irrigation decision-making module, including irrigation volume, water quality level and irrigation location, and combines the optimal water supply plan of the water source scheduling and allocation module. The irrigation control plan includes determining the drip irrigation area that needs to be turned on, setting parameters such as drip irrigation flow and time, to ensure precise irrigation at the designated irrigation location. At the same time, the irrigation control unit will also interact with the water source receiving unit for data, dynamically adjust the irrigation control plan according to the actual water supply situation, and ensure the stability of the irrigation process.

[0026] In summary, the slope rainwater recycling system based on sponge rainwater utilization provided in this embodiment, through the coordinated operation of the water quality monitoring and grading module, the multi-stage water storage and treatment module, the intelligent irrigation decision module, the water source scheduling and allocation module, and the drip irrigation execution module, has established a complete "monitoring-grading-processing-allocation-irrigation" intelligent management system. The water quality monitoring and grading module realizes real-time monitoring and precise grading of rainwater quality, providing a basis for subsequent processing. The multi-stage water storage and treatment module performs targeted treatment and storage according to different water quality levels, ensuring the rational use of water resources. The intelligent irrigation decision module combines soil moisture, meteorological parameters, and vegetation characteristics to accurately calculate water demand and generate water use requests. The water source scheduling and allocation module realizes optimal allocation and precise scheduling of water resources through a multi-objective optimization algorithm. The drip irrigation execution module accurately executes irrigation instructions to achieve efficient and water-saving irrigation. Data exchange and closed-loop control between the modules ensure the stable implementation of the system in water quality grading management, precise irrigation control, and resource utilization, providing an effective solution for slope ecological protection and sustainable use of water resources. Example 2

[0027] like Figure 1 As shown, this embodiment provides a specific step of performing slope rainwater circulation treatment in a slope rainwater circulation system based on sponge rainwater utilization, and the specific steps are: (1) Rainwater inflow and water quality monitoring Rainwater enters the system through slope confluence channels; Online multi-parameter water quality probes monitor the turbidity, pH value and conductivity of incoming rainwater in real time; (2) Water quality classification The grading treatment unit classifies rainwater according to the turbidity index: turbidity ≥ 50NTU is classified as high turbidity water quality; turbidity 20NTU≤ <50NTU is classified as medium turbidity water quality; turbidity <20NTU is classified as clean water quality; The signal transmission interface sends the generated water quality level signal to the water source scheduling and allocation module in real time; (3) Rainwater classification, storage and treatment High turbidity rainwater treatment: The first intelligent diversion valve opens, and the high turbidity rainwater flows into the primary water storage unit (sedimentation tank); Medium turbidity rainwater treatment: The second intelligent diversion valve is opened, and the medium turbidity rainwater flows into the purification and storage unit; Clean rainwater treatment: The third intelligent diversion valve opens, and the clean rainwater flows into the clean water storage unit; (4) Slope environmental data collection Soil data collection: The soil moisture sensing unit buries soil moisture sensors at different slope gradients, directions, and depths to collect soil volumetric moisture content and soil temperature in real time. Meteorological data collection: The meteorological information collection unit collects solar radiation intensity, air temperature, relative humidity, wind speed, and rainfall in real time; (5) Generate water use request instructions The water demand calculation unit calculates the actual water demand of vegetation by combining meteorological data and vegetation parameters; The instruction generation unit calculates the irrigation amount required for a single time based on the actual water demand, current soil moisture content, root depth, soil water holding capacity and rainfall; Combined with the water quality requirements corresponding to the vegetation distribution area, the corresponding water storage unit is retrieved from the multi-level water storage processing module to match the water quality level, and a water use request instruction containing the irrigation amount, water quality level and irrigation location is generated and sent to the water source scheduling and allocation module; (6) Water source scheduling and distribution The signal receiving unit receives the water quality grade signal, the water use request instruction and the liquid level data and water quality data of each water storage unit; The scheduling decision unit uses a multi-objective optimization method to calculate the optimal water supply plan based on the water quality requirements of the water request and the real-time water quality and liquid level data of each water storage unit; The execution control unit generates a control instruction based on the optimal water supply plan and sends it to the intelligent diversion valve group to adjust the opening of the flow control valve, control the water supply flow at the outlet, and deliver the water volume of the matching unit to the drip irrigation execution module; (7) Precision drip irrigation execution The drip irrigation execution module receives the water source provided by the water source scheduling and allocation module; According to the instructions of the intelligent irrigation decision module, precise drip irrigation is performed at the designated irrigation location through the drip irrigation network and drippers.

[0028] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A slope rainwater circulation system based on sponge rainwater utilization, characterized in that: The system consists of: water quality monitoring and classification module, multi-level water storage and treatment module, intelligent irrigation decision module, water source scheduling and allocation module, and drip irrigation execution module; The water quality monitoring and grading module is used to monitor the key indicators of incoming rainwater in real time through an online multi-parameter water quality probe, and generate a water quality grade signal according to a preset grading standard and send it to the water source scheduling and allocation module; The multi-stage water storage and treatment module includes independent primary water storage units, purified water storage units, and clean water storage units, which are respectively used to store rainwater of different grades and perform physical and biological treatment; The intelligent irrigation decision module obtains slope environmental data through soil data and meteorological parameters, and generates a water request instruction containing irrigation amount, water quality level and irrigation location in combination with the vegetation water demand function, and sends it to the water source scheduling and allocation module through the communication interface; The water source scheduling and allocation module is used to receive the water quality level signal and the water use request instruction, match the corresponding water storage unit in the multi-stage water storage processing module in real time according to the water quality level in the water use request, and control the intelligent valve to deliver the water volume of the matching unit to the drip irrigation execution module; The drip irrigation execution module is used to receive the water source provided by the water source scheduling and allocation module, and perform precise drip irrigation at the designated irrigation location according to the instructions of the intelligent irrigation decision module.

2. The slope rainwater circulation system based on sponge rainwater utilization according to claim 1 is characterized in that: The water quality monitoring and classification module includes: Online multi-parameter water quality probe: deployed at the entrance of the rainwater confluence channel to monitor the turbidity, pH value and conductivity of rainwater in real time; Grading processing unit: pre-stores water quality grading threshold parameters, receives probe data and executes grading logic: When the turbidity is ≥50NTU, a high turbidity water quality signal is generated; When 20NTU≤turbidity<50NTU, a medium turbidity water quality signal is generated; When the turbidity is <20NTU, a clean water quality signal is generated; Signal transmission interface: Send the generated water quality level signal to the water source scheduling and allocation module in real time.

3. The slope rainwater circulation system based on sponge rainwater utilization according to claim 1 is characterized in that: The primary water storage unit, purified water storage unit, and clean water storage unit in the multi-stage water storage and treatment module are all equipped with water inlets and outlets controlled by intelligent diversion valve groups, specifically including: The primary water storage unit is a sedimentation tank with a bottom sludge outlet. Its water inlet is connected to the rainwater confluence channel through a first intelligent diversion valve. It is used to receive rainwater corresponding to the high turbidity water quality signal generated by the water quality monitoring and grading module. Suspended solids are removed by gravity sedimentation. The upper layer of settled water is discharged through its outlet. The settled sludge at the bottom is regularly removed through the sludge outlet and used for slope ecological restoration. The purified water storage unit includes a sand filter and a biological filter connected in series. The water inlet is connected to the rainwater confluence channel through a second intelligent diversion valve, and is used to receive rainwater corresponding to the medium turbidity water quality signal generated by the water quality monitoring and grading module. The sand filter is filled with multi-layer graded filter media to further remove turbidity, colloids and organic matter. The biological filter is filled with lightweight filter media with attached microorganisms, which uses microbial metabolism to degrade dissolved organic matter. The purified water is discharged through the outlet. Clean water storage unit: It is a closed water storage tank equipped with an overflow port, a drain port and a disinfection sub-unit. The water inlet is connected to the rainwater confluence channel through a third intelligent diversion valve, and is used to receive rainwater corresponding to the clean water quality signal generated by the water quality monitoring and grading module, and can receive the effluent from the purified water storage unit after treatment to meet the standards, and disinfect the stored water. The water outlet is connected to the water supply pipeline controlled by the water source scheduling and distribution module.

4. The slope rainwater circulation system based on sponge rainwater utilization according to claim 3 is characterized in that: The first intelligent diverter valve, the second intelligent diverter valve, and the third intelligent diverter valve are controlled by the water source scheduling and distribution module, and are dynamically opened / closed according to the received water quality level signal, diverting rainwater to the corresponding water storage unit according to the water quality level signal; The primary water storage unit, purified water storage unit, and clean water storage unit are independent of each other, and the water flow paths do not interfere with each other. Each unit is equipped with a liquid level sensor to monitor the water level in real time and feed the data back to the water source scheduling and distribution module.

5. The slope rainwater circulation system based on sponge rainwater utilization according to claim 1 is characterized in that: The intelligent irrigation decision module includes a soil moisture perception unit, a meteorological information collection unit, a vegetation parameter storage unit, a water demand calculation unit, and an instruction generation unit, wherein: Soil moisture sensing unit: Soil moisture sensors are buried at different slopes, directions and depths to collect soil volumetric moisture content in real time. and soil temperature soil data; Meteorological information collection unit: collects solar radiation intensity in real time through meteorological monitoring , air temperature , relative humidity , wind speed , rainfall Meteorological parameters; Vegetation parameter storage unit: pre-stores basic parameters of different vegetation types, including potential evapotranspiration coefficient , root depth , wilting coefficient , soil water holding capacity ; Water demand calculation unit: Calculates the actual water demand of vegetation based on the data collected by the meteorological information collection unit and the vegetation parameter storage unit, combined with the vegetation water demand function ,in, is the slope of the curve of saturated water vapor pressure and temperature and , is the net radiation, with a value range of 0.2-0.3, which is used to characterize the surface's ability to reflect solar radiation. Wind speed adjustment factor , is the wind speed, is the soil heat flux, is the psychrometer constant and , is the specific heat of air at constant pressure and , is atmospheric pressure, is the latent heat of vaporization, is the saturated vapor pressure and , is the actual water vapor pressure and ; Instruction generation unit: based on the actual water demand calculated , current soil moisture content , root depth and soil water holding capacity ,use Calculate the irrigation volume required for a single irrigation , combined with the water quality requirements corresponding to the vegetation distribution area, the corresponding water storage unit is called from the multi-level water storage processing module to match the water quality level, and a water use request instruction including irrigation amount, water quality level and irrigation location is generated.

6. The slope rainwater circulation system based on sponge rainwater utilization according to claim 1 is characterized in that: The water source scheduling and allocation module includes: Signal receiving unit: Receives the water quality grade signal sent by the water quality monitoring and grading module and the water use request instruction sent by the intelligent irrigation decision module. The water use request instruction includes the required water quality grade, irrigation amount and irrigation location information. At the same time, it obtains the liquid level data and water quality data of each water storage unit in the multi-stage water storage and processing module in real time. The water quality data includes indicators of turbidity, pH value and conductivity; Scheduling decision unit: Based on the water quality requirements in the water request instruction and combined with the real-time water quality data and liquid level data of each water storage unit, a multi-objective optimization is used to calculate the optimal water supply plan; Execution control unit: Based on the optimal water supply plan, generate control instructions and send them to the intelligent diversion valve group, the intelligent diversion valve group includes a first intelligent diversion valve, a second intelligent diversion valve, and a third intelligent diversion valve, which controls the water supply flow of the outlet by adjusting the opening of the flow regulating valve.

7. The slope rainwater circulation system based on sponge rainwater utilization according to claim 6 is characterized in that: The multi-objective optimization in the scheduling decision unit is to construct an objective function to minimize energy consumption, maximize water resource utilization, and meet irrigation demand, and calculate the optimal water supply plan, where: The objective function for minimizing energy consumption is: ,in, is the number of water storage units involved in water supply, For the The energy consumption coefficient of each water storage unit, For the The water supply of each water storage unit, For the The water level difference from the water storage unit to the irrigation location, Reaction energy consumption; The objective function of maximizing water resource utilization is: ,in, For the The water quality matching weight of each water storage unit is in the range of 0-1. For the The amount of water wasted due to water quality mismatch and excessive water supply in each water storage unit, is the total water supply of the system, Reflects water resource utilization rate; The objective function for meeting irrigation demand is: ,in, is the total irrigation volume required by the intelligent irrigation decision module, is the sum of the actual water supply of each water storage unit, Reflects the deviation between the total water supply and demand.

8. The slope rainwater circulation system based on sponge rainwater utilization according to claim 7 is characterized in that: The scheduling decision unit uses linear weighting to transform the objective function constructed by multiple objectives into a single-objective optimization problem, namely: in, 、 、 is the weight coefficient and ; The constraints are: Water quality matching constraint: Water quality level of each water storage unit satisfy ,in The water quality level requested for water use, including high turbidity, medium turbidity, and clean water; Water Constraints: ,in For the Real-time available water volume of each water storage unit; Pipeline transportation constraints: ,in It is the maximum delivery flow of the water supply pipeline.

9. The slope rainwater circulation system based on sponge rainwater utilization according to claim 1 is characterized in that: The drip irrigation execution module includes: Water source receiving unit: connected to the water supply pipeline controlled by the water source scheduling and distribution module, receives the water source delivered by the water source scheduling and distribution module, and performs preliminary monitoring of the flow and pressure of the water source; Irrigation control unit: Receives water use request instructions sent by the intelligent irrigation decision module, and irrigates the target area in combination with the optimal water supply plan of the water source scheduling and allocation module.

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