Real-time hydrological information automatic monitoring and disaster early warning alarm system

Abstract

A real-time hydrological information automatic monitoring and disaster early warning alarm system relates to the technical field of hydrological monitoring, enables managers to comprehensively understand hydrological characteristics, stability and ecological health conditions of a river channel through automatic monitoring, and is beneficial to optimization of scheduling and configuration of water resources. For example, when it is known that the ecological health condition of a certain sub-riverway area is poor and related to the water flow condition, scientific management and efficient utilization of water resources can be achieved by reasonably adjusting the operation mode of a water conservancy project, guaranteeing the ecological water use requirement and giving consideration to other water use functions such as flood prevention and irrigation; through long-term accumulation of various data and analysis and comparison of conditions of different regions and different time periods, powerful data support can be provided for making a more macroscopic water resource protection and utilization plan, and continuous improvement of regional water resource management level is promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrological monitoring, and in particular relates to a real-time hydrological information automatic monitoring and disaster early warning alarm system. Background Art

[0002] The river ecosystem is an important part of the ecological environment. It not only provides a habitat for many aquatic organisms, but also plays a key role in maintaining biodiversity, regulating climate, and purifying water quality. A healthy river ecosystem can promote the sustainable development of fisheries and provide ecological service value to surrounding areas. For example, aquatic plants in rivers can absorb nutrients in the water and purify the water quality; the migration of fish also helps to maintain ecological balance. Therefore, a real-time automatic monitoring system for hydrological information and disaster early warning and alarm is needed.

[0003] Prior art, such as the invention application patent with announcement number: CN118607922A, discloses a data acquisition and management system for hydrological monitoring. The present invention obtains relevant geographic data and establishes a HEC RAS ​​model of the current river hydrological area. At the same time, relevant parameters of the river hydrological area are collected and analyzed to obtain an estimated risk assessment index and a river ecological assessment index, thereby reflecting the flood hazards and water quality status of the current river hydrological area. The estimated risk assessment index or the river ecological assessment index is matched to obtain the water level risk level and water quality abnormality level of the target river hydrological area corresponding to the current monitoring time point. Subsequently, the estimated risk assessment index or river ecological assessment index of the target river hydrological area corresponding to each monitoring time point and the generated related levels are integrated into the established HEC RAS ​​model for updating, thereby realizing intelligent analysis of the collected data, and updating the established HEC RAS ​​model based on the results of each data analysis, thereby improving the accuracy of the prediction.

[0004] With respect to the above solution, the inventor of the present application found that the above technology has at least the following technical problems: 1. Existing technologies lack systematic monitoring and analysis of small-scale hydrological data, such as turbulent structure data, water vortex motion data, and riverbank seepage data, making it difficult to fully understand the water flow movement characteristics within the river and the seepage conditions on the riverbank. This leads to a lack of sufficient basis for the assessment of river stability, and the inability to accurately identify potential safety hazards. There is no scientific assessment model based on comprehensive multi-factor analysis, and it is difficult to accurately quantify the impact of various factors on river stability. This may lead to an overly subjective or one-sided assessment of river stability, and an inability to provide reliable support for decisions such as flood control and disaster reduction.

[0005] 2. Existing technologies may only be able to make simple threshold warnings based on single conventional data such as water level and rainfall. They cannot comprehensively consider the interaction of multiple hydrological factors and the actual stability of the river, and are prone to false alarms or missed alarms, reducing the credibility and effectiveness of warning information. Due to untimely and inaccurate data monitoring and analysis, it is difficult to detect abnormal changes in river stability in a timely manner, and thus it is impossible to issue warning signals as early as possible before hydrological disasters occur, making it impossible for relevant departments and personnel to make preparations for prevention and response in advance, increasing the losses caused by disasters. There is a lack of refined warning level division based on the specific values ​​of river stability, and it is impossible to provide corresponding and targeted response measures for different levels of disaster risks, resulting in unreasonable resource allocation in the disaster response process, affecting the efficiency of emergency rescue.

[0006] 3. Existing technologies do not pay enough attention to the monitoring of ecological indicators such as aquatic plant change data and fish migration change data, or lack effective monitoring methods. It is impossible to fully understand the health status of river ecosystems and it is difficult to timely discover threats and damage to ecosystems. A complete ecological health assessment system based on comprehensive analysis of multiple ecological indicators has not been established. It is impossible to accurately quantify the ecological health level and it is difficult to scientifically compare and evaluate the ecological health status of different regions, which is not conducive to the formulation of targeted ecological protection and restoration strategies. At the same time, there is no clear definition of the responsibilities and tasks of various departments in hydrological disaster warning and ecological protection, and there is a lack of effective collaborative work mechanisms and emergency linkage plans. When facing disasters and ecological problems, it is easy for departments to have inconsistent coordination and inconsistent actions, and it is impossible to form a strong joint force to deal with disasters and protect the ecology. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a real-time automatic monitoring system for hydrological information and a disaster early warning alarm system. Through the long-term accumulation of various types of data and the analysis and comparison of conditions in different regions and different time periods, it can also provide strong data support for the formulation of more macro water resource protection and utilization plans, and promote the continuous improvement of regional water resource management levels.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: A real-time hydrological information automatic monitoring and disaster early warning alarm system: including: River area division unit: used to divide the hydrological characteristics of the river in the target area into regions, thereby dividing the sub-river areas in the river in the target area, and then evaluating the river stability corresponding to the river in the target area.

[0009] Hydrological disaster warning unit: used to warn of hydrological disasters in the target area when the river stability corresponding to the target area river is abnormal.

[0010] Ecological health assessment unit: used to assess the ecological health level of each sub-river area in the target area river when the hydrological disaster warning corresponding to the target area river reaches the first-level hydrological disaster warning, and issue early warning prompts.

[0011] Preferably, the river area division unit also includes a small-scale hydrological data acquisition module and a small-scale hydrological data analysis module.

[0012] The small-scale hydrological data acquisition module is used to obtain turbulent structure data, water vortex motion data and riverbank seepage data corresponding to each sub-river channel area in the target area river channel. The turbulent structure data includes Reynolds number and turbulence intensity. The water vortex motion data includes vortex frequency, axial velocity and tangential velocity corresponding to each vortex. The riverbank seepage data includes seepage velocity, seepage amount and groundwater level change rate.

[0013] The small-scale hydrological data analysis module is used to analyze the turbulence structure data, water flow vortex motion data and riverbank seepage data corresponding to each sub-channel area in the river channel of the target area to obtain the turbulence structure evaluation value, water flow vortex motion evaluation value and riverbank seepage evaluation value corresponding to each sub-channel area in the river channel of the target area.

[0014] Preferably, the analysis obtains the turbulence structure assessment value, water vortex motion assessment value and riverbank seepage assessment value corresponding to each sub-channel area in the river channel of the target area. The specific analysis process is as follows: A1. The Reynolds number and turbulence intensity corresponding to each sub-channel area in the river channel of the target area are input into the turbulence structure assessment value evaluation model, and the turbulence structure assessment value corresponding to each sub-channel area in the river channel of the target area is output.

[0015] A2. Input the vortex frequency corresponding to each sub-channel area in the target area river, the axial velocity and the tangential velocity corresponding to each vortex into the turbulent structure assessment value evaluation model, and output the water flow vortex motion evaluation value corresponding to each sub-channel area in the target area river.

[0016] A3. Input the seepage velocity, seepage volume and groundwater level change rate corresponding to each sub-channel area in the target area river into the river bank seepage assessment model, and output the river bank seepage assessment value corresponding to each sub-channel area in the target area river.

[0017] Preferably, the river stability corresponding to the river channel in the target area is evaluated, and the specific evaluation process is as follows: B1, the turbulence structure evaluation value, water vortex motion evaluation value and riverbank seepage evaluation value corresponding to each sub-channel area in the river channel in the target area are input into the river stability evaluation model, and the river stability value result corresponding to the river channel in the target area is output.

[0018] B2. The river stability value results include values ​​of 1 and -1. When the river stability value result corresponding to the river channel in the target area is 1, it indicates that the river stability corresponding to the river channel in the target area is normal. Conversely, when the river stability value result corresponding to the river channel in the target area is -1, it indicates that the river stability corresponding to the river channel in the target area is abnormal. In this way, the river stability corresponding to the river channel in the target area is evaluated.

[0019] Preferably, the expression of the river stability assessment model is: , In the formula, , and They are respectively represented as the turbulence structure assessment value, water vortex motion assessment value and riverbank seepage assessment value corresponding to the yth sub-channel area in the river channel of the target area. y represents the number corresponding to each sub-channel area. , is any integer greater than 2, It indicates the river stability value result corresponding to the river in the target area. is the set river stability value threshold, where , , They are the standard turbulence structure assessment value, standard water vortex motion assessment value, and standard river bank seepage assessment value corresponding to the set sub-river channel area. , , They are the weight factors corresponding to the turbulent structure assessment value of the sub-channel area, the weight factors corresponding to the vortex motion assessment value of the water flow, and the weight factors corresponding to the river bank seepage assessment value. , , They are the adjustment factors corresponding to the turbulence structure assessment value of the sub-channel area, the adjustment factors corresponding to the vortex motion assessment value of the water flow, and the adjustment factors corresponding to the river bank seepage assessment value. Represents a natural constant.

[0020] Preferably, when the river stability corresponding to the river channel in the target area is abnormal, a hydrological disaster warning is issued for the river channel in the target area. The specific warning process is as follows: C1. When the river stability corresponding to the river channel in the target area is abnormal, if the river stability value corresponding to the river channel in the target area does not exceed 10% of the set river stability value threshold, the river channel in the target area is marked as a "level three hydrological disaster warning". At this time, the warning prompt information is pushed to grassroots water conservancy patrol personnel and small-scale community management departments along the coast, the frequency of daily patrols is increased, and 1-2 additional river bank inspections are arranged every day.

[0021] C2. When the river stability corresponding to the river channel in the target area is abnormal, if the river stability value corresponding to the river channel in the target area does not exceed 10% of the set river stability value threshold, the river channel in the target area will be marked as a "secondary hydrological disaster warning", and the warning information will be immediately conveyed to the emergency response team of the local water conservancy department, the management departments of small-scale communities along the coast, and the street offices with a large number of residents along the coast. Professional measuring equipment will be dispatched to review the seepage velocity at key points on the river bank, and drones will be used to take aerial photos of the water vortex conditions at key bends. At the same time, low-lying areas around the river bank will be evacuated and temporary resettlement preparations will be made.

[0022] C3. When the river stability corresponding to the river channel in the target area is abnormal, if the river stability value corresponding to the river channel in the target area does not exceed 10% of the set river stability value threshold, the river channel in the target area will be marked as a "level one hydrological disaster warning", and the alarm will be sounded immediately. The warning information will be pushed through multiple channels to the key departments and institutions of the city and county-level emergency command centers, fire rescue teams, and large-scale water conservancy hub management units. At the same time, the assessment process for the ecological health level corresponding to each sub-river area in the river channel in the target area will be initiated.

[0023] Preferably, the ecological health assessment unit further includes an ecological health data acquisition module and an ecological health assessment value analysis module.

[0024] The ecological health data acquisition module is used to obtain aquatic plant change data and fish migration change data corresponding to each sub-river area in the target area river. The aquatic plant change data includes the change rate of aquatic plant coverage and the change amount of water-passing cross-sectional area. The fish migration change data includes the change rate of fish migration speed and the coefficient of variation of fish residence time distribution.

[0025] The ecological health assessment value analysis module is used to analyze the aquatic plant change data and fish migration change data corresponding to each sub-river channel area in the river channel of the target area, so as to obtain the aquatic plant assessment value and fish migration assessment value corresponding to each sub-river channel area in the river channel of the target area, and then analyze the ecological health assessment value corresponding to each sub-river channel area in the river channel of the target area.

[0026] Preferably, the analysis obtains the aquatic plant assessment value and fish migration assessment value corresponding to each sub-channel area in the river of the target area. The specific analysis process is as follows: D1. The aquatic plant coverage change rate and the water-passing cross-sectional area change corresponding to each sub-channel area in the river of the target area are input into the aquatic plant assessment value evaluation model, and the aquatic plant assessment value corresponding to each sub-channel area in the river of the target area is output.

[0027] D2. Input the fish migration speed change rate and fish residence time distribution variation coefficient corresponding to each sub-channel area in the target area river into the fish migration assessment value evaluation model, and output the fish migration assessment value corresponding to each sub-channel area in the target area river.

[0028] Preferably, the ecological health assessment value corresponding to each sub-channel area in the target area river is analyzed, and the specific analysis process is as follows: the aquatic plant assessment value and fish migration assessment value corresponding to each sub-channel area in the target area river are recorded as and , substitute into the calculation formula: middle, Obtain the ecological health assessment value corresponding to each sub-river area in the target area river ,in, and They are respectively represented as the aquatic plant assessment value and fish migration assessment value corresponding to the yth sub-river area in the target area. , They are the standard aquatic plant assessment value and standard fish migration assessment value corresponding to the set sub-river area. , They are respectively the weight factors corresponding to the aquatic plant assessment value of the set sub-river area and the weight factors corresponding to the fish migration assessment value.

[0029] Preferably, the ecological health level corresponding to each sub-channel area in the river of the target area is evaluated, and the specific evaluation process is as follows: E1. Compare the ecological health assessment value corresponding to each sub-channel area in the river of the target area with the ecological health assessment value interval corresponding to each ecological health level in the database. If the ecological health assessment value corresponding to a sub-channel area in the river of the target area is within the ecological health assessment value interval corresponding to a certain ecological health level in the database, then the ecological health level in the database is used as the ecological health level corresponding to the sub-channel area in the river of the target area.

[0030] E2. If the ecological health level of the sub-river area in the target area is "low ecological health level", the emergency warning mechanism will be automatically triggered, and an electronic alarm will be sent to the ecological environment department, water conservancy authority, and local emergency management agency as soon as possible. The SMS group function will be used to push warning SMS messages to the heads of coastal communities, fishery farmers, and heads of nearby factories and enterprises to inform them that the river ecology in their area has deteriorated to the "low ecological health level". Inter-departmental seminars will be organized to jointly formulate a river ecological restoration plan, clarify the responsibilities and task nodes of each department, and ensure that the restoration work is carried out in an orderly manner.

[0031] E3. If the ecological health level of the sub-river area in the target area is "medium ecological health level", push the ecological health monitoring report to the ecological protection department and water conservancy research institutions, encourage fishermen to participate in aquatic biological reproduction and release activities, release local dominant fish seedlings, help restore fishery resources, and release river ecological "medium ecological health level" warning information through local media, community bulletin boards, and social media platforms to popularize ecological protection knowledge and call on the public to reduce the discarding of garbage and discharge of sewage into the river.

[0032] E4. If the ecological health level of the sub-river area in the target area is "high ecological health level", increase the monitoring frequency of the sub-river area, increase the number of biodiversity monitoring points, capture subtle changes in the ecosystem in an all-round and real-time manner, build a data sharing cloud platform, open the latest ecological data to all relevant departments, organize science popularization activities in schools and communities, and publicize the significance and value of the high ecological health level of the river.

[0033] The present invention can achieve the following beneficial effects: 1. The present invention can accurately identify the state of river stability by carefully dividing the river channel in the target area and obtaining small-scale hydrological data, and analyzing the turbulent structure, water vortex motion and riverbank seepage of each sub-river channel area based on a rigorous evaluation model. This scientific evaluation method makes the early warning of hydrological disasters no longer a general judgment, but can specifically distinguish different degrees of risks, and divide it into three-level, two-level and one-level hydrological disaster early warnings, so that relevant departments and personnel can take targeted and step-by-step response measures according to different early warning levels, improve response efficiency, effectively prevent the occurrence of disasters or reduce the losses caused by disasters, and at the same time, at different early warning levels, the early warning information will be pushed to the corresponding key departments and institutions, from grassroots patrol personnel to municipal and county-level emergency command centers, fire rescue teams, large-scale water conservancy hub management units, etc., forming a complete set of multi-department collaborative response chains. This breaks the previous situation of unsmooth information and uncoordinated actions between departments, ensuring that when facing hydrological disasters, all parties can respond quickly, perform their duties, integrate resources for efficient disaster prevention and control and emergency disposal, and enhance the comprehensive ability of the entire region to respond to hydrological disasters.

[0034] 2. The ecological health assessment unit of the present invention collects key ecological indicators such as aquatic plant change data and fish migration change data through a special data acquisition unit, and uses the corresponding assessment model for quantitative analysis, and finally obtains the ecological health assessment value corresponding to each sub-river area, and then determines the ecological health level. This comprehensive and quantitative assessment method changes the limitations of relying on experience or qualitative judgment of ecological health status in the past, can more accurately reflect the real state changes of the ecosystem, and provides a reliable basis for the scientific formulation of ecological protection strategies. Differentiated early warning prompts and response measures are implemented according to different ecological health levels (low, medium, and high), which can not only enable ecological protection departments, water conservancy research institutions and other professional forces to exert their efforts accurately, such as quickly organizing cross-departmental discussions to formulate restoration plans at "low ecological health levels", but also widely guide the public to participate in ecological protection. At the "medium ecological health level", through media publicity, calling on the public to reduce pollution emissions, etc., and at the "high ecological health level", popular science activities are carried out to enhance the public's awareness of ecological protection, creating a good atmosphere for the whole society to pay attention to and protect the river ecology together, which is conducive to the sustainable development of the ecosystem.

[0035] 3. The present invention enables managers to have a comprehensive understanding of the hydrological characteristics, stability and ecological health of the river through automatic monitoring, which helps to optimize the scheduling and allocation of water resources. For example, when it is known that the ecological health of a sub-river area is not good and is related to the water flow, the operation mode of the water conservancy project can be reasonably adjusted to ensure the ecological water demand, while taking into account other water use functions such as flood control and irrigation, so as to achieve scientific management and efficient utilization of water resources. Through the long-term accumulation of various data and the analysis and comparison of conditions in different regions and different time periods, it can also provide strong data support for the formulation of more macro water resource protection and utilization plans, and promote the continuous improvement of regional water resource management level. At the same time, the system's full range of functions from hydrological disaster warning to ecological health assessment covers the comprehensive consideration of the physical form and ecological environment of the river, and can timely discover and respond to various adverse factors affecting the river ecosystem, whether it is riverbank erosion caused by abnormal water flow or ecological imbalance caused by the deterioration of the biological living environment. Effective early warning, response and restoration measures will help maintain the integrity of the river ecosystem structure and function, ensure its long-term stability, and thereby maintain the health of the entire river basin ecosystem, and give full play to its important ecological service functions in water conservation, climate regulation, biodiversity protection and other aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is a system structure diagram of the present invention. DETAILED DESCRIPTION

[0037] The preferred solution is Figure 1 As shown, a real-time hydrological information automatic monitoring and disaster early warning alarm system includes: a river area division unit, a hydrological disaster early warning unit, an ecological health assessment unit and a database.

[0038] The hydrological disaster early warning unit is connected to the river area division unit and the ecological health assessment unit respectively, and the ecological health assessment unit is also connected to the database.

[0039] River area division unit: used to divide the hydrological characteristics of the river in the target area into regions, thereby dividing the sub-river areas in the river in the target area, and then evaluating the river stability corresponding to the river in the target area.

[0040] In a specific embodiment, the river area division unit also includes a small-scale hydrological data acquisition module and a small-scale hydrological data analysis module.

[0041] The small-scale hydrological data acquisition module is used to obtain turbulent structure data, water vortex motion data and riverbank seepage data corresponding to each sub-river channel area in the target area river channel. The turbulent structure data includes Reynolds number and turbulence intensity. The water vortex motion data includes vortex frequency, axial velocity and tangential velocity corresponding to each vortex. The riverbank seepage data includes seepage velocity, seepage amount and groundwater level change rate.

[0042] Furthermore, a propeller flow meter is used and placed at measuring points of different depths and positions in each sub-channel area of ​​the river in the target area. The water flow drives the propeller to rotate, and the flow velocity at each point is obtained based on the relationship between the propeller rotation speed and the water flow velocity. Then, these flow velocity data are averaged to obtain the average flow velocity of the cross section. The shape and size of the cross section of the river are measured using a depth sounder combined with GPS positioning. The cross-sectional area of ​​the water is first calculated: based on the cross-sectional shape, such as a rectangle is length multiplied by width, and a trapezoid is based on the trapezoid area formula. The wetted perimeter is then calculated: the length of contact between the water body and the solid boundary on the cross-sectional area. Finally, the hydraulic radius is calculated using the hydraulic radius calculation formula: hydraulic radius = cross-sectional area of ​​water / wetted perimeter. The hydraulic radius is obtained, the water temperature is measured on site, and then the corresponding water temperature is found based on the water physical properties table. Kinematic viscosity, take the average flow velocity of the cross section as the characteristic velocity, the hydraulic radius as the characteristic length, and the corresponding kinematic viscosity as the Reynolds number calculation formula: Reynolds number = characteristic velocity × characteristic length / kinematic viscosity, and get the Reynolds number. Use a propeller flowmeter or acoustic Doppler flowmeter to measure the flow velocity and take the average value. Use a hot wire anemometer, which obtains the flow velocity by measuring the heat loss when the fluid flows through the hot wire. It is sensitive to the pulsation of the flow velocity and can be used to measure the instantaneous velocity in turbulence. Square the turbulent pulsation velocity and find the average value. Then take the square root to get the root mean square of the turbulent pulsation velocity. Finally, divide the root mean square of the turbulent pulsation velocity by the average flow velocity. According to the turbulence intensity calculation formula: turbulence intensity = root mean square of turbulent pulsation velocity / average flow velocity, get the turbulence intensity.

[0043] Furthermore, tracer particles are placed in each sub-channel area of ​​the river in the target area, the measurement plane is illuminated by laser, and the moving image of the particles is recorded with a high-speed camera. The displacement of the particles is obtained by cross-correlation analysis of two adjacent frames of images, and then the velocity field is calculated. By observing the changes in the velocity field, the generation and disappearance of vortices are identified, and the vortex frequency is determined by counting the number of vortexes that appear per unit time. After the vortex is identified, the velocity field data obtained by PIV technology is used to establish a local coordinate system in the vortex area. The velocity component along the axis of the vortex is the axial velocity, and the circumferential velocity component perpendicular to the axis is the tangential velocity.

[0044] Furthermore, a constant head permeameter was used to measure the amount of water passing through the soil sample per unit time. According to Darcy's law: seepage velocity = permeability coefficient × hydraulic gradient, since the hydraulic gradient was known at this time, several observation wells were drilled near the river bank and pumping tests were carried out. By observing the changes in water level and the amount of water pumped during the pumping process, the permeability coefficient is back-calculated using the Theis formula, and groundwater level observation wells are set up at different locations on the river bank. The water level of each observation well is measured with a level meter, and the water level difference is calculated: the water level of the previous observation well is subtracted from the water level of the latter observation well, and then the distance between the two points is measured. The hydraulic gradient is calculated according to the hydraulic gradient formula: Hydraulic gradient = water level difference / distance: to obtain the hydraulic gradient, and the seepage velocity and the water-passing cross-sectional area are substituted into the seepage flow calculation formula: Seepage flow = seepage velocity × water-passing cross-sectional area to obtain the seepage flow. Multiple water level observation wells are set up in the river bank area, and water level meters such as pressure level gauges or ultrasonic level gauges are used to measure the groundwater level regularly, such as every hour, every day, etc. The water level data of each measurement is recorded, and the water level change is obtained by subtracting the water level of the previous measurement from the water level of the latter measurement, and then divided by the time interval between the two measurements. The groundwater level change rate is calculated according to the groundwater level change rate formula: Groundwater level change rate = water level change / time interval to obtain the groundwater level change rate.

[0045] The small-scale hydrological data analysis module is used to analyze the turbulence structure data, water flow vortex motion data and riverbank seepage data corresponding to each sub-channel area in the river channel of the target area to obtain the turbulence structure evaluation value, water flow vortex motion evaluation value and riverbank seepage evaluation value corresponding to each sub-channel area in the river channel of the target area.

[0046] In another specific embodiment, the analysis obtains the turbulence structure evaluation value, water vortex motion evaluation value and riverbank seepage evaluation value corresponding to each sub-channel area in the river channel of the target area. The specific analysis process is as follows: A1. The Reynolds number and turbulence intensity corresponding to each sub-channel area in the river channel of the target area are input into the turbulence structure evaluation value evaluation model, and the turbulence structure evaluation value corresponding to each sub-channel area in the river channel of the target area is output.

[0047] Furthermore, the analysis process of the turbulence structure evaluation value corresponding to each sub-channel area in the target area river is as follows: the Reynolds number and turbulence intensity corresponding to each sub-channel area in the target area river are normalized, and the Reynolds number and turbulence intensity corresponding to each sub-channel area in the target area river are recorded as and , substitute into the analysis formula , and obtain the turbulence structure assessment value corresponding to each sub-channel area in the target area river , , They are the weight factor corresponding to the Reynolds number of the set sub-channel area and the weight factor corresponding to the turbulence intensity.

[0048] in, , Both are greater than 0 and less than 1.

[0049] Furthermore, based on the expertise and research of experts in the field, and after discussion and confirmation with industry organizations or professional institutions, experts set weight factors corresponding to the Reynolds number of the sub-channel area and weight factors corresponding to the turbulence intensity based on their own experience and knowledge.

[0050] A2. Input the vortex frequency corresponding to each sub-channel area in the target area river, the axial velocity and the tangential velocity corresponding to each vortex into the turbulent structure assessment value evaluation model, and output the water flow vortex motion evaluation value corresponding to each sub-channel area in the target area river.

[0051] It should be noted that the water vortex motion evaluation value corresponding to each sub-channel area in the river channel of the target area is obtained by analyzing the turbulent structure evaluation value corresponding to each sub-channel area in the river channel of the target area according to the above-mentioned analysis process.

[0052] A3. Input the seepage velocity, seepage volume and groundwater level change rate corresponding to each sub-channel area in the target area river into the river bank seepage assessment model, and output the river bank seepage assessment value corresponding to each sub-channel area in the target area river.

[0053] Furthermore, the riverbank seepage assessment value corresponding to each sub-channel area in the river channel of the target area is obtained by analyzing the turbulent structure assessment value corresponding to each sub-channel area in the river channel of the target area according to the above-mentioned analysis process.

[0054] In another specific embodiment, the river stability corresponding to the river channel in the target area is evaluated, and the specific evaluation process is as follows: B1. The turbulent structure evaluation value, water vortex motion evaluation value and riverbank seepage evaluation value corresponding to each sub-channel area in the river channel in the target area are input into the river stability evaluation model, and the river stability value result corresponding to the river channel in the target area is output.

[0055] B2. The river stability value results include values ​​of 1 and -1. When the river stability value result corresponding to the river channel in the target area is 1, it indicates that the river stability corresponding to the river channel in the target area is normal. Conversely, when the river stability value result corresponding to the river channel in the target area is -1, it indicates that the river stability corresponding to the river channel in the target area is abnormal. In this way, the river stability corresponding to the river channel in the target area is evaluated.

[0056] In another specific embodiment, the expression of the river stability assessment model is: , In the formula, , and They are respectively represented as the turbulence structure assessment value, water vortex motion assessment value and riverbank seepage assessment value corresponding to the yth sub-channel area in the river channel of the target area. y represents the number corresponding to each sub-channel area. , is any integer greater than 2, It indicates the river stability value result corresponding to the river in the target area. is the set river stability value threshold, where , , They are the standard turbulence structure assessment value, standard water vortex motion assessment value, and standard river bank seepage assessment value corresponding to the set sub-river channel area. , , They are the weight factors corresponding to the turbulent structure assessment value of the sub-channel area, the weight factors corresponding to the vortex motion assessment value of the water flow, and the weight factors corresponding to the river bank seepage assessment value. , , They are the adjustment factors corresponding to the turbulence structure assessment value of the sub-channel area, the adjustment factors corresponding to the vortex motion assessment value of the water flow, and the adjustment factors corresponding to the river bank seepage assessment value. Represents a natural constant.

[0057] in, , , Both are greater than 0 and less than 1.

[0058] Furthermore, through the summary of a large amount of research data and experimental data, the standard turbulence structure assessment value, standard water vortex motion assessment value, and standard riverbank seepage assessment value corresponding to the sub-channel area are set according to professional institutions and research institutions. At the same time, based on the professional knowledge and research basis of experts in the field, they are discussed and confirmed with industry organizations or professional institutions. Experts set the weight factors corresponding to the turbulence structure assessment value of the sub-channel area, the weight factors corresponding to the water vortex motion assessment value, and the weight factors corresponding to the riverbank seepage assessment value according to their own experience and knowledge, and set the adjustment factors corresponding to the turbulence structure assessment value of the sub-channel area, the adjustment factors corresponding to the water vortex motion assessment value, and the adjustment factors corresponding to the riverbank seepage assessment value.

[0059] Hydrological disaster warning unit: used to warn of hydrological disasters in the target area when the river stability corresponding to the target area river is abnormal.

[0060] In a specific embodiment, when the river stability corresponding to the river channel in the target area is abnormal, a hydrological disaster warning is issued for the river channel in the target area. The specific warning process is as follows: C1. When the river stability corresponding to the river channel in the target area is abnormal, if the river stability value corresponding to the river channel in the target area does not exceed 10% of the set river stability value threshold, the river channel in the target area is marked as a "level 3 hydrological disaster warning". At this time, the warning prompt information is pushed to grassroots water conservancy patrol personnel and small-scale community management departments along the coast, the frequency of daily patrols is increased, and 1-2 additional river bank inspections are arranged every day.

[0061] C2. When the river stability corresponding to the river channel in the target area is abnormal, if the river stability value corresponding to the river channel in the target area does not exceed 10% of the set river stability value threshold, the river channel in the target area will be marked as a "secondary hydrological disaster warning", and the warning information will be immediately conveyed to the emergency response team of the local water conservancy department, the management departments of small-scale communities along the coast, and the street offices with a large number of residents along the coast. Professional measuring equipment will be dispatched to review the seepage velocity at key points on the river bank, and drones will be used to take aerial photos of the water vortex conditions at key bends. At the same time, low-lying areas around the river bank will be evacuated and temporary resettlement preparations will be made.

[0062] C3. When the river stability corresponding to the river channel in the target area is abnormal, if the river stability value corresponding to the river channel in the target area does not exceed 10% of the set river stability value threshold, the river channel in the target area will be marked as a "level one hydrological disaster warning", and the alarm will be sounded immediately. The warning information will be pushed through multiple channels to the key departments and institutions of the city and county-level emergency command centers, fire rescue teams, and large-scale water conservancy hub management units. At the same time, the assessment process for the ecological health level corresponding to each sub-river area in the river channel in the target area will be initiated.

[0063] In the embodiment of the present invention, by dividing the river channel in the target area into detailed regions and obtaining small-scale hydrological data, and analyzing the turbulent structure, water vortex motion and riverbank seepage of each sub-channel area based on a rigorous evaluation model, the state of river stability can be accurately identified. This scientific evaluation method makes the early warning of hydrological disasters no longer a general judgment, but can specifically distinguish different degrees of risks, and divide it into three-level, two-level and one-level hydrological disaster early warnings, so that relevant departments and personnel can take targeted and step-by-step response measures according to different early warning levels, improve response efficiency, effectively prevent the occurrence of disasters or reduce the losses caused by disasters, and at the same time, at different early warning levels, the early warning information will be pushed to the corresponding key departments and institutions, from grassroots patrol personnel to municipal and county-level emergency command centers, fire rescue teams, large-scale water conservancy hub management units, etc., forming a complete multi-department collaborative response chain. This breaks the previous situation of unsmooth information and uncoordinated actions between departments, ensuring that when facing hydrological disasters, all parties can respond quickly, perform their duties, integrate resources for efficient disaster prevention and control and emergency disposal, and enhance the comprehensive ability of the entire region to respond to hydrological disasters.

[0064] Ecological health assessment unit: used to assess the ecological health level of each sub-river area in the target area river when the hydrological disaster warning corresponding to the target area river reaches the first-level hydrological disaster warning, and issue early warning prompts.

[0065] In a specific embodiment, the ecological health assessment unit further includes an ecological health data acquisition module and an ecological health assessment value analysis module.

[0066] The ecological health data acquisition module is used to obtain aquatic plant change data and fish migration change data corresponding to each sub-river area in the target area river. The aquatic plant change data includes the change rate of aquatic plant coverage and the change amount of water-passing cross-sectional area. The fish migration change data includes the change rate of fish migration speed and the coefficient of variation of fish residence time distribution.

[0067] Furthermore, the change rate of aquatic plant coverage = (late coverage - early coverage) / early coverage × 100%. The coverage can be obtained by dividing the coverage area obtained by remote sensing image interpretation by the total monitoring area, or by dividing the plant coverage area in the sample plot by the sample plot area in the field survey. A water level station is set up near the river to record water level changes. Combined with the previous cross-sectional topographic measurement data, when the water level changes, by calculating the cross-sectional area under different water levels, the change in the cross-sectional area = the cross-sectional area of ​​the later water flow - the cross-sectional area of ​​the earlier water flow.

[0068] Furthermore, underwater video cameras are set up in key migration channels to record the migration process of fish through video. Image analysis software is used to identify and track the positions of fish in continuous frame images, and the distance moved by fish in unit time is calculated to determine the migration speed. Monitoring is carried out in different time periods to obtain speed data under different conditions. The rate of change of fish migration speed = (late speed-early speed) / early speed × 100%. Fish tags with time recording functions, such as radio tags or satellite tags, are used to directly obtain the time data of fish staying in the sub-channel and obtain the coefficient of variation of fish residence time distribution.

[0069] The ecological health assessment value analysis module is used to analyze the aquatic plant change data and fish migration change data corresponding to each sub-river channel area in the river channel of the target area, so as to obtain the aquatic plant assessment value and fish migration assessment value corresponding to each sub-river channel area in the river channel of the target area, and then analyze the ecological health assessment value corresponding to each sub-river channel area in the river channel of the target area.

[0070] In another specific embodiment, the analysis obtains the aquatic plant assessment value and fish migration assessment value corresponding to each sub-channel area in the river of the target area. The specific analysis process is as follows: D1. The aquatic plant coverage change rate and the water-passing cross-sectional area change corresponding to each sub-channel area in the river of the target area are input into the aquatic plant assessment value evaluation model, and the aquatic plant assessment value corresponding to each sub-channel area in the river of the target area is output.

[0071] Furthermore, the analysis process of the aquatic plant assessment value corresponding to each sub-channel area in the target area river is as follows: the aquatic plant coverage change rate and water flow cross-sectional area change corresponding to each sub-channel area in the target area river are normalized, and the aquatic plant coverage change rate and water flow cross-sectional area change corresponding to each sub-channel area in the target area river are recorded as and , Substitute into the analysis formula , and obtain the corresponding aquatic plant assessment value of each sub-river area in the target area river , , They are respectively the weight factor corresponding to the change rate of aquatic plant coverage corresponding to the set sub-river area and the weight factor corresponding to the change in the water-passing cross-sectional area.

[0072] in, , Both are greater than 0 and less than 1.

[0073] Furthermore, based on the expertise and research of experts in the field, and after discussion and confirmation with industry organizations or professional institutions, experts set the weight factors corresponding to the change rate of aquatic plant coverage and the change amount of water-passing cross-sectional area corresponding to the sub-river area according to their own experience and knowledge.

[0074] D2. Input the fish migration speed change rate and fish residence time distribution variation coefficient corresponding to each sub-channel area in the target area river into the fish migration assessment value evaluation model, and output the fish migration assessment value corresponding to each sub-channel area in the target area river.

[0075] It should be noted that the fish migration assessment value corresponding to each sub-channel area in the river of the target area is obtained by analyzing the aquatic plant assessment value corresponding to each sub-channel area in the river of the target area according to the above-mentioned analysis process.

[0076] In another specific embodiment, the ecological health assessment value corresponding to each sub-river channel area in the target area river is analyzed, and the specific analysis process is as follows: The aquatic plant assessment value and fish migration assessment value corresponding to each sub-river area in the target area are recorded as and , substitute into the calculation formula: middle, Obtain the ecological health assessment value corresponding to each sub-river area in the target area river ,in, and They are respectively represented as the aquatic plant assessment value and fish migration assessment value corresponding to the yth sub-river area in the target area. , They are the standard aquatic plant assessment value and standard fish migration assessment value corresponding to the set sub-river area. , They are respectively the weight factors corresponding to the aquatic plant assessment value of the set sub-river area and the weight factors corresponding to the fish migration assessment value.

[0077] in, , Both are greater than 0 and less than 1.

[0078] Furthermore, through the summary of a large amount of research data and experimental data, the standard aquatic plant assessment value and standard fish migration assessment value corresponding to the sub-river area are set according to professional institutions and research institutions. At the same time, based on the professional knowledge and research basis of experts in the field, and discussed and confirmed with industry organizations or professional institutions, the experts set the weight factors corresponding to the aquatic plant assessment value and the fish migration assessment value of the sub-river area according to their own experience and knowledge.

[0079] In another specific embodiment, the ecological health level corresponding to each sub-river area in the river of the target area is evaluated, and the specific evaluation process is as follows: E1. Compare the ecological health assessment value corresponding to each sub-river area in the river of the target area with the ecological health assessment value interval corresponding to each ecological health level in the database. If the ecological health assessment value corresponding to a sub-river area in the river of the target area is within the ecological health assessment value interval corresponding to a certain ecological health level in the database, then the ecological health level in the database is used as the ecological health level corresponding to the sub-river area in the river of the target area.

[0080] E2. If the ecological health level of the sub-river area in the target area is "low ecological health level", the emergency warning mechanism will be automatically triggered, and an electronic alarm will be sent to the ecological environment department, water conservancy authority, and local emergency management agency as soon as possible. The SMS group function will be used to push warning SMS messages to the heads of coastal communities, fishery farmers, and heads of nearby factories and enterprises to inform them that the river ecology in their area has deteriorated to the "low ecological health level". Inter-departmental seminars will be organized to jointly formulate a river ecological restoration plan, clarify the responsibilities and task nodes of each department, and ensure that the restoration work is carried out in an orderly manner.

[0081] E3. If the ecological health level of the sub-river area in the target area is "medium ecological health level", push the ecological health monitoring report to the ecological protection department and water conservancy research institutions, encourage fishermen to participate in aquatic biological reproduction and release activities, release local dominant fish seedlings, help restore fishery resources, and release river ecological "medium ecological health level" warning information through local media, community bulletin boards, and social media platforms to popularize ecological protection knowledge and call on the public to reduce the discarding of garbage and discharge of sewage into the river.

[0082] E4. If the ecological health level of the sub-river area in the target area is "high ecological health level", increase the monitoring frequency of the sub-river area, increase the number of biodiversity monitoring points, capture subtle changes in the ecosystem in an all-round and real-time manner, build a data sharing cloud platform, open the latest ecological data to all relevant departments, organize science popularization activities in schools and communities, and publicize the significance and value of the high ecological health level of the river.

[0083] In the embodiment of the present invention, the ecological health assessment unit collects key ecological indicators such as aquatic plant change data and fish migration change data through a special data acquisition unit, and uses the corresponding assessment model for quantitative analysis, and finally obtains the ecological health assessment value corresponding to each sub-river area, and then determines the ecological health level. This comprehensive and quantitative assessment method changes the limitations of relying on experience or qualitative judgment of ecological health status in the past, can more accurately reflect the real state changes of the ecosystem, and provides a reliable basis for scientific formulation of ecological protection strategies. Differentiated early warning prompts and response measures are implemented according to different ecological health levels (low, medium, and high), which can not only enable ecological protection departments, water conservancy research institutions and other professional forces to exert their efforts accurately, such as quickly organizing cross-departmental discussions to formulate restoration plans at "low ecological health levels", but also widely guide the public to participate in ecological protection. At the "medium ecological health level", through media publicity, calling on the public to reduce pollution emissions, etc., and at the "high ecological health level", popular science activities are carried out to enhance the public's awareness of ecological protection, creating a good atmosphere for the whole society to pay attention to and protect the river ecology together, which is conducive to the sustainable development of the ecosystem.

[0084] The embodiment of the present invention enables managers to have a comprehensive understanding of the hydrological characteristics, stability and ecological health of the river through automatic monitoring, which helps to optimize the scheduling and allocation of water resources. For example, when it is known that the ecological health of a sub-river area is not good and is related to the water flow, the operation mode of the water conservancy project can be reasonably adjusted to ensure the ecological water demand, while taking into account other water use functions such as flood control and irrigation, so as to achieve scientific management and efficient use of water resources. Through the long-term accumulation of various types of data and the analysis and comparison of conditions in different regions and different time periods, it can also provide strong data support for the formulation of more macro water resource protection and utilization plans, and promote the continuous improvement of regional water resource management level. At the same time, the system's full range of functions from hydrological disaster warning to ecological health assessment covers the comprehensive consideration of the physical form and ecological environment of the river, and can timely discover and respond to various adverse factors affecting the river ecosystem, whether it is riverbank erosion caused by abnormal water flow or ecological imbalance caused by the deterioration of the biological living environment. Effective early warning, response and restoration measures will help maintain the integrity of the river ecosystem structure and function, ensure its long-term stability, and thereby maintain the health of the entire river basin ecosystem, and give full play to its important ecological service functions in water conservation, climate regulation, biodiversity protection and other aspects.

[0085] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A real-time hydrological information automatic monitoring and disaster early warning alarm system, characterized by: include: River channel area division unit: used to divide the hydrological characteristics of the river channel in the target area, so as to obtain the sub-channel areas in the river channel in the target area, and then evaluate the river stability corresponding to the river channel in the target area; Hydrological disaster early warning unit: used to warn of hydrological disasters in the target area when the river stability corresponding to the target area river is abnormal; Ecological health assessment unit: used to assess the ecological health level of each sub-river area in the target area river when the hydrological disaster warning corresponding to the target area river reaches the first-level hydrological disaster warning, and issue early warning prompts.

2. A real-time hydrological information automatic monitoring and disaster early warning alarm system according to claim 1, characterized in that: The river area division unit also includes a small-scale hydrological data acquisition module and a small-scale hydrological data analysis module; wherein: The small-scale hydrological data acquisition module is used to obtain turbulent structure data, water vortex motion data and riverbank seepage data corresponding to each sub-channel area in the target area river; wherein the turbulent structure data includes Reynolds number and turbulence intensity; the water vortex motion data includes vortex frequency, axial velocity and tangential velocity corresponding to each vortex; the riverbank seepage data includes seepage velocity, seepage amount and groundwater level change rate; The small-scale hydrological data analysis module is used to analyze the turbulence structure data, water flow vortex motion data and riverbank seepage data corresponding to each sub-channel area in the river channel of the target area to obtain the turbulence structure evaluation value, water flow vortex motion evaluation value and riverbank seepage evaluation value corresponding to each sub-channel area in the river channel of the target area.

3. A real-time hydrological information automatic monitoring and disaster early warning alarm system according to claim 2, characterized in that: The analysis obtains the turbulence structure assessment value, water vortex motion assessment value and riverbank seepage assessment value corresponding to each sub-channel area in the target area river channel. The specific analysis process is as follows: A1. Input the Reynolds number and turbulence intensity corresponding to each sub-channel area in the target area river into the turbulence structure assessment value evaluation model, and output the turbulence structure assessment value corresponding to each sub-channel area in the target area river; A2. Input the vortex frequency corresponding to each sub-channel area in the target area river channel, the axial velocity and the tangential velocity corresponding to each vortex into the turbulence structure assessment value evaluation model, and output the water flow vortex motion evaluation value corresponding to each sub-channel area in the target area river channel; A3. Input the seepage velocity, seepage volume and groundwater level change rate corresponding to each sub-channel area in the target area river into the river bank seepage assessment model, and output the river bank seepage assessment value corresponding to each sub-channel area in the target area river.

4. The real-time hydrological information automatic monitoring and disaster early warning alarm system according to claim 1 is characterized by: The river stability corresponding to the river channel in the target area is evaluated, and the specific evaluation process is as follows: B1. Input the turbulence structure assessment value, water vortex motion assessment value and riverbank seepage assessment value corresponding to each sub-channel area in the target area river into the river stability assessment model, and output the river stability value result corresponding to the target area river; B2. The river stability value results include values ​​of 1 and -1. When the river stability value result corresponding to the river channel in the target area is 1, it indicates that the river stability corresponding to the river channel in the target area is normal. Conversely, when the river stability value result corresponding to the river channel in the target area is -1, it indicates that the river stability corresponding to the river channel in the target area is abnormal. In this way, the river stability corresponding to the river channel in the target area is evaluated.

5. A real-time hydrological information automatic monitoring and disaster early warning alarm system according to claim 4, characterized in that: The expression of the river stability assessment model is: ； In the formula, , and They are respectively represented as the turbulence structure assessment value, water vortex motion assessment value and riverbank seepage assessment value corresponding to the yth sub-channel area in the river channel of the target area. y represents the number corresponding to each sub-channel area. , is any integer greater than 2, It represents the river stability value result corresponding to the river in the target area. is the set river stability value threshold, where , , They are the standard turbulence structure assessment value, standard water vortex motion assessment value, and standard river bank seepage assessment value corresponding to the set sub-river channel area. , , They are the weight factors corresponding to the turbulence structure assessment value of the sub-channel area, the weight factors corresponding to the vortex motion assessment value of the water flow, and the weight factors corresponding to the river bank seepage assessment value. , , They are the adjustment factors corresponding to the turbulence structure assessment value of the sub-channel area, the adjustment factors corresponding to the vortex motion assessment value of the water flow, and the adjustment factors corresponding to the river bank seepage assessment value. Represents a natural constant.

6. A real-time hydrological information automatic monitoring and disaster early warning alarm system according to claim 1, characterized in that: When the river stability corresponding to the river channel in the target area is abnormal, a hydrological disaster warning is issued to the river channel in the target area. The specific warning process is as follows: C1. When the river stability corresponding to the river in the target area is abnormal, if the river stability value corresponding to the river in the target area does not exceed 10% of the set river stability value threshold, the river in the target area is marked as "Level 3 Hydrological Disaster Warning". At this time, the warning prompt information will be pushed to grassroots water conservancy patrol personnel and small-scale community management departments along the coast to increase the frequency of daily patrols and arrange 1-2 additional river bank inspections per day; C2. When the river stability corresponding to the river channel in the target area is abnormal, if the river stability value corresponding to the river channel in the target area does not exceed 10% of the set river stability value threshold, the river channel in the target area will be marked as "Second Level Hydrological Disaster Warning", and the warning information will be immediately transmitted to the emergency response team of the local water conservancy department, the management department of the small-scale community along the coast, and the street office with a large number of residents along the coast. Professional measurement equipment will be dispatched to review the seepage velocity at key points on the river bank, and drones will be used to take aerial photos of the vortex conditions at key bends. At the same time, low-lying areas around the river bank will be evacuated and temporary resettlement preparations will be made; C3. When the river stability corresponding to the river channel in the target area is abnormal, if the river stability value corresponding to the river channel in the target area does not exceed 10% of the set river stability value threshold, the river channel in the target area will be marked as "Level 1 Hydrological Disaster Warning", and the alarm will be sounded immediately. The warning information will be pushed to the key departments and institutions of the city and county-level emergency command centers, fire rescue teams, and large-scale water conservancy hub management units through multiple channels. At the same time, the assessment process of the ecological health level corresponding to each sub-river area in the river channel in the target area will be initiated.

7. The real-time hydrological information automatic monitoring and disaster early warning alarm system according to claim 1 is characterized by: The ecological health assessment unit also includes an ecological health data acquisition module and an ecological health assessment value analysis module; The ecological health data acquisition module is used to obtain the aquatic plant change data and fish migration change data corresponding to each sub-river area in the target area river, the aquatic plant change data includes the aquatic plant coverage change rate and the water cross-sectional area change, and the fish migration change data includes the fish migration speed change rate and the fish residence time distribution variation coefficient; The ecological health assessment value analysis module is used to analyze the aquatic plant change data and fish migration change data corresponding to each sub-river channel area in the river channel of the target area, so as to obtain the aquatic plant assessment value and fish migration assessment value corresponding to each sub-river channel area in the river channel of the target area, and then analyze the ecological health assessment value corresponding to each sub-river channel area in the river channel of the target area.

8. A real-time hydrological information automatic monitoring and disaster early warning alarm system according to claim 7, characterized in that: The analysis obtains the aquatic plant assessment value and fish migration assessment value corresponding to each sub-river area in the target area river. The specific analysis process is as follows: D1. Input the change rate of aquatic plant coverage and the change of water-passing cross-sectional area corresponding to each sub-channel area in the target area river into the aquatic plant assessment value assessment model, and output the aquatic plant assessment value corresponding to each sub-channel area in the target area river; D2. Input the fish migration speed change rate and fish residence time distribution variation coefficient corresponding to each sub-channel area in the target area river into the fish migration assessment value evaluation model, and output the fish migration assessment value corresponding to each sub-channel area in the target area river.

9. A real-time hydrological information automatic monitoring and disaster early warning alarm system according to claim 8, characterized in that: The ecological health assessment values ​​corresponding to each sub-river area in the target area river are analyzed, and the specific analysis process is as follows: The aquatic plant assessment value and fish migration assessment value corresponding to each sub-river area in the target area are recorded as and , substitute into the calculation formula: middle, Obtain the ecological health assessment value corresponding to each sub-river area in the target area river ,in, and They are respectively represented as the aquatic plant assessment value and fish migration assessment value corresponding to the yth sub-river area in the target area. , They are the standard aquatic plant assessment value and standard fish migration assessment value corresponding to the set sub-river area. , They are respectively the weight factors corresponding to the aquatic plant assessment value of the set sub-river area and the weight factors corresponding to the fish migration assessment value.

10. A real-time hydrological information automatic monitoring and disaster early warning alarm system according to claim 9, characterized in that: The specific assessment process of the ecological health level corresponding to each sub-river area in the target river area is as follows: E1. Compare the ecological health assessment values ​​corresponding to each sub-channel area in the target area with the ecological health assessment value intervals corresponding to each ecological health level in the database. If the ecological health assessment value corresponding to a sub-channel area in the target area is within the ecological health assessment value interval corresponding to a certain ecological health level in the database, then use the ecological health level in the database as the ecological health level corresponding to the sub-channel area in the target area; E2. If the ecological health level of the sub-river area in the target area is "low ecological health level", the emergency warning mechanism will be automatically triggered, and an electronic alarm will be sent to the ecological environment department, water conservancy authority, and local emergency management agency as soon as possible. The SMS group function will be used to push warning SMS messages to the heads of coastal communities, fishery farmers, and heads of nearby factories and enterprises to inform them that the river ecology in their area has deteriorated to the "low ecological health level". Inter-departmental seminars will be organized to jointly formulate a river ecological restoration plan, clarify the responsibilities and task nodes of each department, and ensure the orderly progress of restoration work; E3. If the ecological health level of the sub-river area in the target area is "medium ecological health level", push the ecological health monitoring report to the ecological protection department and water conservancy research institutions, encourage fishermen to participate in aquatic biological reproduction and release activities, release local dominant fish seedlings, help restore fishery resources, and release the "medium ecological health level" warning information of the river ecology through local media, community bulletin boards, and social media platforms to popularize ecological protection knowledge and call on the public to reduce the disposal of garbage and sewage into the river; E4. If the ecological health level of the sub-river area in the target area is "high ecological health level", increase the monitoring frequency of the sub-river area, increase the number of biodiversity monitoring points, capture subtle changes in the ecosystem in all directions and in real time, build a data sharing cloud platform, open the latest ecological data to all relevant departments, organize science popularization activities in schools and communities, and publicize the significance and value of the high ecological health level of the river.

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