A water environment early warning system and method for a tidal river section

Abstract

The application provides a water environment early warning system and method for a tidal river section, wherein the early warning system comprises a regional modeling subsystem, which is used for dividing and generalizing river regions according to a water system distribution map of a tidal river section region, and generating a tidal river section generalization map; a water flow simulation subsystem, which is used for simulating water flow states of rivers in each divided region of the tidal river section and updating water level values; and a river section early warning subsystem, which is used for displaying and early warning the generated tidal river section generalization map and water level values. The application is based on a MIKE model, simulates water flow states of rivers in each region according to water storage, and calculates regional water level values in real time by combining rainfall data and simulated states. The real-time water level values are displayed through a display or a mobile terminal, and early warning water level values are constructed by combining river channel heights, so that real-time high water level early warning of the tidal river section is effectively realized, and flood disasters are avoided.

Description

Technical Field

[0001] This invention relates to the field of flood early warning technology, and more specifically, to a water environment early warning system and method for tidal river sections. Background Technology

[0002] Tidal river sections are those easily affected by tides. In these sections, water levels and flow rates fluctuate periodically due to the effects of tides, increasing the risk and complexity of flooding. Therefore, flood warnings for tidal river sections are crucial.

[0003] Existing flood warning methods mostly rely on hydrological observation stations, mathematical model calculations, and remote sensing technology. Hydrological observation stations require real-time staff monitoring, mathematical model calculations often simplify real-world flood problems and fail to account for numerous influencing factors, and remote sensing technology is susceptible to severe weather, leading to inaccurate data. Therefore, there is an urgent need to further improve and refine warning methods and technologies to enhance the accuracy and timeliness of flood warnings and provide strong support for flood prevention and disaster reduction efforts in tidal river sections. Summary of the Invention

[0004] In view of this, the present invention proposes a water environment early warning system and method for tidal river sections to solve the problems existing in the prior art.

[0005] To achieve the above objectives, this invention proposes a water environment early warning system for tidal river sections, comprising a regional modeling subsystem, a water flow simulation subsystem, and a river section early warning subsystem connected in sequence. The regional modeling subsystem is used to divide and generalize the river region based on the water system distribution map of the tidal river section, and generate a generalized map of the tidal river section. The water flow simulation subsystem is used to simulate the water flow status of rivers in each divided area of ​​the tidal river section and update the water level value. The river section early warning subsystem is used to display and issue early warnings for the generated generalized map of the tidal river section and the water level values.

[0006] Optionally, the regional modeling subsystem includes a map input module, a regional division module, and a regional simulation module; the map input module is used to input a water system distribution map of the entire tidal river section; the regional division module is used to use a feature point distribution algorithm to label different rivers, sluices, and pumping stations on the water system distribution map to generate a water system division map of the tidal river section; the regional simulation module is used to generalize the rivers, sluices, and pumping stations in the water system division map to generate a generalized map of the tidal river section.

[0007] Optionally, the regional simulation module acquires the riverbed roughness, time step, and spatial step of each river segment, determines the boundary control conditions, sets the location, structure, and scheduling method of sluice gates and pumping stations based on engineering data, and assigns values ​​to the parameters of each gate and pumping station using a time series approach; merges water-carrying channels outside the main channel into one channel, and treats water-carrying channels without water-carrying conditions as land surfaces; generalizes the cross-sections of natural and artificial channels into different shapes, and interpolates a transition cross-section between two abrupt distributary cross-sections using the average bottom elevation of the two cross-sections.

[0008] Optionally, the water flow simulation subsystem includes a parameter setting module, a water flow simulation module, and a rainfall calculation module. The parameter setting module is used to input statistical data on the water storage capacity of the vegetation and soil layer in each divided area of ​​the tidal river section. The water flow simulation module is used to simulate the water flow state of the river mouth based on the generalized map of the tidal river section using the statistical data on the water storage capacity of the vegetation and soil layer and the hydrodynamic module of the MIKE model, based on the principles of mass conservation and momentum conservation. The rainfall calculation module is used to input statistical data on rainfall in each divided area of ​​the tidal river section, calculate the mean rainfall, skewness coefficient, and coefficient of variation of each divided area at different times based on the statistical data, and calculate the water level value of each divided area in combination with the water flow state simulation.

[0009] Optionally, the river section early warning subsystem includes a water level monitoring module and a water level early warning module. The water level monitoring module displays the generalized map of the tidal river section in real time via a display or mobile device, and displays the water level values ​​of the rainfall calculation module in the water flow simulation subsystem to the corresponding river areas. The water level early warning module obtains the channel height of the river in each divided area. When the water level value of the rainfall calculation module exceeds the channel height, it controls the water level monitoring module to flash the water level value exceeding the height as a warning.

[0010] On the other hand, to achieve the above objectives, this invention proposes a water environment early warning method for tidal river sections, comprising the following steps: Obtain a water system distribution map of the tidal river section area, divide and generalize the river channel area based on the water system distribution map, and generate a generalized map of the tidal river section. Based on the MIKE model, the flow status of rivers in each divided area of ​​the tidal river section was simulated and the water level values ​​were updated. The generated generalized map of the tidal river section and the water level values ​​are displayed and warned in real time.

[0011] Optionally, the process of dividing and generalizing river regions based on the water system distribution map includes: The feature point distribution algorithm is used to mark different rivers, sluice gates and pumping stations on the water system distribution map, obtain the riverbed roughness, time step and spatial step of each river segment, and determine the boundary control conditions. The location, structure and scheduling method of sluice gates and pumping stations are set according to engineering data, and the parameters of each gate and pumping station are assigned in a time series manner. Rivers other than the main river channel that have water conveyance functions are merged into one river channel, and river channels that do not have water conveyance functions are regarded as land surface. The cross-sections of natural and artificial river channels are generalized into different shapes, and a transition cross-section is interpolated between two abrupt distributary cross-sections using the average bottom elevation of the two cross-sections.

[0012] Optionally, the process of simulating the flow state of the river in each subdivided area of ​​the tidal river section and updating the water level values ​​based on the MIKE model includes: Input statistical data on the water storage capacity of the vegetation and soil layer in each divided area of ​​the tidal river section. Based on the statistical data on the water storage capacity of the vegetation and soil layer, use the hydrodynamic module of the MIKE model to simulate the water flow state of the river mouth based on the principles of mass conservation and momentum conservation.

[0013] Optionally, the process of simulating the flow state of rivers in different subdivided areas of the tidal river section and updating water level values ​​based on the MIKE model also includes: Input rainfall statistics for each division of the tidal river section, calculate the mean rainfall, skewness coefficient, and coefficient of variation for each division of the tidal river section at different times based on the rainfall statistics, and simulate and calculate the water level values ​​for each division based on the water flow conditions.

[0014] Optionally, the process of generating the generalized map of the tidal river section and the water level values ​​for real-time display and early warning includes: The generalized map of the tidal river section is displayed in real time via a monitor or mobile device, and the real-time updated water level values ​​are displayed to the corresponding river areas. The system obtains the channel height of each divided area of ​​the river. When the real-time updated water level value exceeds the channel height, the system controls the water level monitoring module to flash the water level value that exceeds the height as a warning.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention first divides and labels the regional river distribution map of tidal river sections, and uses the MIKE model to model the tidal river sections as a whole. During the modeling process, small channels and channels without water conveyance functions are simplified to reduce the system's computational load. Additional cross-sections are added to areas with large elevation differences to improve model stability. The water flow status of rivers in each region is simulated based on water storage, and regional water level values ​​are calculated in real time by combining rainfall data and simulation status. The real-time water level values ​​are displayed on a monitor or mobile device, and warning water level values ​​are constructed by combining the channel height of each region. This effectively realizes real-time warning of high water levels in tidal river sections and avoids flooding. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the water environment early warning system for tidal river sections in an embodiment of the present invention; Figure 2 This is a schematic diagram of the regional modeling subsystem structure of the tidal river section in an embodiment of the present invention; Figure 3 This is a schematic diagram of the water flow simulation subsystem structure of the tidal river section in an embodiment of the present invention; Figure 4 This is a schematic diagram of the river section early warning subsystem structure in an embodiment of the present invention. Figure 5 This is a schematic diagram of the water environment early warning method for tidal river sections in an embodiment of the present invention. Detailed Implementation

[0017] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0018] This embodiment proposes a water environment early warning system for tidal river sections, such as... Figure 1 As shown, it includes a region modeling subsystem, a water flow simulation subsystem, and a river segment early warning subsystem connected in sequence; The regional modeling subsystem is used to divide and generalize the river channel area based on the water system distribution map of the tidal river section area, and generate a generalized map of the tidal river section; the water flow simulation subsystem is used to simulate the water flow status of the river in each divided area of ​​the tidal river section and update the water level value; the river section early warning subsystem is used to display and issue early warnings on the generated generalized map of the tidal river section and the water level value.

[0019] In a preferred embodiment of this application, the regional modeling subsystem includes a map input module, a regional division module, and a regional simulation module. The map input module is used to input a water system distribution map of the entire tidal river section. The regional division module is used to use a feature point distribution algorithm to label different rivers, sluice gates, and pumping stations on the water system distribution map to generate a water system division map of the tidal river section. The regional simulation module is used to generalize the rivers, sluice gates, and pumping stations in the water system division map to generate a generalized map of the tidal river section.

[0020] Understandably, the feature point distribution algorithm applies Gaussian blurs at different scales to the generalized map of the tidal river section, forming a scale space. Then, local extrema are searched in this scale space, and these extrema are used as candidate feature points. For each candidate feature point, its precise location and scale are determined by fitting a three-dimensional quadratic function, while low-contrast keypoints and unstable edge response points are removed. For each keypoint, the principal direction is determined based on the gradient direction and magnitude of its neighboring pixels. Within the neighborhood of each keypoint, the image gradient direction and magnitude are statistically analyzed into a histogram to form a feature descriptor. Finally, features are extracted based on the feature descriptor. The feature point distribution algorithm can effectively distinguish and label different types of hydraulic facilities or rivers in the generalized map.

[0021] In a preferred embodiment of this application, the regional simulation module acquires the riverbed roughness, time step, and spatial step of each river segment, determines the boundary control conditions, sets the location, structure, and scheduling method of sluice gates and pumping stations based on engineering data, and assigns values ​​to the parameters of each sluice gate and pumping station using a time series approach; merges water-carrying channels other than the main channel into one channel, and treats water-carrying channels without water-carrying conditions as land surfaces; generalizes the cross-sections of natural and artificial channels into graphics of different shapes, and interpolates a cross-section between two abrupt distributary cross-sections using the average bottom elevation of the two cross-sections as a transition.

[0022] It is understandable that this embodiment simplifies the treatment of rivers and small rivers that do not have water conveyance conditions, which can reduce the computational burden of the system, ensure the real-time updating of water level data in the main river, and add extra cross sections in cross sections with large height differences, which effectively ensures the stability of the model.

[0023] In a preferred embodiment of this application, the water flow simulation subsystem includes a parameter setting module, a water flow simulation module, and a rainfall calculation module. The parameter setting module is used to input statistical data on the water storage capacity of the vegetation and soil layer in each divided area of ​​the tidal river section. The water flow simulation module is used to simulate the water flow state of the river mouth based on the generalized map of the tidal river section using the statistical data on the water storage capacity of the vegetation and soil layer and the hydrodynamic module of the MIKE model, based on the principles of mass conservation and momentum conservation. The rainfall calculation module is used to input statistical data on rainfall in each divided area of ​​the tidal river section, calculate the mean rainfall, skewness coefficient, and coefficient of variation of each divided area at different times based on the statistical data, and calculate the water level value of each divided area in combination with the water flow state simulation.

[0024] Understandably, the MIKE model uses advanced numerical calculation methods and physical process descriptions to accurately simulate complex hydrological and hydrodynamic processes, providing a scientific basis for water resource management and flood prevention. In this embodiment, the HD module of the MIKE model is used to simulate the flow state and water level of the tidal river section, which can fully reflect the water level status of each divided area.

[0025] In a preferred embodiment of this application, the river section early warning subsystem includes a water level monitoring module and a water level early warning module. The water level monitoring module displays the generalized map of the tidal river section in real time via a display or mobile device, and displays the water level values ​​of the rainfall calculation module in the water flow simulation subsystem to the corresponding river areas. The water level early warning module obtains the channel height of the river in each divided area. When the water level value of the rainfall calculation module exceeds the channel height, the water level monitoring module is controlled to flash the water level value exceeding the height as a warning.

[0026] It is understood that this embodiment uses a water level detection module to display the constructed generalized map of the tidal river section and the real-time calculated water level values, which allows users to conveniently view the water level data of each area of ​​the tidal river section in real time. Alarm thresholds are set according to the river channel height, and water levels in areas exceeding the thresholds are alerted, so as to promptly detect flood hazards and take timely measures. Example

[0027] This embodiment proposes a water environment early warning method for tidal river sections, such as... Figure 5 As shown, it includes the following steps: Obtain a water system distribution map of the tidal river section area, divide and generalize the river channel area based on the water system distribution map, and generate a generalized map of the tidal river section. Based on the MIKE model, the flow status of rivers in each divided area of ​​the tidal river section was simulated and the water level values ​​were updated. The generated generalized map of the tidal river section and the water level values ​​are displayed and warned in real time.

[0028] As a preferred embodiment of this application, the process of dividing and generalizing river areas based on the water system distribution map includes: The feature point distribution algorithm is used to mark different rivers, sluice gates and pumping stations on the water system distribution map, obtain the riverbed roughness, time step and spatial step of each river segment, and determine the boundary control conditions. The location, structure and scheduling method of sluice gates and pumping stations are set according to engineering data, and the parameters of each gate and pumping station are assigned in a time series manner. Rivers other than the main river channel that have water conveyance functions are merged into one river channel, and river channels that do not have water conveyance functions are regarded as land surface. The cross-sections of natural and artificial river channels are generalized into different shapes, and a transition cross-section is interpolated between two abrupt distributary cross-sections using the average bottom elevation of the two cross-sections.

[0029] As a preferred embodiment of this application, the process of simulating the flow state and updating the water level values ​​of rivers in different divisions of the tidal river section based on the MIKE model includes: Input statistical data on the water storage capacity of the vegetation and soil layer in each divided area of ​​the tidal river section. Based on the statistical data on the water storage capacity of the vegetation and soil layer, use the hydrodynamic module of the MIKE model to simulate the water flow state of the river mouth based on the principles of mass conservation and momentum conservation.

[0030] As a preferred embodiment of this application, the process of simulating the flow state of rivers in different divisions of the tidal river section and updating the water level values ​​based on the MIKE model further includes: Input rainfall statistics for each division of the tidal river section, calculate the mean rainfall, skewness coefficient, and coefficient of variation for each division of the tidal river section at different times based on the rainfall statistics, and simulate and calculate the water level values ​​for each division based on the water flow conditions.

[0031] As a preferred embodiment of this application, the process of real-time display and early warning of the generated generalized map of the tidal river section and the water level values ​​includes: The generalized map of the tidal river section is displayed in real time via a monitor or mobile device, and the real-time updated water level values ​​are displayed to the corresponding river areas. The system obtains the channel height of each divided area of ​​the river. When the real-time updated water level value exceeds the channel height, the system controls the water level monitoring module to flash the water level value that exceeds the height as a warning.

[0032] This embodiment first divides and labels the regional river distribution map of the tidal river section, and uses the MIKE model to model the tidal river section as a whole. During the modeling process, small channels and channels without water conveyance function are simplified to reduce the system's computational load. Additional cross-sections are added to cross-sectional areas with large height differences to improve model stability. The flow state of the rivers in each region is simulated based on the water storage, and the regional water level value is calculated in real time by combining rainfall data and simulation status. The real-time water level value is displayed on a monitor or mobile device, and an early warning water level value is constructed by combining the channel height of each region. This effectively realizes real-time early warning of high water levels in the tidal river section and avoids flooding.

[0033] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Regarding the methods disclosed in the embodiments, since they correspond to the systems disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the system section description.

[0034] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. All should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A water environment early warning system for tidal river sections, characterized in that, It includes a region modeling subsystem, a water flow simulation subsystem, and a river segment early warning subsystem, which are connected in sequence. The regional modeling subsystem is used to divide and generalize the river region based on the water system distribution map of the tidal river section, and generate a generalized map of the tidal river section. The water flow simulation subsystem is used to simulate the water flow status of rivers in each divided area of ​​the tidal river section and update the water level value. The river section early warning subsystem is used to display and issue early warnings for the generated generalized map of the tidal river section and the water level values; The regional modeling subsystem includes a map input module, a regional division module, and a regional simulation module. The map input module is used to input a map of the overall water system distribution of the tidal river section. The regional division module is used to use a feature point distribution algorithm to label different rivers, sluice gates, and pumping stations on the water system distribution map, generating a water system division map of the tidal river section. The regional simulation module is used to generalize the rivers, sluice gates, and pumping stations in the water system division map, generating a generalized map of the tidal river section. The regional simulation module acquires the riverbed roughness, time step, and spatial step of each river segment, determines the boundary control conditions, sets the location, structure, and scheduling method of sluice gates and pumping stations based on engineering data, assigns parameters to each gate and pumping station using a time series approach, merges water-carrying channels outside the main channel into one channel, treats water-carrying channels as land surfaces, generalizes the cross-sections of natural and artificial channels into different shapes, and interpolates a transition cross-section between two abrupt cross-sections at the river branch points using the average elevation of the bottom of the two cross-sections.

2. The water environment early warning system for tidal river sections according to claim 1, characterized in that, The water flow simulation subsystem includes a parameter setting module, a water flow simulation module, and a rainfall calculation module. The parameter setting module is used to input statistical data on the water storage capacity of the vegetation and soil layer in each divided area of ​​the tidal river section. The water flow simulation module is used to simulate the water flow state of the river mouth based on the statistical data of the water storage capacity of the vegetation and soil layer and the hydrodynamic module of the MIKE model, based on the principles of mass conservation and momentum conservation. The rainfall calculation module is used to input statistical data on rainfall in each divided area of ​​the tidal river section, calculate the mean rainfall, skewness coefficient, and coefficient of variation of each divided area at different times based on the statistical data, and calculate the water level value of each divided area in combination with the water flow state simulation.

3. The water environment early warning system for tidal river sections according to claim 2, characterized in that, The river section early warning subsystem includes a water level monitoring module and a water level early warning module. The water level monitoring module displays the generalized map of the tidal river section in real time via a monitor or mobile device, and displays the water level values ​​from the rainfall calculation module in the water flow simulation subsystem to the corresponding river areas. The water level early warning module obtains the channel height of the river in each divided area. When the water level value from the rainfall calculation module exceeds the channel height, it controls the water level monitoring module to flash the water level value exceeding the height as a warning.

4. A water environment early warning method for tidal river sections, applicable to the water environment early warning system for tidal river sections as described in claim 3, characterized in that, Includes the following steps: A river system distribution map of the tidal river section is obtained. Based on the river system distribution map, the river channel area is divided and generalized to generate a generalized map of the tidal river section. The process of dividing and generalizing the river channel area includes: using a feature point distribution algorithm to label different rivers, sluice gates, and pumping stations on the river system distribution map; obtaining the riverbed roughness, time step, and spatial step of each river segment; determining boundary control conditions; setting the location, structure, and scheduling method of sluice gates and pumping stations according to engineering data; assigning parameters to each gate and pumping station using a time series method; merging rivers with water conveyance functions other than the main river channel into one river channel; treating rivers without water conveyance conditions as land surfaces; generalizing the cross-sections of natural and artificial river channels with different shapes; and interpolating a cross-section between two abrupt distributary cross-sections using the average bottom elevation of the two cross-sections as a transition. Based on the MIKE model, the flow status of rivers in each divided area of ​​the tidal river section was simulated and the water level values ​​were updated. The generated generalized map of the tidal river section and the water level values ​​are displayed and warned in real time.

5. The water environment early warning method for tidal river sections according to claim 4, characterized in that, The process of simulating the flow state and updating the water level values ​​of rivers in different divisions of the tidal river section based on the MIKE model includes: Input statistical data on the water storage capacity of the vegetation and soil layer in each divided area of ​​the tidal river section. Based on the statistical data on the water storage capacity of the vegetation and soil layer, use the hydrodynamic module of the MIKE model to simulate the water flow state of the river mouth based on the principles of mass conservation and momentum conservation.

6. The water environment early warning method for tidal river sections according to claim 4, characterized in that, The process of simulating the flow state and updating the water level values ​​of rivers in different divisions of the tidal river section based on the MIKE model also includes: Input rainfall statistics for each division of the tidal river section, calculate the mean rainfall, skewness coefficient, and coefficient of variation for each division of the tidal river section at different times based on the rainfall statistics, and simulate and calculate the water level values ​​for each division based on the water flow conditions.

7. The water environment early warning method for tidal river sections according to claim 4, characterized in that, The process of generating the generalized map of the tidal river section and the water level values ​​for real-time display and early warning includes: The generalized map of the tidal river section is displayed in real time via a monitor or mobile device, and the real-time updated water level values ​​are displayed to the corresponding river areas. The system obtains the channel height of each divided area of ​​the river. When the real-time updated water level value exceeds the channel height, the system controls the water level monitoring module to flash the water level value that exceeds the height as a warning.

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