River blue line determination method, device and equipment and storage medium

Abstract

The invention discloses a river channel blue line determination method, which comprises the following steps: acquiring topographic data of a to-be-planned area, correcting the topographic data, and determining a catchment subarea of the to-be-planned area based on the corrected topographic data; according to the topographic data, determining a river branch center line in the catchment sub-area; carrying out design flood calculation on the catchment subarea by adopting an empirical formula method to obtain a design flood peak flow under a specific frequency; wherein the frequency is the reciprocal of the flood recurrence period; determining river surge sections in the catchment sub-area, and calculating the river surge width of each river surge section according to the designed peak flood flow; determining a final river surge line position according to the river surge center line and the river surge width, and drawing a river blue line based on the final river surge line position; the method can improve the accuracy of dividing the blue line of the river channel, and accurately reflects the actual condition of the natural river surge in the to-be-planned area.

Description

Technical Field

[0001] The present invention relates to the field of river management technology, and in particular to a method, device, equipment and storage medium for determining a river blue line. Background Art

[0002] The urban blue line is the core control line for protecting urban water bodies, and includes the geographical boundaries for protecting and controlling urban surface water bodies such as rivers, lakes, reservoirs, canals and wetlands. River and stream management and blue line demarcation are important measures to implement the concept of ecological civilization, implement water resource protection, and coordinate the relationship between urban and water development.

[0003] At present, when delineating river blue lines, naturally formed rivers or ditches in urban suburbs that are to be developed or have a low level of development are often ignored in land use planning due to their low river levels and are not included in river blue line management. This results in the existing river blue lines being out of touch with the actual river conditions and the accuracy of river blue line delineation being low. Therefore, there is an urgent need for a river blue line determination method that can accurately reflect the actual conditions of natural rivers with high precision. Summary of the invention

[0004] The embodiment of the present invention provides a method for determining a river blue line, which can improve the accuracy of delineating a river blue line.

[0005] In a first aspect, an embodiment of the present invention provides a method for determining a river blue line, comprising:

[0006] Acquire terrain data of the area to be planned, correct the terrain data, and determine the water catchment area of ​​the area to be planned based on the corrected terrain data;

[0007] Determine the center line of the river in the catchment area according to the topographic data;

[0008] The design flood of the catchment area is calculated by using an empirical formula method to obtain the design peak flow at a specific frequency; wherein the frequency is the inverse of the flood recurrence period;

[0009] Determine the river sections within the catchment area, and calculate the river width of each of the river sections according to the designed flood peak flow;

[0010] The final river line position is determined according to the river center line and the river width, and the river blue line is drawn based on the final river line position.

[0011] Furthermore, the acquiring of terrain data of the area to be planned, correcting the terrain data, and determining the water catchment area of ​​the area to be planned based on the corrected terrain data includes:

[0012] Acquire terrain data of the area to be planned, correct the terrain data, and calculate the water accumulation data of each grid in the area to be planned based on the corrected terrain data; wherein the water accumulation data includes the water flow accumulation and the water flow length;

[0013] Extracting a water flow path network according to the corrected terrain data and the water volume accumulation data, and vectorizing the water flow path network to obtain a water flow path vector line;

[0014] Acquire a water flow direction according to the water flow path vector line, and generate a basin area based on the water flow direction;

[0015] The water outlet of the water catchment area of ​​the basin region is determined, and the water catchment subarea is determined according to the water outlet of the water catchment area.

[0016] Furthermore, the determining of the water catchment area of ​​the area to be planned according to the water flow path vector line includes:

[0017] Acquire a water flow direction according to the water flow path vector line, and generate a basin area based on the water flow direction;

[0018] The water outlet of the water catchment area of ​​the basin region is determined, and the water catchment subarea is determined according to the water outlet of the water catchment area.

[0019] Furthermore, determining the center line of the river in the catchment area according to the terrain data includes:

[0020] Extracting a confluence path from the water catchment partition, and vectorizing the confluence path to obtain a first confluence path;

[0021] Verifying the first confluence path based on the terrain data to obtain a second confluence path;

[0022] According to the infrastructure data in the catchment area, the second catchment path is corrected to obtain the center line of the river; wherein the infrastructure data includes building data and road data.

[0023] Further, the verifying the first confluence path based on the terrain data to obtain the second confluence path includes:

[0024] comparing the first confluence path with the terrain data;

[0025] If there is a river in the terrain data, compare the river line position of the river with the path difference of the first confluence path, and modify the first confluence path according to the path difference to obtain a second confluence path;

[0026] If there is no river in the terrain data, the first confluence path is recorded as the second confluence path.

[0027] Furthermore, the empirical formula method is used to calculate the design flood for the catchment area to obtain the design flood peak flow at a specific frequency, including:

[0028] Obtaining the area of ​​the catchment zone and the length of the river, and calculating the river slope based on the length of the river;

[0029] Design the rainstorm according to the preset drainage design standard to obtain the design rainstorm volume;

[0030] Based on the area, the length of the river, the slope of the river and the designed rainstorm amount, the designed flood peak flow at a specific frequency is calculated using an empirical formula method.

[0031] Furthermore, the determining of the river sections within the catchment area and calculating the river width of each of the river sections according to the designed flood peak flow includes:

[0032] According to the terrain data, obtaining the ground elevation line in the catchment area, and determining the river longitudinal section based on the ground elevation line;

[0033] Determine the river cross section according to the surrounding environment of the river, and determine the river cross section based on the river longitudinal section and the river cross section;

[0034] The river width of each of the river sections is calculated according to the designed flood peak flow; wherein the river width is the minimum river width of the river section that satisfies the flow capacity.

[0035] Furthermore, the method further comprises:

[0036] A one-dimensional river hydrodynamic model is established according to the river flood process line and the downstream connecting river water level process line, and the river water surface line is calculated based on the one-dimensional river hydrodynamic model;

[0037] Based on the river water surface line, wave jumping height and superelevation height, the embankment top elevation line is determined, and the river regulation is carried out according to the embankment top elevation line; wherein the wave jumping height is the wave height generated by the flood in the river, and the superelevation height is the safety margin height set to prevent the river water from overflowing.

[0038] In a second aspect, an embodiment of the present invention provides a river blue line determination device, comprising:

[0039] A water catchment zone determination module, used to obtain terrain data of the area to be planned, correct the terrain data, and determine the water catchment zone of the area to be planned based on the corrected terrain data;

[0040] A river centerline determination module, used to determine the river centerline within the catchment area according to the terrain data;

[0041] A design flood module, used to calculate the design flood for the catchment area using an empirical formula method to obtain a design flood peak flow at a specific frequency; wherein the frequency is the inverse of the flood recurrence period;

[0042] A river width calculation module, used to determine the river sections within the catchment area, and calculate the river width of each of the river sections according to the designed flood peak flow;

[0043] The river blue line drawing module is used to determine the final river line position according to the river center line and the river width, and draw the river blue line based on the final river line position.

[0044] In a third aspect, an embodiment of the present invention provides an electronic device, including:

[0045] Memory for storing computer programs;

[0046] A processor, configured to execute the computer program;

[0047] Wherein, when the processor executes the computer program, the method for determining the river blue line described in any one of the first aspects above is implemented.

[0048] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed, the method for determining the river blue line described in any one of the first aspects above is implemented.

[0049] Compared with the prior art, a method for determining a river blue line provided by an embodiment of the present invention has the following beneficial effects: by acquiring terrain data of an area to be planned, the terrain data is corrected, and the watershed division of the area to be planned is determined based on the corrected terrain data; according to the terrain data, the center line of the river in the watershed division is determined; the design flood of the watershed division is calculated using an empirical formula method to obtain a design peak flow at a specific frequency; wherein the frequency is the inverse of the flood recurrence period; the river section in the watershed division is determined, and the river width of each river section is calculated according to the design peak flow; the final river line position is determined according to the river center line and the river width, and the river blue line is drawn based on the final river line position; the present invention can improve the accuracy of river blue line delineation and accurately reflect the actual conditions of natural rivers in the area to be planned. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical features of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0051] Figure 1 It is a flow chart of an embodiment of a method for determining a river blue line provided by the present invention;

[0052] Figure 2 It is a schematic diagram of a river longitudinal section of an embodiment of a method for determining a river blue line provided by the present invention;

[0053] Figure 3 It is a schematic diagram of river width of an embodiment of a method for determining a river blue line provided by the present invention;

[0054] Figure 4 It is a structural schematic diagram of an embodiment of a river blue line determination device provided by the present invention;

[0055] Figure 5 It is a structural schematic diagram of an embodiment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein are only for the purpose of describing the embodiments of the present invention and are not intended to limit the present invention.

[0059] In a first aspect, an embodiment of the present invention provides a method for determining a river blue line, see Figure 1, which is a flow chart of an embodiment of a method for determining a river blue line provided by the present invention.

[0060] like Figure 1 As shown, the method comprises the following steps:

[0061] S1: Acquire terrain data of the area to be planned, modify the terrain data, and determine the water catchment area of ​​the area to be planned based on the modified terrain data;

[0062] S2: Determine the center line of the river in the catchment area according to the terrain data;

[0063] S3: Calculate the design flood for the catchment area using an empirical formula method to obtain a design peak flow at a specific frequency; wherein the frequency is the inverse of the flood recurrence period;

[0064] S4: determining the river sections within the catchment area, and calculating the river width of each of the river sections according to the designed flood peak flow;

[0065] S5: Determine the final river line position according to the river center line and the river width, and draw the river blue line based on the final river line position.

[0066] In the specific implementation, high-precision DEM terrain data of the area to be planned is obtained, the terrain data is corrected, the watershed division of the area to be planned is determined based on the corrected terrain data, and the center line of the river in the watershed division is determined, the drainage standard is selected, the design flood calculation is performed, the design peak flow at a specific frequency is obtained, the river longitudinal section is generated as required, the river width of each river longitudinal section is calculated, and the river plane vector line position is drawn according to the river center line and the river width. The planning restriction elements such as urban planning and construction land and permanent basic farmland are superimposed, the river plane vector line position and its width are corrected, and the cross-sectional flow capacity of the corrected river plane vector line position meets the requirements. When the flow capacity of the entire line meets the requirements and there is no serious planning conflict, the final river line position can be obtained.

[0067] The water control line is delineated based on the final river and creek line width. According to local standards, the river and creek management scope line is drawn at a certain width outside the water control line. The conflict between the river and creek management scope line and the national air blue line is checked. If there is no conflict or the conflict is small, the river and creek management line scope can be considered to be included in the national air blue line management. Otherwise, the water control line will be included in the national air blue line, and the delineation of the national air blue line will be completed.

[0068] In summary, the present invention obtains the terrain data of the area to be planned, modifies the terrain data, and determines the watershed division of the area to be planned based on the modified terrain data; determines the center line of the river in the watershed division according to the terrain data; uses the empirical formula method to calculate the design flood for the watershed division to obtain the design peak flow at a specific frequency; wherein the frequency is the inverse of the flood recurrence period; determines the river section in the watershed division, and calculates the river width of each river section according to the design peak flow; determines the final river line position according to the river center line and the river width, and draws the river blue line based on the final river line position; can take into account the rivers or ditches in the suburban areas of cities that are to be developed or have a low degree of development, and include them in the blue line management, thereby improving the accuracy of the river blue line delineation and accurately reflecting the actual conditions of the natural rivers in the area to be planned.

[0069] In an optional implementation manner, the acquiring terrain data of the area to be planned, correcting the terrain data, and determining the water catchment area of ​​the area to be planned based on the corrected terrain data includes:

[0070] Acquire terrain data of the area to be planned, correct the terrain data, and calculate the water accumulation data of each grid in the area to be planned based on the corrected terrain data; wherein the water accumulation data includes the water flow accumulation and the water flow length;

[0071] Extracting a water flow path network according to the corrected terrain data and the water volume accumulation data, and vectorizing the water flow path network to obtain a water flow path vector line;

[0072] Acquire a water flow direction according to the water flow path vector line, and generate a basin area based on the water flow direction;

[0073] The water outlet of the water catchment area of ​​the basin region is determined, and the water catchment subarea is determined according to the water outlet of the water catchment area.

[0074] Specifically, high-precision DEM (1×1) terrain data of the area to be planned is obtained. There are some depressions in the terrain data. The depressions do not truly represent the terrain, but are caused by data errors. Therefore, the terrain data must be corrected. The depressions in the terrain data are calculated using the direction of water flow, and the depressions are filled according to their depths to generate terrain data without depressions. Based on the terrain data without depressions, the amount of water flowing through each grid in the area to be planned is calculated to obtain the accumulated water flow in the area, and the length of the water flow is calculated.

[0075] According to the corrected terrain data and water accumulation data, the surface runoff overland flow model is used to extract the water flow path network, and the water flow path network is vectorized to obtain the water flow path vector line. The water flow direction is obtained using GIS software, and the basin area range is generated based on the water flow direction data. In the basin area, the water outlet of the catchment area is determined, and the water catchment area is determined according to the water outlet of the catchment area. The water catchment area is converted into vector data, and the water catchment area line is corrected according to the existing and planned rainwater pipe network data in and around the water catchment area to form the final water catchment area line.

[0076] In an optional implementation, determining the center line of the river in the catchment area according to the terrain data includes:

[0077] Extracting a confluence path from the water catchment partition, and vectorizing the confluence path to obtain a first confluence path;

[0078] Verifying the first confluence path based on the terrain data to obtain a second confluence path;

[0079] According to the infrastructure data in the catchment area, the second catchment path is corrected to obtain the center line of the river; wherein the infrastructure data includes building data and road data.

[0080] Specifically, vector data of the catchment area is obtained, which represents the area where water converges. The catchment path is extracted using a tool or algorithm for extracting the catchment path, and the catchment path is vectorized to obtain a first catchment path. The first catchment path is verified based on terrain data to obtain a second catchment path. Infrastructure data within the catchment area, including building data and road data, is obtained, and the second catchment path is corrected. The corrected catchment path is the centerline of the river, which can accurately reflect the actual path of the water flow within the catchment area.

[0081] In an optional implementation manner, the verifying the first confluence path based on the terrain data to obtain the second confluence path includes:

[0082] comparing the first confluence path with the terrain data;

[0083] If there is a river in the terrain data, compare the river line position of the river with the path difference of the first confluence path, and modify the first confluence path according to the path difference to obtain a second confluence path;

[0084] If there is no river in the terrain data, the first confluence path is recorded as the second confluence path.

[0085] Specifically, the first confluence path is checked based on the topographic map. If there are rivers or ditches in the topographic map, the river line position of the river or ditch is compared with the path difference of the first confluence path, and the first confluence path is corrected according to the path difference to obtain the second confluence path. If there are no rivers or ditches in the topographic map, the first confluence path shall prevail without correction.

[0086] In an optional implementation manner, the use of an empirical formula method to calculate the design flood for the catchment area to obtain the design flood peak flow at a specific frequency includes:

[0087] Obtaining the area of ​​the catchment zone and the length of the river, and calculating the river slope based on the length of the river;

[0088] Design the rainstorm according to the preset drainage design standard to obtain the design rainstorm volume;

[0089] Based on the area, the length of the river, the slope of the river and the designed rainstorm amount, the designed flood peak flow at a specific frequency is calculated using an empirical formula method.

[0090] Specifically, the drainage design standard for the catchment area is determined according to the superior planning and relevant specifications and standards. Generally, the drainage standard for non-central urban areas is once in 10-20 years. According to the area F of the catchment area and the length L of the river, the river section is selected to calculate the river slope J. The formula is as follows:

[0091]

[0092] Among them, Z0, Z1, ... Z n Indicates the elevation of each section of the river, L1, L2...L n It represents the length between each section of the river, where n is the number of sections.

[0093] Furthermore, when there is a clear design rainfall type in the planned area, the design rainfall type can be directly used. When there is no clear rainfall type, the maximum 24-hour rainstorm volume under the corresponding drainage standard frequency is calculated according to the "Rainstorm Runoff Calculation Chart" and its user manual. Based on the area, the length of the river, the slope of the river and the design rainstorm volume, the design peak flow Q under a specific frequency is calculated using the empirical formula method. p , the formula is as follows:

[0094] Q p =C p H 24p F 0.84 / (L / J 1 / 3 ) 0.15 ;

[0095] Among them, C pis a frequency-dependent coefficient that can be determined using graphical trial and error and the least squares method. 24p It is the 24-hour design rainfall volume with corresponding frequency, where frequency is the inverse of flood recurrence period, indicating the possibility of a flood of a certain magnitude occurring in unit time.

[0096] In an optional implementation manner, the determining of the river sections within the catchment area and calculating the river width of each of the river sections according to the designed flood peak flow includes:

[0097] According to the terrain data, obtaining the ground elevation line in the catchment area, and determining the river longitudinal section based on the ground elevation line;

[0098] Determine the river cross section according to the surrounding environment of the river, and determine the river cross section based on the river longitudinal section and the river cross section;

[0099] The river width of each of the river sections is calculated according to the designed flood peak flow; wherein the river width is the minimum river width of the river section that satisfies the flow capacity.

[0100] Specifically, the ground elevation lines of the river in the catchment area are analyzed based on the DEM terrain data, combined with the requirements of the control water level and landscape water depth in the special flood control and drainage plan of the area, and the connection conditions of the rainwater pipe network are comprehensively considered to determine the longitudinal section of the river. For example, see Figure 2 The figure shows a schematic diagram of the longitudinal section of the river, where H1 is the height difference between the ground and the water surface when considering the hydraulic conditions of rainwater connection, and H2 is the controlled water depth.

[0101] Furthermore, the form of the river cross section is determined according to the surrounding environment of the river. If the river is surrounded by existing village buildings, the river cross section adopts a rectangular cross section. If the river is surrounded by farmland or vegetable fields, the river cross section adopts a trapezoidal cross section. The ratio of the design peak flow and the flow velocity under the corresponding slope of the river is calculated to obtain the river cross section area. Based on the river cross section area, the minimum river width of each river section that meets the flow capacity is calculated. For example, see Figure 3 As shown, it is a schematic diagram of river width, where the left picture is a trapezoidal river cross-section, the right picture is a rectangular river cross-section, and B represents the river width in different sections.

[0102] In an optional embodiment, the method further includes:

[0103] A one-dimensional river hydrodynamic model is established according to the river flood process line and the downstream connecting river water level process line, and the river water surface line is calculated based on the one-dimensional river hydrodynamic model;

[0104] Based on the river water surface line, wave jumping height and superelevation height, the embankment top elevation line is determined, and the river regulation is carried out according to the embankment top elevation line; wherein the wave jumping height is the wave height generated by the flood in the river, and the superelevation height is the safety margin height set to prevent the river water from overflowing.

[0105] Specifically, relevant data on the river flood process line and the water level process line of the downstream connecting river are collected, and a one-dimensional river hydrodynamic model is constructed using the collected data, and the river water surface line is calculated based on the model.

[0106] Furthermore, the wave break height is calculated based on the waves generated by floods in rivers and creeks. In order to prevent the river water from overflowing the embankment under extreme circumstances, an extra-high height, namely the safety margin height, is set. The river and creek water surface line, the wave break height and the extra-high height are added together to obtain the embankment top elevation line. This line represents the minimum height that the embankment should reach during floods to ensure the safety of the rivers and creeks. According to the embankment top elevation line, the rivers and creeks can be effectively regulated, the flood control capacity of the rivers and creeks during floods can be improved, and the safety of the surrounding areas can be guaranteed.

[0107] In a second aspect, an embodiment of the present invention provides a device for determining a river blue line, see Figure 2 , which is a structural schematic diagram of an embodiment of a river blue line determination device provided by the present invention.

[0108] like Figure 2 As shown, the device comprises:

[0109] The water catchment area determination module 21 is used to obtain terrain data of the area to be planned, modify the terrain data, and determine the water catchment area of ​​the area to be planned based on the modified terrain data;

[0110] A river centerline determination module 22, used to determine the river centerline within the catchment area according to the terrain data;

[0111] The design flood module 23 is used to calculate the design flood for the catchment area using an empirical formula method to obtain a design flood peak flow at a specific frequency; wherein the frequency is the inverse of the flood recurrence period;

[0112] A river width calculation module 24 is used to determine the river sections within the catchment area and calculate the river width of each of the river sections according to the designed flood peak flow;

[0113] The river blue line drawing module 25 is used to determine the final river line position according to the river center line and the river width, and draw the river blue line based on the final river line position.

[0114] In an optional implementation, the water catchment area determination module 21 is further used to:

[0115] Acquire terrain data of the area to be planned, correct the terrain data, and calculate the water accumulation data of each grid in the area to be planned based on the corrected terrain data; wherein the water accumulation data includes the water flow accumulation and the water flow length;

[0116] Extracting a water flow path network according to the corrected terrain data and the water volume accumulation data, and vectorizing the water flow path network to obtain a water flow path vector line;

[0117] Acquire a water flow direction according to the water flow path vector line, and generate a basin area based on the water flow direction;

[0118] The water outlet of the water catchment area of ​​the basin region is determined, and the water catchment subarea is determined according to the water outlet of the water catchment area.

[0119] In an optional implementation, the water catchment area determination module 21 is further used to:

[0120] Acquire a water flow direction according to the water flow path vector line, and generate a basin area based on the water flow direction;

[0121] The water outlet of the water catchment area of ​​the basin region is determined, and the water catchment subarea is determined according to the water outlet of the water catchment area.

[0122] In an optional implementation, the river centerline determination module 22 is further used to:

[0123] Extracting a confluence path from the water catchment partition, and vectorizing the confluence path to obtain a first confluence path;

[0124] Verifying the first confluence path based on the terrain data to obtain a second confluence path;

[0125] According to the infrastructure data in the catchment area, the second catchment path is corrected to obtain the center line of the river; wherein the infrastructure data includes building data and road data.

[0126] In an optional implementation, the river centerline determination module 22 is further used to:

[0127] comparing the first confluence path with the terrain data;

[0128] If there is a river in the terrain data, compare the river line position of the river with the path difference of the first confluence path, and modify the first confluence path according to the path difference to obtain a second confluence path;

[0129] If there is no river in the terrain data, the first confluence path is recorded as the second confluence path.

[0130] In an optional implementation, the design flood module 23 is further used to:

[0131] Obtaining the area of ​​the catchment zone and the length of the river, and calculating the river slope based on the length of the river;

[0132] Design the rainstorm according to the preset drainage design standard to obtain the design rainstorm volume;

[0133] Based on the area, the length of the river, the slope of the river and the designed rainstorm amount, the designed flood peak flow at a specific frequency is calculated using an empirical formula method.

[0134] In an optional implementation, the river width calculation module 24 is further used for:

[0135] According to the terrain data, obtaining the ground elevation line in the catchment area, and determining the river longitudinal section based on the ground elevation line;

[0136] Determine the river cross section according to the surrounding environment of the river, and determine the river cross section based on the river longitudinal section and the river cross section;

[0137] The river width of each of the river sections is calculated according to the designed flood peak flow; wherein the river width is the minimum river width of the river section that satisfies the flow capacity.

[0138] In an optional embodiment, the device further comprises a river regulation module, which is used to:

[0139] A one-dimensional river hydrodynamic model is established according to the river flood process line and the downstream connecting river water level process line, and the river water surface line is calculated based on the one-dimensional river hydrodynamic model;

[0140] Based on the river water surface line, wave jumping height and superelevation height, the embankment top elevation line is determined, and the river regulation is carried out according to the embankment top elevation line; wherein the wave jumping height is the wave height generated by the flood in the river, and the superelevation height is the safety margin height set to prevent the river water from overflowing.

[0141] In a third aspect, an embodiment of the present invention provides an electronic device, see Figure 5 , which is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0142] like Figure 3 As shown, the device includes:

[0143] A memory 31, used for storing computer programs;

[0144] A processor 32, configured to execute the computer program;

[0145] Wherein, when the processor 32 executes the computer program, the method for determining the river blue line as described in any of the above embodiments is implemented.

[0146] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory 31 and executed by the processor 32 to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program in the electronic device.

[0147] The processor 32 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0148] The memory 31 can be used to store the computer program and / or module, and the processor 32 realizes various functions of the electronic device by running or executing the computer program and / or module stored in the memory 31, and calling the data stored in the memory 31. The memory 31 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 31 can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0149] It should be noted that the above electronic device includes, but is not limited to, a processor and a memory. Those skilled in the art can understand that Figure 5The structural diagram is merely an example of the electronic device described above and does not constitute a limitation on the electronic device, and may include more components than shown in the figure, or a combination of certain components, or different components.

[0150] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed, the method for determining the river blue line described in any of the above embodiments is implemented.

[0151] It should be understood that the present invention can implement all or part of the processes in the above-mentioned river blue line determination method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned river blue line determination method can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0152] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. It should be pointed out that for those skilled in the art, several equivalent obvious variations and / or equivalent substitutions can be made without departing from the technical principles of the present invention. These obvious variations and / or equivalent substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A method for determining a river blue line, characterized in that: include: Acquire terrain data of the area to be planned, correct the terrain data, and determine the water catchment area of ​​the area to be planned based on the corrected terrain data; Determine the center line of the river in the catchment area according to the topographic data; The design flood of the catchment area is calculated by using an empirical formula method to obtain the design peak flow at a specific frequency; wherein the frequency is the inverse of the flood recurrence period; Determine the river sections within the catchment area, and calculate the river width of each of the river sections according to the designed flood peak flow; The final river line position is determined according to the river center line and the river width, and the river blue line is drawn based on the final river line position.

2. The method for determining the river blue line according to claim 1, characterized in that: The step of acquiring terrain data of the area to be planned, correcting the terrain data, and determining the water catchment area of ​​the area to be planned based on the corrected terrain data includes: Acquire terrain data of the area to be planned, correct the terrain data, and calculate the water accumulation data of each grid in the area to be planned based on the corrected terrain data; wherein the water accumulation data includes the water flow accumulation and the water flow length; Extracting a water flow path network according to the corrected terrain data and the water volume accumulation data, and vectorizing the water flow path network to obtain a water flow path vector line; Acquire a water flow direction according to the water flow path vector line, and generate a basin area based on the water flow direction; The water outlet of the water catchment area of ​​the basin region is determined, and the water catchment subarea is determined according to the water outlet of the water catchment area.

3. The method for determining the river blue line according to claim 1, characterized in that: Determining the center line of the river in the catchment area according to the terrain data includes: Extracting a confluence path from the water catchment partition, and vectorizing the confluence path to obtain a first confluence path; Verifying the first confluence path based on the terrain data to obtain a second confluence path; According to the infrastructure data in the catchment area, the second catchment path is corrected to obtain the center line of the river; wherein the infrastructure data includes building data and road data.

4. The method for determining the river blue line according to claim 3, characterized in that: The verifying the first confluence path based on the terrain data to obtain a second confluence path includes: comparing the first confluence path with the terrain data; If there is a river in the terrain data, compare the river line position of the river with the path difference of the first confluence path, and modify the first confluence path according to the path difference to obtain a second confluence path; If there is no river in the terrain data, the first confluence path is recorded as the second confluence path.

5. The method for determining the river blue line according to claim 1, characterized in that: The empirical formula method is used to calculate the design flood of the catchment area to obtain the design flood peak flow at a specific frequency, including: Obtaining the area of ​​the catchment zone and the length of the river, and calculating the river slope based on the length of the river; Design the rainstorm according to the preset drainage design standard to obtain the design rainstorm volume; Based on the area, the length of the river, the slope of the river and the designed rainstorm amount, the designed flood peak flow at a specific frequency is calculated using an empirical formula method.

6. The method for determining the river blue line according to claim 1, characterized in that: The determining of the river sections within the catchment area and calculating the river width of each of the river sections according to the designed flood peak flow comprises: According to the terrain data, obtaining the ground elevation line in the catchment area, and determining the river longitudinal section based on the ground elevation line; Determine the river cross section according to the surrounding environment of the river, and determine the river cross section based on the river longitudinal section and the river cross section; The river width of each of the river sections is calculated according to the designed flood peak flow; wherein the river width is the minimum river width of the river section that satisfies the flow capacity.

7. The method for determining the river blue line according to claim 1, characterized in that: The method further comprises: A one-dimensional river hydrodynamic model is established according to the river flood process line and the downstream connecting river water level process line, and the river water surface line is calculated based on the one-dimensional river hydrodynamic model; Based on the river water surface line, wave jumping height and superelevation height, the embankment top elevation line is determined, and the river regulation is carried out according to the embankment top elevation line; wherein the wave jumping height is the wave height generated by the flood in the river, and the superelevation height is the safety margin height set to prevent the river water from overflowing.

8. A device for determining a river blue line, characterized in that: include: A water catchment zone determination module, used to obtain terrain data of the area to be planned, correct the terrain data, and determine the water catchment zone of the area to be planned based on the corrected terrain data; A river centerline determination module, used to determine the river centerline within the catchment area according to the terrain data; A design flood module, used to calculate the design flood for the catchment area using an empirical formula method to obtain a design flood peak flow at a specific frequency; wherein the frequency is the inverse of the flood recurrence period; A river width calculation module, used to determine the river sections within the catchment area, and calculate the river width of each of the river sections according to the designed flood peak flow; The river blue line drawing module is used to determine the final river line position according to the river center line and the river width, and draw the river blue line based on the final river line position.

9. An electronic device, characterized in that: include: Memory for storing computer programs; A processor, configured to execute the computer program; Wherein, when the processor executes the computer program, the method for determining the river blue line as described in any one of claims 1 to 6 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed, the method for determining the river blue line according to any one of claims 1 to 6 is implemented.

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