CN112308967A - Urban flood risk numerical simulation analysis method based on production convergence analysis - Google Patents
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Abstract
The invention discloses an urban flood risk numerical simulation analysis method based on production convergence analysis, wherein a geographic information system, an applied analysis condition, an urban building information model and a flood risk numerical simulation are arranged in the urban flood risk numerical simulation analysis method, the output end of the geographic information system is connected with the input end of the applied analysis condition, and the output end of the urban building information model is connected with the input end of the applied analysis condition. The method needs to collect city information including building information before use, a three-dimensional city model is built, so that conditions affecting flood can be better met in the process of analyzing the city flood, including building strength, building density, river channel capacity and the like.
Description
Technical Field
The invention relates to the technical field of production convergence analysis, in particular to a numerical simulation analysis method for urban flood risk based on production convergence analysis.
Background
When rainfall meets the requirements of plant interception, depression water storage and surface soil storage, the subsequent rainfall intensity exceeds the infiltration intensity, the rainfall exceeds the infiltration intensity, and the rainfall begins to flow along the surface slope after falling to the ground, namely slope overflow, which is the beginning of runoff. If the rainfall is increased continuously, the range of the overflow flow is increased, so that the comprehensive overflow flow is formed, and the super-seepage rain flows along the slope and is poured into the river channel, which is called slope runoff. The process of ground overflow, namely the runoff producing stage, is that runoff produced by rainfall is converged to a nearby river network, flows from upstream to downstream, and finally flows through the outlet section of a drainage basin, namely river network convergence, and the process of river network convergence is the convergence stage.
However, the early flood risk detection method is not suitable for urban buildings constructed quickly, the flow direction and strength of flood are disturbed by high buildings, the existing urban flood cannot be well prevented and controlled before occurrence, great impact is caused to urban construction, and general flood simulation is two-dimensional, so that the simulation result is not accurate enough, and a good simulation analysis effect cannot be achieved.
Disclosure of Invention
The invention aims to provide a city flood risk numerical simulation analysis method based on production convergence analysis, and aims to solve the problems that the early flood risk detection method proposed in the background technology is not suitable for rapidly-constructed city buildings, the flow direction and the strength of flood are interfered by high-rise buildings, the existing city flood cannot be well controlled before the urban flood occurs, great impact is caused to the city construction, and the general flood simulation is two-dimensional, so that the simulation result is not accurate enough, and the good simulation analysis effect cannot be achieved.
In order to achieve the purpose, the invention provides the following technical scheme: the city flood risk numerical simulation analysis method based on the production convergence analysis comprises the following steps:
the method comprises the following steps: selecting the water surface height, the runoff volume, the river width and the watershed area of a watershed in a region to be measured by using a GIS system from a geographic information system, measuring and calculating the influence of the region through which river runoff flows on a city, and measuring and calculating the water storage capacity of a plurality of different diversion riverways according to the data;
step two: building a flow database of a river basin based on urban three-dimensional image modeling, placing a plurality of monitoring devices for observing data check points, setting the monitoring points as monitoring points, synchronously uploading data, keeping the data updated, and transmitting the data to the inside of an applied analysis condition in real time;
step three: the method comprises the steps that historical building area data around a city are sampled by utilizing a city building information model, a 3D digital city model is built at the same time, space information is selected for integration, and after the integrated data, a city flood risk analysis module can be built and led into the interior where analysis conditions are applied, so that accurate data are provided for flood risk numerical simulation analysis;
step four: according to the obtained information conditions, obtaining initial conditions before product convergence in the city and boundary conditions after adding a plurality of data, establishing a complete template for product convergence analysis, selecting typical data, automatically generating production convergence data through a programming rule, adding actual data, comparing with typical parameters, and verifying;
step five: and finally, carrying out stress analysis on the input data through monitoring points distributed at multiple positions in the city, displaying a three-dimensional graph of the urban water flow trend and the water depth degree after the flood appears through other data after the stress analysis of each point in the city, identifying flood disaster risk intensity of the monitoring points on the three-dimensional graph, and prompting surrounding personnel with higher flood intensity to pay attention to avoid according to the difference of the monitoring point positions and the difference of the flood intensity.
Furthermore, the output end of the geographic information system is connected with the input end for applying the analysis conditions, the output end of the urban building information model is connected with the input end for applying the analysis conditions, and the output end for applying the analysis conditions is connected with the input end for flood risk numerical simulation.
Furthermore, the inside of the spatial information comprises building density, water flow velocity, ground height and pressure distribution, the spatial information is obtained by utilizing the monitoring points, the number of the monitoring points is n, the monitoring points need to be displayed on the three-dimensional graph, and the warning intensity of the monitoring points needs to be distinguished according to the setting.
Further, the initial condition is a condition which is applied by the digital city model and accords with the actual existing condition, and the boundary condition is respectively from the city building information model and the geographic information system.
Furthermore, the flood risk numerical simulation also internally comprises the simulation of the whole local and building internal submerging process to obtain the change condition in the flood propelling process, and can also count the urban frequent population flowing range and measure and calculate the disaster severity of the flood tendril delay according to the population density at the position.
Furthermore, the urban building information model is based on an urban construction database, the spatial orientation of the camera is taken as several points, high-density building distribution and data are obtained, the urban building information model with complete landform is generated, and information obtained by the urban building information model also comprises information such as building strength.
Furthermore, the information obtained from the inside of the geographic information system also comprises the detection of the height of the river along the bank, so that the numerical simulation of the height of the flood is realized.
Compared with the prior art, the invention has the beneficial effects that: the method needs to collect city information including building information before use, and establishes a three-dimensional city model, so that flood influencing conditions including building strength, building density, river channel capacity and the like can be better met in the process of analyzing the city flood. When using simultaneously, can also add historical data, come the concrete analysis according to the particular case in different cities, can further improve the degree of accuracy of data like this, spatial information still including building density, velocity of flow, ground height and pressure distribution, the accurate effect of improvement analysis result that these information transmission can be better to flood risk numerical simulation's inside, also faster help simulation analysis goes out the result simultaneously.
In the use, still need the real-time location and the atress analysis of monitoring point, can mark out the comparatively alert position of flood prediction through real-time location, show flood risk intensity of catching a disaster, the person of facilitating the use avoids and evacuates, and the atress analysis part has analyzed the influence of building to the velocity of flow, so when the flood arrives, the torrent region that avoids that just can be fine when personnel evacuate, better help flood risk carries out the analysis, and practice and study, make it can be widely used.
Drawings
FIG. 1 is a schematic view of the connection principle of the present invention;
FIG. 2 is a schematic flow chart of a geographic information system according to the present invention;
FIG. 3 is a schematic view of the present invention under applied analysis conditions;
FIG. 4 is a schematic diagram of the interior of the spatial information according to the present invention;
fig. 5 is a schematic view of a flood risk numerical simulation process.
Detailed Description
The present invention will be further described with reference to the following examples.
Referring to fig. 1-5, a first embodiment:
the invention discloses a city flood risk numerical simulation analysis method based on production convergence analysis, which comprises the following steps:
the method comprises the following steps: selecting the water surface height, the runoff volume, the river width and the watershed area of a watershed in a region to be measured by using a GIS system from a geographic information system, measuring and calculating the influence of the region through which river runoff flows on a city, and measuring and calculating the water storage capacity of a plurality of different diversion riverways according to the data;
step two: building a flow database of a river basin based on urban three-dimensional image modeling, placing a plurality of monitoring devices for observing data check points, setting the monitoring points as monitoring points, synchronously uploading data, keeping the data updated, and transmitting the data to the inside of an applied analysis condition in real time;
step three: the method comprises the steps that historical building area data around a city are sampled by utilizing a city building information model, a 3D digital city model is built at the same time, space information is selected for integration, and after the integrated data, a city flood risk analysis module can be built and led into the interior where analysis conditions are applied, so that accurate data are provided for flood risk numerical simulation analysis;
step four: according to the obtained information conditions, obtaining initial conditions before product convergence in the city and boundary conditions after adding a plurality of data, establishing a complete template for product convergence analysis, selecting typical data, automatically generating production convergence data through a programming rule, adding actual data, comparing with typical parameters, and verifying;
step five: and finally, carrying out stress analysis on the input data through monitoring points distributed at multiple positions in the city, displaying a three-dimensional graph of the urban water flow trend and the water depth degree after the flood appears through other data after the stress analysis of each point in the city, identifying flood disaster risk intensity of the monitoring points on the three-dimensional graph, and prompting surrounding personnel with higher flood intensity to pay attention to avoid according to the difference of the monitoring point positions and the difference of the flood intensity.
The method needs to collect city information including building information before use, and establishes a three-dimensional city model, so that flood influencing conditions including building strength, building density, river channel capacity and the like can be better met in the process of analyzing the city flood. When using simultaneously, can also add historical data, come the concrete analysis according to the particular case in different cities, can further improve the degree of accuracy of data like this, spatial information still including building density, velocity of flow, ground height and pressure distribution, the accurate effect of improvement analysis result that these information transmission can be better to flood risk numerical simulation's inside, also faster help simulation analysis goes out the result simultaneously.
In the use, still need the real-time location and the atress analysis of monitoring point, can mark out the comparatively alert position of flood prediction through real-time location, show flood risk intensity of catching a disaster, the person of facilitating the use avoids and evacuates, and the atress analysis part has analyzed the influence of building to the velocity of flow, so when the flood arrives, the torrent region that avoids that just can be fine when personnel evacuate, better help flood risk carries out the analysis, and practice and study, make it can be widely used.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The urban flood risk numerical simulation analysis method based on the production convergence analysis is characterized by comprising the following steps of: the method comprises the following steps:
the method comprises the following steps: selecting the water surface height, the runoff volume, the river width and the watershed area of a watershed in a region to be measured by using a GIS system from a geographic information system, measuring and calculating the influence of the region through which river runoff flows on a city, and measuring and calculating the water storage capacity of a plurality of different diversion riverways according to the data;
step two: building a flow database of a river basin based on urban three-dimensional image modeling, placing a plurality of monitoring devices for observing data check points, setting the monitoring points as monitoring points, synchronously uploading data, keeping the data updated, and transmitting the data to the inside of an applied analysis condition in real time;
step three: the method comprises the steps that historical building area data around a city are sampled by utilizing a city building information model, a 3D digital city model is built at the same time, space information is selected for integration, and after the integrated data, a city flood risk analysis module can be built and led into the interior where analysis conditions are applied, so that accurate data are provided for flood risk numerical simulation analysis;
step four: according to the obtained information conditions, obtaining initial conditions before product convergence in the city and boundary conditions after adding a plurality of data, establishing a complete template for product convergence analysis, selecting typical data, automatically generating production convergence data through a programming rule, adding actual data, comparing with typical parameters, and verifying;
step five: and finally, carrying out stress analysis on the input data through monitoring points distributed at multiple positions in the city, displaying a three-dimensional graph of the urban water flow trend and the water depth degree after the flood appears through other data after the stress analysis of each point in the city, identifying flood disaster risk intensity of the monitoring points on the three-dimensional graph, and prompting surrounding personnel with higher flood intensity to pay attention to avoid according to the difference of the monitoring point positions and the difference of the flood intensity.
2. The urban flood risk numerical simulation analysis method based on production convergence analysis according to claim 1, characterized in that: the output end of the geographic information system is connected with the input end for applying the analysis conditions, the output end of the urban building information model is connected with the input end for applying the analysis conditions, and the output end for applying the analysis conditions is connected with the input end for flood risk numerical simulation.
3. The urban flood risk numerical simulation analysis method based on production convergence analysis according to claim 1, characterized in that: the space information is obtained by using monitoring points, the number of the monitoring points is n, the monitoring points need to be displayed on a three-dimensional graph, and the warning intensity of the monitoring points needs to be distinguished according to the setting.
4. The urban flood risk numerical simulation analysis method based on production convergence analysis according to claim 1, characterized in that: the initial condition is a condition which is applied by the digital city model and accords with the actual existing condition, and the boundary condition is respectively from the city building information model and the geographic information system.
5. The urban flood risk numerical simulation analysis method based on production convergence analysis according to claim 1, characterized in that: the flood risk numerical simulation comprises the steps of simulating the whole local flooding process and the building internal flooding process to obtain the change condition in the flood propulsion process, counting the flow range of urban frequent population, and measuring and calculating the disaster severity of the flood spread delay according to the population density of the position.
6. The urban flood risk numerical simulation analysis method based on production convergence analysis according to claim 1, characterized in that: the urban building information model is based on an urban construction database, high-density building distribution and data are obtained by taking the spatial orientation of the camera as several points, and the urban building information model with complete landform is generated, wherein the information obtained by the urban building information model also comprises information such as building strength.
7. The urban flood risk numerical simulation analysis method based on production convergence analysis according to claim 1, characterized in that: the information obtained from the interior of the geographic information system also comprises detection of the height of the river along the bank, and numerical simulation of the height of the flood is realized.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116822969A (en) * | 2023-08-30 | 2023-09-29 | 安徽金海迪尔信息技术有限责任公司 | Water conservancy model cloud computing method and system based on model combination |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116822969A (en) * | 2023-08-30 | 2023-09-29 | 安徽金海迪尔信息技术有限责任公司 | Water conservancy model cloud computing method and system based on model combination |
| CN116822969B (en) * | 2023-08-30 | 2023-11-17 | 安徽金海迪尔信息技术有限责任公司 | Water conservancy model cloud computing method and system based on model combination |
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