JP2004197554A - Real time dynamic flooding simulation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of a conventional hazard map which is unable to cope with real time changing data through conventional fixed information printed down on a paper map, since the information changes from hour to hour by influences of a water level and an amount of rain fall. <P>SOLUTION: In the invention, there are used a river information database 1, a flood plain database 2, an outflow analysis means 3, a river channel water-level estimation means 3a, a dam breakage point inflow computation means 4, a flooding analysis means 5, a feedback compensation means 6, a simulation display means 7, map information, address/landmark information, river information related with rainfall, and flood hazard map information in combination with a data distribution means 8 which transmits flood data automatically from a distribution server. These are automatically transmitted to a platform 9 which can utilize the Internet, personal computer communication and networks. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention is based on river information such as rainfall and water level (for example, observation data such as rainfall radar and telemeter, water level prediction data and information such as inundation depth, inundation range, and bank breakage width). By designating as an assumed breach point, inundation analysis is performed in real time, and predictions are made for several hours or days in advance, so that the latest prediction results are always provided, and the efficiency of evacuation guidance and disaster prevention activities for residents, etc. The present invention relates to a useful real-time dynamic inundation simulation system that can be used to operate, and to educate and train disaster prevention personnel, and to minimize human and physical damage caused by floods.

  The flood control law was amended in June 2001, and the country and prefectures that are river managers designated inundation assumption areas for rivers to be managed, and in response, municipalities communicated flood forecasts in regional disaster prevention plans. And evacuation information, etc., as well as publishing such information to the residents. A flood hazard map is currently being prepared as a means of publicity.

  This flood hazard map publishes various information on flood damage in an easy-to-understand style so that residents can reduce the damage caused by flood damage, and recognize the flood risk in the area where they live. It is used for the purpose of minimizing damage caused by floods by encouraging disaster prevention activities.

  Conventionally, such a flood hazard map is a static analog drawing printed on paper. In addition, a flood simulation is performed on the assumption of the planned rainfall used to calculate the basic high water flow of the river in the flooded area. Information necessary as river map data that can be described is described (for example, see Patent Document 1).

Information on this flood hazard map is used by residents in normal times to post inundated areas and evacuation sites. Information useful for emergencies and various matters related to flooding, such as 1 / 10,000 topographic maps Above, (a) Inundation information by rank, (b) Evacuation facility information, (c) Evacuation area information, (d) Hazardous location information, (e) Evacuation standards, (f) Information transmission route, (g) Evacuation Information about knowledge, (h) flood arrival time, (i) meteorological information, etc. is posted.
Japanese Patent Laid-Open No. 10-37150

  However, the above-mentioned conventional flood hazard map has information on a paper map, so although the outline of dangerous areas and evacuation routes can be understood, the actual flood is affected by water level, rainfall, etc. However, since it changes from moment to moment, conventional fixed information cannot be handled, and there is a problem that the information of individual residents is not sufficiently reflected.

  In other words, in the conventional flood hazard map, the information (a) to (d) described above is manually arranged on a paper map, and the attached information (e) to (i) is not posted in the margin. In addition, since information is fixed on such a paper map, there are problems such as being unable to respond to actual floods and inundations that change from moment to moment in actual floods. However, there are various problems in its creation and dissemination.

  In addition, in order to mitigate damage caused by water disasters, such as the process of creating a flood hazard map and lessons learned from recent disasters, such as accurate information on water disasters and ensuring smooth and prompt evacuation of residents Issues have been pointed out.

  For example, (a) Simplification of inundation calculation (inundation information) for small and medium rivers, (b) Inland flooding initiatives, (c) Disaster information initiatives other than flood inundation, (d) Underground shopping areas and vulnerable people Unification, (e) Implementation of accurate inundation survey, (f) Consistency of municipal disaster prevention plan, (g) Elimination of long-distance evacuation sites, (h) Enhancement of appropriate management and maintenance of evacuation sites, (i ) Evacuation of cars, (j) Clarification of evacuation standards, (k) Clarification of evacuation routes and ensuring safety, (l) Enhancement of support system in case of disaster, (m) Transmission of disaster prevention (flood) information Measures, (n) well-known flood hazard maps, (o) support for evacuation of vulnerable people, (p) easy-to-understand expression methods, and (q) use of computerization.

  Furthermore, in Japanese Patent Application No. 2001-368679 filed earlier by the present applicant, representative points such as important locations on the flood control of rivers or locations with a high possibility of bank breakage are selected and inundation analysis is performed. However, it is possible to prepare in advance if the bank breaks at that location, and in the unlikely event it can be dealt with without any problems, but if the bank breaks at other locations that are not expected, it can be dealt with due to insufficient preparation. Delays, human and property damage cannot be minimized.

  In addition, when the inundation situation changes greatly depending on the location of the bank breakage, there is still no means for displaying the expected inundation area for each bank breakage point and time series, and the actual work for each bank breakage point in the study of the flood hazard map There is an increasing demand to see inundated areas.

  Moreover, since there is no means for displaying the expected inundation area for each breach point and for each time series, it is necessary to prepare an output diagram for each breach point and each time series, and the number of output will be considerable. The handling of figures must also be very difficult.

  The present invention has been made in view of such conventional problems and requests. When an arbitrary bank breakage point is input, the current river information is used to perform inundation analysis and river level prediction in real time. It is possible to calculate and dynamically display the estimated inundation area for each breach point and time series, and display the results on a map, graph, or form format to create a dangerous area, safety Useful real-time to extract routes that can be evacuated, warn and contact residents in the area, and to support evacuation guidance and efficient disaster prevention activities for the residents in the area. The purpose is to provide a dynamic inundation simulation system.

  In order to solve the conventional problems as described above and achieve the intended purpose, the configuration of the present invention is to acquire a database on river information such as river channel data, hydrological data, and meteorological data, and data on flood plains. Flood plain database, runoff analysis means to predict the flow into the river, river channel water level prediction means to predict the water level at the reference point and arbitrary point of the river, and breakwater inflow to calculate the inflow at the breakwater point Inundation analysis means that conducts inundation analysis at any breach point in real time using observation data such as rainfall data and telemeters, and water level prediction data, and observation data such as inundation depth, inundation range, and levee width Feedback correction means that feeds back to the initial value of the flood analysis and corrects it to an accurate flood analysis result and / or simulation display means that dynamically displays the flood flow or Re or resides in real time dynamic flood simulation system system comprising selection or in combination.

  In addition, the river information database includes river channel data acquisition means for acquiring river channel data on the network, and hydrological data acquisition means for acquiring hydrological data on the current status, calculation of river flow rate and water level, and prediction of rainfall, etc. on the network. It is good to have.

  Further, the flood plain database preferably has flood plain data acquisition means for acquiring data relating to the flood plain on the network.

  The runoff analysis means preferably has a river inflow calculation function for calculating a flow rate flowing into the river using an estimated value or actual measured value of the upstream average rainfall or an arbitrarily set rainfall value as an index.

  Further, the river channel water level prediction means preferably has a reference point water level calculation function for calculating the water level of the reference point using the flow rate flowing into the river as an index, and an arbitrary point water level calculation function for calculating using the reference point water level as an index.

  In addition, the breach point inflow calculation means uses the breach width calculation function to calculate the river width as an index, the inflow angle of the flood to the breach point, the ground height in the levee, the external water level, and the levee height. It is preferable to have an inflow calculation function for calculating the amount and the return to the river channel.

  Further, the flood analysis means may perform real-time flood prediction using river information database and flood plain database for data on river channels and flood sources.

  The inundation analysis means may have a function of calculating an assumed inundation area for predicting an inundation area caused by internal water before a bank break occurs.

  Furthermore, it is preferable to have an inundation assumption area dynamic display means for dynamically displaying the inundation assumption area for each bank breakage point and for each time series.

  In addition, the dynamic inundation area dynamic display means includes ground height mesh data, average ground height of calculation mesh, modeling information such as continuous embankment structure, calculation condition data of each calculation mesh, inundation point location, each calculation mesh It is recommended to dynamically display the inundation area for each breach point and time series using the data of the inundation calculation result such as the calculated inundation level.

  Furthermore, the feedback correction means includes a local information feedback function that is calculated based on information from the field, a depth feedback function that is calculated from the inundation depth by the inundation sensor, and an inundation area feedback that is calculated from the inundation area based on observation data such as satellites. It is preferable to have a function and an internal water discharge amount feedback function for calculating from the discharge amount of the internal water pump.

  The feedback correction means should feed back various observation information that changes every moment at the time of the bank breakage as an initial value of the flood prediction calculation, and perform flood analysis with high accuracy.

  Furthermore, the simulation display means may have a dynamic information display function for dynamically displaying flood flow information.

  The simulation display means preferably has an animation function for animating and displaying the flood prediction result dynamically.

  Furthermore, the simulation display means processes the flood prediction result data, and displays inundation information that dynamically displays the inundation level, inundation depth, flow velocity, etc. at any point or route in the floodplain in time series. It is good to have a function.

  In addition, the simulation display means preferably has an evacuation information display function for processing the data of the flood prediction result and displaying the risk level at the arbitrary point or refuge in the flood plain, the arrival time of the flood, the evacuation start time, etc. .

  Furthermore, the simulation display means preferably has a crisis management exercise function for educating and training how river managers and disaster prevention personnel should respond in the event of a disaster.

  Preferably, the simulation display means has an evacuation behavior simulation function for displaying a safe and shortest route to the evacuation site assuming an actual situation / scene based on the data of the flood prediction result.

  Furthermore, in addition to the inland water inundation analysis function for analyzing inland water inundation by the trench method, the inundation volume in the mesh where the inland water drainage facility such as the pump facility exists, the drainage capacity of the inland water drainage facility and / or the regulating pond It is preferable to have a function of verifying the effectiveness of the inland water drainage facility / regulatory pond to calculate the amount of drainage by comparing with the water collection area and verify the drainage capacity / effect of the inland water drainage facility / regulatory pond during floods.

  In addition, the distribution of inundation levels is calculated from the amount of inundation flowing into the underground space and the observation values of inundation sensors installed in the main part of the underground space, and the underground inundation level and inundation range are predicted and information is displayed. It is good to have inundation analysis and status display functions.

  More preferably, it is preferable to have a disaster information data acquisition unit for disaster prediction or the like from a database that can search past disaster histories and similar disasters on the network.

  Moreover, it is preferable to have an evacuation action support image transmission function for issuing an information distribution and a warning as an image signal through the network to the obtained prediction results such as the inundation level, the inundation range, and the evacuation information.

  The present invention is configured as described above, and by simply inputting an arbitrary bank breakage point, it is possible to perform real-time inundation analysis and river channel water level prediction using current river information, and dynamically for each bank breakpoint. In addition to the inundation analysis that selects the representative points of the important points on the river flood control and the places where the possibility of bank breakage is high. Even if the bank breaks at other points (unexpected), it can be handled smoothly.

  In addition, by displaying the results on a map, graph, and form, extract the dangerous areas and routes that can be safely evacuated, warn and contact the residents in the area, and evacuate the residents in the area It also has the effect of being able to support efficient disaster prevention activities for guidance and dangerous places.

  In other words, (a) based on the prediction of inundation flow, it is possible to support the quick and accurate judgment of disaster prevention personnel regarding disaster prevention measures (support for effective disaster prevention measures), and (b) providing information directly to residents If the environment is established, residents can support their own judgments regarding evacuation behavior. In addition to being able to be used as a practical scenario for (c) crisis management exercises, and (d) to be used as a learning tool for disaster management personnel, it is possible to select several assumed hydrographs during normal times and flood By learning the simulation as if it were a game, the situation of flooding can be made common sense and the disaster prevention capability in case of emergency can be enhanced.

  In addition, as soon as river information such as rainfall is received, it is possible to provide information as close as possible to various flood inundation conditions as quickly and accurately as possible. Unlike the flood hazard map, it is possible to respond to actual floods and inundations that change from moment to moment without being fixed, and to deliver information accurately and in real time under various flood situations. As a result, it is effective in minimizing damage such as human life due to flood damage.

  Moreover, using the mobile phone, PHS, mobile information terminal, car navigation system, and fixed terminal platforms, you can call up the flood hazard map at any time and provide river information such as inundation to the evacuation site so that you can evacuate safely and appropriately. In addition to guiding the route of the river, river management is carried out under the consistent water system, so the amount of rainfall that falls in the basin to the river, the trend of the water level, and an indication of the possibility of flooding inside and outside the water There is an effect that it can be foreseen.

  In addition, if the risk of a disaster is forcibly notified to a mobile terminal in a hazardous area, the nearest evacuation site and route are indicated, or if the residents are not aware of the danger immediately before the disaster Disaster prevention and river information can be distributed and danger can be recognized quickly and accurately.

  In addition, since river information such as hourly rainfall, accumulated rainfall, and water level can be distributed by focusing on unit basins of appropriate size for municipalities, not only disaster prevention personnel but also the general public It is extremely effective in understanding the scope of the relationship and what you need (one-to-one) and predicting and interpreting the danger of flooding from rainfall.

  Moreover, disaster prevention officers can distribute the information necessary for the proper flood control activities from the river information such as rainfall, water level, etc., and collective information on the screen, in other words, risk of flood damage. It is extremely efficient and effective for disaster countermeasures because it has the appropriate logic and scenario to judge the nature and can deliver information that changes automatically at a constant update cycle (as short as possible) in real time. .

  In addition, the simulation display means has an evacuation behavior simulation function that displays the safe and shortest route to the evacuation site assuming the actual situation / scene based on the data of the flood prediction result, so whether evacuation is necessary. Because it is possible to perform simulations necessary for evacuation behavior, such as when to start evacuation and whether evacuation was successful, the response capability of disaster prevention related organizations has improved, and evacuation instructions at a more appropriate timing As a result, the river basin residents can evacuate safely. As a result, the loss of human lives and the number of injured persons can be reduced, and damage to property can be minimized.

  Furthermore, since it has an inland water inundation analysis function that analyzes inland water inundation at the same time as inundation analysis means, it is possible to analyze not only inundation but also inland water inundation prior to inundation. This has the effect of making accurate predictions and damage assumptions and enabling appropriate evacuation guidance instructions.

  In addition, the amount of drainage is calculated by comparing the inundation volume in the mesh where the inland water drainage facility such as the pumping facility exists and the drainage capacity of the inland water drainage facility and / or the water collection area of the adjustment pond. By having the function of verifying the drainage capacity and effects of the drainage facility / regulatory pond, it is possible to formulate a detailed disaster prevention plan that reflects the topographical characteristics and weather characteristics of the area. As a result, it is possible to reduce the damage caused by flooding of inland water.

  Furthermore, the inundation level distribution is calculated from the amount of flood water flowing into the underground space and the observation value of the inundation sensor installed in the main part of the underground space, and the underground inundation level and inundation range are predicted and information is displayed. By having the inundation analysis / status display function, it is possible to grasp the inundation status of the underground shopping mall that changes with the passage of time, so that an underground shopping mall user can evacuate safely.

  In addition, it is preferable to have a disaster information data acquisition means for disaster prediction from a database that can search past disaster histories and similar disasters on the network. Therefore, it is possible to accurately predict what kind of damage will occur in the future by combining with the simulation results.

  Furthermore, it has disaster prevention-related image transmission functions that provide information distribution and warnings as image signals to the necessary locations via the network for the prediction results of the obtained inundation level, inundation range, evacuation information, etc. As a result, it is possible to clearly communicate the inundation situation and evacuation routes that are close to crisis to local residents and tourists.

  In this way, the present invention delivers a real-time flood hazard map based on river information such as hourly rainfall, cumulative rainfall, and water level, and handles a series of runoff, flooding, and evacuation as it is, enabling various flooding situations. Not only can the information as close as possible be provided promptly and accurately, it also performs flood analysis in real time simply by specifying the assumed breakwater point of an arbitrary river, and inundation assumption areas for each dynamic breakwater point and time series In addition, it is possible to provide forecasts up to several hours ahead so that the latest forecast results can be provided at all times, so that evacuation guidance for residents and disaster management activities can be performed efficiently. Implementing the present invention has great practical value, such as training and helping to minimize human and physical damage caused by water damage.

  A database on river information such as river channel data, hydrological data, and meteorological data, a floodplain database that acquires data on floodplains, a database that can search past disaster histories and similar disasters, and an outflow that predicts the flow into rivers Analytical means, river channel water level predicting means for predicting the water level at river reference points and arbitrary points, breach point inflow calculating means for calculating the inflow at the breach point, observation data such as rainfall data and telemeters and water levels Inundation analysis means that performs real-time inundation analysis of any breach point using forecast data, inland flood analysis means that analyzes inundation at the same time as inundation analysis, inundation depth, inundation range, levee width, etc. Feedback correction means that feeds back observation data to the initial value of the flood analysis and corrects it to an accurate flood analysis result, and the amount of flood water flowing into the underground space and the ground It is equipped with means for analyzing and displaying the inundation level and inundation range of the underground space from the observation values of the inundation sensors installed in the main part of the space, and a simulation display means for dynamically displaying the inundation flow. The display means is equipped with an evacuation behavior simulation function that displays the safe and shortest route to the evacuation site assuming the actual situation / scene based on the data of the flood prediction result, and also the inundation level, inundation range, and evacuation information It is desirable to have an evacuation action support image transmission function that issues information distribution and warning as image signals at necessary locations via a network.

  Next, an embodiment of the present invention will be described with reference to the drawings. A in the figure is a real-time dynamic inundation simulation system (hereinafter simply referred to as “moving flood hazard map system”) according to the present invention. This moving flood hazard map system A relates to river information as shown in FIG. Database (hereinafter simply referred to as river information database) 1, floodplain database 2, runoff analysis means 3, river channel water level prediction means 3a, breakwater inflow calculation means 4, flood analysis means 5, and feedback correction Combining the means 6, the simulation display means 7, and the data distribution means 8 for automatically transmitting map information, address / landmark information, rain river information and flood hazard map related information from the distribution server, the Internet, personal computer Automatically distributed to platform 9 where communication and network can be used That.

  The river information database 1 corresponds to the maintenance of map data by GiS (Geographic Information System), and acquires river data on the network (a) River data acquisition means and (b) Hydrological data acquisition means It is intended to maintain river data necessary for calculating river channel water levels and displaying cross sections.

  Examples of river channel data include (a) river channel crossing data, embankment height, etc. at intervals of 200 m, (b) river channel profile data, planned high water level, critical water level, etc. be able to. In addition, longitudinal traverse / set water level data at an arbitrary point can also be represented by an HQ curve formula.

  (b) Hydrological data acquisition means corresponds to the establishment of a data management center based on the Basic Policy on Water Information National Land, and acquires hydrological data related to the current situation, calculation of river flow and water level, and prediction of rainfall, etc. on the network. is there.

  In addition, GiS (geographic information system) data has river base map data, river backbone database, river environment information map data, and basin ground environment data, and has three functions: spatial database, spatial analysis tool, and mapping tool. , Information on all maps can be integrated using the “position element” as a key.

  In addition, by associating with each other, the information integrated into the spatial database can be obtained by analyzing, for example, an area where a fire truck can reach within 5 minutes from the fire department or an evacuation route in a river basin. Inundation simulation results can be displayed and used in real time on a numerical hazard map.

  In this way, GiS data has two types of information, spatial data + attribute data, and is managed in association with each other, for example, managing river graphic data together with river names and river basin names. Can do.

  By using such river GiS data, evacuation-related maps in which residences and underground facilities are described and / or evacuation-related maps in which routes and evacuation facilities are described are displayed over the flood simulation results. Can do.

  On the other hand, the flood plain database 2 corresponds to the development of the national spatial data base and has (a) flood plain data acquisition means for acquiring data on the flood plain on the network. Such flood plain data acquisition means calculates the inundation depth from the obtained land information and is used for calculating the evacuation route. Specifically, it will prepare the flood plain elevation and land use data necessary for the inundation analysis, as well as the location and attribute data of the evacuation site necessary for studying the evacuation plan.

  The runoff analysis means 3 has a river inflow calculation function for calculating the flow rate flowing into the river using the predicted value or actual measured value of the upstream average rainfall, or an arbitrarily set rainfall value as an index.

  This river inflow calculation function, for example, calculates the average rainfall that falls within the basin by combining the created basin boundary and radar rainfall, and / or the average rainfall that will be calculated in the future by rain zone movement analysis. is there. Specifically, the average rainfall within the basin can be calculated by adding the rainfall figures (mm / hour) of the observation unit (1 km x 1 km) of the radar rain gauge located in the basin. Yes, this makes it possible to obtain basin rainfall data (basic data) necessary for municipal users.

  In addition, in order to ensure the accuracy of this river inflow calculation function, the program can calculate the average rainfall value in the basin while acquiring the rainfall data from the radar rainfall correction system (hereinafter simply referred to as corrected radar rainfall data) in real time. You may do it.

  Here, the radar rainfall correction system corrects radar rainfall data while appropriately changing the telemeter (the number of telemeter stations) according to the rainfall intensity by the calibration means.

  Specifically, based on radar rainfall data from rainfall observation means such as radar observation stations, telemeters, water levels, rainfall observation stations, etc., the rainfall data can be changed by appropriately changing the number of telemeter stations used for calculation according to the rainfall intensity. It is preferable to use a calibration means based on the dynamic window method for performing the correction, and program in combination with data distribution means for distributing the corrected radar rainfall data calculated by the calibration means to other systems.

  The generated corrected radar rainfall data is returned to the observation means by the data distribution means 8, or is connected to a communication network such as the Internet or a mobile phone network or via a GPS, a personal computer, a mobile phone, car navigation, information It is distributed in real time to platforms such as home appliances and personal digital assistants (mobile terminals).

  Moreover, by combining with such a radar rainfall correction system, the average rainfall in the basin is calculated based on the accurate radar rainfall data corrected according to the intensity of rainfall based on the rainfall measured by the telemeter and radar rain gauge. Needless to say, it can be used for a flood prediction system using radar rainfall, in addition to the actual value of radar rainfall, cumulative rainfall, and predicted rainfall by rain zone movement analysis.

  On the other hand, the river channel water level prediction means 3a consists of two models, runoff analysis and river channel indefinite flow, and it can be used for rainfalls set arbitrarily such as rainfall of major floods in the past and planned rainfall used to calculate basic high water flow. Perform runoff analysis calculations. The river level in the river channel is calculated by indeterminate flow calculation using the calculated runoff.

  Specifically, it has (a) a reference point water level calculation function and (b) an arbitrary point water level calculation function. (a) The reference point water level calculation function calculates the water level using the predicted value of the average rainfall in the upstream area as an index, and selects from a plurality of assumed patterns after the prediction time. (b) The arbitrary point water level calculation function Calculate the water level using the reference point water level as an index.

  Further, such river channel water level prediction means 3a can display rainfall information. This display of rainfall information is a display of time series data of rainfall at a designated point or a nearby point, and can be displayed by switching the same screen or a screen (including a time change in a plane precipitation map).

  In addition, as a display of the outside water level, (a) a wide area map (adding some information to the basin map of the target area, names of observation stations, bridges, national roads, towns, etc.) is preferably a bird's-eye view or a plan view of the entire water system. (b) Display the hydrograph at the specified point. It is not limited to the bank breakage point, and indicates the vicinity when there is no designated point. (c) Water level profile (including time change) is a fixed section. A specified point that is different from the specified point.

  In addition, the inundation level display (inundation range, inundation level, and inundation depth map display) is provided dynamically with an inundation area display means for each breach point and time series (hereinafter simply referred to as inundation). Assumed area dynamic display means).

  This inundation assumed area dynamic display means includes (a) ground height mesh data (elevation data of 50m mesh, etc.), (b) average ground height of calculation mesh, (c) modeling information such as continuous embankment structure, ( d) Calculation condition data of each calculation mesh (roughness coefficient, etc.), (e) Inundation point location, (f) Inundation calculation result data such as calculation inundation level of each calculation mesh, etc. In addition, the expected inundation area for each time series is dynamically displayed.

  The breach point inflow calculation means 4 calculates the flow rate that flows into the floodplain from the breach point, and calculates from the river channel water level at the breach point, the water level at the flood plain, and the width of the breach using the crossover formula. . The bank breakage width and how it spreads are based on the Public Works Research Institute manual.

  For example, the breach point inflow calculation means 4 has (a) a breach width calculation function and (b) an inflow amount calculation function. The final bank breach width is calculated using the river width as an index after verifying the prescribed manual of the Public Works Research Institute, etc. Specifically, the bank breach width necessary for calculating the runoff amount is calculated. (b) The inflow calculation function calculates the inflow taking into account the inflow angle of the flood to the breach point, the ground height in the levee, the external water level, and the levee height.

  The display of the assumed breakwater point is as follows: (a) Any point is specified by the user. The specified breakwater point should be highlighted, and the specified point is displayed at the specified position on the screen. By default, it should be centered on the screen.

  In addition, (b) The elapsed time after the bank break can be specified and displayed according to the storage status of the inundation assumed area data (10 minutes, 1 hour, etc., the minimum specified unit). Specify with etc. The maximum elapsed time on the data can also be specified.

  Furthermore, (c) continuous display up to the specified elapsed time (pseudo animation function) is also possible. For example, by clicking the “continuous display” button, the flooding status can be displayed by frame advance (pseudo animation). .

  At that time, it is better to overwrite the information displayed previously so that it will not disappear, and the frame advance speed can be adjusted. Click the “Continuous display” button again to display the inundated area. Cleared and can be redisplayed.

  When the “designated time display” button is clicked, the state of the designated elapsed time is displayed. The button is set so that it cannot be clicked until the bank breakpoint is specified.

  Furthermore, (d) it has a highlighting function when the evacuation site enters the inundation assumption area, and is highlighted when the evacuation area enters the inundation assumption area while displaying the inundation area. .

  Further, (e) a display color changing function for each inundation depth rank is provided, and the display color of the inundation depth by rank can be changed from the color palette by double-clicking the legend.

  Furthermore, (f) It has a function to change the ranking of the inundation depth, and by double-clicking the legend, the ranking of the inundation depth can be changed (example: 0m to 1m is red → 0m to 2m. Change to red).

  If there is a contradiction in the setting (double setting range, unset range, etc.), a warning is issued and the setting can be reset. The display can specify whether the evacuation target is the entire flooded area or 50 cm or deeper.

  Further, (g) it has a function of displaying a water level cross section at an arbitrary point. For example, when a user designates a plurality of points in a dike land, an underground cross section and an inundation depth are shown accordingly.

  Further, (h) a plurality of information drawn on the screen can be dragged to move the portion to an arbitrary position in the screen. This operation should be similar to moving multiple windows to the appropriate position on the desktop.

  On the other hand, the inundation analysis means 5 performs inundation analysis using the flow rate flowing into the inundation field from an arbitrary bank breakage point. As an inundation analysis method, a two-dimensional indeterminate flow that can accurately reproduce the inundation flow motion. It is a model.

  Specifically, (a) an actual calculation function for actually calculating an inundation analysis and displaying the result, (b) a calculation result display function for displaying based on a calculation result performed in advance, and (c) a new simpler function. Simple calculation function to develop inundation analysis means, (d) Inundation assumption area calculation function to predict the inundation area by inland water before the breach occurs, (e) Inland water inundation analysis function, (f) It has an effect verification function for water drainage facilities and the like, and (g) an underground street inundation analysis / status display function (see Fig. 1)

Incidentally, inundation analysis reproduces the behavior of inundation flow by numerically analyzing river breach inundation. The above-mentioned analysis is performed by quantifying inundation conditions such as river channels, dikes, floodplains, and solving the following analysis model (Equation 1).

メッシュ中の数値は、メッシュ番号を座標（（x,y））で表している。
連続の式：(1-1)

ｘ方向の運動方程式：(1-2)

ｙ方向の運動方程式：(1-3)

ここで、u,vはx,y方向の流速、hは水深、Hは水位、gは重力加速度、nは粗度係数である。

The numerical value in the mesh represents the mesh number with coordinates ((x, y)).
Continuous formula: (1-1)

Equation of motion in x direction: (1-2)

Equation of motion in y direction: (1-3)

Here, u and v are flow velocities in the x and y directions, h is the water depth, H is the water level, g is the gravitational acceleration, and n is the roughness coefficient.

  In the inundation analysis of the present invention, the exchange of water between meshes is tracked by the above formula. Moreover, the weight of each term of Formulas (1-2) and (1-3) differs depending on the topographical characteristics of the floodplain and the behavior of the flood flow, and there are terms that can be omitted in the calculation. In this inundation analysis, a “two-dimensional indeterminate flow model” is adopted in which no terms are omitted.

Examples of the data for performing the flood analysis include the following (a) river channel data, (b) flood plain data, and (c) the cross-sectional shape of the embankment.
(a) River channel data The flood waveform is a time series of changes in the river channel level due to flooding. In general inundation calculations, the water level and discharge at the breach point can be obtained by one-dimensional indeterminate flow calculation or broken. If flow hydro at the embankment point is given, it is often calculated in terms of water level.
(b) Floodplain data Ground height is given as an average value for each mesh, such as survey values and values read from topographic maps. In addition, the embankment models the embankment of high-standard roads and small river (waterway) embankments and controls the behavior of the flood flow. Land use is controlled by giving a roughness coefficient in general because the behavior of the inundation flow differs depending on land use differences such as urban areas and fields.
(c) Cross-sectional shape of levee In order to obtain the overflow rate when a breach occurs, conditions such as levee water level, levee height, and breach width are given. Note that this system uses the formula of the Public Works Research Institute for the bank breakage width.

  In addition, for the flood simulation example (image), analysis results are often given as numerical values. Therefore, in this model, the numerical values are divided into color depths for each inundation depth. (Display by color).

  In addition, in the inland area, there is a possibility of inundation due to the amount of rainfall before the levee break, but the current inundation area map does not fully consider such inland water phenomenon. In view of the fact that inland flooding also affects the evacuation behavior of residents, such inundation analysis means 5 was added in the dynamic flood hazard map.

As described above, the flood analysis means 5 can perform real-time flood prediction on the river channel and the flood source using the river information database and the flood plain database. Hereinafter, the basic specifications of the flood analysis means 5 are shown in [Table 1].

  The feedback correction means 6 has (a) a local information feedback function, (b) a water depth feedback function, (c) a flooding area feedback function, and (d) an inland water discharge amount feedback function.

  (a) The local information feedback function is calculated based on information (observation data) from the local area, (b) the water depth feedback function is calculated from the inundation depth by the inundation sensor, and (c) the flood area feedback function is artificial Calculated from the flooded area based on observation data from satellites, etc. (d) The internal water discharge feedback function calculates from the discharge of the internal water pump.

  (A) The local information feedback function can be calculated considering not only observation data but also image data taken with a digital camera, PDF, etc., and (b) water depth feedback function. Incorporates inundation and inundation depth information (including underground malls) from inundation sensors as well as inundation sensors and automatically draws the contents of the map on a map, along with a real-time inundation map (areas, locations, and depths) May be provided.

  The inundation map is drawn automatically on the background map with elevation data based on the position of the inundation and inundation sensors and the observation results. Needless to say, it is possible to make corrections based on information from local residents and fixed camera images. A schematic diagram of the feedback function employed in the feedback correction means 6 is as follows.

(Explanation of symbols)
i step: _{T i} stage of the simulation to the starting point at the time T _i: absolute time t: on the calculation time

0 (T _i ) = (r (T _i ), H (T _i ), h (T _i ), B (T _i ), P (T _i ) ...)
Observation data at T _i r (T _i ): Rainfall from T _i-1 to T _i H (T _i ): Outside water level at T _i h (T _i ): Inner water level at T _i (inundation) Raw water level)

S _i : Initial state in i step W _i : Flooding state in simulation in i step W _i = (r _i (t), H _i (t), h _i (t), B _i (t),...)
H _i (t): outside water level at time t in i-step simulation
same as below

α: Scheduled reproduction time (assuming 10 minutes)
ε ₁ : Time required to collect the observation site ε ₂ : Necessary to recalculate W _i-1 (T _i ) based on 0 (T _i ) and S _i-1
And the bank breakage width is changed from B (T _i-1 ) to B (T _i )
To do.
S _i is calculated using W _i-1 (T _i ) based on ε ₃ : 0 (T _i ) and (T _i ).
Ε = ε ₁ + ε ₂ + ε ₃ : Time required for feedback
δ: Time required for inundation analysis

  For example, the items of the feedback function described above include inundation depth, inundation range, bank breakage width, and drainage amount of the internal water pump. The inundation depth and bank breakage width depend on information from the local area, but by installing an inundation sensor in the floodplain, online information can be collected, and feedback on the inundation range, etc., can be obtained from observation data from artificial satellites. It can be done.

  The simulation display means 7 dynamically displays the result of the inundation analysis calculation, and displays the spread of the flood water and the inundation depth with the passage of time for each bank breakage point. It goes without saying that detailed inundation information and evacuation information can be displayed by processing the calculation result data.

  In other words, a flood area that includes the estimated overflow and breach point is assumed based on separately measured levee shape data, planned high water flow rate, or flood prediction information. The topographical and elevation data obtained from the above-mentioned topographical observation means are combined and analyzed, and based on the result of the analysis, the state of flooding can be predicted in real time, and the state is visualized using the river GiS data. It can be visually recognized.

  Specifically, the observation data from sensors, etc. are fed back to the flood simulation, various information that changes every moment is input and recalculated, and simulation and prediction calculation are performed with high accuracy. Information display function, (b) animation function, (c) disaster prevention support function, (d) crisis management exercise function, (e) inundation information display function, (f) evacuation information display function, (g) evacuation site availability determination Functions, (h) ground height display function, (i) ground height coloring display function, (j) main facility information function, (k) simple printing function, (l) evacuation behavior simulation function, (m) evacuation behavior support image transmission It has a function.

  (a) The dynamic information display function uses GiS (geographic information system) data to dynamically display the flow of the inundation flow, and basic data for determining the basin risk necessary for users such as municipalities. Can be displayed.

  In addition, (b) the animation function is to dynamically display the prediction result of flooding and make it easy for disaster prevention personnel to understand.

  In addition, (c) the disaster prevention activity support function determines either or both of dangerous areas and safe evacuation routes, issues warnings / contacts to residents in the area, and facilitates evacuation guidance for residents in the area. At the same time, support is provided to ensure implementation, and support is provided to enable efficient disaster prevention activities at dangerous locations.

  Specifically, it is possible to experience 2D and 3D simulations of assumed inundation simulations, provide evacuation methods, etc. for flooded hazard maps and inundation assumption wide area maps that have already been created and announced for places where residents are located and arbitrary locations. Provide browsing information.

  The (d) crisis management exercise function educates and trains how river managers and disaster prevention personnel should respond in the event of a disaster.

  In addition, (e) Inundation information display function processes flood prediction result data, and displays the inundation level, inundation depth, flow velocity, etc. at an arbitrary location or route on the floodplain in a time series and dynamically. To do.

  In addition, (f) the evacuation information display function can display various attributes such as a name and the number of people that can be accommodated. On the screen, a circle with a radius of 2 km is displayed so as to be a reference when making an evacuation plan. This circle should appear and disappear when clicked.

  Further, (g) the evacuation site availability determination function is devised so that information for determining whether the evacuation site is inundated or whether it can be used (whether or not to evacuate there) appears on the screen. For example, how many hours will the flood flow come? Which direction are you going? Which of the designated evacuation sites can be used and which cannot be used? Evacuation site specifications and whether or not the evacuation site is flooded and the depth Is it possible to stay in a temporary shelter or stay? Display which block residents will evacuate. In addition, the population for each block and the number of people requiring assistance should be displayed.

  Furthermore, (h) the ground height display function can confirm the ground height at an arbitrary place. As the display of the ground height, the ground height at the position of the mouse cursor is displayed together with the longitude and latitude.

  Further, (i) the ground height coloring display function can display a place where the altitude is lower than an arbitrary point with a color. For example, when an arbitrary point is double-clicked, a portion lower than the point is colored according to the ground height from the ground height data.

  Furthermore, (j) the main facility information function can display the position and specification data of the main facility created when the flood hazard map and the inundation area map are created. For example, clicking on a mark on the map makes it possible to display data attributes.

  In addition, (k) the simple print function can print the displayed screen with the specified paper size, together with the name of the bank post and the elapsed time after the bank break. In addition, a print preview can be viewed before printing, and an area that enters the paper (even outside the screen display area) can be printed with the center of the displayed screen as the center of the paper.

  In addition, this system is equipped with inundation assumed area dynamic display means that uses the data that has already been calculated for inundation analysis when creating the inundation assumed area map, selects the assumed breach point, and dynamically displays the inundation status.

  The dynamic display means of this inundation assumed area includes (a) ground height mesh data (elevation data of 50m mesh, etc.), (b) average ground height of calculation mesh, (c) modeling information such as continuous embankment structures, (d) Calculation condition data of each calculation mesh (roughness coefficient, etc.), (e) Inundation point location, (f) Inundation calculation results such as calculation inundation level of each calculation mesh are stored as data.

  By using such data, the inundation area map for each breach point and time series is displayed, but this inundation area map is a composite of the maximum inundation area and the maximum inundation depth at all assumed breach points. Therefore, in reality, it is conceivable that an actual breach occurs near the assumed breach point, and once the breach occurs, the downstream water level usually drops, so all the expected breach points will break. Because the entire municipality has entered the inundation area and the evacuation site cannot be set outside the inundation area, or the inundation situation may vary greatly depending on the breakwater location. The expected inundation area for each point and time series is dynamically displayed.

  Therefore, the dynamic display means of the assumed inundation area is not only used as a flood hazard map, but can also be effectively used for crisis management exercises in charge of municipal disaster prevention during normal times. For reference, the image of the assumed inundation area for each breach point and time series is shown in Figs.

  This image of the assumed inundation area shows the assumed breakwater points 10, 10 ... with crosses (see Fig. 2 (1)). By designating an arbitrary assumed breakwater point 10, the breakwater 10 The flooded area after the minute is displayed (see Fig. 2 (2)), 30 minutes after the bank break (see Fig. 2 (3)), 60 minutes after the bank break (see Fig. 3 (1)), 90 minutes after the bank break (See Fig. 3 (2)) The flooded area can be identified and displayed, and the location of the evacuation shelter that entered the flooded area is highlighted. In the figure, the asterisk (*) indicates the shelter 11.

Figure 4 is a simulation image every time, represents the observation location required flood analysis at a real time, in the real time T _i-2, to flood the analysis result that W _i-2, the real time In T _i−1 , when a new observation value comes in, it is fed back to the initial value of the inundation analysis and represents the inundation analysis result W _i−1 (hereinafter, T _i , T _{i + 1).} , T _{i + 2} ...

The actual time span of T _i -T _i-1 is 10 minutes, which is the update span of the observation data, and the inundation analysis calculation is performed every 10 minutes. A single calculation needs to be completed in the last 10 minutes, with the goal of making predictions up to 48 hours later.

  Further, as shown in FIG. 5, this simulation system includes a real-time flood prediction means 12, and in the course of actual flooding, future flooding based on the water level data and flooding status up to the present time. It predicts the situation and can be used for real-time disaster prevention measures and evacuation actions for the flooding that occurs.

  Therefore, since this real-time flood forecasting predicts the future that has not yet occurred in the course of flood flooding, it has significant responsibility for the forecast results, so the forecast is as accurate as possible. Every effort should be made to ensure that it is consistent, and at least it must be carried out with corrections that are consistent with known observations obtained by the time the prediction is made.

  For this reason, every time observation data is collected, the inundation analysis result is corrected (feedback) to match the observation data collected up to that point, and the subsequent prediction (inundation calculation) is made using that as the starting point. Is what you do. Needless to say, this calculation must be carried out by the river manager who manages the river.

  On the other hand, based on the result information analyzed by the application server, the data distribution unit 8 creates hydrometeorological information such as rainfall water level, evacuation guidance support information, etc. as output screens suitable for each purpose, and outputs the Internet and / or Alternatively, it has a function of delivering to the platform 9 via the high-speed network 30.

  Further, it is preferable to perform an input / output transaction process in which an application server is requested to search for information in response to a request from the platform 9 and the result is received and distributed to the platform side.

  Incidentally, the application server consists of radar rainfall observation means, terrain observation means, telemeter observation means, optical fiber observation means, inland flooding observation means, area specifying means, location, which constitute observation means for observing weather conditions such as rainfall It has a function of acquiring and analyzing various data from a combination of all or any of the specific detection means and the imaging means.

  For example, data on rivers, geographic information from the IKONOS satellite, rain area and rainfall intensity information from radar rainfall observation means, information such as rainfall and river level from telemeter observation means, optical fiber laid in the river area It is desirable to have an application that collects and analyzes information on bank deformation from sensors.

  The platform 9 is a fixed terminal (for example, a personal computer, car navigation, other information home appliances capable of mail or the Internet), mobile / mobile information, etc. that can be used via the communication network 30 such as the Internet, personal computer communication, mobile phone network, or GPS. It consists of a selection or combination of terminals (including a mobile phone / PHS).

  The high-speed network 30 connecting the platform 9 and the distribution server uses all or selected ones such as a public line, a dedicated line, an optical fiber line, a microwave line, satellite communication, satellite broadcast, and CATV network. For example, in the case of a car navigation system, it is possible to obtain road information, road flood information, and the like in the destination direction using GPS and satellite communication.

  On the other hand, although the screen display basic functions are not shown in the figure, (a) the sub window display has functions such as enlargement, reduction, scrolling, panning, redrawing, and scale zooming, and it can be seen where in the overall view is displayed. Or, the whole view is displayed so that it fits in the screen by the whole display button.

  Incidentally, the enlargement / reduction function can specify a fixed magnification (2 ×, 4 ×, etc.) and an arbitrary magnification for the background. In addition to drag scrolling, the scroll function automatically scrolls when the mouse is brought to the edge of the screen. The pan function moves to the center of the screen when double-clicked on the screen. The redrawing function refreshes the current display screen and redraws. This is a function that sometimes rewrites so-called garbage that accumulates unnecessary past drawings while information is repeatedly accumulated. The scale zoom function is to display the scale by inputting or selecting a predetermined scale.

  In addition, (b) by supporting a plurality of points on the screen, the cross section, distance, and area by designating the range are displayed. The cross section includes ground height, inundation level, inundation depth, etc. If possible, the horizontal scale should be correct. If it is not possible, it is better to put it on the display to make it easier for the viewer to understand, such as 50m mesh units. The area is for grasping the flood area.

  The data used in the moving flood hazard map system of the present invention includes, for example, (a) rainfall data, (b) outside water level data, (c) inundation analysis data for each breach point and time series (inland water level). Data, mesh data or contour data, assuming that it is stored as data when creating the inundation area map), (d) facility data (point data: evacuation sites, public facilities, hospitals, etc.), (e) background Base map data (raster or vector data), (f) Estimated breakwater location data (point data), (g) Ground height data (grid data), (h) River structure data (vector data: levees) , Xiamen, Xiamen, pumping stations, observation stations, etc.), (i) town chome data (polygon data), population (town chome or detailed data in the range obtained), but limited to these is not.

  Hereinafter, as a model example of the moving flood hazard map system of the present invention, for example, the Shonai River will be described with reference to FIGS.

  In the figure, 21 is a GiS mesh database, 22 is a river channel specification database, 23 is a flood prediction database, 24 is a calculation / flow rate database, 25 is an inundation calculation database, 26 is an inundation calculation result database, and 27 is an existing water level database, 28 is an existing hydro database, and 29 is a hydro database (see FIGS. 10 to 12).

  Normally, the time required for inundation analysis when creating an inundation area map is calculated up to 48 hours after the bank break, so it takes several hours per case, although it depends on the size of the floodplain. However, predictions are made up to 48 hours ahead, and the results are displayed. In addition, as new flood analysis is updated every 10 minutes, new predictions are sequentially updated. The overall scheme of this real-time dynamic inundation analysis system is shown in FIG.

  Further, FIG. 7 shows a system configuration diagram of the simulation system. The water level calculation 13 and the flood calculation 14 are separately performed. The water level calculation 13 is always performed (every 10 minutes, 24 hours), and the flood calculation 14 is performed according to a user instruction.

The data that the real-time flood simulation needs to acquire and adjust from the existing system is as follows.
(A) The Shonai River Flood Forecast 15 system (see Fig. 7) covers the direct section of the Shonai River and Yada River. As real-time data, for example, (a) The time (undefined flow calculation section), (b) the flow rate and water level at the Shonai River reference point / inflow point, and the time (storage function method calculation section). The time when the calculation is performed is set as the output reference time.

  Furthermore, as other data 16, for example, (a) flow rate data (HQ equation coefficient used for water level calculation), (b) river channel cross-sectional shape data (XY coordinate) used for flow rate calculation, (c) River channel cross-sectional characteristic data (H-AR relationship), (d) River channel roughness coefficient used for discharge calculation.

(B) The Shinkawa flood forecasting system covers the section from Kuchino to the estuary and does not consider tributaries (handling of inflow). As the real-time data, for example, (e) the Shinkawa distance standard position flow rate / water level and its time can be cited, and similarly, the time when the calculation is performed is set as the output reference time. As other data, for example, (f) River channel cross-sectional shape data (XY coordinate) used for flow calculation, (g) River channel cross-sectional characteristic data (H-AR relationship), (h) River channel roughness coefficient Can be mentioned.

  Incidentally, as shown in FIG. 8, the real-time data is a separate file for each river, and the flow rate file 17 and the water level file 18 are divided into text data. Incidentally, data such as other HQ expressions, cross-sectional shape data, and roughness coefficient are also text data.

  FIG. 9 shows an image of the i / F format (water level and discharge) with the flood prediction 15 system. This is provided with an absolute time column 19 and a point (point) column 20, and the output format when N points are points that can be calculated by the flood prediction system (reference points, inflow points, unsteady flow calculation points, etc.). Data is generated every 10 minutes.

In addition, the system functions of this inundation model example have at least the following functions: (1) a function related to the water level in the river channel of the flood prediction result, (2) an inundation calculation function, and (3) a screen display function.
(1) Functions related to the river level in the flood prediction results
(a) Function to receive Shonai River flood forecast results. Receives flood forecast results implemented in the Shonai River.
(b) Shinkawa flood forecast reception function Receives flood forecast results implemented in Shinkawa.
(c) Flood forecast calculation function at intervals of 200m Based on the results predicted above, river channel water level prediction at intervals of 200m will be implemented at the Shonai River Kashiwajima upstream site and Shinkawa Kujino upstream site. Note that a one-dimensional indeterminate flow model is used as the prediction model.

(2) Inundation calculation function
(a) Water level reference function at an arbitrary point Refers to the water level at an arbitrarily assumed point based on the results received and predicted in "Functions related to river water levels in flood prediction results".
(b) Hydrograph creation function It has a function to create a hydrograph for 48 hours based on the predicted water level.
(c) Inundation calculation execution function Inundation calculation is performed when an arbitrarily assumed point breaks. The time should be 10 hours, and it should be tuned so that the calculation is completed within 10 minutes.

(3) Screen display function
(a) Display function by GiS This system displays calculation results using GiS (geographic information system) data. The software to be used is to select appropriate software according to the specifications.
(b) Base chart display function. The base chart to be used is a map of about 1 / 25,000, and the display performance is compared and examined according to the type of map data to be used.
(c) Enlarging / reducing function It is possible to enlarge / reduce an arbitrary point.
(d) Movement display function The displayed screen can be moved in any direction up, down, left or right.
(e) Population distribution display function Population distribution can be displayed based on population data input in advance, and the display method is the same as that of mesh display.
(f) Evacuation site display function Displays the evacuation site designated by Nagoya City and does not display facilities that cannot be evacuated.
(g) Evacuation route display function Displays the evacuation route from any point in Nagoya City to the nearest evacuation site.
(h) Hazardous area display function It displays dangerous areas such as landslides designated by Nagoya City.
(i) Main organization display function The main organizations such as river managers, disaster prevention organizations and lifelines are displayed.

(4) Display function of river crossing map at arbitrary point The crossing map of the point arbitrarily selected by the client is displayed. In addition to the crossing map, the flood forecast results from the current time to 3 hours ahead and after 3 hours are displayed on the display screen. The water level prediction of the water will be displayed.

(5) Display function of simulation results The simulation results are displayed by reproducing the calculation results up to 48 hours later.

  As a hazard map display means, the flood hazard map is automatically distributed and displayed on the terminal screen of the relevant municipality etc. at the same time as the evacuation is issued. By complementing the paper-based flood hazard map, information can be displayed. It is defined as a digitized (electronic) tool for the purpose of quick and accurate transmission, and in preparing digital flood hazard map data, the work execution guidelines, data file specifications, and By defining detailed rules for data acquisition criteria by item, the data format and file format are unified.

  The flood hazard map should be created by the following method. First, as a process, an arbitrary point is selected as an assumed breakwater point in consideration of the planar shape of the river, the flow ability, the point where the bank has broken in the past, etc. (first step). Next, the inundation flow is calculated based on the river width at the assumed breach point and the specific height between the water level predicted at the time of flooding and the ground in the levee (second step). In the inundation analysis, the inundation depth is calculated by flowing down the inundation flow into the embankment divided into meshes (third step). The expected inundation depth is obtained in units of meshes, and according to the degree of the inundation depth, the mesh is color-coded to create a predicted inundation depth map for each rank (fourth step). Next, a contour map is created. This contour map is created by connecting the points where the inundation depth is equal by subtracting the ground height at each point in the mesh from the assumed deep water level obtained by adding the average ground height in the mesh to the assumed inundation depth. (5th process). Next, a flood hazard map is created by adding various types of information such as evacuation locations to the rank-specific inundation depth map created by coloring between the contour lines (sixth step).

  In the moving flood hazard map system of the present invention, the flood hazard map data created in this way is digitized (digital flood hazard map data) and unified by the data format and file format as described above. Is called a “real-time hazard map”, and further, the above-described feedback correction means and simulation display means are added so that the flood flow and its prediction result can be dynamically displayed with high accuracy.

  The moving flood hazard map system of the present invention configured as described above simply inputs an arbitrary bank breakage point, uses current river information, calculates flood analysis and river channel water level prediction in real time, It is possible to dynamically display the estimated inundation area for each breach point and time series, and by displaying the results on a map, graph, or form format, it is possible to evacuate safely in a hazardous area. Routes can be extracted and warnings / communications can be made to the residents in the area, and as a result, evacuation guidance for the residents in the area and efficient disaster prevention activities for dangerous places can be supported.

  In addition, it is possible to provide inhabitants with easy-to-understand information on the inundation status and evacuation areas during floods, and it is possible to scrutinize necessary functions and information in real time before, during and after a disaster. it can. In particular, since it deals with runoff, flooding, and evacuation based on river information such as rainfall, it is possible to provide information that is as close as possible to the various flood inundation conditions quickly and accurately, and changes from moment to moment. Deliver accurate and real-time information under various flooding conditions, and can minimize damages such as human lives due to floods.

  In addition, mobile phone, PHS, mobile information terminal, car navigation and fixed terminal platforms, flood hazard maps can be called at any time, river information such as inundation is provided, and a route to the evacuation site is also provided so that safe and appropriate evacuation is possible. Since it can be guided, its profit is enormous.

  In addition, forcibly notify the danger of a disaster to a mobile device in a hazardous area, indicate the nearest evacuation site and route, or if the residents are not aware of the danger immediately before the disaster Disaster prevention and river information can be distributed and danger can be recognized quickly and accurately.

  In addition, focusing on the basin of an appropriate size for areas such as municipalities and special wards, river information such as hourly rainfall, cumulative rainfall, and water level is also delivered in real time, so not only disaster prevention personnel, For the general public, it is extremely effective to understand the scope of their relationship and the information necessary for them (one-to-one) and to predict and interpret the risk of flooding from rainfall.

  In particular, it is extremely reassuring for disaster prevention officers that the necessary information is automatically distributed when the weather forecast and warning specified in the flood control plan is issued. Is expensive. Needless to say, this is convenient not only for ordinary people who are not aware of disasters, but also for those who are vulnerable to disasters, such as the elderly, in the recent aging society.

  In addition, since disaster prevention personnel include generalists as well as specialists, not only numerical and graph information, but also support and commentary information with reference to flood warnings, flood forecasts, etc. are also delivered in a timely manner. In this way, flood control activities and evacuation activities can be performed accurately, which is extremely effective.

  In addition, considering the case where all relevant information cannot be communicated, the information to be communicated is a system in which the user can obtain detailed (relevant) information by himself / herself by first communicating the main points and calling attention. May be.

  In addition, the unit basin can be displayed on the screen based on the national land numerical information published by the Geospatial Information Authority of Japan or the latest numerical map (KS-270, KS-271, KS-272, KS-273) data. Basin information is centrally managed, enabling output of basin information to a file and display of information on the screen.

  Incidentally, such numerical map data is obtained by converting the coordinates of the boundary line of the unit basin into numerical values, and is not a polygon, and cannot be combined or separated in this state. , 000 unit basins were polygonized.

  As a result, it is possible to easily create an indispensable basin boundary and develop it on a nationwide scale, such as being able to work in 10-30 minutes per basin, using a numerical map of the Geographical Survey Institute as basic data.

  Next, the evacuation behavior simulation function will be described with reference to FIGS. A first stage of searching for an evacuation route from each mesh to an evacuation site, a second stage of deploying the evacuation route of the evacuation route search to a mesh system, and a third stage of determining whether or not to evacuate using the mesh system evacuation route; It is composed of

(a) First stage Node link system (N & L system) evacuation route search For each mesh i, each evacuation site n (i, j) is limited to 10 evacuation routes R ( Search for i, j, k). The priority order j = 1... Jmax (i) .ltoreq.3, k = 1.

The contents of the evacuation route R are a starting point (mesh center), a node including an arrival point (the evacuation site), an interpolation point, and a link (see FIG. 14).
R = {N ₀ ... N _a ... N _amax , L ₁ ... L _amax }

  In addition, since the first stage and the second stage are static data to be determined if the inundation simulation model is set, the first stage and the second stage are performed before the inundation simulation is performed and obtained after the end of the second stage. The result is stored as data of the inundation simulation model itself, and the evacuation behavior simulation is performed in response to the result of the inundation simulation.

(b) Second stage Deploying node link evacuation route to mesh system
_{R = {h max: N 0} ... N 1 ... N h, N hmax}
N ₀ : Center point of evacuation mesh required N _h : Node including interpolation point N _hmax : Evacuation site

FIG. 14 is a flowchart showing a mesh-based evacuation route.
Q = {l _max : Q ₀ , Q ₁ , Q ₂ ... Q _l , Q _lmax−1 , Q _lmax }
Q ₀ = N ₀ Q _l = (x _l , y _l : r _l , i _l ) Q _lmax = N _kmax
r _l = distance between Q _{0 and} Q _l i _l = mesh number between Q _{l-1 and} Q _{l For} the intermediate point (α, β) between the starting point and the new boundary point, (INT (α−x ₀ ) / Δ) · Δ + x ₀ and (INT (β−y ₀ ) / Δ) · Δ + y ₀ ).

Also, it is shown in FIGS. 15 to 17 the flowchart for determining the interaction between the mesh boundary between the starting point _{N 0,} a target point _{N 1.} In FIG. 16, the starting point (x ₀ , y ₀ ), the target point (y _a , y _b ), the next boundary point candidate (α _s , β _s , f _s ), S = 1 to 4, f _s : It is set as a flag indicating whether or not the point is on the boundary line (+1: present, -1: not present).
In this connection, l: latest boundary point number, l _max : maximum value, rl: cumulative distance between Q _{0 to} Q _l , il: mesh number at l point, r: addition distance.
FM (x) = INT (x−x ₀ ) / Δ) · Δ + x ₀ ), JM (x) = INT (x−x ₀ ) / Δ), IM (x, y) = {(JM (x), JM (y)) mesh serial number}

(c) Third stage First, an evacuation behavior simulation is performed using a mesh-based evacuation route. As shown in FIGS. 18 to 19, the inaccessible start time in TW (i): i-mesh is calculated prior to the evacuation behavior simulation every time the inundation simulation is performed.

  Next, FIG. 20 shows a flowchart in the case where the evacuation start time is individually given to determine whether or not it is possible, and FIG. 21 shows the operation procedure of the evacuation behavior simulation.

  As types of maps to be output, as shown in FIGS. 22 to 23, as a map after the completion of hydraulic calculation, a maximum water depth map 31, a flood arrival time map 32, a maximum risk map 33, and a flooding time map 34, an assumed damage map 35 (see FIG. 22), and maps after execution of the simulation after evacuation include a limit evacuation start time map 36 and an evacuation allowance time map 37, evacuation route information 38, critical point hydro 39, The mesh hydro 40 and the water level profile 41 on the evacuation route can be shown in animation (see FIG. 23).

  As shown in FIG. 24, the evacuation behavior simulation operation / display screen includes a condition setting input field 42, a simulation execution input field 43, and a work screen 44. The evacuation area, the priority of evacuation, and the safety of the evacuation route are provided. Screens can be displayed in accordance with conditions such as the city boundaries 46, evacuation shelters 47, evacuation areas / evacuation routes 48 on the basic map 45 as needed (FIG. 25). reference).

ここにＱ_ｔ：トレンチ流量
ｎ：粗度係数(コンクリート滑面相当として０．０１３と仮定）
Ｒ：径深
Ｉ：路床勾配(メッシュ間の平均地盤高による勾配)
路床勾配については、下水道の流下を視野に入れて考えた場合、流れの方向が 常時同じ方向となるように、以下のように取り扱っている。
・平均地盤高による勾配が発生する場合：平均地盤高による勾配を路床勾配と して与える。
・平均地盤高による勾配が発生しない場合：路床勾配は１／１０００を仮定し 、方向については水位の高い方から低い方への流量として与える(この時の 水位は一つ前の時間ステップの値を用いている)
Ｂ：トレンチ幅(ここでは１．２ｍを想定)
ｈ：トレンチ内の水深 Next, the inland flood analysis function will be described. This inland water inundation analysis function analyzes the inland water inundation by the trench method simultaneously with the analysis calculation by the two-dimensional indeterminate flow method. For the mesh with the water channel (trench), each of the x direction and y direction Calculate the flow rate for the water channel (trench) by equal flow calculation.

Where Q _t : trench flow rate n: roughness coefficient (assuming 0.013 as equivalent to concrete smooth surface)
R: Depth I: Subgrade gradient (gradient due to average ground height between meshes)
The roadbed slope is handled as follows so that the direction of flow is always the same when considering the sewer flow.
・ When a gradient due to the average ground height occurs: The gradient due to the average ground height is given as the road bed gradient.
・ When the gradient due to the average ground height does not occur: Assuming the roadbed gradient to be 1/1000, the direction is given as the flow from the high water level to the low water level. Value is used)
B: Trench width (assuming 1.2m here)
h: Water depth in the trench

ここにＶ＝ｈ・Δｘ・Δｙ：メッシュの氾濫水のボリューム
［トレンチ］

ここにＶｔ：メッシュの氾濫水のボリューム
Ｑｔｘ、Ｑｔｙ ：ｘ方向、ｙ方向のトレンチ流量 Next, the volume of each mesh is solved by a two-dimensional continuous formula from the x-direction and y-direction fluxes of the flood flow. At this time, the continuous type is the following continuous type of volume.
[Inundation flow]

Where V = h · Δx · Δy: mesh flood water volume [trench]

Here Vt: Volume of mesh flood water
Qtx, Qty: Trench flow rate in x direction and y direction

尚、水路は基本的に下水分と考え盛土があった場合、この盛土の下を流れるものとする。また、表面流は盛土の影響を受けるが、内水伝播は盛土の影響を受けないため、盛土で氾濫流が遮断されない場合がある。内水伝播のトレンチをモデル化した配置(トレンチ配置図)を図２６に示す。 The total flood volume V + Vt calculated by the upper equation is converted into water depth using a mesh HV relational expression.

In addition, a water channel shall flow under this embankment when there is embankment considered that it is basically moisture. In addition, the surface flow is affected by the embankment, but the propagation of internal water is not affected by the embankment, so the flood flow may not be blocked by the embankment. FIG. 26 shows an arrangement (trench arrangement diagram) in which a trench for propagation of internal water is modeled.

  Next, the effect verification function of the inland water drainage facility / regulatory pond will be described. By calculating the amount of drainage by comparing the inundation volume in the mesh where there is an inland water drainage facility such as a pumping facility with the drainage capacity of the inland water drainage facility and / or the water collection area of the adjustment pond, It is possible to verify the drainage capacity and effects of water drainage facilities / regulatory ponds.

ここに、Δｔ：計算時間刻み(今回のケースでは２秒)

(ｂ)Ｖ＞Ｑ_ｍａｘ の場合(メッシュ内の浸水を排水できない場合)

この場合には、当該メッシュがＶ−Ｑ_ｍａｘ Δ^ｔ の分だけ浸水していることとなる。
The internal water drainage facility is handled as follows.
(1) For inland water drainage facilities, for example, in the case of Shonai River and Shinkawa, only pumping stations that drain internal water to each river are handled.
(2) and flooded volume V in mesh inner water exclusion facility is present, by comparing the case of drainage capacity Q _max of internal water elimination facilities, it computes the occasional wastewater P as follows.
(a) When V ≦ Q _max (when water in the mesh can be drained)

Where, Δt: calculation time step (2 seconds in this case)

(b) When V> Q _max (when the water in the mesh cannot be drained)

In this case, the mesh is submerged by the amount of _{VQ max} ^Δt .

  Next, the inundation analysis and status display function for the underground shopping mall will be described. It calculates the inundation level from the inundation amount flowing into the underground space and the observation value of the inundation sensor installed in the main part of the underground space, and predicts and displays information on the inundation level and inundation range in the underground. It is possible to grasp the inundation situation of the underground shopping area that changes with the passage of time.

  Next, disaster information data acquisition means will be described. It is possible to retrieve past disaster history and similar disasters from a database on the network and obtain data related to disaster prediction, etc. Data on river channels and flooding sources described above in real time using river information database and floodplain database A more precise flood forecast can be made in conjunction with the flood forecast.

  In addition, the information such as the flood level, flooding range, and evacuation information obtained are sent as image signals to the necessary locations via the network, and information is delivered and warnings are issued. It can be confirmed visually (evacuation action support image transmission function).

  In addition, a river data database includes river channel data acquisition means for acquiring river channel data on the network, and hydrological data acquisition means for acquiring current data, calculation of river flow rate, water level, etc. and prediction of rainfall, etc. on the network. The latest information necessary for inundation analysis can be obtained when necessary.

  In addition, since the flood plain database has flood plain data acquisition means for acquiring data related to the flood plain on the network, necessary information relating to evacuation such as flood analysis and evacuation routes can be obtained.

  The moving flood hazard map system of the present invention configured as described above can perform real-time inundation analysis at any assumed breach point using observation data such as rainfall radar and telemeter, and water level prediction data, as well as sequential distribution. By providing feedback from the observed data, the latest prediction results can always be provided, and safe and appropriate evacuation routes and evacuation sites can be guided.

  In addition, the river channel water level prediction means has a reference point water level calculation function that calculates the water level of the reference point using the flow rate flowing into the river as an index, and an arbitrary point water level calculation function that calculates using the reference point water level as an index. River management will be carried out under consistency, and the information related to the place where you are, such as hourly rainfall, accumulated rainfall, and water level, focusing on the basin unit, and the information necessary for your place will be clarified, It is possible to provide information that is extremely important in predicting the risk of the risk. In particular, it can provide information (water level trends, inland flooding possibility) that overlaps radar rainfall, etc., which covers the whole country, and is pinpointed for areas such as municipalities that require river information. You can foresee the danger.

  In addition, the breach point inflow calculation means uses the breach width calculation function to calculate the river width as an index, the inflow angle of the flood to the breach point, the ground height in the levee, the external water level, and the levee height. By having an inflow amount calculation function for calculating the amount and the return amount to the river channel, the amount of water in the river channel and the amount of water flowing out to the outside can be calculated.

  In addition, the inundation analysis means predicts the inundation area by inland water before the levee breaks, by performing real-time inundation prediction using river information database and inundation field database for data on river channel and inundation source. Simulation of inundation analysis can be performed by having an inundation area calculation function.

  Furthermore, it has inundation assumption area dynamic display means for dynamically displaying the inundation assumption area for each breach point and for each time series. As a result, such inundation assumption area dynamic display means includes ground height mesh data. , Using modeling information such as average ground height of calculation mesh, continuous embankment structure, calculation condition data of each calculation mesh, expected flood location, calculation inundation level of each calculation mesh, etc. By dynamically displaying the estimated inundation area for each breach point and time series, inundation can be predicted in real time, and where is it and how dangerous (state)? Is it dangerous (trends)? Can be seen in an instant.

  In addition, the feedback correction means the local information feedback function that is calculated based on the information from the field, the depth feedback function that is calculated from the inundation depth by the inundation sensor, and the flood area feedback that is calculated from the inundation area by observation data such as artificial satellites. By having the function and the internal water discharge amount feedback function that is calculated from the discharge amount of the internal water pump, the flood calculation can be performed more accurately than in the past.

  In addition, the feedback correction means feeds back various observation information that changes every moment at the time of the bank breakage as the initial value of the flood prediction calculation, and by performing flood analysis with high accuracy, the flood situation can be grasped quickly and accurately. .

  Further, the simulation display means has a dynamic information display function for dynamically displaying the flow of the inundation flow, so that basic data for determining the risk level of the basin necessary for a user such as a municipality can be obtained.

  Furthermore, the simulation display means has an animation function that animates and dynamically displays the prediction result of the flooding, and facilitates the understanding of the people involved in disaster prevention. Respond quickly when it occurs, minimizing damage to human life and property.

  In addition, the simulation display means processes inundation prediction result data, and inundation information display that dynamically displays the inundation level, inundation depth, flow velocity, etc. at any point or route in the floodplain in time series By having the function, it is possible to visually recognize the risk of flooding at an arbitrary point and arbitrary route.

  Furthermore, the simulation display means processes the data of the flood prediction result, and has an evacuation information display function for displaying the risk level at the arbitrary point or refuge in the flood plain, the arrival time of the flood, the evacuation start time, etc. Forcibly notify the danger of a disaster to mobile terminals etc. that exist in a dangerous area, indicate the nearest evacuation place and evacuation route, or forcibly if the residents are not aware of the danger immediately before the disaster Disaster information and river information can be distributed to recognize danger, and evacuation sites and routes that can be moved on foot can be displayed, and evacuation routes and the like other than evacuation sites can be searched.

  In addition, the simulation display means has a crisis management exercise function to educate and train how river managers and disaster prevention personnel should respond in the event of a disaster. You can have a simulated experience on the terminal screen to prepare for normal times and what happens if a flood occurs in the place where you live.

  The moving flood hazard map system of the present invention is not limited to this embodiment and model example, and can be freely designed and modified within the scope of the object of the present invention. To be included.

  For example, the moving flood hazard map system of the present invention creates or changes a large basin boundary, a middle basin boundary, and a small basin boundary necessary for determining the risk of flood disaster for each municipality, special ward, etc. In addition, a map operation function for displaying a map or a topographic map of a scale suitable for each basin size may be added, and (a) a map disclosure function for opening a map, and (b) a unit basin boundary on the map. And an attribute display function for displaying attribute information such as rivers and rivers, (c) a terrain display function for displaying a topographic map as a background, and (d) a background display function for reading commercially available map data as a background.

  The data item acquired from the real-time hazard map is polygon data of “inundation area boundary”, and information such as inundation depth assumed as attribute data is added. In addition, as a drawing showing the area where inundation is expected, there is the above-mentioned “flood inundation area map”, etc. In areas where flood hazard maps have not been created, it is also possible to use these to obtain data It is.

  Incidentally, although the present embodiment mainly describes the flood hazard map system that moves, it is not limited to this, and it can be applied as a hazard map of, for example, earthquake, storm surge, tsunami, etc. Both are included in the moving flood hazard map system of the present invention.

The “river information” referred to in this specification is a selection or combination of at least all or any of the information (a) to (f) described below.
(a) Rainfall in the basin is collected in a water network distributed in a dendritic manner in the basin, and the collected water is continuously recessed from the surrounding topography, or a river channel as a space surrounded by a dike Various facilities (radar rain gauges, rainfall observations) that observe the phenomenon as a physical quantity of the phenomenon of flowing down to the sea by rain or the rain phenomenon, runoff phenomenon, and flowing phenomenon at all times such as during normal water and flooding All information obtained at a station, water level observatory, etc.).
(b) Information about various facilities and all information that changes in chronological order as a product of artificial acts affecting spills and discharges of dams, dikes, catchment weirs, etc.
(c) All information that changes spatially and in time series about the distribution of flood inundation caused by malfunction or destruction of facilities.
(d) Spatial and time-series changes in the distribution and status of inundation and inundation caused by staying without being eliminated smoothly due to the rainfall in the basin and the topographical characteristics of the basin All information.
(e) All information that changes in space and time series about flood prevention activities and flood control activities carried out for the purpose of deterring and controlling flooding and flooding.
(f) For the purpose of reducing damage to property and its structure accumulated as a result of the protection of the lives of living and existing human beings and living organisms and social activities in the basin by flooding, flooding and flooding All information on damage mitigation actions, including warning actions, evacuation actions to be taken, and news reports to trigger those actions.

It is explanatory drawing which shows the main functions of the real-time dynamic flood simulation system which concerns on this invention. It is explanatory drawing which shows the image of the inundation assumption area for every breach point of the same real-time dynamic inundation simulation system according to time series, and Fig. 2 (1) is an assumed breach point display diagram showing the display of the assumed breach point, 2 (2) is an assumed bank breakage designation diagram showing the inundation area 10 minutes after the bank break, and FIG. 2 (3) is an assumed bank breakage designation diagram showing the inundation area 30 minutes after the bank break. Fig. 3 (1) is an assumed bank breakage designation diagram showing a flooded area 60 minutes after the bank break, and Fig. 3 (2) is an assumed bank breakage designation diagram showing the flooded area 90 minutes after the bank break. It is explanatory drawing which shows the simulation image for every time passage of the real-time dynamic flood simulation system. It is explanatory drawing which shows the structure of the real-time flood prediction means used with the real-time dynamic flood simulation system. It is explanatory drawing which shows the whole scheme of the real-time dynamic flood simulation system. It is explanatory drawing which shows the main structures of the real-time dynamic flood simulation system. It is explanatory drawing which shows the structure of the data file (real-time data file) acquired from the past system. It is explanatory drawing which shows the image of the i / F format (water level and discharge) with the flood forecasting system, and the output format when the point that can be calculated (reference point, inflow point, unsteady flow calculation point, etc.) is N point It is shown. It is explanatory drawing which shows the real-time dynamic flood simulation system at the time of flooding. It is explanatory drawing which shows the real-time dynamic flood simulation system at the time of a disaster. It is explanatory drawing which shows the main system structures of the real-time dynamic flood simulation system. It is explanatory drawing which shows the whole image of the real-time dynamic flood simulation system. It is explanatory drawing which shows the mesh type | system | group evacuation route of an evacuation action simulation function. It is a flowchart which calculates | requires the intersection with a mesh boundary between a starting point and a target point with an evacuation action simulation function. It is a flowchart which calculates | requires the intersection with a mesh boundary between a starting point and a target point with an evacuation action simulation function. It is a flowchart which calculates | requires the intersection with a mesh boundary between a starting point and target points with an evacuation action simulation function. It is explanatory drawing which shows a limit evacuation time by the evacuation action simulation performed using a mesh type | system | group evacuation route. It is a flowchart which shows the limit evacuation time of the evacuation behavior simulation. It is a flowchart which shows the case where the evacuation start time is given separately and the possibility is determined. It is a flowchart which shows the operation procedure of evacuation action simulation. It is explanatory drawing which shows the kind of map output after completion | finish of hydraulic calculation. It is explanatory drawing which shows the kind of map output after execution of evacuation action simulation. It is explanatory drawing which shows the display screen of evacuation action simulation operation. It is explanatory drawing which shows an evacuation area, an evacuation route, an evacuation center, a municipality boundary, and a basic map. It is a trench arrangement | positioning figure used by a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 River information database 2 Floodplain database 3 Runoff analysis means 3a River channel water level prediction means 4 Breakwater inflow calculation means 5 Flood analysis means 6 Feedback correction means 7 Simulation display means 8 Data distribution means 9 Platform 10 Assumed breakwater points 11 Evacuation Place 12 Real-time flood forecasting means 13 Water level calculation 14 Flood calculation 15 Flood forecast 16 Data 17 Flow file 18 Water level file 19 Absolute time column 20 Point (point) column 21 GiS mesh database 22 River channel specification database 23 Flood forecast database 24 Calculation / Discharge database 25 Inundation calculation database 26 Inundation calculation result database 27 Existing water level database 28 Existing hydro database 29 Hydro database 30 High-speed network 31 Maximum Depth map 32 Flood arrival time map 33 Maximum risk map 34 Flooding time map 35 Expected damage map 36 Limit evacuation start time map 37 Evacuation allowance time map 38 Evacuation route information 39 Critical point hydro 40 Mesh hydro 41 Water level on evacuation route Longitudinal section 42 Condition setting input field 43 Simulation execution input field 44 Work screen 45 Basic map 46 Municipal boundary 47 Evacuation area 48 Evacuation area / evacuation route i Mesh serial number j Evacuation area selection priority k Evacuation route number l Route point in the evacuation route Number m Shelter serial number n Evacuation order x Abscissa y Axis r Distance t Time R Evacuation route P (i) Evacuated population EM (m) Maximum shelter capacity E (m) Maximum shelter capacity HM (i) Maximum Water level HDM (i) Maximum inundation depth HP (i, t) Evacuation judgment hydraulic quantity (reference value HPs ta)
HQ (i, t) Evacuation route safety confirmation judgment hydraulic quantity (reference value HQsta)
TS (i) Evacuation start time TE (i) Evacuation end time TW (i) Inaccessible start time Q (i, j, k) Evacuation route TR (i) Evacuation allowance time TF (i) Flood arrival time MI (i, j) Shelter function IN (n) nth mesh evacuation number FN (i) flag indicating whether or not evacuation is necessary FS (i) flag indicating whether or not evacuation was successful jr (i) use evacuation Ranking mr (i) Use evacuation center number kr (i) Use evacuation route number lc (i) Critical point number on the same route

Claims (23)

Database on river information such as river channel data, hydrological data, and meteorological data, flood plain database for obtaining data on flood plains, runoff analysis means for predicting the flow into rivers, river reference points and water levels at arbitrary points River channel water level prediction means for predicting river breach point, breach point inflow calculation means for calculating breach point inflow, observation data such as rainfall data and telemeter, and water level prediction data for inundation analysis at any breach point Inundation analysis means that performs in real time, feedback correction means that feeds back observation data such as inundation depth, inundation range, and bank breakage width to the initial values of the inundation analysis to correct the inundation analysis results, and inundation flow dynamically Real-time dynamic inundation simulation characterized by selecting or combining all or any of the simulation display means displayed on System. The river information database has river channel data acquisition means for acquiring river channel data on the network, and hydrological data acquisition means for acquiring hydrological data on the current status, calculation of river flow rate and water level, and prediction of rainfall, etc. on the network. The real-time dynamic flood simulation system according to claim 1, wherein: The real-time dynamic flood simulation system according to claim 1, wherein the flood plain database has flood plain data acquisition means for acquiring data on the flood plain on the network. The runoff analysis means has a river inflow calculation function for calculating a flow amount flowing into the river using an estimated value or actual measured value of an upstream average rainfall or an arbitrarily set rainfall value as an index. The described real-time dynamic inundation simulation system. The river channel water level prediction means has a reference point water level calculation function for calculating the water level of the reference point using the flow rate flowing into the river as an index, and an arbitrary point water level calculation function for calculating using the reference point water level as an index. Item 2. The real-time dynamic inundation simulation system according to item 1. The breach point inflow calculation means includes the breach width calculation function that calculates the river width as an index, the inflow angle taking into account the inflow angle of the flood to the breach point, the ground height in the levee, the external water level, and the levee height, The real-time dynamic inundation simulation system according to claim 1, further comprising an inflow amount calculation function for calculating a return amount to the river channel. 2. The real-time dynamic inundation simulation system according to claim 1, wherein the inundation analysis means performs real-time inundation prediction using data on river channels and inundation sources using a river information database and an inundation field database. 2. The real-time dynamic inundation simulation system according to claim 1, wherein the inundation analysis means has an inundation assumption area calculation function for predicting an inundation area by inland water before a bank break occurs. The real-time dynamic inundation simulation system according to claim 1, further comprising an inundation assumption area dynamic display unit that dynamically displays an inundation assumption area for each bank breakage point and for each time series. Inundation assumption area dynamic display means is: ground height mesh data, average ground height of calculation mesh, modeling information such as continuous embankment structure, calculation condition data of each calculation mesh, estimated flood location point, calculation inundation of each calculation mesh 10. The real-time dynamic inundation simulation system according to claim 9, wherein the inundation assumption area for each bank breakage point and each time series is dynamically displayed using the data of the inundation calculation result such as the position. The feedback correction means include a local information feedback function that is calculated based on information from the local area, a water depth feedback function that is calculated from the inundation depth by the inundation sensor, and an inundation area feedback function that is calculated from the inundation area based on observation data such as satellites. The real-time dynamic inundation simulation system according to claim 1, further comprising an internal water discharge amount feedback function that calculates from the discharge amount of the internal water pump. The real-time dynamic flooding according to claim 1, wherein the feedback correction means feeds back various observation information that changes every moment at the time of the bank breakage as an initial value of the flood prediction calculation, and performs flood analysis with high accuracy. Simulation system. 2. The real-time dynamic flood simulation system according to claim 1, wherein the simulation display means has a dynamic information display function for dynamically displaying flood flow information. The real-time dynamic flood simulation system according to claim 1, wherein the simulation display means has an animation function for animating and dynamically displaying a flood prediction result. The simulation display means processes the data of the flood prediction result, and has a flood information display function that dynamically displays the flood level, flood depth, flow velocity, etc. at any point or route in the flood plain in a time-series and dynamic manner. The real-time dynamic inundation simulation system according to claim 1, comprising: The simulation display means has an evacuation information display function for processing the data of the flood prediction result and displaying the degree of risk at the arbitrary point or evacuation site of the flood plain, the arrival time of the flood, the evacuation start time, etc. The real-time dynamic flood simulation system according to claim 1. 2. The real-time dynamic inundation simulation system according to claim 1, wherein the simulation display means has a crisis management exercise function for educating and training how river managers and disaster prevention personnel should respond in the event of a disaster. The simulation display means has an evacuation behavior simulation function that displays a safe and shortest route to the evacuation site assuming an actual situation / scene based on the data of the flood prediction result. The described real-time dynamic inundation simulation system. 2. The real-time dynamic inundation simulation system according to claim 1, further comprising an inland water inundation analysis function for analyzing inland water inundation simultaneously with inundation analysis means even before a bank break occurs. The amount of drainage is calculated by comparing the inundation volume in the mesh where the internal water drainage facilities such as pumping facilities exist with the drainage capacity of the internal water drainage facility and / or the water collection area of the adjustment pond, and the internal water drainage facility during floods 2. The real-time dynamic inundation simulation system according to claim 1, further comprising an internal water drainage facility for verifying the drainage capacity and effect of the adjustment pond and an effect verification function of the adjustment pond. Inundation analysis to the underground street that predicts the inundation level, inundation range, etc. in the basement and displays information based on the inundation level distribution based on the amount of flood water flowing into the underground space and the observation value of the inundation sensor installed in the main part of the underground space The real-time dynamic inundation simulation system according to claim 15, further comprising a status display function. The real-time dynamic inundation simulation according to claim 1, further comprising disaster information data acquisition means for acquiring data relating to disaster prediction from a database capable of searching past disaster history and similar disasters on a network. system. An evacuation action support image transmission function for issuing information distribution and warning as an image signal to a necessary location via a network on a prediction result of the obtained inundation level, inundation range, evacuation information, etc. The real-time dynamic flood simulation system according to 1.

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