JP2017201243A - Water immersion realtime predictor, water immersion realtime prediction method and water immersion realtime prediction program, and recording medium readable by computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide water immersion realtime prediction contributing to quick determination of timing of evacuation at the time of immersion and a heading direction and the like.SOLUTION: A water immersion realtime predictor includes: a topographic data storage section 22 for holding topographic data; a water level arithmetic section 31 which predicts a present water level and a water level after a predetermined time for each place, based on weather data acquired by a weather data acquisition section 10 and topographic data called from the topographic data storage section 22; and a display section 40 having a map display area 41 to display a map in a specific region, where the display section 40 includes a water immersion risk indication body 42 which displays a water immersion risk indicating a risk degree of water immersion, in a manner of superimposed on the map display area 41, with respect to an arbitrary position in the map displayed on the map display area 41 from the present water level calculated by the water level arithmetic section 31, and a time fluctuation indication body 43 for displaying time fluctuation of a water level or a water immersion risk from a water level after lapse of a predetermined time calculated by the water level arithmetic section 31.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inundation degree real-time predicting device, an inundation degree real-time prediction method, an inundation degree real-time prediction program, and a computer-readable recording medium that can predict inundation due to heavy rain in real time and display a prediction result on a map.

  Inundation damage due to guerrilla heavy rain, which is thought to be caused by abnormal weather in recent years, is a concern in various places, and securing safe evacuation routes is an issue. In recent years, the use of big data has been screamed in various fields, and research on real-time prediction of water levels based on meteorological data is underway as an effective example. For example, in order to predict inundation and inundation due to heavy rain in real time, ground data such as elevation in the prediction area stored in advance and the actual rainfall (analytical rainfall) in the past few hours from the current time In addition, an inundation prediction system that predicts the possibility of flooding and inundation depth in an area based on rainfall data such as rainfall (short-term rainfall forecast) predicted to fall in the next few hours is known. In the conventional inundation prediction system, the predicted area is divided into a plurality of sections of several tens of meters to several hundreds of squares, and the average value of the ground surface data in each section is used for calculation. For example, the disaster prediction system of Patent Document 1 divides the predicted area into 500 m square sections, and calculates the inflow and outflow amounts of water between the sections. In this disaster prediction system, the inundation risk of each section based on the inundation depth predicted as described above is displayed in a color-coded manner on a map. In addition, this disaster prediction system displays, as a curve graph, the temporal change of the soil rainfall index indicating how much rain has accumulated as the amount of moisture in the soil in a specific section. It is said that this graph can be used to predict whether or not the inundation depth will increase in the section in the future. The prediction result by such a prediction system can be browsed via an information device such as an Internet terminal, and the system user can use this prediction result to determine the necessity of evacuation, a safe evacuation route, etc. .

Japanese Patent No. 5537883

  However, in the real-time prediction based on the conventional weather data as described above, the display is limited to the prediction of the accumulated rainfall and the remaining amount from the past, and the user side is responsible for the government issuing the evacuation instruction or actually evacuating. From the viewpoint of the residents who do this, it is not always easy to immediately link these information to the judgment of behavior such as evacuation. In other words, knowing in what direction in the future, for example, whether the water level will go up in a more dangerous direction, or if the water level will go down if you wait for a while, not only the evacuation route but also the timing of evacuation actions etc. There was a problem of difficulty.

  The present invention has been made in view of such a conventional background, and one of its purposes is to improve the visibility of the user and to predict the degree of inundation in real time that contributes to quick determination of the timing of evacuation and the direction to go. It is an object to provide a device, a flooding degree real-time prediction method, a flooding degree real-time prediction program, and a computer-readable recording medium.

Means for Solving the Problems and Effects of the Invention

  According to the inundation degree real-time prediction apparatus according to the first aspect of the present invention, the meteorological data acquisition unit for acquiring meteorological data, the topographic data storage unit for holding topographic data, and the meteorological data acquisition unit include Based on the acquired weather data and the terrain data called from the terrain data storage unit, the current water level, a water level calculation unit that predicts the water level after a predetermined time for each location, and a map of a specific area are displayed. A display unit having a map display area, wherein the display unit is calculated by the water level calculation unit for any position in the map displayed on the map display area so as to overlap the map display area. When the water level or the inundation risk level is determined from the inundation risk indicator for displaying the inundation risk level indicating the inundation risk level from the current water level and the water level after the predetermined time calculated by the water level calculation unit. It can be provided and the time variation indicator for displaying the variation. With the above configuration, not only the current inundation risk level but also the water level and the inundation risk level after the elapse of a predetermined time can be confirmed. It can also contribute to the formulation of evacuation routes from the viewpoint of disaster prevention.

  In addition, according to the inundation degree real-time prediction apparatus according to the second aspect, the water level fluctuation direction indication indicating whether the time fluctuation indicator is in a direction in which the water level rises or falls after a predetermined time has elapsed. Can have a body.

  Furthermore, according to the real-time inundation degree prediction apparatus according to the third embodiment, the water level fluctuation direction finger

  Furthermore, according to the inundation degree real-time prediction apparatus according to the fourth aspect, when the water level fluctuation direction indicator changes in the direction in which the water level rises, it changes in the direction in which the water level falls in the upward arrow direction. Can be configured to display each with a down arrow.

  Furthermore, according to the inundation degree real-time prediction apparatus according to the fifth embodiment, the water level fluctuation direction indicator can be configured to display a dot shape when the water level does not change.

  Furthermore, according to the real-time inundation degree prediction apparatus according to the sixth aspect, the water level fluctuation direction indicator can display the amount of change in the water level by the length of the arrow.

  Furthermore, according to the real-time inundation degree prediction apparatus according to the seventh aspect, the water level fluctuation direction indicator can display the amount of change in the water level with the thickness of the arrow.

  Furthermore, according to the real-time inundation degree prediction apparatus according to the eighth embodiment, the water level fluctuation direction indicator can display the amount of change in the water level in the color of the arrow.

  Furthermore, according to the flooding degree real-time prediction apparatus according to the ninth aspect, the terrain data held in the terrain data storage unit can include a ground surface model. With the above configuration, real-time prediction of the degree of inundation using the ground surface model becomes possible. Even without using a drainage model, real-time prediction of practical inundation level is possible even with analysis of the ground surface model alone.

  Furthermore, according to the real-time inundation degree prediction device according to the tenth embodiment, the ground surface model can be held in the terrain data storage unit in units obtained by dividing a map by 5 m to 25 m mesh.

  Furthermore, according to the inundation degree real-time prediction apparatus according to the eleventh embodiment, the drainage channel model indicating the drainage capacity information at an arbitrary position is further superposed on the topography data held in the topography data storage unit. A drainage channel data storage unit, and the water level calculation unit includes the meteorological data acquired by the meteorological data acquisition unit, the topographical data held in the topographical data storage unit, and the drainage channel data storage unit According to the drainage model held, the water level after a lapse of a predetermined time can be calculated in consideration of drainage capacity.

  Furthermore, according to the inundation degree real-time prediction apparatus according to the twelfth aspect, the display time adjustment for adjusting the predetermined time after the elapse of the water level or the inundation risk displayed by the time change indicator is further provided. By having the slider, the display of the water level or the risk level in the map display area can be changed in conjunction with the operation of the display time adjustment slider.

  Furthermore, according to the flooding degree real-time prediction apparatus according to the thirteenth aspect, the display unit can display a time variation indicator on the flooding risk indicator.

  Furthermore, according to the inundation degree real-time prediction apparatus according to the fourteenth aspect, the display unit can simultaneously display the inundation risk indicator and the time variation indicator on one screen.

  Furthermore, according to the inundation degree real-time prediction apparatus according to the fifteenth aspect, the display unit displays the inundation risk indicator and the time variation indicator at each position in the corresponding map in an overlapping manner, and The time variation indicator can be displayed in a size corresponding to the mesh of the flooding risk indicator.

  Furthermore, according to the flooding degree real-time prediction apparatus according to the sixteenth aspect, the display unit can display the time variation of the water level or the flooding risk displayed by the time variation indicator as an animation.

  Furthermore, according to the flooding degree real-time prediction apparatus according to the seventeenth aspect, the display unit can further include an advertisement display area.

  Furthermore, according to the inundation degree real-time prediction apparatus according to the eighteenth aspect, the display unit can further comprise a rainfall graph display area for displaying a rainfall graph.

  Furthermore, according to the real-time inundation degree prediction apparatus according to the nineteenth aspect, the display unit further overlaps the map display area to display a school display function for displaying a school position, and drainage for displaying a drainage station position. At least one of a machine area display function, a shelter display function for displaying the position of the shelter, and a walking difficulty level display function for displaying a difficulty level of walking can be provided.

  Furthermore, according to the inundation degree real-time prediction apparatus according to the twentieth aspect, the water level calculation unit can be configured to predict the water level after a predetermined time for each place by the graphics processing unit. With the above configuration, it is possible to perform a high-speed calculation such as a change in the water level, and it can be updated in real time.

  Furthermore, according to the inundation degree real-time prediction apparatus according to the twenty-first aspect, the display unit further superimposes on the map display area and indicates a water flow direction instruction indicating an arrow indicating a horizontal direction of water flow at an arbitrary position. The body can be included. With the above configuration, in addition to the vertical direction in which the water level changes, the moving direction in which water flows in the horizontal direction is also displayed, which can contribute to the planning of evacuation routes and evacuation plans.

  Still further, according to the real-time inundation degree prediction method according to the twenty-second aspect, the inundation degree real-time prediction method for predicting the inundation degree based on the meteorological data and the topographic data, each acquiring the meteorological data and the topographic data. And a step of predicting the water level after a predetermined time for each location based on the acquired meteorological data and the topographic data, and being calculated by the water level calculation unit overlaid on the map display area of the display unit And a step of displaying the inundation risk at a corresponding location from the water level and further displaying the time fluctuation of the inundation risk.

  Furthermore, according to the real-time inundation degree prediction program according to the twenty-third embodiment, a predetermined time based on the function of acquiring weather data, the function of retaining terrain data, the acquired weather data, and terrain data. A function for predicting the subsequent water level for each location, a function for displaying the inundation risk level at the corresponding location from the water level calculated by the water level calculation unit over the map display area of the display unit, and the inundation risk level The function of displaying the time variation of the computer can be realized in the computer.

  Furthermore, a computer-readable recording medium or a stored device according to the twenty-fourth aspect stores the above program. CD-ROM, CD-R, CD-RW, flexible disk, magnetic tape, MO, DVD-ROM, DVD-RAM, DVD-R, DVD + R, DVD-RW, DVD + RW, Blu-ray (registered) Trademark), HD DVD (AOD), and other magnetic disks, optical disks, magneto-optical disks, semiconductor memories, and other media that can store programs. The program includes a program distributed in a download manner through a network line such as the Internet, in addition to a program stored and distributed in the recording medium. Furthermore, the stored devices include general-purpose or dedicated devices in which the program is implemented in a state where it can be executed in the form of software, firmware, or the like. Furthermore, each process and function included in the program may be executed by computer-executable program software, or each part of the process or hardware may be executed by hardware such as a predetermined gate array (FPGA, ASIC), or program software and hardware. It may be realized in a form in which partial hardware modules that realize some elements of the hardware are mixed.

It is a block diagram which shows the inundation degree real-time prediction apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the network-connected flooding degree real-time prediction system. It is an image figure which shows the user interface screen of the flooding degree real-time prediction program which turned ON the flooding danger level time change in the flooding danger level display mode between 3:00 and 4 o'clock on August 9, 2014. It is an image figure which shows the user interface screen of the inundation degree real-time prediction program which turned on the inundation danger degree time fluctuation | variation in August 9th, 2014 from 5:00 to 6:00 in the inundation danger degree display mode. It is an image figure which shows the user interface screen of the inundation degree real-time prediction program which turned on the inundation danger degree time fluctuation | variation in the inundation danger degree display mode between 9:00 and 10:00 on August 9, 2014. It is an image figure which shows the user interface screen of the inundation degree real-time prediction program which turned on the inundation danger degree time fluctuation | variation in August 9th, 2014 from 10:00 to 11:00 in the inundation danger degree display mode. It is an image figure which shows the user interface screen of the inundation degree real-time prediction program which turned on the inundation danger degree time fluctuation | variation in August 9th, 2014 from 11:00 to 12:00 in the inundation danger degree display mode. Infiltration real time that displayed the rainfall amount graph when the block at the left end of the middle of the map display area was selected in the inundation risk display mode from 8 to 9 on August 9, 2014. It is an image figure which shows the user interface screen of a prediction program. From 8:00 to 9:00 on August 9, 2014, the inundation risk time fluctuation is set to OFF in the inundation risk display mode, and the rainfall graph is displayed when the right block is selected from the left end of the middle of the map display area. It is an image figure which shows the user interface screen of the inundation degree real-time prediction program. It is an image figure which shows the user interface screen of the flood degree real-time prediction program made into the rainfall amount display mode between 5:00 and 6:00 on August 9, 2014. It is an image figure which shows the user interface screen of the flood degree real-time prediction program made into walking difficulty level display mode between 14:00 on August 9, 2014, and 15:00. It is an image figure which shows the user interface screen of the inundation degree real-time prediction program which turned off the inundation danger degree time fluctuation in the inundation danger degree display mode and turned on the facility display function between August 8th and 9th, 2014. It is a schematic diagram which shows a flooding direction display. It is a model enlarged view of the display screen of the inundation degree real-time prediction device concerning another embodiment of the present invention. It is a model enlarged view of the display screen of the inundation degree real-time prediction device concerning another embodiment of the present invention. It is a block diagram which shows the flood degree real-time prediction apparatus which concerns on Embodiment 2. FIG. It is a schematic diagram which shows the relationship between a ground surface model and a drainage channel model. It is a graph which shows the rainfall waveform made into object. It is a drainage system diagram of the target area. 20A is a calculation result of the inundation depth according to the first embodiment, FIG. 20B is an image diagram illustrating the calculation result of the inundation depth according to the second embodiment, and FIG. 20C is an image diagram illustrating the calculation result of the inundation depth according to the third embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below is an example for embodying the technical idea of the present invention, and the present invention is not limited to the following. Further, the present specification by no means specifies the members shown in the claims to the members of the embodiments. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in the embodiments are not intended to limit the scope of the present invention unless otherwise specified, and are merely explanations. It is just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.

The connection between the real time prediction device for flooding used in the embodiments of the present invention and computers, printers, external storage devices and other peripheral devices for operation, control, display, and other processing connected thereto is, for example, IEEE1394, RS-232x, RS-422, RS-423, RS-485, serial connection such as USB, parallel connection, or electrical or magnetic via a network such as 10BASE-T, 100BASE-TX, 1000BASE-T And optically connect to communicate. The connection is not limited to a physical connection using a wire, but may be a wireless connection using a wireless LAN such as IEEE802.1x, Bluetooth (registered trademark), other radio waves such as NFC, infrared rays, optical communication, or the like. Furthermore, a memory card, a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like can be used as a recording medium for exchanging data or storing settings. In addition, in this specification, the inundation degree real-time prediction device is used to include not only the inundation degree real-time prediction device main body but also a inundation degree real-time prediction system in which peripheral devices such as a computer and an external storage device are combined.
(Embodiment 1)

  FIG. 1 shows a flooding degree real-time prediction apparatus 100 according to Embodiment 1 of the present invention. The inundation degree real-time prediction apparatus 100 shown in this figure calculates the inundation risk level in an area based on topographic data and weather data in a certain prediction area, and displays it on a map. Here, the predicted area refers to the entire area where the presence / absence of inundation, the inundation risk, etc. are predicted by the inundation degree real-time prediction device 100. The range of the predicted area is not particularly specified. The range of the predicted area can be arbitrarily determined by the system user within the target area, and can be, for example, a specific municipal unit.

The inundation degree real-time prediction apparatus 100 can be configured by installing a real-time inundation degree real-time prediction program in a general-purpose or dedicated computer, in addition to the dedicated hardware. The inundation degree real-time prediction apparatus 100 includes a data acquisition unit 10, a data storage unit 20, a calculation unit 30, a display unit 40, and an operation unit 50.
(Data acquisition unit 10)

  The data acquisition unit 10 is a member for acquiring data from the outside. Here, it functions as a weather data acquisition unit that acquires weather data. The weather data is typically rainfall data. Weather data is acquired via a network. This makes it easy to update to the latest information sequentially. Therefore, the data acquisition unit 10 has a communication function for connecting to a specific network via a general-purpose network line such as the Internet or a dedicated line.

  Rainfall data includes analysis rainfall in the forecast area and short-term precipitation forecasts. Here, the analyzed rainfall is the rainfall that has actually fallen within a predetermined time in the past from the current time. The short-term precipitation forecast is the amount of rain that is expected to rain within a predetermined time from the current time. In the present embodiment, the predetermined time is set every hour.

  For example, the rainfall data distributed by the Meteorological Business Support Center is distributed every 30 minutes with the predicted rainfall up to 6 hours ahead of the range obtained by dividing the analysis rainfall and the short-term precipitation forecast from the topographic data by 1 km mesh. Therefore, the meteorological data acquisition unit 10 sequentially acquires such data and sends it to the calculation unit 30. The weather data captured by the weather data acquisition unit 10 can be held in the data storage unit 20. For example, the data storage unit 20 may be provided with a weather data storage unit 21 that holds weather data.

The collection destination of the rain data is not particularly specified. For example, the rain data distributed by the Japan Meteorological Agency or the Meteorological Service Support Center may be used, or the rain data may be collected directly by installing a unique rain observation device. The predetermined time is not limited to one hour, and may be a shorter time (for example, 30 minutes) or a longer time (for example, two hours).
(Data storage unit 20)

  The data storage unit 20 is a member for holding various data. For example, the terrain data storage unit 22 that holds the terrain data is used. The terrain data holds height information at each position on the map. For example, it includes information such as elevation and slope of each section in the predicted area. The position on the map can be managed with data partitioned in a mesh shape.

  Here, the section is defined as a section obtained by dividing the predicted area into a 5 m square pattern. In the first embodiment, the 5 m square range is further combined by 5 × 5 in the vertical and horizontal directions, and the 25 m square is defined as one section. The terrain data used for the calculation unit 30 described later uses the average value in this 25 m square. This data storage unit 20 may store topographic data of 5 m square, or may store an average value of topographic data in 25 m square in advance.

  Note that the size per section is not specified above. If precise prediction results are required, one section may be made smaller than 25 m. Alternatively, one section may be enlarged when speeding up of arithmetic processing is prioritized.

For example, detailed ground height data of 5m mesh (for example, the base map information numerical elevation model by the Geographical Survey Institute of the Ministry of Land, Infrastructure, Transport and Tourism) and 2m mesh (for example, 2m mesh elevation data by the Japan Map Center) have been published and sold. In such ground height data, the drainage channel may be reflected as surface undulations.
(Calculation unit 30)

  The calculation unit 30 is a member for performing various calculations, and here functions as the water level calculation unit 31. The water level calculation unit 31 predicts the current water level and the water level after a predetermined time for each location based on the weather data acquired by the weather data acquisition unit 10 and the terrain data called from the terrain data storage unit 22. It is a member. For example, the water level calculation unit 31 calculates the inundation risk and the variation of the inundation depth every predetermined time in the predicted area based on the topographic data and weather data (rainfall data) stored in the data storage unit 20. The prediction result obtained by the water level calculation unit 31 can be accumulated in the data storage unit 20.

For example, a CPU can be used as such a water level calculation unit 31. Further, not limited to the CPU, a graphics processing unit (GPU) may be used. By using such GPGPU (General-Purpose computing on Graphics Processing Units), while reducing the load on the CPU, improving the calculation speed and making the prediction result more accurate, the display unit described later 40 enables the system user to easily check the prediction result. For GPGPU, for example, CUDA (trade name) can be used.
(Display unit 40)

The display unit 40 is a member for displaying the results calculated by the calculation unit. For example, it is composed of a display such as an LCD, CRT, or organic EL.
(Operation unit 50)

The operation unit 50 is a member for performing various operations, and includes, for example, a pointing device such as a keyboard and a mouse, a console, and the like. Further, the operation unit 50 and the display unit 40 can be shared by using a touch panel.
(Server / Client)

Further, the computing unit is a server device, and the display unit 40 is a display screen of a client device connected to the server device. Thus, the user accesses the server device from the outside using the client device, and is obtained by the computing unit. Prediction results can be viewed. Such an example is shown in FIG. In this case, the operation unit 50 can use an operation of the client device CL connected to the server device SV via the network, such as a touch panel or a mouse.
(User interface screen of real-time inundation prediction program)

  The display unit 40 displays a user interface screen of the flooding degree real-time prediction program. As described above, the user interface screen of the real-time inundation degree prediction program is a client accessing the server device in which the real-time inundation degree prediction program is installed as shown in FIG. 2 in addition to the display unit 40 connected to a stand-alone computer. A device display screen is also included. Drawing can be made versatile by using a web base.

An example of the user interface screen of the flooding degree real-time prediction program is shown in FIG. The flooding degree real-time prediction program shown in this figure has a map display area 41 and an operation area 60. A map is displayed in the map display area 41.
(Map display area 41)

The display unit 40 has a map display area 41 for displaying a map of a specific area. In the map display area 41, the map is displayed at a predetermined magnification. The map magnification can be enlarged or reduced by operating an enlargement / reduction button 57 provided at a corner of the map display area 41. Alternatively, the scroll buttons of the mouse that constitutes the operation unit 50 may be operated to enlarge or reduce. For data management, grid lines are displayed vertically and horizontally with a predetermined width, and are displayed in blocks divided by lines. Hereinafter, an area partitioned by lines is referred to as a block (reference area mesh). The map display magnification can be changed as appropriate. Furthermore, the flooding risk indicator 42 and the time variation indicator 43 can be displayed on the map display area 41 in an overlapping manner.
(Inundation risk indicator 42)

The inundation risk indicator 42 is a member for displaying the inundation risk indicating the degree of inundation in the corresponding place from the current water level calculated by the water level calculation unit 31 (details will be described later).
(Time variation indicator 43)

The time variation indicator 43 is a member for displaying the time variation of the water level or the inundation risk from the water level after the predetermined time calculated by the water level calculation unit 31 (details will be described later).
(Water level fluctuation direction indicator)

The time fluctuation indicator 43 includes a water level fluctuation direction indicator that indicates whether the water level is rising or falling after a predetermined time has elapsed (details will be described later). This water level fluctuation direction indicator can display the change of the water level in the direction of the arrow. Thereby, not only the current flooding risk level but also the water level and flooding risk level after a predetermined time can be confirmed, so that it can be used as an index for evacuation timing for users during heavy rain. Moreover, it can contribute to the formulation of an evacuation route from the viewpoint of disaster prevention not only during heavy rain but also during normal times.
(Water flow direction indicator 45)

Further, a water flow direction indicator 45 indicating the horizontal direction of water flow at an arbitrary position can be displayed on the map display area 41. Thereby, in addition to the vertical direction in which the water level changes, the moving direction in which the water flows in the horizontal direction is also displayed, which can contribute to the planning of an evacuation route and an evacuation plan. In addition, when the water flow direction indicator 45 is displayed with an arrow or the like, and the time variation indicator 43 described above is displayed with an arrow or the like, it is difficult to determine which arrow is displayed when these are overlapped. In order to make it possible to display only one display or to determine which arrow is the only one, it is possible to display simultaneously in a manner in which the shapes and colors of the arrows are distinguished. For example, the water flow direction indicator 45 can display the moving direction of the water flow in the horizontal direction by displaying it in a moving image.
(Operation area 60)

  The operation area 60 is provided with a display setting unit 61 for setting display contents in the map display area 41 and a display time adjustment slider 62. These members can be operated in a pseudo manner on the screen by the operation unit 50. In the operation area 60, an information display field 63 for displaying various information is also arranged. In addition, a wide area map display area 64, a graph display area 65, and the like can be arranged in the operation area 60. In addition, tools for performing various operations, selections, settings, and the like may be arranged. These arrangements are merely examples, and any layout can be used, for example, displaying the wide area map display area 64 and the graph display area 65 in a separate window.

Specifically, the operation area 60 is provided with a display area selection field 66 for selecting an area to be displayed and a display time selection field 67 for selecting a time to be displayed. In the example of FIG. 3, a display area selection field 66 and a display time selection field 67 are provided in the upper part of the operation area 60, and a list of candidates that can be switched can be displayed and selected from a drop-down list. In addition, the display area selection field 66 and the display time selection field 67 may be directly input with numerical values or characters.
(Information display field 63)

In the information display column 63, information on the weather data acquired by the weather data acquisition unit 10 is displayed. For example, based on the meteorological data at what time, it is displayed when the degree of flooding is predicted from when to when. In the example of FIG. 3, an information display field 63 is provided in the upper part of the operation area 60, and the inundation risk level for 6 hours before and after is predicted based on the weather data at 9 o'clock on August 9, 2014. It shows that. Here, analysis can be performed from 3:00 on August 9, 2014 to 15:00 on August 9, 2014 as the analysis target time. A display time adjustment slider 62 is displayed below the information display field 63.
(Display time adjustment slider 62)

  The display time adjustment slider 62 is a member for adjusting a predetermined time after elapse of the water level or the inundation risk displayed by the time variation indicator 43 from the present time. In conjunction with the operation of the display time adjustment slider 62, the display of the water level or the risk level in the map display area 41 can be changed. In the example of FIG. 3, the display time adjustment slider 62 displays the scale from 3 o'clock to 15 o'clock displayed in the information display field 63, and is the currently displayed time zone, August 9, 2014 4 A handle is placed at the hour position. In the display time selection field 67, “08/09, 03:00:00 to 04:00” is also displayed. Accordingly, the user can confirm that the currently displayed information is information of the time zone from 3:00 to 4:00 on August 9, 2014.

Here, by operating a handle provided movably along the display time adjustment slider 62, it is possible to switch to information of a different time zone. For example, when the display time adjustment slider 62 is operated and moved to the 6 o'clock position, as shown in FIG. 4, the information is switched to the time zone information on August 9, 2014 from 5:00 to 6 o'clock. The display content of the operation area 60 is updated accordingly. Similarly, the display time selection field 67 is also displayed as “08/09, 05:00 to 06:00”. In the example shown in FIG. 5, information on the time zone from 9:00 to 10:00 on August 9, 2014, and in the example shown in FIG. 6, information on the time zone from 10:00 to 11:00 on August 9, 2014, In the example shown in FIG. 7, information on the time zone from 11:00 to 12:00 on August 9, 2014 is shown. Note that not only the operation of the display time adjustment slider 62 but also the selection of the time zone in the display time selection column 67 updates the display contents in the same manner, and the position of the display time adjustment slider 62 is also automatically changed. . In this way, the user can confirm a desired time zone change from the screen. In particular, there can be obtained an advantage that the state can be confirmed while comparing the state changing with time.
(Wide area map display area 64)

A wide area map is displayed in the wide area map display area 64. Preferably, a wide area map including the area displayed in the map display area 41 is displayed. In the example of FIG. 3 and the like, the weather radar acquired from the homepage of the Japan Meteorological Agency, analysis rainfall, and short precipitation forecast are displayed. As a result, it is possible to examine the degree of flooding in a specific area while comparing it with weather information in a wide area. In particular, it will be easier to predict future changes in rainfall due to the movement of rain clouds. Furthermore, the display contents of the weather information in the wide area map display area 64 are also linked to the display time selection field 67 and the display time adjustment slider 62 described above, and the display time is changed by the display time selection field 67 and the display time adjustment slider 62. Accordingly, the display content of the weather information in the wide area map display area 64 is also updated to the selected time information accordingly.
(Rainfall graph display area)

  Various graphs can be displayed in the graph display area 65. For example, it can function as a rainfall graph display area for displaying a rainfall graph. The rainfall graph displays the rainfall of a certain time width in the past or the future. Here, in the area displayed in the map display area 41, the rainfall amount in an arbitrary selected block is displayed. When the selection position is changed, the rainfall graph is also changed accordingly. For example, the screen shown in FIG. 8 shows the amount of rainfall when the leftmost block in the middle of the map display area 41 is selected. The selected block is indicated by a thick frame. This allows the user to visually distinguish which block is being selected. Further, the color of the frame of the selected block may be changed and displayed. In the example of FIG. 8, it is displayed in red.

When one block on the right side is selected from the state of FIG. 8, the screen is switched to the screen shown in FIG. 9, and the display content of the rainfall graph is changed accordingly. Further, information on the block being selected, for example, mesh information and code information included in the block may be displayed on the rainfall graph. Further, in the example of FIG. 8 and the like, a 12-hour rainfall graph is displayed, but the present invention is not limited to this, and it may be 6 hours. In addition, the display can be changed according to the past analysis rainfall and the predicted rainfall in the future. For example, the analysis rainfall is displayed in blue and the predicted rainfall is displayed in red. Thereby, the user can grasp | ascertain the reliability of data visually.
(Display setting unit 61)

The operation area 60 is provided with a display setting unit 61 for setting contents displayed in the map display area 41. The display setting unit 61 is provided with a display mode selection field 68 for selecting, for example, a rainfall display mode, a flooding risk display mode, and a walking difficulty display mode as display modes in the map display area 41.
(Inundation risk display mode)

  In the examples of FIGS. 8 and 9, the flooding risk display mode is selected. In the inundation risk display mode, the current water level is predicted by the water level calculation unit 31 based on weather data and topographic data, and the future water level is also predicted if necessary, and the degree of inundation is indicated accordingly. The flooding risk indicator 42 is displayed on the map display area 41. The inundation risk indicator 42 displays the inundation risk indicating the risk of inundation from the current water level calculated by the water level calculation unit 31 as described above. In this example, the flooding risk indicator 42 is displayed by changing the color of the flooding risk index in predetermined mesh units. Here, a 25 m mesh is displayed in a grid pattern so as to overlap the map display area 41. The mesh changes its color according to the degree of flood risk index. Thereby, since the area | region with a high water level is colored by mesh shape, the user can grasp | ascertain the area | region with a high water level easily visually.

In the example of FIG. 8, the inundation risk index at the currently designated time (from 8:00 to 9:00 on August 9) is less than the predicted inundation risk index of 0.4 (equivalent to an inundation depth of 0.2 m). Area is colorless (no coloring), 0.4 to 0.6 (equivalent to 0.2 to 0.3 m) is yellow, 0.6 to 1.0 (equivalent to 0.3 to 0.5 m) Is displayed in brown, 1.0-1.5 (equivalent to 0.5-0.75m) is red, and 1.5 (equivalent to 0.75m) or more is purple. ing. In addition, a legend 52 of the flood risk index is displayed at the corner of the map display area 41.
(Example of time variation indicator 43)

  Further, in the flooding risk display mode, the display of the time variation indicator 43 can be switched ON / OFF. For example, in the example of FIGS. 8 and 9, such switching is performed by checking the “flooding risk time fluctuation” column 69 provided in the flooding risk display mode selection column of the display mode selection column 68 in the operation area 60. This can be done by turning the mark on / off. For example, in the example of FIGS. 8 and 9, the time variation indicator 43 is not displayed in the image display column by setting the “flooding risk time variation” column 69 to OFF. On the other hand, in FIG. 3 to FIG. 7, the “flooding risk time fluctuation” column 69 is turned ON, so that the time fluctuation indicator 43 is displayed over the image display column. The time variation indicator 43 displays the time variation of the water level or the inundation risk from the water level after the predetermined time calculated by the water level calculation unit 31 as described above. Specifically, the time variation indicator 43 includes a water level variation direction indicator that indicates whether the water level is in a rising direction or a decreasing direction after a predetermined time has elapsed. The water level change direction indicator can display, for example, a change in the water level in the direction of the arrow. Further, the water level change direction indicator can display the degree of change in addition to the change in water level. For example, the amount of change in the water level is displayed by the length of the arrow. In this case, for example, the longer the length of the arrow, the greater the amount of change in the water level. Alternatively, the water level fluctuation direction indicator may display the amount of change in the water level with the thickness of the arrow. In this case, for example, the thicker the arrow, the greater the amount of change in the water level. Alternatively, the amount of change in the water level may be displayed in the color of the arrow. In this case, for example, the change amount of the water level is larger as the color is red, and the change amount of the water level is smaller as the color is blue. Alternatively, the amount of change in the water level may be displayed with shades or gradations of arrows. In this case, for example, the darker the arrow, the larger the amount of change, and the thinner the arrow, the smaller the amount of change in the water level. In addition, the number of arrows, the number of arrowheads, the angle of the arrow, the speed when changing the arrow with a movie, the flashing speed, the presence of highlights, etc. The degree can be expressed by changing. In the example of FIGS. 3 to 7, the direction of the arrow indicates whether the time change of the water level is in the upward direction or the downward direction. When there is no change, it is displayed as a black circle instead of an arrow. Furthermore, the color of the arrow indicates the degree of fluctuation. Here, when the increase after 1 hour is 10 cm or more, it is a red arrow, when the increase after 1 hour is less than 10 cm, it is a black arrow, when there is no change, it is a black circle, and when it decreases after 1 hour Are indicated by light blue arrows. Such color coding and display steps can be changed as appropriate. For example, it may be displayed in different colors depending on the extent to which the water level decreases after 1 hour. In addition, a legend 53 of such a water level fluctuation direction indicator is displayed side by side with a legend 52 of the inundation risk index at the corner of the map display area 41.

  In the above example, an arrow is used as the water level fluctuation direction indicator, but the water level fluctuation direction indicator is not limited to this, and for example, an arbitrary symbol or figure indicating a direction such as a triangle shape, an arrowhead, a heart, or a pointing finger is used. May be. Alternatively, it is possible to display not only a still image but also a moving image. For example, it may be an animation display that moves the water level upward or downward with a moving image so that the water level rises or falls. Alternatively, a mark such as an arrow and a moving image may be combined. For example, a moving image in which an arrow extends upward can be used. Thereby, it is possible to visually indicate the direction of change of the water level to the user.

  Such a water level fluctuation direction indicator is displayed so as to overlap with the inundation risk indicator 42 at the corresponding position in the map. That is, in the examples of FIGS. 3 to 7, the arrows of the water level change direction indicators are arranged so as to be included in this mesh, superimposed on the mesh coloring displayed as the inundation risk display section at each position in the map. Is done. In this way, by displaying the time variation indicator 43 in accordance with the mesh of the inundation risk indicator 42, it is possible to visually indicate which position on the map, that is, the water level variation direction and variation amount in the mesh is indicated. Can be distinguished.

Further, in the above example, the arrow is displayed facing either directly above or directly below, but may be displayed tilted. In particular, when a plurality of arrows are displayed finely, it becomes difficult to see if the arrows overlap each other. Therefore, by slightly tilting the display, even if the arrows overlap each other, it is easy to visually recognize the arrows.
(Rainfall display mode)

Next, the state switched to the rainfall display mode in the display mode selection column 68 is shown in FIG. The information shown in the map display area 41 in this figure is obtained by displaying the analysis rainfall or the short-term predicted rainfall in the time zone from 5:00 to 6:00 on August 9, 2014 for each block. Here, in block units, each block is colored and displayed according to the excessive amount of rainfall in the block. Here, for example, 80 mm or more is purple, 50 mm to 80 mm is red, 0 mm or less is not colored, etc., depending on the amount of rainfall per hour. This example is an example, and the color to be displayed, the number of sections, and the like can be set as appropriate according to the application. Preferably, the color change corresponding to the rainfall amount process is made to correspond to the display on the inundation risk indicator 42 described above. As a result, changes in water level and rainfall can be visually grasped with the same color coding. The user can know information such as the current rainfall amount and a change in the future rainfall amount, and can contribute to the examination of the current situation, evacuation timing, evacuation route, timeline, and the like. Further, a legend 54 for displaying the rainfall amount is displayed at the corner of the map display area 41. Further, similarly to the above-described example of the inundation risk display mode, when the display time is changed by the display time selection field 67 or the display time adjustment slider 62, the rainfall amount display in the map display area 41 is also updated accordingly. Needless to say, the weather information in the wide area map display area 64 is also updated in the same manner.
(Walking difficulty display mode)

  Furthermore, the state switched to the walking difficulty level display mode in the display mode selection column 68 is shown in FIG. The information shown in the map display area 41 in this figure is the information indicating the difficulty of walking in the time zone from 14:00 to 15:00 on August 9, 2014 in units of 25 m mesh. Here, the areas determined to be difficult to walk are colored and displayed in units of 25 m mesh. In this example, the difficulty level of walking is divided into three levels: walkable, difficult to walk, and unable to walk, and are colored colorless, yellow, and red, respectively. These color classifications and stages are examples, and the difficulty in walking can be displayed in any manner. A legend 55 of difficulty in walking is displayed at the corner of the map display area 41. Since the user can know the difficulty of walking at each position on the map, it can contribute particularly to the formulation of an evacuation route and the examination of the timeline.

Further, similarly to the above-described example of the inundation risk display mode and the rainfall display mode, when the display time is changed by the display time selection field 67 or the display time adjustment slider 62, the walking difficulty in the map display area 41 is changed accordingly. The display is also updated. Needless to say, the weather information in the wide area map display area 64 is also updated in the same manner.
(Facility display function)

  Further, the display unit 40 may have a facility display function for displaying information regarding a specific facility on the map. For example, a school display function for displaying the school position, a drainage station display function for displaying the position of the drainage station, a shelter display function for displaying the position of the shelter, and the like are provided on the map display area 41. For example, the example shown in FIG. 12 shows a state where the facility display function is turned on. The facility display function can be switched ON / OFF independently of the display mode selection in the display mode selection field 68 described above. Thereby, in any display mode, the facility display function can be used.

  When the facility display function is turned on, the facility mark 70 is displayed over the map displayed in the map display area 41. Examples of facilities that can be displayed include evacuation facilities and facilities with drainage capacity, such as schools and drainage stations. In particular, in a school display function for displaying a school position, a kindergarten, a nursery school, a social welfare facility, or the like may be displayed. In the map display area 41 of FIG. 12, facility marks 70 indicating elementary school, junior high school, and drainage station are displayed on the map. Further, a legend 56 of facility display is displayed in the upper right corner of the map display area 41. By displaying elementary schools and junior high schools in this way, it is possible to confirm the positions of these schools, the situation around the schools, school routes, and the like, which can contribute to the development of evacuation routes and school routes. In addition, in the event of flooding, the system manager, such as the school principal, decides whether or not each school child should return home during a disaster such as heavy rain based on the flooding risk indicator 42 and facility mark 70. It can be used as a judgment material for doing this. In addition, critical information such as heliports, government offices, hospitals, fire stations, police stations, emergency transportation routes, and landslide disaster warning areas can be displayed.

  In the above example, the display form of the map in the map display area 41 is based on a satellite photograph, but is not limited to this, and may be an aerial photograph or a map on a chart. Further, the display direction of the map may be rotatable in any direction other than the display with north as the top. In this case, it is preferable to display the direction display portion so as to overlap the map display area 41 to indicate which direction indicates north. Furthermore, a larger area may be displayed by displaying the map obliquely in a three-dimensional shape. Further, by providing a GPS function, a current user position may be detected, and a map around this position may be automatically selected and displayed.

Moreover, as shown in FIG. 1 etc., you may provide the advertisement display area 44 on which a part of the display part 40 displays an advertisement. This makes it possible to provide real-time flooding degree prediction information to users free of advertising revenue. The advertisement display area 44 is preferably displayed in a part of the display area or in a separate window.
(Water flow direction display function)

  Furthermore, the inundation degree real-time prediction apparatus can display the water flow direction on each mesh on the map displayed in the map display area 41. Specifically, the water flow direction indicator 45 indicates in which direction the submerged water is flowing and the direction of the water flow. The inundation degree real-time prediction device uses the calculation unit 40 to calculate the water flow direction in which the rain that has fallen on each mesh flows from the rainfall data obtained by the data acquisition unit 10 and the terrain data stored in the data storage unit 20. This prediction result is displayed on a map. FIG. 13 shows a schematic diagram in which the water flow direction is displayed on the map. The display screen of FIG. 13 displays the water flow direction of an adjacent mesh with respect to a certain mesh selected by the system user. The display screen of the figure displays the water level change direction indicator 46 on the mesh selected by the system user, and the water flow direction indicator 45a indicating the direction of the water flow on the surrounding mesh. Thereby, the system user can confirm how the water flow is flowing on the ground surface. In FIG. 13, the water flow direction indicator 45a is displayed only on the mesh adjacent to the center mesh. However, the water flow direction indicator is displayed on the mesh of the entire region displayed in the map display area 41, and the water flow direction in the entire region is displayed. You may make it understand.

Heretofore, the inundation degree real-time prediction apparatus of this embodiment has been described. On the map displayed in the map display area 41, the inundation degree real-time prediction device displays an inundation risk indicator 42 indicating the inundation risk for each mesh and a water level change direction indicator indicating a change in inundation depth on the map. By displaying this on the screen, the system user confirms this map display area 41, and shows the presence / absence of inundation, the degree of inundation risk and the inundation depth for each mesh at a predicted time within the next several hours on one screen. Can be confirmed. Further, by displaying the inundation risk indicator 42 and the water level change direction indicator on the same map, the system user can check the change of the risk of each mesh and the inundation depth at a time. Thus, by displaying the inundation risk indicator 42 and the water level change direction indicator at the same time, for example, there is a particularly dangerous area where the inundation depth further increases after a predetermined time with a mesh that has already been submerged. It is possible to determine an area that is safe in time but is likely to become dangerous after a predetermined time. Further, by changing the time of the prediction result displayed on the map, the system user can easily confirm the change of the inundation depth at each time of the entire region. Thereby, even if the prediction result displayed on the map at a time increases, it is possible to grasp the future flooding situation in a short time. As described above, the inundation degree real-time prediction apparatus can be used by a system user to specify an area where evacuation is necessary or to determine a safe evacuation route.
(Modification 1)

  As mentioned above, although the flooding degree real-time prediction apparatus of Embodiment 1 was demonstrated, embodiment of this invention is not specified above. Hereinafter, Modification 1 will be described with reference to FIG. FIG. 14 is a schematic enlarged view of the display screen of the real time flooding degree prediction apparatus according to the first modification. As shown in FIG. 14, the fluctuation of the inundation depth is displayed by the length of the arrow-shaped water level fluctuation direction indicator 46b. In the water level fluctuation direction indicator 46b shown in the drawing, the arrow is lengthened if the fluctuation of the inundation depth after a predetermined time in each mesh is large, and the arrow length is shortened if it is small. Further, the water level fluctuation direction indicator 46b in the figure is displayed in an inclined manner. By tilting the water level fluctuation direction indicator 46b in this way, even if the length of the water level fluctuation direction indicator 46b in a certain mesh is increased, the water level fluctuation direction indicator 46b of the mesh adjacent to the water level fluctuation direction indicator 46b is obtained. This is because they can be kept from overlapping each other. As described above, by displaying the variation amount of the inundation depth by the length of the arrow, the system user can intuitively understand the variation of the inundation depth in each mesh. However, it goes without saying that it can be displayed by a symbol other than an arrow although not shown. If the symbol includes a rod-shaped portion as a part of the symbol, the amount of fluctuation of the inundation depth can be displayed by the rod-shaped portion.

As described above, the time variation indicator 43 can be displayed so as to overlap the inundation risk indicator 42. Thereby, the time variation indicator 43 and the inundation risk indicator 42 are simultaneously displayed on each screen at each position, and the inundation risk and the fluctuation direction of the water level can be confirmed from both sides. Further, when the inundation risk indicator 42 and the time variation indicator 43 at each position in the corresponding map are displayed in an overlapping manner, the time variation indicator 43 has a size corresponding to the mesh of the inundation risk indicator 42. It is preferable to display it. Note that the flooding risk indicator and the time variation indicator may be switched and displayed.
(Modification 2)

  Furthermore, in the above embodiment, the risk level display and the water level change direction indicator are superimposed and displayed on the map in a two-dimensional manner. However, as in Modification 2 described below, a three-dimensional display is provided. It can be a display. FIG. 15 is a schematic enlarged view of the display screen of the real time flooding degree prediction apparatus according to the second modification. The display screen of the inundation degree real-time prediction apparatus shown in the figure displays the map so as to look down from diagonally above. The display form on the map can be displayed in a predetermined mesh unit as in the above embodiment. Each mesh is displayed with an inundation risk indicator 42 in an overlapping manner depending on the level of the risk. Furthermore, on each mesh in the figure, a water level fluctuation direction indicator 46c represented by a quadrangular prism or a triangular pyramid is displayed. The inundation depth fluctuation display in the figure is represented by a square column in a mesh in which the inundation depth increases after a predetermined time. This square column shows the rise of the inundation depth and the amount of the rise. In addition, the water level fluctuation direction indicator 46c in the figure is represented by a triangular pyramid whose tip is directed downward in a mesh in which the water immersion depth decreases after a predetermined time. However, the shape of the water level fluctuation direction indicator 46c described above is merely an example, and it goes without saying that other shapes can be used. In the flood degree real-time predicting device of the above-described modification 2, the mesh is visually informed to the system user by the length of the water level fluctuation direction indicator 46c displayed in three dimensions in the mesh having a large increase in the flood depth. Can appeal for danger.

Heretofore, the flood degree real-time prediction apparatus according to the first embodiment and the modifications 1 and 2 has been described. However, in the above modification, only the shape of the water level fluctuation direction indicator is mentioned, but it is needless to say that the difference in color and pattern can be used as in the first embodiment. For example, it is possible to make the danger of each mesh easy to understand in a color-sensitive manner for the system user by making red, which is a warning color, particularly in an area where the inundation depth increases.
(Ground surface model)

  For the terrain data held by the terrain data storage unit 22, for example, a ground surface model used for calculation of the ground surface flow can be used. The ground surface model is recorded in units obtained by dividing a map with a 5 m to 25 m mesh. From this topographic data, for example, the height difference between positions that are separated by a certain distance can be grasped. Furthermore, the data storage unit 20 can also store data during past rainfall.

In addition, the storage period can be set to a constant value. For example, data for the past week is automatically saved, and data over one week is overwritten. Thereby, excessive accumulation of data can be avoided. Alternatively, only necessary data may be manually stored. For example, by storing the data of past floods in a specific area, the water level at that time can be reproduced. Based on this, evacuation routes in the event of a disaster such as the occurrence of future heavy rain should be confirmed in advance at the user level, or at the administrative level, areas to be avoided and recommended evacuation should be devised. It can be used as a reference when determining the ground.
(Drainage model)

In the above example, the ground surface model is used as the terrain data. However, a drainage channel model may be combined with topographic data. Such an example is shown in FIG. The inundation degree real-time prediction apparatus 200 shown in this figure is provided with a drainage channel data storage unit 23 for storing a drainage channel model. The drainage channel model is information indicating the drainage capacity at each position of the terrain data, and is held in association with each position of the terrain data. For example, the presence or absence of drainage channels such as sewers and gutters (open channels) at each position and the amount of drainage per unit time are maintained. By using this drainage channel model, when the water level calculation unit 31 predicts the current water level and the future water level, not only the accumulation of rainfall, but also the drainage capacity such as the amount of drainage per unit time, Accurate water level calculation is possible. The data stored in the storage unit is not limited to drainage channel data, but instead of or in addition to this, sewage channel data, storage facility data, infiltration facility data, Xiamen and sluice gate data, etc. may be used. it can.
(Relation between ground surface model and drainage channel model)

  The relationship between the ground surface model and the drainage channel model is shown in FIG. As shown in this figure, the map is divided into mesh size (dx) × (dy), and information on the part where the drainage channel is provided is added. Thereby, the flow in the drainage channel based on the drainage channel model is added to the ground surface flow based on the ground surface model, and the inflow from the ground surface to the drainage channel as shown by the parabolic arrow in FIG. Conversely, mutual water flow such as overflow from the drainage channel to the ground surface is considered.

  Conventionally, there are many districts such as Tokushima City where rainwater is drained by drainage channels (open channels) because the sewerage system has not been developed. In such a district, if it is attempted to predict inland water damage by numerical analysis, it is necessary to calculate the drainage channel model in a layer separate from the ground surface model. It is necessary to survey. On the other hand, in recent years, detailed ground height data of 5 m mesh or 2 m mesh has been announced and sold depending on the region, and the drainage channel may be reflected as surface undulations in such ground height data.

  Therefore, the present inventors conducted a comparative test, targeting an area where rainwater is drained only by a drainage channel, an analysis result (Example 1) in which a ground surface model and a drainage channel model are taken into consideration with a 25m mesh, and a 25m mesh. Thus, the analysis results of only the ground surface model (Example 2) and the analysis results of only the ground surface model with 5 m mesh (Example 3) were compared. Here, X-Okabe (registered trademark) (trade name: flood analysis AFREL (registered trademark)) was used as the analysis code. This analysis code combines three submodels: a two-dimensional unsteady flow model (ground surface model), a one-dimensional open channel unsteady flow model (drainage channel model), and a one-dimensional pipe channel unsteady flow model (sewage channel model). It is built by that. Note that the sewage model is not used in the area targeted in this example because the sewage pipes are not yet developed. It is also possible to consider the effects of existing facilities related to internal water drainage, such as drainage channel networks, rainwater drainage sewer networks, sluice gates, lock gates, and drainage stations. In addition, the ground elevation in the analysis of 5m and 25m mesh used the average value of the known point in a mesh.

  Here, the amount of rainfall is given as the water depth of the ground surface, and the inundation depth and flow velocity of the ground surface between adjacent meshes in the ground surface layer are calculated. The drainage channel is modeled to run in the center of the ground surface mesh as shown in FIG. For meshes with drainage channels, the inflow amount from the ground surface to the drainage channel is calculated according to Honma's overflow formula, and the amount of water moves from the ground surface layer to the drainage channel layer. When the water level in the drainage channel is higher than the water level on the ground surface, the amount of overflow shifts from the drainage channel layer to the ground surface layer. When meshes with drainage channels are adjacent, the flow rate in the drainage channel between adjacent meshes in the drainage channel layer is calculated.

  FIG. 18 shows the waveform of the rain that is the object of this embodiment. The target rainfall was assumed to be a virtual rainfall waveform having a rainfall intensity of 60 mm / hr from 0 hour to 3 hours from the start of calculation.

The targeted area is an area located in the suburbs of Tokushima Prefecture. Figure 19 shows the drainage system in this area. In this area, there is no sewerage system, and drainage to the outside of the levee is carried out by the drainage station at the end of the drainage through the drainage channel and the inland river. In FIG. 19, the portion marked with ■ (the part colored in light blue as an inland river) has a river width of 25 m or more, and therefore the inland water river is modeled as a ground undulation even in the analysis with a 25 m mesh.
(Analysis result)

About three of Examples 1-3, maximum water immersion depth distribution is shown to FIG. 20A-FIG. 20C. In these figures, the maximum inundation amount and floor inundation standard for each example are the standards (see National Land Development Technology Center “Guidelines for Inland Water Treatment Planning”), and the maximum inundation area of 0.45 m or more. Also shown. Comparing the maximum flooding water of the examples, Example 1, 432 000 m ^3, in Example 2 809 000 m ^3, it was Example 3 In 475 000 m ^3. Further, when comparing the maximum flooded area of each example of 0.45 m ³ or more, Example 1 was 393,000 m ² , Example 2 was 830,000 m ² , and Example 3 was 4560,000 m ^2. Met. From these, it is considered that the analysis of only the ground surface model with 5m mesh reflects the influence of the drainage channel model with 25m mesh at 88.6% in the maximum flooding amount and 85.6% in the maximum flooded area. Therefore, the analysis with a 5 m mesh can largely reflect the influence of the drainage channel model, and it is considered that the analysis using only the ground surface model can be used practically without any trouble. This realizes real-time prediction of the inundation level that can be used even if the drainage channel model is omitted.

  The inundation degree real-time prediction apparatus, the inundation degree real-time prediction method, the inundation degree real-time prediction program, and the computer-readable recording medium of the present invention display the time variation of the inundation depth along with the inundation risk on the map. It is possible to easily check the inundation risk level and the time variation of the inundation depth, and use it as an inundation degree real-time prediction device that can be used to determine the necessity of evacuation and the evacuation route.

DESCRIPTION OF SYMBOLS 100, 200 ... Flooding degree real-time prediction apparatus 10 ... Data acquisition part 20 ... Data storage part 21 ... Meteorological data storage part 22 ... Topographic data storage part 23 ... Drainage channel data storage part 30 ... Calculation part 31 ... Water level calculation part 40 ... Display Unit 41 ... Map display area 42 ... Inundation risk indicator 43 ... Time fluctuation indicator 44 ... Advertisement display areas 45, 45a ... Water flow direction indicators 46, 46b, 46c ... Water level fluctuation direction indicator 50 ... Operation unit 52 ... Inundation Legend 53 of the risk index ... Legend 54 of the water level change direction indicator ... Legend 55 of the rainfall display ... Legend 56 of the difficulty of walking ... Legend 57 of the facility display ... Zoom button 60 ... Operation area 61 ... Display setting part 62 ... Display time adjustment slider 63 ... Information display field 64 ... Wide area map display area 65 ... Graph display area 66 ... Display area selection field 67 ... Display time selection field 68 ... Display mode selection field 69 ... Flood risk time change "column 70 ... facility marks SV ... server equipment CL ... client equipment

Claims (24)

A weather data acquisition unit for acquiring weather data;
A terrain data storage unit for storing terrain data;
Based on the meteorological data acquired by the meteorological data acquisition unit and the terrain data called from the terrain data storage unit, the water level calculation unit that predicts the current water level and the water level after a predetermined time for each place,
A display unit having a map display area for displaying a map of a specific area;
With
The display unit
Overlaid on the map display area, for any position in the map displayed in the map display area,
An inundation risk indicator for displaying an inundation risk level indicating the inundation risk level from the current water level calculated by the water level calculation unit;
A time variation indicator for displaying the time variation of the water level or the inundation risk from the water level after the predetermined time calculated by the water level calculation unit,
A real-time inundation degree prediction device. The inundation degree real-time prediction apparatus according to claim 1,
A flooding degree real-time prediction apparatus having a water level fluctuation direction indicator that indicates whether the time fluctuation indicator is in a direction in which the water level rises or falls after a predetermined time has elapsed. The inundation degree real-time prediction device according to claim 2,
The flood level real-time prediction apparatus in which the water level fluctuation direction indicator displays a change in the water level in the direction of an arrow. The inundation degree real-time prediction apparatus according to claim 3,
When the water level change direction indicator changes in the direction in which the water level rises, it is indicated with an upward arrow, and when the water level changes in the direction in which the water level decreases, it is indicated with a downward arrow in real time. apparatus. The inundation degree real-time prediction apparatus according to claim 3 or 4,
The water level fluctuation direction indicator is configured to display in a dot shape when the water level does not change, and is configured to display in a dot shape in real time. The inundation degree real-time prediction device according to claim 2,
The flood level real-time prediction apparatus in which the water level fluctuation direction indicator displays the amount of change in the water level with the length of the arrow. The inundation degree real-time prediction device according to claim 2,
The flood level real-time prediction apparatus in which the water level fluctuation direction indicator displays the amount of change in the water level with the thickness of an arrow. The inundation degree real-time prediction device according to claim 2,
The flood level real-time prediction apparatus in which the water level fluctuation direction indicator displays the amount of change in the water level in the color of an arrow. The inundation degree real-time prediction device according to any one of claims 1 to 8,
A real-time inundation degree prediction device in which the terrain data held in the terrain data storage unit includes a ground surface model. The inundation degree real-time prediction device according to claim 9,
The inundation degree real-time prediction device in which the ground surface model is held in the terrain data storage unit in a unit obtained by partitioning a map with 5 to 25 m mesh. The inundation degree real-time prediction device according to any one of claims 1 to 10, further comprising:
A drainage channel data storage unit is provided for holding a drainage channel model indicating information on drainage capacity at an arbitrary position, superimposed on the terrain data stored in the terrain data storage unit,
The water level calculation unit considers drainage capacity according to the meteorological data acquired by the meteorological data acquisition unit, the topographic data stored in the topographic data storage unit, and the drainage channel model stored in the drainage channel data storage unit. A real time inundation degree prediction device configured to calculate the water level after a predetermined time has elapsed. The inundation degree real-time prediction device according to any one of claims 1 to 11, further comprising:
A display time adjustment slider for adjusting a predetermined time after elapse of the water level or the inundation risk displayed by the time change indicator,
An inundation degree real-time prediction device that changes the display of the water level or the degree of danger in the map display area in conjunction with the operation of the display time adjustment slider. The inundation degree real-time prediction device according to any one of claims 1 to 12,
The said display part is an inundation degree real-time prediction apparatus which can display a time fluctuation indicator on the said inundation risk indicator. The inundation degree real-time prediction device according to any one of claims 1 to 12,
The said display part is a flooding level real-time prediction apparatus which can display the said flooding risk indicator and a time fluctuation indicator simultaneously on one screen. The inundation degree real-time prediction device according to claim 14,
The display unit displays the flooding risk indicator and the time variation indicator at each position in the corresponding map in an overlapping manner, and the time variation indicator has a size corresponding to the mesh of the flooding risk indicator. This is a real-time flooding prediction device. The inundation degree real-time prediction device according to any one of claims 1 to 15,
The said display part is a flooding level real-time prediction apparatus which displays the water level displayed by the said time variation indicator, or the time variation of a flooding danger level by animation. The inundation degree real-time prediction device according to any one of claims 1 to 16,
The display unit further includes an advertisement display area, and a real time prediction device for flooding degree. The inundation degree real-time prediction device according to any one of claims 1 to 17,
The said display part is an inundation degree real-time prediction apparatus provided with the rainfall graph display area | region which displays a rainfall graph further. The inundation degree real-time prediction device according to any one of claims 1 to 18,
The display unit further includes a school display function for displaying the position of the school over the map display area;
Drainage station display function to display the location of the drainage station,
A shelter display function that displays the location of the shelter,
An inundation degree real-time prediction apparatus provided with at least one of the difficulty-of-walking display function for displaying difficulty of walking. The inundation degree real-time prediction device according to any one of claims 1 to 19,
The said water level calculating part is a flooding degree real-time prediction apparatus comprised so that the water level after predetermined time may be estimated for every place with a graphics processing unit. It is a flood degree real-time prediction device according to any one of claims 1 to 20,
The display unit further includes
An inundation degree real-time prediction apparatus including a water flow direction indicator indicating an arrow indicating a horizontal direction in which water flows at an arbitrary position, overlaid on the map display area. Inundation degree real-time prediction method for predicting inundation degree based on meteorological data and topographic data,
Obtaining weather data and topographic data respectively;
Predicting the water level after a predetermined time for each location based on the acquired weather data and terrain data;
Inundation degree real-time including a step of displaying the inundation risk level at a corresponding place from the water level calculated by the water level calculation unit and displaying the time variation of the inundation risk level over the map display area of the display unit Prediction method. A real-time inundation degree prediction program for predicting inundation degree based on weather data and topographic data,
The ability to get weather data,
The ability to retain terrain data;
A function for predicting the water level after a predetermined time for each location based on the acquired weather data and terrain data;
A computer that has the function of displaying the inundation risk at the appropriate location from the water level calculated by the water level calculation unit and the function of displaying the time fluctuation of the inundation risk over the map display area of the display unit. A real-time flooding prediction program.   24. A computer-readable recording medium storing the program according to claim 23 or a stored device.