Number of people needing evacuation in flood estimation system

Abstract

To provide a number-of-people-needing-evacuation-in-flood estimation system that can estimate the number of people in need of evacuation in the event of a flood.SOLUTION: A system comprises: flooding information acquisition means 12; data management means 14 in which building attribute information indicating attributes including a position and three-dimensional shape of each building, and a building occupancy information indicating the number of people residing or staying in the building are registered; number of people needing evacuation estimation means 16 for estimating the number of people in need of evacuation for each building included in an expected flooding area and for each evacuation type set based on a flood depth at the building's location, based on the flooding information acquired by the flooding information acquisition means 12 and the building attribute information and building occupancy information of each building registered in the data management means 14; and display means 18 for displaying the number of people in need of evacuation estimated by the number of people needing evacuation estimation means 16, in a corresponding area on a background map using a prescribed graph.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a flood evacuation number estimation system that can estimate the number of people who will need to evacuate when a flood occurs. [Background technology]

[0002] In recent years, torrential rains caused by linear precipitation bands have occurred frequently in various regions, and there have been an increasing number of cases of flood disasters caused by rivers overflowing. Immediately after the floods occurred, the dissemination of information about the actual damage in the affected areas was significantly delayed due to confusion in the affected areas, making it difficult for response personnel both inside and outside the affected areas to take prompt and efficient response actions such as providing evacuation support.

[0003] On the other hand, conventional disaster response support systems include an earthquake response support system that supports earthquake response actions when an earthquake occurs (see, for example, Patent Document 1) and a flood simulation device that predicts the risk of flooding (see, for example, Patent Document 2).

[0004] The earthquake response support system described in Patent Document 1 estimates the possibility of damage to each building from the distribution information of earthquake motion intensity in the affected area immediately after the occurrence of an earthquake, tallying up the number of buildings by the possibility of damage for each divided area, and displaying it in the corresponding area on a background map in a specified graph.

[0005] The flood simulation device described in Patent Document 2 acquires the river water level, calculates the water level difference between the river and the ground level of the floodplain that will be affected by flooding, and displays this water level difference as a flood potential corresponding to the floodplain. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2020-91113 A [Patent Document 2] Patent Publication No. 2022-14330 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the earthquake disaster response support system of Patent Document 1 is a system specialized for earthquake disasters, and therefore cannot be applied directly to flood disasters. In addition, the flood simulation device of Patent Document 2 can use the predicted flood risk to determine evacuation actions, but cannot obtain the number of people who need to evacuate. For this reason, there has been a demand for technology that can estimate the number of people who need to evacuate in order to ensure the speed and efficiency of response actions such as evacuation support when a flood occurs.

[0008] The present invention has been made in consideration of the above, and aims to provide a flood evacuation requirement number estimation system that can estimate the number of people who will need to evacuate when a flood occurs. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems and achieve the object, the system for estimating the number of people requiring evacuation due to flooding of the present invention is a system for estimating the number of people requiring evacuation due to flooding, which estimates the number of people requiring evacuation in the event of a flood, and is characterized by comprising: a flood information acquisition means for acquiring flood information including an expected flooded area where flooding due to flooding is expected and flood depth; a data management means in which building attribute information indicating attributes including the position and three-dimensional shape of each building and building number of people information indicating the number of people residing or staying in the building are registered; a number of people requiring evacuation estimation means for estimating the number of people requiring evacuation for each building included in the expected flooded area and for each evacuation type set based on the flood depth at the location of the building, based on the flood information acquired by the flood information acquisition means and the building attribute information and building number of people information of each building registered in the data management means; and a display means for displaying the number of people requiring evacuation estimated by the number of people requiring evacuation estimation means in a corresponding area on a background map in the form of a predetermined graph.

[0010] Furthermore, another flood evacuation requiring evacuation estimation system according to the present invention is characterized in that, in the above-mentioned invention, the inundation information acquisition means acquires the inundation information for each specified time due to the occurrence of a flood, the number of people requiring evacuation estimation means estimates the number of people requiring evacuation for each specified time, and the display means displays the number of people requiring evacuation for each specified time.

[0011] In addition, another flood evacuation requiring evacuation estimation system according to the present invention is characterized in that, in the above-mentioned invention, the display means displays the number of people requiring evacuation in a pie chart consisting of a circle indicating the number of people requiring evacuation and concentric circles arranged outside the circle indicating the number of people requiring evacuation for each evacuation type. Effect of the Invention

[0012] According to the system for estimating the number of people requiring evacuation due to flooding of the present invention, the system estimates the number of people requiring evacuation in the event of a flood, and is equipped with a flood information acquisition means for acquiring flood information including expected flooded areas and flood depths where flooding due to a flood is expected, a data management means in which building attribute information indicating attributes including the position and three-dimensional shape of each building and building number of people information indicating the number of people residing or staying in the buildings are registered, a number of people requiring evacuation estimation means for estimating the number of people requiring evacuation for each building included in the expected flooded area and for each evacuation type set based on the flood depth at the location of the building, based on the flood information acquired by the flood information acquisition means and the building attribute information and building number of people information of each building registered in the data management means, and a display means for displaying the number of people requiring evacuation estimated by the number of people requiring evacuation estimation means in a corresponding area on a background map in the form of a predetermined graph, thereby achieving the effect of being able to estimate and display the number of people requiring evacuation in the event of a flood.

[0013] In addition, according to another flood evacuation number estimation system of the present invention, the inundation information acquisition means acquires the inundation information for each specified hour due to the occurrence of a flood, the number of people needing evacuation estimation means estimates the number of people needing evacuation for each specified hour, and the display means displays the number of people needing evacuation for each specified hour, thereby achieving the effect of being able to estimate and display the number of people needing evacuation for each hour due to the occurrence of a flood.

[0014] In addition, according to another flood evacuation requiring evacuation estimation system of the present invention, the display means displays the number of people needing evacuation in a pie chart consisting of a circle indicating the number of people needing evacuation and concentric circles placed outside the circle indicating the number of people needing evacuation for each evacuation form, thereby providing the effect of making it easy to grasp the number of people needing evacuation for each evacuation form. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram showing an embodiment of a system for estimating the number of people requiring evacuation due to flood according to the present invention. [Diagram 2] FIG. 2 is a perspective view showing an example of a three-dimensional city model. [Diagram 3] Figure 3 is a table showing examples of correspondence between flood depth and evacuation methods. [Figure 4] FIG. 4 is a diagram showing an example of displaying the number of people who need to evacuate. [Diagram 5] FIG. 5 is a diagram showing another example of displaying the number of people requiring evacuation. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of a system for estimating the number of people requiring evacuation due to floods according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the embodiment.

[0017] As shown in Figure 1, a flood evacuation number estimation system 10 according to an embodiment of the present invention is a system that estimates the number of people who need to be evacuated when a flood occurs, and is equipped with a flood information acquisition means 12, a data management means 14, a number of people needing evacuation estimation means 16, a display means 18, and a management and control means 20, and is installed, for example, in a flood response control room.

[0018] The flood information acquisition means 12 acquires flood information related to flooding. The flood information includes areas expected to be flooded and flood depths that are expected to be flooded due to flooding. The flood information is acquired for each predetermined time due to flooding. The areas expected to be flooded and the flood depths are, for example, obtained from the "Flood Flooding Area Data" (Internet) published by the Ministry of Land, Infrastructure, Transport and Tourism as national land numerical information.<URL:https: / / nlftp.mlit.go.jp / ksj / gml / datalist / KsjTmplt-A31-v2_1.html> ), and the "Flood Navi" provided by the Ministry of Land, Infrastructure, Transport and Tourism (Internet<URL:https: / / suiboumap.gsi.go.jp / > ), or the detection results from well-known flood sensors, prediction results from flood simulation devices, etc. For example, when using the "Flood Navigator," time-series data on the expected flood area and flood depth can be obtained by selecting one or more expected levee breach points of a river.

[0019] The data management means 14 holds and registers data such as building attribute information of each building present in the target area, building number of people information, etc. This data management means 14 can be configured, for example, by a database.

[0020] The building attribute information is information indicating attributes including the location and three-dimensional shape of each building. The building occupancy information is information indicating the number of people (number of people) residing or staying in a building. The building attribute information includes, for example, the building name, location (three-dimensional coordinates), shape, structural type, number of floors, floor height of each floor, building height, and year of construction. The building attribute information may utilize building attribute data included in three-dimensional map data. As an example of three-dimensional map data, there is the "PLATEAU" (Internet) project led by the Ministry of Land, Infrastructure, Transport and Tourism to develop and open-source 3D city models of all of Japan.<URL:https: / / www.mlit.go.jp / plateau / > ) can be used. In this 3D city model, attribute data is assigned to the entire building and each surface (polygon) that makes up the building, such as the walls and roof. Figure 2 shows an example of a 3D city model provided by PLATEAU.

[0021] The means for estimating number of people requiring evacuation 16 estimates the number of people requiring evacuation for each building included in the expected flooding area and for each evacuation form, based on the flooding information acquired by the flooding information acquisition means 12 and the building attribute information and building number of people information for each building registered in the data management means 14. The number of people requiring evacuation is the number of people who need to evacuate among those residing or staying in buildings in the expected flooding area, and is estimated for each specified time after the occurrence of a flood. Note that the means for estimating number of people requiring evacuation 16 estimates the number of people requiring evacuation for each building only once when the flood depth for each building is determined.

[0022] It is preferable that the evacuation mode is set in advance based on the flood depth at the building location. FIG. 3 shows an example of the correspondence relationship between the flood depth, the flooding situation, and the minimum desirable evacuation mode. In this example, when the flood depth at the building location is less than 0.5 m, the evacuation mode of staying at home is set assuming subfloor flooding. When the flood depth at the building location is 0.5 m or more and less than the top floor height, the evacuation mode of vertical evacuation is set assuming subfloor flooding. When the flood depth at the building location is equal to or more than the top floor height, the evacuation mode of horizontal evacuation is set assuming subfloor flooding. Note that FIG. 3 is an example of the correspondence relationship, and other correspondence relationships may be set. It is preferable that the correspondence table is registered in advance in the data management means 14.

[0023] Next, we will explain an example of the operation of the means for estimating the number of people requiring evacuation 16. For example, when a flood-prone area A and the flood depth h(P) at each point P within this area A are acquired as flood information, a group of buildings B located in the flood-prone area A is extracted by referring to the building positions in the building attribute information.

[0024] On the other hand, the evacuation form for each building in group B is determined based on the flood depth corresponding to the location of each building. When determining the evacuation form using the correspondence table in Figure 3, the determination is made by referring to the top floor height in the building attribute information of the building. A breakdown of people needing to evacuate is obtained by evacuation form, and the number of people needing to evacuate for each evacuation form within each area A is estimated.

[0025] The display means 18 displays the background map on a screen, and displays the number of people requiring evacuation estimated by the means for estimating number of people requiring evacuation 16 in a corresponding area on the background map in a predetermined graph for each predetermined time, and is composed of, for example, a display. The display means 18 also has a function of dividing the expected flooded area into multiple areas so that buildings located close to each other are grouped together, and tallying up the number of people requiring evacuation for each evacuation form for each divided area. In this case, it is preferable to divide the expected flooded area into multiple areas of roughly the same size. It is preferable that the division of the areas and the tallying up are performed automatically according to the scale of the map.

[0026] The background map can utilize map information such as GIS. Using the display means 18, for example, on the background map, flood information such as the flood inundation assumed area, inundation depth, and inundation situation can be superimposed and displayed, similar to the Hazard Map Portal Site of the Ministry of Land, Infrastructure, Transport and Tourism (Internet <URL:https: / / disaportal.gsi.go.jp / hazardmap / copyright / opendata.html>). It is preferable that the flood information to be superimposed and displayed can be the information at any arbitrary time point after the flood occurs. The flood inundation assumed area may be displayed with color-coding according to the rank of the inundation depth. The display content may be made switchable according to the ranks of the flood inundation assumed area, "planned scale" and "maximum assumed scale". Also, a graph showing the time change of the inundation depth, inundation situation, etc. at an arbitrary location may be displayed. It may be possible to select and switch these display / non-display states.

[0027] FIG. 4 shows an example of the screen displayed by the display means 18. As shown in this figure, on the two-dimensional background map, the flood inundation assumed area is superimposed and displayed, and a pie chart (graph) is displayed in each area divided by the flood inundation assumed area. The flood inundation assumed area is color-coded according to a preset inundation depth rank. The pie chart consists of a circle indicating the number of evacuees in each area and concentric circles provided outside this circle indicating the number of evacuees for each evacuation form. The pie chart is color-coded according to the inundation situation and evacuation form. In the example of the figure, the case of in-house evacuation in the case of under-floor flooding is displayed in yellow, the case of vertical evacuation in the case of above-floor flooding is displayed in orange, and the case of horizontal evacuation in the case of top-floor flooding is displayed in red. Thereby, the number of evacuees for each evacuation form in each area can be easily grasped. Note that the present invention is not limited to a pie chart, and it may be displayed as a bar graph or a band graph that combines the number of evacuees and the subtotals by evacuation form.

[0028] The management control means 20 controls the operation of each of the above means 12 to 18, and may be configured to include, for example, a computer (information terminal) consisting of a CPU and various memories. This management control means 20 may include a display change unit 22, a building list display control unit 24, a selected building display control unit 26, a character input unit 28, a character search unit 30, a search result display control unit 32, a vehicle road display control unit 34, and the like.

[0029] The display change unit 22 enlarges, reduces or moves the background map to change the display mode of the display means 18. The display content may be switched according to the rank of the expected flood area, "planned scale" or "maximum expected scale". The display change unit 22 can be configured using, for example, a GIS user interface. The example of FIG. 4 shows a case where a zoom-in / zoom-out button and a switch for switching between planned scale and maximum expected scale are provided in the display screen. The display mode is at least one of the display scale and display range of the background map. Note that the evacuation number estimation means 16 estimates the number of evacuees required for each building only once when the flood depth for each building is determined, so thereafter, the display means 18 re-divides the area and re-estimates the number of evacuees required for each area according to the change made by the display change unit 22, thereby redisplaying the area. FIG. 5 shows an example of a display after the display mode has been changed.

[0030] The building list display control unit 24 displays a list of building attribute information of buildings present on the displayed background map in a predetermined order. For example, when the user enlarges the background map to a certain scale or more using the display change unit 22, attribute information such as the names of each building present within the display range of the background map is displayed as a list on the same display screen. If the information is displayed in an easy-to-understand and compact manner on the same display screen, it is easy to understand. In this case, the order of the list may be in ascending (or descending) order of attributes having a magnitude relationship such as flood depth rank. If the flood depth rank is displayed in descending order, the priority of response actions becomes clear and efficient. The example of FIG. 4 shows a case where the names of buildings are displayed in descending order of flood depth rank. By displaying the background map on a large scale, local response personnel can easily understand the location and route of the target building even if they are unfamiliar with the local geography.

[0031] The selected building display control unit 26 displays a building selected from the displayed list in an exaggerated or enlarged form compared to the standard form at the corresponding position on the background map, and also displays attribute information of the building in a pop-up from the corresponding position on the background map. For example, when the user selects and inputs building attribute information such as the name of a building in the list, the building is displayed in an exaggerated or enlarged form on the background map, and the building attribute information of the building is also displayed in a pop-up.

[0032] The character input unit 28 is for inputting character information for character search. In the example of Fig. 4, it is composed of an input field provided in the display screen and a keyboard device (not shown) for inputting character information into this input field.

[0033] The character search unit 30 searches the data management means 14 for buildings whose building attribute information partially matches the character information entered in the input field. This makes it possible to quickly search and extract from a large number of buildings specific buildings, such as important buildings that require a prompt response regardless of the extent of damage. This makes it possible to give priority to the investigation and restoration of important buildings.

[0034] The search result display control unit 32 displays a list of building attribute information of buildings obtained by the search. When the search returns a hit that partially matches the character string in the input field, the search result display control unit 32 displays the names, etc. of those buildings as a list. It may be displayed as shown in FIG. 4. When the user selects and inputs a building in the list, the selected building display control unit 26 displays the selected and input building in an exaggerated or enlarged form from the standard form at the corresponding position, etc. on the background map, and also displays the building attribute information of the building in a balloon from the corresponding position, etc. on the background map.

[0035] The vehicle road display control unit 34 displays roads that are passable by vehicles on a background map. When a flood occurs, roads may be inundated and impassable. Therefore, based on, for example, the flood depth and the road surface height of the road, it estimates which roads are passable by vehicles and which are impassable. By displaying the estimated results superimposed on the background map, it is possible to easily grasp which roads are passable and which are impassable. This allows the user to quickly and efficiently set a route for the vehicle.

[0036] Next, the operation and function of the above configuration will be described. Before a flood occurs, flood information including expected flood areas and flood depth is acquired by the flood information acquisition means 12. The number of people requiring evacuation estimation means 16 estimates the number of people requiring evacuation for each evacuation form based on the flood information acquired by the flood information acquisition means 12 and the building attribute information and building number of people information registered in the data management means 14. The display means 18 displays the estimated number of people for each evacuation form in a pie chart in the corresponding area on the background map.

[0037] In this way, it will be possible to grasp the number of people who need to evacuate in many buildings widely distributed in the expected flood zone before the flood occurs, by area and by evacuation method, which will improve the speed and efficiency of response actions when a flood occurs.

[0038] In addition, when a flood occurs, the number of people who need to evacuate may be estimated and displayed using the above procedure. In this way, the situation of people who need to evacuate in many buildings widely distributed in the disaster area can be estimated in a short time, and the result can be displayed on an information terminal together with related location information in an easy-to-understand manner, allowing for quick and efficient support for evacuees and investigation of buildings.

[0039] In particular, simultaneous flood disasters cause flood damage to many buildings over a wide area, and many people are forced to evacuate. In order to quickly investigate and recover from the damage, it is necessary to quickly grasp the outline of the spatial distribution, such as which areas have the most damaged buildings and people who need to evacuate. The present invention is extremely useful in this case. By grasping the spatial distribution, it is possible to plan and implement efficient response measures, such as how many response personnel are needed, where and to where and which route to take when dispatching response personnel from outside the area, from which areas and buildings to support evacuation, and when to start investigation and recovery.

[0040] As described above, according to the system for estimating the number of people requiring evacuation in a flood of the present invention, the system estimates the number of people requiring evacuation in the event of a flood, and is equipped with a flood information acquisition means for acquiring flood information including expected flooded areas and flood depths where flooding is expected due to a flood, a data management means in which building attribute information indicating attributes including the position and three-dimensional shape of each building and building number of people information indicating the number of people residing or staying in the buildings are registered, a number of people requiring evacuation estimation means for estimating the number of people requiring evacuation for each building included in the expected flooded area and for each evacuation type set based on the flood depth at the location of the building, based on the flood information acquired by the flood information acquisition means and the building attribute information and building number of people information of each building registered in the data management means, and a display means for displaying the number of people requiring evacuation estimated by the number of people requiring evacuation estimation means in a corresponding area on a background map in the form of a predetermined graph, thereby making it possible to estimate and display the number of people requiring evacuation in the event of a flood.

[0041] In addition, according to another flood evacuation number estimation system of the present invention, the inundation information acquisition means acquires the inundation information for each specified hour due to flood occurrence, the number of people needing evacuation estimation means estimates the number of people needing evacuation for each specified hour, and the display means displays the number of people needing evacuation for each specified hour, so that the number of people needing evacuation for each hour due to flood occurrence can be estimated and displayed.

[0042] In addition, according to another flood evacuation requiring evacuation estimation system of the present invention, the display means displays the number of people needing evacuation in the form of a pie chart consisting of a circle indicating the number of people needing evacuation and concentric circles placed outside the circle indicating the number of people needing evacuation for each form of evacuation, so that the number of people needing evacuation for each form of evacuation can be easily grasped.

[0043] The "Sustainable Development Goals (SDGs)" are 17 international goals that were adopted at the United Nations Summit in September 2015. The flood evacuation number estimation system according to this embodiment can contribute to the achievement of the 17 SDGs, for example, goal 11, "Sustainable cities and towns." [Industrial Applicability]

[0044] INDUSTRIAL APPLICABILITY As described above, the flood evacuation requirement number estimation system according to the present invention is useful for evacuation support during flood disasters, and is particularly suitable for estimating the number of people requiring evacuation when a flood occurs. [Explanation of symbols]

[0045] 10. Flood evacuation estimate system 12 Flood information acquisition means 14 Data Management Measures 16. Methods for estimating the number of people requiring evacuation 18 Display means 20 Management Control Measures 22 Display change section 24 Building list display control section 26 Selected building display control section 28 Character input section 30 Character Search Section 32 Search result display control section 34 Vehicle road display control unit

Claims

1. A flood evacuation number estimation system that estimates the number of people who need to evacuate when a flood occurs, comprising: A flood information acquisition means for acquiring flood information including an area expected to be flooded due to flooding and a flood depth; A data management means in which building attribute information indicating attributes including the location and three-dimensional shape of each building and building number of people information indicating the number of people residing or staying in the building are registered; a number-of-people-required-evacuation-needed estimation means for estimating the number of people who need to evacuate for each building included in the expected flooding area and for each evacuation form set based on the flood depth at the location of the building, based on the flooding information acquired by the flooding information acquisition means, and the building attribute information and building occupancy information of each building registered in the data management means; A flood evacuation number estimation system characterized by comprising a display means for displaying the number of people requiring evacuation estimated by the means for estimating the number of people requiring evacuation in a corresponding area on a background map in a specified graph.

2. The flood evacuation number estimation system described in claim 1, characterized in that the flood information acquisition means acquires the flood information for each specified time due to flood occurrence, the number of people requiring evacuation estimation means estimates the number of people requiring evacuation for each specified time, and the display means displays the number of people requiring evacuation for each specified time.

3. The flood evacuation number estimation system described in claim 1 or 2, characterized in that the display means displays the number of people needing evacuation in a pie chart consisting of a circle indicating the number of people needing evacuation and concentric circles arranged outside the circle indicating the number of people needing evacuation for each evacuation method.

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