Damage amount calculation device, control method for damage amount calculation device, and program

Abstract

To minutely calculate an amount of damage of a building in a case of a flood disaster in more conformity with the actual state.SOLUTION: A damage amount calculation device for calculating an amount of damage of a building in a case of a flood disaster comprises: a building information acquisition part that acquires building information including a construction location of the building, a price of a building body, a price of equipment, and location information of important equipment; a coefficient storage part that stores a first coefficient, a second coefficient, and a third coefficient; a water immersion height acquisition part that acquires a height of a water immersion surface in a case of a flood disaster; a first damage amount calculation part that calculates a first amount of damage by using the price of the building body and the first coefficient; a second damage amount calculation part that identifies water immersed equipment based on the location information of the important equipment and the height of the water immersion surface and calculates a second amount of damage by using the price of the water immersed equipment and the second coefficient; a third damage amount calculation part that calculates a third amount of damage by using a price of non-critical equipment and the third coefficient; and a building damage amount calculation part that calculates the amount of damage of the building based on calculation results of the first amount of damage, the second amount of damage, and the third amount of damage.SELECTED DRAWING: Figure 17

Description

[Technical Field]

[0001] The present invention relates to a damage calculation device, a control method for a damage calculation device, and a program. [Background technology]

[0002] In recent years, there have been frequent heavy rains, river flooding, and rising water levels in various parts of the country, increasing the risk of flooding due to external and internal flooding. Flooding can cause significant damage not only to relatively small buildings such as detached houses, but also to relatively large buildings such as apartment buildings, office buildings, and commercial facilities.

[0003] In recent years, the Task Force on Climate-related Financial Disclosures (TCFD), established by the Financial Stability Board (FSB), has recommended the disclosure of climate-related information that has a financial impact, and various companies have begun to incorporate the risks of climate change into their management strategies.

[0004] In this case, the damage to buildings in the event of a flood must be quantified in advance, but calculating the amount of damage in the event of such a flood is not easy.

[0005] Therefore, the amount of damage to buildings in the event of a flood is often calculated by calculating the amount of flood damage as a probability distribution, as described in Patent Document 1, or by using an empirical formula relating the flooding conditions and building damage rates in past floods, as described in Non-Patent Document 1. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-004212 [Non-patent literature]

[0007] [Non-Patent Document 1] Flood Control Economic Survey Manual (Draft), April 2020, Ministry of Land, Infrastructure, Transport and Tourism Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the case of large buildings such as apartment buildings and commercial facilities, the locations of certain equipment that plays an important role in the functioning of the building, such as power receiving equipment and air conditioning equipment, vary greatly from building to building. In cases where such equipment is installed on higher floors or where flood prevention measures have been taken in advance, flood damage will not occur, and methods that use the above-mentioned probability distributions and past empirical formulas may result in predicted damage amounts that differ significantly from the actual damage amounts.

[0009] Therefore, there is a need for technology that takes into account these differences between buildings and enables more detailed calculations of damage amounts in the event of a flood to be made in accordance with actual conditions.

[0010] The present invention has been made in consideration of these problems, and aims to provide a damage calculation device, a control method for a damage calculation device, and a program that can calculate the amount of damage to a building in the event of a flood in a more detailed manner that is in line with actual conditions. [Means for solving the problem]

[0011] A damage calculation device according to one embodiment of the present invention is a damage calculation device for calculating the amount of damage to a building when a flood occurs, and includes a building information acquisition unit that acquires building information including the construction location of the building, the price of the building itself, the price of equipment attached to the building itself, and location information of important equipment among the equipment that is determined to be important equipment for the functioning of the building, a coefficient storage unit that stores a first coefficient for calculating the amount of damage to the building when a flood occurs, a second coefficient for calculating the amount of damage to the important equipment when a flood occurs, and a third coefficient for calculating the amount of damage to non-important equipment that is equipment other than the important equipment when a flood occurs, and a flood calculation unit that acquires the height of the flood surface at the construction location when a flood occurs. The device is equipped with a height acquisition unit, a first damage amount calculation unit that calculates a first damage amount, which is the amount of damage to the main body, using the price of the main body and the first coefficient, a second damage amount calculation unit that identifies important equipment that is expected to be flooded in the event of a flood as flooded equipment based on the location information of each of the important equipment and the height of the flood surface, and calculates a second damage amount, which is the amount of damage to the important equipment, using the price of the flooded equipment and the second coefficient, a third damage amount calculation unit that calculates a third damage amount, which is the amount of damage to the non-important equipment, using the price of the non-important equipment and the third coefficient, and a building damage amount calculation unit that calculates the amount of damage to the building in the event of a flood based on the calculation results of the first damage amount, the second damage amount, and the third damage amount.

[0012] In addition, the problems and solutions disclosed in this application will be made clear by the description in the section on the preferred embodiment of the invention and the drawings. [Effects of the Invention]

[0013] It will be possible to calculate the amount of damage to buildings in the event of a flood in a more detailed manner that reflects the actual situation. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a diagram for explaining buildings that are the subject of calculation of damage amounts in the event of flooding. [Figure 2] FIG. 2 is a diagram illustrating a hardware configuration of a damage amount calculation device. [Figure 3] FIG. 2 is a diagram illustrating a storage device of the damage amount calculation device. [Figure 4] FIG. 10 is a diagram showing basic information. [Figure 5] FIG. 10 is a diagram showing building information. [Figure 6] FIG. 10 is a diagram showing the replacement cost of the building itself. [Figure 7] FIG. 10 is a diagram showing important facility location information. [Figure 8] FIG. 10 is a diagram showing information on flood prevention installations. [Figure 9] FIG. 10 is a diagram illustrating examples of building types. [Figure 10] FIG. 10 is a diagram for explaining a first coefficient. [Figure 11] FIG. 10 is a diagram for explaining a second coefficient. [Figure 12] FIG. 10 is a diagram for explaining a third coefficient. [Figure 13] FIG. 2 is a diagram illustrating a functional configuration of a damage amount calculation device. [Figure 14] FIG. 10 is a flowchart showing the flow of processing by the damage amount calculation device. [Figure 15] FIG. 10 is a diagram illustrating an example of a flood risk report. [Figure 16] FIG. 10 is a diagram showing an example of calculation of the second damage amount L2. [Figure 17] FIG. 10 is a diagram showing a calculation formula for the damage amount L. DETAILED DESCRIPTION OF THE INVENTION

[0015] At least the following matters will become apparent from the description of this specification and the accompanying drawings. Hereinafter, the present invention will be described in accordance with one embodiment thereof with reference to the accompanying drawings. ==Calculating the amount of damage== An example of a building 400 for which the amount of flood damage is to be calculated is shown in Figure 1. The building 400 shown in Figure 1 is a building with nine above-ground floors and one basement floor.

[0016] In this embodiment, the building 400 that is the subject of damage calculation is a relatively large non-wooden structure such as an apartment building, office building, commercial facility, etc. As shown in Fig. 9 as a specific example, the building 400 may be a general office building, a large office building, a general apartment building, a high-rise apartment building, a logistics warehouse, a city commercial facility, a suburban large-scale commercial facility, a lodging facility, a city complex, etc.

[0017] As shown in FIG. 1, the building 400 is configured to have a main body 410 including a foundation, walls, pillars, floors, beams, etc., and facilities 450 attached to the main body 410.

[0018] The facilities 450 include important facilities 420, which are defined as facilities that play an important role in the functioning of the building 400, and non-important facilities 430 other than the important facilities.

[0019] As shown in Fig. 7, 12 types of critical facilities 420 are defined: power receiving and transforming facilities, electric power company rented rooms, communication and evacuation disaster prevention facilities, emergency generators, firefighting disaster prevention facilities, air conditioning facilities, district heating and cooling supply companies, water supply facilities, gas facilities, communication facilities, elevator landing floors, and mechanical parking facilities. The installation locations of these critical facilities 420 can be determined relatively freely within the building 400, and the installation locations vary greatly depending on the building 400. For example, as shown in Fig. 1, they can also be installed on the roof or in the basement.

[0020] In contrast, non-essential equipment 430 is various wiring and piping such as power wiring, gas piping, and water supply and drainage piping, and is equipment 450 that is installed relatively evenly in various locations in building 400.

[0021] The building 400 shown in FIG. 1 is also provided with a flood prevention installation 440 .

[0022] The flood prevention installations 440 are installations such as sandbags, water bags, waterproof boards, water stops, and waterproof shutters that prevent water from entering the building 400 from the outside in the event of a flood. By setting a flood prevention line to surround the building 400 and installing flood prevention installations 440 such as water stops along all flood routes on the flood prevention line, flooding into the building 400 can be prevented.

[0023] However, in the example shown in Figure 1, the flood level (WL) at the time of flooding exceeds the height of the flood prevention installation 440 (i.e., the flood line height), and water crosses the flood line and seeps into the building 400. In this case, the equipment 450 installed underground in Figure 1 will suffer flood damage. However, even in this case, there is no flood damage to the equipment 450 installed in a position higher than the flood level, such as on the roof or on a high floor.

[0024] In contrast, if the flood level (WL) at the time of flooding is lower than the height of the flood prevention installation 440, the water will not exceed the flood line and will not infiltrate the interior of the building 400. Therefore, equipment 450 installed inside the flood line will not suffer flood damage. However, even in this case, equipment 450 installed outside the flood line and at a position lower than the flood level will suffer flood damage.

[0025] In this way, whether or not the facility 450 will suffer flood damage depends on the installation location of the facility 450, the height of the flood prevention installation 440, and the flood level at the time of flood damage.

[0026] Therefore, in order to calculate the amount of damage to the building 400 in the event of a flood in a more detailed manner based on the actual situation, it is important to identify whether or not each of these pieces of equipment 450 will be flooded in the event of a flood.

[0027] However, in a large building 400 such as an apartment building or office building, it is not realistic to determine whether or not all of the facilities 450 will be flooded. Furthermore, non-critical facilities 430 such as pipes and wiring are installed almost uniformly throughout the building 400. Therefore, it is possible to roughly calculate the amount of damage to the non-critical facilities 430 if it is possible to determine the extent to which the flooded portion of the entire building 400 is affected. The same is true for the amount of damage to the main body 410 of the building 400; it is possible to roughly calculate the amount of damage if it is possible to determine the extent to which the flooded portion of the entire main body 410 is affected.

[0028] In contrast, as mentioned above, the critical facilities 420 are installed in different locations depending on the building 400. Furthermore, the critical facilities 420 are often composed of complex control machines and large-scale structures, and the costs required for repairs, inspections, replacement, etc. after being damaged by flooding are large. Therefore, when calculating the damage amount for the critical facilities 420, it is important to first determine whether each piece of critical facility 420 will be flooded or not, and then calculate the damage amount.

[0029] For the above reasons, in this embodiment, the damage amount L to the building 400 in the event of a flood is calculated by dividing it into the damage amount L1 to the main body 410, the damage amount L2 to the important equipment 420, and the damage amount L3 to the non-important equipment 430. This configuration makes it possible to calculate the damage amount to the building 400 in the event of a flood in more detail in line with the actual situation.

[0030] This will be explained in detail below. ==Damage calculation device== 2 shows the hardware configuration of a damage calculation device 200 according to one embodiment of the present invention. The damage calculation device 200 is a computer such as a personal computer, server, smartphone, or tablet that calculates the amount of damage to a building 400 when flood damage occurs, and is operated, for example, by a business operator that provides a service for calculating the amount of damage to a building 400 when flood damage occurs.

[0031] The damage amount calculation device 200 comprises a CPU (Central Processing Unit) 210 , a memory 220 , a communication device 230 , a storage device 240 , an input device 250 , an output device 260 , and a recording medium reading device 270 .

[0032] The storage device 240 stores various programs and data executed by the CPU 210. These programs and data are then read into the memory 220 and executed or processed by the CPU 210, thereby realizing various functions of the damage amount calculation device 200.

[0033] Here, the storage device 240 is a non-volatile storage device such as a hard disk, a solid state drive (SSD), or a flash memory.

[0034] As shown in FIG. 3, the storage device 240 stores a damage calculation device control program 700, basic information 600, building information 610, a first coefficient 620, a second coefficient 630, a third coefficient 640, and flood management information 650.

[0035] The recording medium reader 270 reads the damage amount calculation device control program 700 and data recorded on a recording medium 800 such as a CD, DVD, or SD card, and stores them in the storage device 240 .

[0036] The communication device 230 is communicably connected to other information processing devices (not shown) via the network 500, and transmits and receives the damage amount calculation device control program 700 and various data. For example, the above-mentioned damage amount calculation device control program 700 and various data can be stored in another computer, and the damage amount calculation device 200 can download the damage amount calculation device control program 700 and data from this computer.

[0037] The input device 250 is a device such as various buttons, switches, a mouse, a keyboard, etc. that accepts input of commands and data by the operator of the damage amount calculation device 200.

[0038] The output device 260 is, for example, a display device such as a display, a speaker, or the like.

[0039] The network 500 is any of various information and communication networks such as the Internet, a LAN (Local Area Network), and a telephone network.

[0040] The damage amount calculation device 200 may be configured with one information processing device or multiple information processing devices. The damage amount calculation device 200 may also be a virtual machine or a cloud computer. <Basic information> An example of the basic information 600 stored in the storage device 240 is shown in Fig. 4. The basic information 600 includes information such as the construction location of the building 400, and is input into the damage amount calculation device 200 and stored in the storage device 240 when a client, such as the owner or manager of the building 400, requests a calculation of the amount of damage to the building 400 in the event of a flood, for example. In the example shown in Fig. 4, the basic information 600 includes information such as the client's name, property name, address, completion date, building type, and number of floors of the building.

[0041] The building 400 for which the damage amount calculation device 200 calculates the damage amount is a relatively large non-wooden structure such as a building or apartment building, as shown in FIG.

[0042] As will be described in more detail later, the damage amount calculation device 200 obtains predicted results of flood damage expected in the area (such as the expected depth of flooding in the event of a flood) based on information (address) regarding the construction location of the building 400 contained in the basic information 600.

[0043] The damage amount calculation device 200 may acquire the results of hazard maps and flood simulations published by various organizations such as the national government, local governments, companies, and universities as flood prediction results, or may acquire the results of flood simulations performed by the damage amount calculation device 200 or an information processing device not shown as flood prediction results.

[0044] However, in doing so, as an example, for flood damage caused by external flooding, the results of flood forecasts based on precipitation with an annual exceedance probability of 1 / 200 are obtained, and for flood damage caused by inland flooding, the results of flood forecasts based on precipitation of the maximum expected scale (annual exceedance probability of 1 / 1000) are obtained. By determining the expected scale of flood damage in this way, it becomes possible to calculate the amount of flood damage under the same conditions for buildings 400 located anywhere in the country. This also makes it possible to compare the flood resilience of multiple buildings 400.

[0045] In some areas, it may be difficult to obtain flood forecast results that match the above-mentioned annual exceedance probability. In such cases, it is advisable to obtain forecast results for floods of a similar scale. For example, in the case of inland flooding, it may be possible to use forecast results for floods with an annual exceedance probability of 1 / 1024 or 1 / 1100. This approach makes it possible to prevent situations where flood forecast data cannot be obtained and damage calculations become impossible.

[0046] Based on the results of the flood prediction, the damage amount calculation device 200 then generates, as flood management information 650, a flood risk report 300 that describes the expected flood depth in the event of external and internal flooding in the area surrounding the construction site of the building 400. As an example, the flood risk report 300 shown in Fig. 15 describes the flood depth in the event of external flooding.

[0047] By referring to this flood risk report 300, the client can learn information such as the depth of flooding in the event of a flood at the construction site of the building 400. <Building Information> Next, building information 610 stored in storage device 240 is shown in Figure 5. Building information 610 includes the construction location of building 400, the price of main body 410 of building 400, the price of equipment 450 attached to main body 410, and location information for each of important equipment 420. Building information 610 is information provided by the client with reference to the above-mentioned flood risk report 300, and in the example shown in Figure 5, includes information on property name 611, address 612, building type 613, number of floors of building 614, building replacement cost 615, important equipment location information 616, flood prevention installation information 618, and flood height 619.

[0048] The property name 611 , address 612 , building type 613 , and number of floors 614 are the same as the information contained in the basic information 600 .

[0049] The building replacement cost 615 is information that serves as the basis for calculating the damage amount to the main body 410 and the equipment 450, and as shown in Figure 6, it lists the replacement costs of each of the structural work, electrical equipment, etc., and the total of these.

[0050] The important equipment location information 616 is information that includes location information for each of the important equipment 420 provided in the building 400. An example of the important equipment location information 616 is shown in Fig. 7. In Fig. 7, the location information for the important equipment 420 includes "installation height evaluation" (first information), "flood prevention line plan evaluation" (second information), and "flood prevention line height evaluation" (third information).

[0051] Specifically, for "Installation Height Evaluation," as shown in Figure 7(A), it is determined whether each important facility 420 is above or below the maximum flood level. Here, the maximum flood level refers to the greater of the flood level during external flooding and the flood level during internal flooding. For "Flood Control Line Plane Evaluation," as shown in Figure 7(B), it is determined whether each important facility 420 is inside the flood control line. For "Flood Control Line Height Evaluation," as shown in Figure 7(C), it is determined whether the maximum flood level is equal to or higher than the height of the flood control line.

[0052] The flood prevention installation information 618 includes information indicating the height of the flood prevention line of the building 400. In the example shown in Fig. 8, the height of the flood prevention line is 1 meter (meter), which is the height of the waterproof board installed on the building 400.

[0053] Although not shown, the flood height 619 indicates the greater of the height of the flood surface (flood level) in the event of external flooding at the construction site of the building 400 and the height of the flood surface (flood level) in the event of internal flooding, but it may also indicate both the greater and smaller values. The flood level can be calculated by adding the flood depth (listed in the flood risk report 300) to the elevation of the construction site of the building 400.

[0054] This makes it possible to accurately identify the flood level even if the ground level used when a local government or other organization conducts a flood analysis differs from the reference point (GL) of building 400. <First coefficient> Returning to Fig. 3, we will explain the first coefficient 620 stored in the storage device 240. The first coefficient 620 is a coefficient determined for calculating the amount of damage to the main body 410 of the building 400 in the event of a flood, and represents the extent to which the flooded portion of the entire main body 410 of the building 400 is flooded. The first coefficient 620 is shown in Fig. 10 and formula (1).

[0055] 1st coefficient = α(N)×rb(h) …(1) Here, N is the number of floors of the building 400, and h is the flood level, both of which can be obtained from the building information 610. Also, α(N) and rb(h) are defined as shown in the first coefficient definition table A621 and the first coefficient definition table B622 in FIG. 10, respectively.

[0056] As a result, the first coefficient is set to a larger value the higher the flood level h, but a smaller value the higher the number of floors N of the building 400. In this way, the first coefficient represents the extent to which the entire main body 410 is flooded (corresponding to the proportion of the flooded area).

[0057] Then, the damage amount calculation device 200 calculates the damage amount L1 of the main body 410 using a calculation formula such as that shown in formula (2).

[0058] L1 = 1st coefficient × (repurchase price of the main body vb - construction cost of the main body) ... (2) Here, the replacement cost vb of the main body and the structural work price can be obtained from the building replacement price 615. In formula (2), the part "replacement cost vb of the main body - structural work price of the main body" corresponds to the price of the main body 410, which is the basis for calculating the damage amount L1 of the main body 410. The reason why the price of the main body 410 is determined by subtracting the structural work price from the replacement cost vb of the main body 410 is that the structural part of the building 400 suffers almost no damage even in the event of flood damage.

[0059] In this manner, the damage amount calculation device 200 can calculate the damage amount L1 of the main body 410 using the first coefficient 620, which represents the degree of flooding within the entire main body 410, and the price of the main body 410.

[0060] Alternatively, the damage amount calculation device 200 may calculate the damage amount L1 of the main body 410 using equation (3) and a calculation formula shown in FIG.

[0061] L1 = 1st coefficient × (repurchase price of the main body on the ground floor vb1 - ground floor portion of the framework construction price) + (basement replacement cost vb2 - basement portion of structural construction cost) ... (3) In this case, the basement floor portion of the main body 410 can be treated as a total loss and the damage amount L1 can be calculated.

[0062] Furthermore, in equations (2) and (3), if the flood level does not exceed the height of the flood prevention line, L1 may be set to A1 (constant). If the flood level does not exceed the height of the flood prevention line, it is considered that the damage amount L1 to the main body 410 will be kept to a minimum, so A1 can be set to a minimum fixed amount required for inspecting the main body 410, etc. In this case, the value of A1 should be determined based on the actual damage amounts to the main body 410 of various buildings 400, such as 0 yen or 1 million yen. This method makes it possible to calculate the damage amount L1 to the main body 410 in more detail and in line with the actual situation. <Second coefficient> Returning to Fig. 3, the second coefficient 630 stored in the storage device 240 will be described. The second coefficient 630 is a coefficient determined for calculating the amount of damage to the critical equipment 420 in the event of a flood. The second coefficient 630 is shown in Fig. 11 and formula (4).

[0063] Second coefficient = Rij …(4) 11, the second coefficient Rij is determined for each type i of important equipment 420 and each type j of building 400. As shown in the second coefficient definition table 631, there are 12 types i of important equipment 420 (i=1 to 12). Also, there are 10 types j of buildings 400 (j=1 to 10).

[0064] The values ​​entered in the second coefficient definition table 631 are obtained by investigating the damage amounts of important facilities 420 in actual past flood disasters. For example, if the type of building 400 is a logistics warehouse, the damage amounts of the power receiving and transforming facilities tend to be greater than those of other types of buildings 400 because the power receiving and transforming facilities are often installed on relatively low floors, and the second coefficient may be a larger value than those of other types of buildings 400.

[0065] The damage amount calculation device 200 then identifies the type j of the building 400 for which the damage amount is to be calculated by referring to the building information 610, and calculates the damage amount L2 of the important equipment 420 using a calculation formula such as that shown in equation (5).

[0066] L2 = Σ (replacement cost Vi of the type of equipment to which critical equipment i belongs × second coefficient Rij × Flooding flag Fi for critical equipment i) … (5) Here, since there are 12 types of important equipment 420, i ranges from 1 to 12. The replacement cost Vi of the equipment type to which important equipment i belongs can be obtained from the replacement cost 615 of the building.

[0067] In addition, the flooding flag Fi of important equipment i is determined by the damage amount calculation device 200 based on the location information of important equipment 420 listed in the important equipment location information 616 ("Installation height evaluation," "Flood prevention line plane evaluation," "Flood prevention line height evaluation").

[0068] For example, if the flood level (WL) at the time of flooding is lower than the height of the flood prevention installation 440 (height of the flood prevention line), the important facilities 420 inside the flood prevention line will not be flooded. However, even in this case, important facilities 420 installed outside the flood prevention line and at a position lower than the flood level will be flooded.

[0069] On the other hand, if the flood level (WL) at the time of flooding is higher than the height of the flood prevention installation 440, important equipment 420 installed below the flood level will be flooded even if it is installed inside the flood prevention line. However, important equipment 420 installed above the flood level will not be flooded.

[0070] In this way, the damage amount calculation device 200 identifies important facilities 420 that are expected to be flooded in the event of a flood as flooded facilities 421, and sets the value of the flood presence / absence flag Fi of important facilities i for flooded facilities 421 to 1, and sets the value of the flood presence / absence flag Fi of important facilities i for non-flooded important facilities 420 to 0. Therefore, using equation (5), the damage amount calculation device 200 calculates the sum of the products of the prices of the flooded facilities 421 and the second coefficient 630 as the second damage amount L2, which is the damage amount to the important facilities 420.

[0071] In this manner, the damage amount calculation device 200 can calculate the amount of damage after determining whether or not each important piece of equipment 420 is flooded. This makes it possible to calculate the amount of damage to the building 400 in the event of a flood in a more detailed manner based on the actual situation. <Third coefficient> Returning to Fig. 3, we will explain the third coefficient 640 stored in the storage device 240. The third coefficient 640 is a coefficient determined for calculating the amount of damage to non-critical equipment 430 in the event of a flood, and represents the extent to which the flooded portion of the entire non-critical equipment 430, which is widely installed throughout the building 400, is flooded. The third coefficient 640 is shown in Fig. 12 and formula (6).

[0072] 3rd coefficient = β(N)×re(h) …(6) Here, N is the number of floors of the building 400, and h is the flood level, both of which can be obtained from the building information 610. β(N) and re(h) are defined as shown in the third coefficient definition table A641 and the third coefficient definition table B642 in FIG. 12, respectively.

[0073] As a result, the third coefficient is set so that the higher the flood level h, the larger the value becomes, but the higher the number of floors N of the building 400, the smaller the value becomes. In this way, the third coefficient represents the extent to which the non-critical equipment 430 is flooded (equivalent to the proportion of the flooded area).

[0074] Then, the damage amount calculation device 200 calculates the damage amount L3 of the non-critical equipment 430 using a calculation formula such as that shown in formula (7).

[0075] L3 = 3rd coefficient × replacement cost of non-critical equipment ve … (7) Here, the replacement cost ve of the non-critical equipment can be obtained from the replacement cost 615 of the building (the total amount of the replacement cost of the non-critical equipment 430 in FIG. 6).

[0076] In this manner, the damage amount calculation device 200 can calculate the damage amount L3 of the non-critical equipment 430 using the third coefficient 640, which represents the degree of flooding within the entire non-critical equipment 430, and the replacement price of the non-critical equipment 430.

[0077] Alternatively, the damage amount calculation device 200 may calculate the damage amount L3 of the non-important equipment 430 using equation (8) and a calculation formula as shown in FIG.

[0078] L3 = 3rd coefficient x replacement cost of non-critical equipment on the ground floor ve1 + Replacement cost of non-critical equipment in the basement ve2 …(8) In this case, the basement floor portion of the non-critical equipment 430 can be treated as a total loss and the damage amount L3 can be calculated.

[0079] Furthermore, in equations (7) and (8), if the flood level does not exceed the height of the flood prevention line, L3 may be set to A3 (constant). If the flood level does not exceed the height of the flood prevention line, the damage amount L3 to the non-critical equipment 430 is likely to be kept to a minimum, so A3 can be set to a minimum fixed amount required for inspecting the non-critical equipment 430. In this case, the value of A3 may be determined based on the actual damage amounts to the non-critical equipment 430 in various buildings 400, such as 0 yen or 1 million yen. This method makes it possible to calculate the damage amount L3 to the non-critical equipment 430 in more detail and in line with the actual situation. <Flood Management Information> Returning to Fig. 3, the flood management information 650 stored in the storage device 240 will be described. The flood management information 650 is, for example, the flood risk report 300 illustrated in Fig. 15. As described above, in this embodiment, for floods caused by external flooding, the flood risk report 300 is created using the results of flood predictions made assuming precipitation with an annual exceedance probability of 1 / 200, and for floods caused by internal flooding, the flood risk report 300 is created using the results of flood predictions made assuming precipitation of the maximum expected scale (annual exceedance probability of 1 / 1000).

[0080] This makes it possible to compare the damage amounts of buildings 400 across the country under the same conditions.

[0081] As mentioned above, if it is difficult to obtain flood forecast results that match the above-mentioned annual exceedance probability, it is advisable to obtain forecast results for floods of a similar scale. This makes it possible to prevent a situation in which flood forecast data cannot be obtained and damage calculations become impossible. <Functional configuration of the damage calculation device> Next, the functional configuration of the damage amount calculation device 200 will be described with reference to the functional configuration diagram shown in FIG.

[0082] As described above, the damage amount calculation device 200 realizes various functions as the damage amount calculation device 200 by reading the damage amount calculation device control program 700 and various data stored in the storage device 240 into the memory 220 and executing or processing them by the CPU 210.

[0083] Specifically, the damage amount calculation device 200 has the functions of a building information acquisition unit 201, a coefficient memory unit 202, a flood height acquisition unit 203, a first damage amount calculation unit 204, a second damage amount calculation unit 205, a third damage amount calculation unit 206, and a building damage amount calculation unit 207.

[0084] The building information acquisition unit 201 acquires building information 610 including the construction location of the building 400, the price of the main body 410 of the building 400, the price of the equipment 450 attached to the main body 410 of the building 400, and the location information of each of the important equipment 420 among the equipment 450 that is defined as equipment that plays an important role in the functioning of the building 400.

[0085] In this embodiment, the building information 610 is provided by a client who has referred to the flood risk report 300 for the area including the construction site of the building 400, and is stored in the damage amount calculation device 200.

[0086] The coefficient storage unit 202 stores a first coefficient 620 for calculating the amount of damage to the main body 410 when a flood occurs, a second coefficient 630 for calculating the amount of damage to the important equipment 420 when a flood occurs, and a third coefficient 640 for calculating the amount of damage to the non-important equipment 430 when a flood occurs. In this embodiment, the coefficient storage unit 202 is embodied as a storage device 240.

[0087] The flood level acquisition unit 203 acquires the height of the flood surface when a flood occurs at the construction site of the building 400. In this embodiment, the flood level acquisition unit 203 acquires the flood level 619 included in the building information 610 as the height of the flood surface.

[0088] The height of the flood surface includes the greater of the height of the flood surface at the construction site of the building 400 in the event of external flooding (first height) and the height of the flood surface at the event of internal flooding (second height). The first height is the flood level calculated by adding the flood depth at the event of external flooding to the elevation of the construction site of the building 400. Similarly, the second height is the flood level calculated by adding the flood depth at the event of internal flooding to the elevation of the construction site of the building 400.

[0089] The first damage amount calculation unit 204 calculates the first damage amount L1, which is the amount of damage to the main body 410, using the price of the main body 410 and the first coefficient 620. In this embodiment, the first damage amount calculation unit 204 calculates the first damage amount L1 using formula (2) or formula (3).

[0090] The second damage amount calculation unit 205 identifies the important facilities 420 that are expected to be flooded in the event of a flood as flooded facilities 421 based on the location information of each of the important facilities 420 and the height of the flood surface (maximum flood level), and calculates the second damage amount L2, which is the amount of damage to the important facilities 420, using the price of the flooded facilities 421 and the second coefficient 630. In this embodiment, the second damage amount calculation unit 205 calculates the second damage amount L2 using equation (5). An example of the result of the second damage amount L2 calculated by the second damage amount calculation unit 205 is shown in FIG. 16.

[0091] This method makes it possible to determine whether or not each important facility 420 will be flooded, and then calculate the amount of damage to flooded facility 421, which is flooded important facility 420, as the amount of damage to important facility 420. This makes it possible to calculate the amount of damage to important facility 420 in the event of a flood in more detail and in line with the actual situation.

[0092] The second damage amount calculation unit 205 may identify the above-mentioned flooded facilities 421 based on the height of the flood surface (maximum flood level), the height of the flood prevention line, and the above-mentioned first information, second information, and third information.

[0093] In this manner, it becomes possible to determine whether or not each important facility 420 will be flooded, taking into account the flood prevention line.

[0094] As described above, the second damage amount calculation unit 205 calculates the second damage amount L2 using equation (5). However, as shown in equation (4), the value of the second coefficient 630 may be determined for each important facility 420, and the sum of the products of the prices of each flooded facility 421 and the second coefficient 630 corresponding to that flooded facility 421 may be calculated as the second damage amount L2.

[0095] This method makes it possible to take into account the different susceptibility of important equipment 420 to flood damage depending on the type of important equipment 420, making it possible to calculate the amount of damage to important equipment 420 in the event of a flood in a more detailed manner that is in line with actual conditions.

[0096] Similarly, the value of the second coefficient 630 may be determined for each type of building 400, and the second damage amount calculation unit 205 may calculate the sum of the products of the prices of each flood-resistant facility 421 and the second coefficient 630 corresponding to the type of building 400 as the second damage amount L2.

[0097] According to this embodiment, it is possible to take into account the susceptibility of important equipment 420 to flood damage, which varies depending on the type of building 400, making it possible to calculate the amount of damage to important equipment 420 in the event of a flood in a more detailed manner that is in line with actual conditions.

[0098] The third damage amount calculation unit 206 calculates the third damage amount L3, which is the amount of damage to the non-critical equipment 430, using the price of the non-critical equipment 430 and the third coefficient 640. In this embodiment, the third damage amount calculation unit 206 calculates the third damage amount L3 using equation (7) or equation (8).

[0099] The building damage amount calculation unit 207 then calculates the damage amount L of the building 400 at the time of the flood disaster based on the calculation results of the first damage amount L1, the second damage amount L2, and the third damage amount L3.

[0100] Specifically, the building damage amount calculation unit 207 calculates the damage amount L of the building 400 using a calculation formula such as that shown in FIG. 17 and formula (9).

[0101] L = L1 + L2 + L3 … (9) This embodiment makes it possible to calculate the amount of damage to the building 400 in the event of a flood in a more detailed manner that is in line with the actual situation. ==Processing flow== Next, the flow of processing by the damage amount calculation device 200 according to this embodiment will be described with reference to the flowchart shown in FIG.

[0102] First, the damage amount calculation device 200 acquires information about the address (construction location) of the building 400 (S1000). Specifically, the damage amount calculation device 200 acquires basic information 600 in which the address of the building 400 is described.

[0103] The damage amount calculation device 200 then obtains predicted results of flood damage expected in the area (such as the expected depth of flooding in the event of a flood) based on information about this address (construction site), such as a hazard map, and outputs a flood risk report 300 that lists the expected depth of flooding in the event of external and internal flooding (S1010).

[0104] The damage amount calculation device 200 then acquires building information 610, which includes the construction location of the building 400, the price of the main body 410 of the building 400, the price of the equipment 450 attached to the main body 410, and the location information of each of the important equipment 420 (S1020).

[0105] The damage amount calculation device 200 also acquires the flood level at the construction site of the building 400 (S1030). The flood level is a value calculated by adding the elevation of the construction site of the building 400 to the flood depth (flood depth in the event of external flooding and in the event of internal flooding) listed in the flood risk report 300, and in this embodiment, is included in the building information 610.

[0106] Then, the damage amount calculation device 200 calculates the first damage amount L1, which is the amount of damage to the main body 410, using the price of the main body 410 and the first coefficient 620 separately stored in the storage device 240 (S1040).

[0107] In addition, based on the location information of each important facility 420 and the flood level, the damage amount calculation device 200 identifies the important facility 420 that is expected to be flooded in the event of a flood as flooded facility 421, and calculates the second damage amount L2, which is the damage amount to the important facility 420, using the price of the flooded facility 421 and the second coefficient 630 stored in the memory device 240 (S1050).

[0108] Furthermore, the damage amount calculation device 200 calculates the third damage amount L3, which is the damage amount of the non-critical equipment 430, using the price of the non-critical equipment 430 and the third coefficient 640 stored in the storage device 240 (S1060).

[0109] The damage amount calculation device 200 then calculates the damage amount L of the building 400 at the time of the flood disaster based on the calculation results of the first damage amount L1, the second damage amount L2, and the third damage amount L3 (S1070).

[0110] This embodiment makes it possible to calculate the amount of damage to the building 400 in the event of a flood in a more detailed manner that is in line with the actual situation.

[0111] The damage amount calculation device 200, the control method and program for the damage amount calculation device 200 according to this embodiment have been described above. According to this embodiment, it is possible to calculate the damage amount L of the building 400 in the event of a flood in a more detailed manner in line with the actual situation. This makes it possible, for example, to incorporate the risk of flood damage caused by climate change into a management strategy in more detail. Alternatively, it is also possible to estimate the property insurance premium for the building 400 in more detail. Furthermore, the owner or manager of the building 400 can present numerical data that objectively indicates the resilience of the building 400 against flood damage to prospective buyers of an apartment building or prospective tenants of an office building.

[0112] The above-described embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and equivalents thereof are also included in the present invention.

[0113] For example, in the above embodiment, an example was shown in which the flood damage amount L was calculated for the already constructed building 400, but the target may also be a building 400 before construction (for example, at the design stage). In this case, it is possible to change the design of the building 400 so that the damage amount L is reduced.

[0114] Alternatively, the water level can be measured after a flood actually occurs, and the results can be used to calculate the damage amount L in an extremely short time.

[0115] In the above embodiment, the second coefficient Rij is set to a value for each type of important facility 420 and each type of building 400, but to simplify the calculation of the second damage amount L2, it may be unified to a single value regardless of the type of important facility 420 and the type of building 400. Alternatively, a value may be set for each important facility 420 but not depending on the type of building 400. Conversely, a value may be set for each type of building 400 but not depending on the type of important facility 420. [Explanation of symbols]

[0116] 200 Damage calculation device 201 Building Information Acquisition Department 202 Coefficient memory unit 203 Flood height acquisition unit 204 First Damage Calculation Department 205 Second Damage Calculation Department 206 Third Damage Calculation Department 207 Building Damage Calculation Department 210 CPU 220 memory 230 Communication Equipment 240 Storage device 250 Input Devices 260 Output Device 270 Recording medium reader 300 Flood Risk Report 400 buildings 410 Main Unit 420 Important equipment 421 Flooding equipment 430 Non-critical equipment 440 Flood prevention installations 450 Equipment 500 Network 600 Basic information 610 Building Information 620 First Coefficient 621 First Coefficient Definition Table A 622 First coefficient definition table B 630 Second Coefficient 631 Second Coefficient Definition Table 640 Third Coefficient 641 Third Coefficient Definition Table A 642 Third Coefficient Definition Table B 650 Flood Management Information 700 Damage calculation device control program 800 Recording Media

Claims

1. A damage calculation device for calculating the amount of damage to a building when a flood occurs, a building information acquisition unit that acquires building information including the construction location of the building, the price of the building itself, the price of equipment incidental to the building itself, and location information of important equipment that is determined as important equipment for the functioning of the building among the equipment; a coefficient storage unit that stores a first coefficient for calculating the amount of damage to the main body when a flood occurs, a second coefficient for calculating the amount of damage to the important equipment when a flood occurs, and a third coefficient for calculating the amount of damage to non-important equipment that is equipment other than the important equipment when a flood occurs; a flood height acquisition unit that acquires the height of the flood surface at the construction site when a flood occurs; a first damage calculation unit that calculates a first damage amount, which is the amount of damage to the main body, using the price of the main body and the first coefficient; a second damage amount calculation unit that identifies important facilities that are expected to be flooded in the event of a flood as flooded facilities based on the location information of each of the important facilities and the height of the flood surface, and calculates a second damage amount, which is the amount of damage to the important facilities, using the price of the flooded facilities and the second coefficient; a third damage amount calculation unit that calculates a third damage amount, which is the amount of damage to the non-critical equipment, using the price of the non-critical equipment and the third coefficient; a building damage calculation unit that calculates the amount of damage to the building when a flood occurs based on the calculation results of the first damage amount, the second damage amount, and the third damage amount; A damage calculation device comprising:

2. The damage calculation device according to claim 1, The second coefficient has a value determined for each type of important equipment, The second damage amount calculation unit calculates the second damage amount as the sum of the products of the prices of each of the floodable facilities and a second coefficient corresponding to the type of the floodable facilities.

3. The damage calculation device according to claim 1, the second coefficient has a value determined for each type of building, and the building information includes information indicating the type of building, The second damage amount calculation unit calculates the second damage amount as the sum of the products of the prices of each of the flooded facilities and a second coefficient corresponding to the type of building.

4. The damage calculation device according to claim 1, The building information includes information indicating the height of a flood prevention line set for the building, and the location information of the important equipment includes first information indicating whether the height of the important equipment is higher than the height of the flood surface, second information indicating whether the important equipment is inside the flood prevention line, and third information indicating whether the height of the flood surface is equal to or higher than the height of the flood prevention line, The second damage amount calculation unit is a damage amount calculation device that identifies the flooded equipment based on the height of the flood surface, the height of the flood prevention line, the first information, the second information, and the third information.

5. The damage calculation device according to claim 1, The height of the flood surface is the value obtained by adding the elevation at the construction site to the depth of flooding at the time of flooding, according to the damage calculation device.

6. The damage calculation device according to claim 1, The height of the flood surface is the larger of a first height calculated using the predicted results of flood damage caused by external flooding when precipitation is assumed to have an annual exceedance probability of 1 / 200 in the area including the construction site, and a second height calculated using the predicted results of flood damage caused by internal flooding when precipitation is assumed to have an annual exceedance probability of 1 / 1000 in the area including the construction site, in this damage amount calculation device.

7. A control method for a damage calculation device that calculates the amount of damage to a building when flood damage occurs, The damage calculation device, acquiring building information including the construction location of the building, the price of the building itself, the price of equipment incidental to the building itself, and location information of important equipment among the equipment that is determined as equipment that is important for the functioning of the building; a first coefficient for calculating the amount of damage to the main body when a flood occurs, a second coefficient for calculating the amount of damage to the important equipment when a flood occurs, and a third coefficient for calculating the amount of damage to non-important equipment that is equipment other than the important equipment when a flood occurs; Obtain the height of the flood surface at the construction site when a flood occurs; Calculating a first damage amount, which is the damage amount of the main body, using the price of the main body and the first coefficient; Based on the location information of each of the important facilities and the height of the flood surface, important facilities that are expected to be flooded in the event of a flood are identified as flooded facilities, and a second damage amount, which is the amount of damage to the important facilities, is calculated using the price of the flooded facilities and the second coefficient; Calculating a third damage amount, which is the damage amount of the non-critical equipment, using the price of the non-critical equipment and the third coefficient; A control method for a damage calculation device that calculates the amount of damage to the building in the event of a flood based on the calculation results of the first damage amount, the second damage amount, and the third damage amount.

8. A program for causing a computer to calculate the amount of damage to a building when a flood occurs, The computer, a step of acquiring building information including the construction location of the building, the price of the building itself, the price of equipment attached to the building itself, and location information of important equipment among the equipment that is determined to be important equipment for the functioning of the building; a step of storing a first coefficient for calculating the amount of damage to the main body when a flood occurs, a second coefficient for calculating the amount of damage to the important equipment when a flood occurs, and a third coefficient for calculating the amount of damage to non-important equipment that is equipment other than the important equipment when a flood occurs; A procedure for obtaining the height of the flood surface at the construction site when a flood occurs; a step of calculating a first damage amount, which is the damage amount of the main body, using the price of the main body and the first coefficient; a step of identifying important facilities that are expected to be flooded in the event of a flood as flooded facilities based on the location information of each of the important facilities and the height of the flood surface, and calculating a second damage amount, which is the amount of damage to the important facilities, using the price of the flooded facilities and the second coefficient; a step of calculating a third damage amount, which is the damage amount of the non-critical equipment, using the price of the non-critical equipment and the third coefficient; calculating the amount of damage to the building when a flood occurs based on the calculation results of the first damage amount, the second damage amount, and the third damage amount; A program to execute.

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