JP2014006605A - Warning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a warning system that allows for an inexpensive and simplified system construction regarding inundation damage.SOLUTION: The warning system is configured to comprise: rainfall information acquisition means (step S103) that acquires rainfall information relating to a specified district via a communication line; extraction means (step S104) that extracts time-series rainfall image data of a rainfall region having a rainfall amount more than a threshold rainfall amount on the basis of the rainfall information acquired by the rainfall information acquisition means; movement velocity vector calculation means (step S106) that calculates a movement velocity vector of a center of gravity of the rainfall district on the basis of the time-series rainfall image data extracted by the extraction means; continuing rainfall time calculation means (step S109) that calculates a continuing rainfall time; determination means (step S110) that determines whether or not the continuing rainfall time calculated by the continuing rainfall time calculation means is more than a predetermined limit time; and notification means (step S112) that notifies a warning when the calculated continuing rainfall time is determined to be more than the limit time.

Description

  The present invention relates to a warning system for predicting and reporting damage such as submergence caused by rainfall.

  In recent years, damage caused by local heavy rains has frequently occurred in urban areas. Such damage can be said to be a kind of “inland water inundation” due to temporary excess of rainwater drainage capacity. In general, as a method of predicting “inland water inundation” in urban areas, it is assumed that local heavy rains that change from moment to moment are assumed to be uniform rainfall intensity, and details such as ground elevation, topography, land use status of the ground surface, etc. A complex and advanced analysis method is adopted that combines surface flow analysis by simple modeling and runoff analysis that reproduces a sewer network stretched vertically and horizontally underground. Modeling in the above analysis method is difficult to improve modeling accuracy, such as updating or changing the sewer network, the operation status of the drainage station that discharges the sewer to the river, and the inflow and outflow between the ground surface and the sewer. There are many items. Further, in the above analysis method, the rainfall external force “local heavy rain”, which is an important factor in the analysis, does not fall uniformly in terms of area and strength, and may result in an analysis result that is far from reality. Furthermore, even if the inundation amount in the analysis area can be predicted and calculated, it is not possible to predict where the damage will occur specifically. In particular, even if a specific rainfall external force can be identified even if the time (lag) from the occurrence / recognition of “local heavy rain” to the occurrence of damage is as short as several tens of minutes to several hours, detailed analysis and analysis from that point Is impossible.

  On the other hand, the interest of individual residents and individual building managers lies in the very immediate and familiar danger of "sudden rain showers suddenly fallen around their homes." Currently, there are private weather forecasts on TV radio and the Internet, as well as general rainfall information provided by public institutions (for example, Tokyo Amesh (provided by the Tokyo Metropolitan Sewerage Bureau) and MP Radar (provided by the Ministry of Land, Infrastructure, Transport and Tourism)). It is in an environment where the outbreak information can be obtained. However, the information on the occurrence of local heavy rain is not associated with the possibility of occurrence of damage at individual locations due to heavy rain.

  Therefore, conventionally, a technique for predicting damage such as the possibility of flooding in a predetermined area due to rain has been proposed. For example, Patent Document 1 (Japanese Patent Laid-Open No. 2002-298063) is a system mainly for sewer managers and disaster prevention officers of local governments, and includes real-time measurement data (rain gauge, water level gauge), huge model The technology for associating with specific damages is disclosed by the conversion (terrain elevation, sewer network) and detailed analysis work (rainfall analysis, flood analysis).

Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-192206) predicts future inundation based on real-time information in a system for disaster prevention personnel in local governments (runoff analysis, inundation analysis, sewer network flow analysis). ), And those that can issue warnings to the entire area as needed are disclosed.
JP 2002-298063 A JP 2004-192206 A

  In the conventional technique described in Patent Document 1, there is a problem that a facility such as a rain gauge and a water level gauge must be installed in the target area, which requires a large cost and labor. Moreover, in the system described in Patent Document 2, it is necessary to execute analysis processing that requires a large processing load on the computer, such as runoff analysis, inundation analysis, and sewer network flow rate analysis, and a computer with high processing capacity must be prepared. There was a problem that the cost for system construction was high.

  This invention solves the said subject, The invention which concerns on Claim 1 is a warning system which alert | reports the warning regarding the inundation damage in a target point, Comprising: The rain information regarding a predetermined area is acquired via a communication line A rainfall information acquisition means, an extraction means for extracting time-series rainfall image data of a rainfall area having a rainfall amount greater than or equal to a threshold rainfall amount based on the rainfall information acquired by the rainfall information acquisition means, and the extraction means A moving speed vector calculating means for calculating the moving speed vector of the gravity center of the rain region based on the time-series rain image data extracted by the method, and a length at which a line segment parallel to the moving speed vector extended from the target point intersects the rain region. A continuous rainfall time calculating means for calculating a continuous rain time from the moving speed vector, and a continuous rain time calculated by the continuous rain time calculating means. It is characterized by comprising determination means for determining whether or not it is over the limit time, and informing means for informing an alarm when the determination means determines that the continuous rainfall time is over the predetermined limit time. .

  Further, the invention according to claim 2 is a warning system for notifying a warning about inundation damage at a target point, the rainfall information acquiring means for acquiring rainfall information about a predetermined area via a communication line, and the rain information acquiring means Extracting means for extracting time-series rainfall image data in a rainfall area having a rainfall amount greater than or equal to a threshold rainfall amount based on the rainfall information acquired by the method, and features in the time-series rainfall image data extracted by the extracting means An input requesting means for prompting the user to input a point, a moving speed vector calculating means for calculating the moving speed vector of the feature point acquired by the input requesting means, and a line parallel to the moving speed vector extended from the target point A continuous rain time calculating means for calculating a continuous rain time from the length of the minute intersecting the rain area and the moving speed vector, and the continuous rain time calculating Determining means for determining whether or not the continuous rainfall time calculated in the stage is equal to or greater than a predetermined limit time, and alerts when the determination means determines that the continuous rainfall time is equal to or greater than the predetermined limit time And an informing means.

  The invention according to claim 3 is the alert system according to claim 1 or 2, further comprising a database for storing the threshold rainfall and the limit time corresponding to the target point.

  According to the alert system according to the present invention, equipment such as a rain gauge and a water level gauge and a computer with high processing capacity are unnecessary, and it is possible to construct a system easily and inexpensively.

It is a figure which shows an example of the system configuration used in order to perform the alerting system 1 which concerns on embodiment of this invention. It is a figure explaining the relationship between the alert system 1 which concerns on embodiment of this invention, and various information provision servers. It is a figure which shows typically the data structure of the judgment criteria database 22 classified by point used with the alerting system 1 which concerns on embodiment of this invention. It is a figure which shows the flowchart of a process of the alert system 1 which concerns on 1st Embodiment of this invention. It is a conceptual diagram of the process based on the rainfall image data in the alerting system 1 which concerns on 1st Embodiment of this invention. It is a conceptual diagram of the process based on the rainfall image data in the alerting system 1 which concerns on 1st Embodiment of this invention. It is a conceptual diagram of the process based on the rainfall image data in the alerting system 1 which concerns on 1st Embodiment of this invention. It is a figure which shows the flowchart (the 1) of a process of the alert system 1 which concerns on 2nd Embodiment of this invention. It is a figure which shows the flowchart (the 2) of a process of the alert system 1 which concerns on 2nd Embodiment of this invention. It is a conceptual diagram of the process based on the rainfall image data in the alert system 1 which concerns on 2nd Embodiment of this invention. It is a conceptual diagram of the process based on the rainfall image data in the alert system 1 which concerns on 2nd Embodiment of this invention. It is a conceptual diagram of the process based on the rainfall image data in the alert system 1 which concerns on 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an example of a system configuration used for executing a warning system 1 according to an embodiment of the present invention.

  In FIG. 1, 10 is a system bus, 11 is a CPU (Central Processing Unit), 12 is a RAM (Random Access Memory), 13 is a ROM (Read Only Memory), 14 is a communication control unit that controls communication with an external information device, 15 is an input control unit such as a keyboard controller, 16 is an output control unit such as a display controller, 17 is an external storage device control unit, 18 is an input unit including input devices such as a keyboard, pointing device, and mouse, 19 is an LCD display, etc. An output unit 20 including a display device and a printing device 20 is an external storage device such as an HDD (Hard Disk Drive).

  In FIG. 1, the CPU 11 retrieves and acquires data by communicating with an external device in accordance with a program ROM stored in the ROM 13 or a program stored in the large-capacity external storage device 20. Processing of output data in which graphics, images, characters, tables, etc. are mixed is executed, and management of a database stored in the external storage device 20 is further executed.

  Further, the CPU 11 comprehensively controls each device connected to the system bus 10. The program ROM in the ROM 13 or the external storage device 20 stores an operating system program (hereinafter referred to as OS) that is a basic program for controlling the CPU 11. The ROM 13 or the external storage device 20 stores various data used when performing output data processing or the like. The RAM 12 functions as a main memory and work area for the CPU 11.

  The input control unit 15 controls the input unit 18 from a keyboard or a pointing device (not shown). The output control unit 16 controls the output of the output unit 19 of a display device such as an LCD display or a printing device such as a printer.

  The external storage device control unit 17 is an external storage device 20 such as an HDD (Hard Disk Drive) or a floppy disk (FD) that stores a boot program, various applications, font data, user files, editing files, printer drivers, and the like. Control access to.

  In the alert system 1 according to the present embodiment, in particular, the point-by-point determination criterion database 22 is stored in the external storage device 20, and the CPU 11 is configured to refer to it appropriately.

  In the alert system 1 according to the present invention, whether or not flood damage occurs due to heavy rain at a specific point is determined as “continue falling for a certain threshold time (rainfall duration limit time) or more”. Judgment by whether or not. For example, at a predetermined point in Koto-ku, Koto-ku, if a rain of 72.0 mm / h continues for more than 15 minutes, the road will be inundated and the sewer will flow backward and be damaged by flooding.

FIG. 3 is a diagram schematically showing the data structure of the point-by-point determination criterion database 22 used in the alert system 1 according to the embodiment of the present invention. In warning system 1 according to the present invention, in order to make a determination as described above, in the locational criteria database 22, and a threshold rainfall F _N and rainfall continuation limit time T _N at each point P _N is stored, It is used by the CPU 11. The threshold rainfall amount F _N and the rainfall continuation limit time T _N at each point P _N can be determined by the ground elevation, depression ratio, land use form, drainage capacity, etc. at the point.

  Further, the communication control unit 14 controls communication with an external device via a network, thereby acquiring data required by the system from a database held by an external device on the Internet or an intranet, It is configured to be able to send information to an external device.

  In addition to an operating system program (hereinafter referred to as OS) that is a control program for the CPU 11, the external storage device 20 is installed and stored with a system program for operating the alert system 1 of the present invention on the CPU 11 and data used in the system program.・ It is remembered.

  The data used in the system program that implements the alert system 1 of the present invention may basically be stored in the external storage device 20, and these data may be stored on the Internet or via the communication control unit 14. You may make it acquire from the external apparatus on an intranet.

  Next, the alert system 1 as described above is connected to a communication line 50 such as the Internet connected via the communication control unit 14 and acquires various data from various information providing servers connected to the communication line 50. It is supposed to be. FIG. 2 is a diagram for explaining the relationship between the alert system 1 and various information providing servers according to the embodiment of the present invention.

  The rainfall information providing server 60 is a server that provides rainfall information such as Tokyo Amesh (provided by the Tokyo Sewerage Bureau, update interval 5 minutes) and MP radar (provided by the Ministry of Land, Infrastructure, Transport and Tourism, update interval 1 minute). The alert system 1 obtains rainfall information from such a server, and creates data obtained by imaging the current time series rainfall pattern by image processing. Note that when the rain information providing server 60 distributes the rain image data obtained by imaging the current time-series rain pattern, it is not necessary to perform image processing on the warning system 1 side.

  Next, the process example which concerns on 1st Embodiment in the alerting system 1 comprised as mentioned above is demonstrated. FIG. 4 is a view showing a flowchart of processing of the alert system 1 according to the first embodiment of the present invention. Note that the flowchart described below is merely an example of processing.

In FIG. 4, when the process is started in step S100, the user is prompted to input a target point to be alerted by a user interface screen (not shown) or the like. In response to this, in step S101, the user inputs a target point (P _X ). In this example, P _X is the user on the map shown in FIG. 5 will be described with reference to a case that is input as a target point for performing vigilance.

In step S102, the threshold rainfall amount F _X and the rainfall duration limit time T _X corresponding to the target point (P _X ) input by the user are acquired from the point-by-point determination reference database 22. Based on this, in the present invention, whether or not flood damage occurs due to heavy rain at the target point (P _X ) is determined depending on whether or not rainfall exceeding the threshold rainfall amount F _X continues to fall for more than the rainfall duration limit time T _X. judge.

In step S <b> 103, time-series rainfall image data is acquired from the rainfall information providing server 60. In FIG. 5, in step S103, the rain image data before t _d minutes, the rain image data before 2 t _d minutes, the rain image data before 3 t _d minutes were acquired as time-series data and superimposed on the map. The case is illustrated. Note that, in the alert system 1 according to the present invention, t _d is assumed to be approximately 1 to 10 minutes.

In subsequent step S104, time-series rainfall image data of a rainfall region having a rainfall amount F _X or more is extracted from the rainfall image data. FIG. 6 shows a state in which rainfall image data of a time series (t _d minutes ago, 2 t _d minutes ago, 3 t _d minutes ago) of a rainfall area having a rainfall amount F _X or more is extracted.

In step S105, the center of gravity of the rainfall image data equal to or greater than the rainfall amount F _{X at} each time is calculated. In FIG. 6, the centroids C ₁ , C ₂ , and C ₃ are calculated as such centroids corresponding to the respective rain image data before t _d minutes, 2t _d minutes ago, and 3t _d minutes ago. It is shown. A conventionally known technique can be used as a method for calculating the position of the center of gravity from image data.

In step S106, a moving speed vector of the center of gravity of the rainfall area is calculated. In the example shown in FIG. 6, the movement speed vector v (arrow in the figure) is calculated by the movement of the center of gravity C ₃ → the center of gravity C ₂ → the center of gravity C ₁ over time.

In step S107, it is determined whether or not a line extending from the target point (P _X ) and parallel to the moving speed vector intersects with the rain image data. In the example of FIG. 7, the dotted line extending from the target point P _X corresponds to the line as described above. Such lines, at step S107, whether or not intersect the latest rainfall image data (before t _d minutes in Figure 7) is determined.

  When the determination in step S107 is YES, the process proceeds to step S108, and when the determination is NO, the process proceeds to step S115.

  In step S108, the length at which the line intersects the rain image data is calculated. In the example of FIG. 7, this length corresponds to the length aa ′ (= A).

In step S109, the continuous rainfall time T _C is calculated from the moving speed vector v and the length. Here, the continuous rainfall time T _C = A / | v |.

In step S110, the continuous rainfall time T _C and the rainfall continuation limit time T _X are compared, and it is determined whether or not T _C ≧ T _X is satisfied.

If the determination in step S110 is YES, there is a possibility that the target point (P _X ) may be inundated, so the process proceeds to step S112, and the output unit 19 notifies the alarm as “possibility”.

On the other hand, if the determination in step S110 is no, the process proceeds to step S111. In step S111, the continuous rainfall time T _C , the rainfall continuation limit time T _X, and a constant p (however, the constant p satisfies 0 <p <1, and, for example, a value of about 0.5 is selected). And the product pT _X is compared, and it is determined whether or not T _C ≧ pT _X is satisfied.

If the determination in step S111 is YES, it is considered that the target point (P _X ) is unlikely to be submerged, so the process proceeds to step S113, and the output unit 19 notifies the alarm as “low possibility”.

On the other hand, if the determination in step S111 is NO, it is considered that there is no possibility that the target point (P _X ) is inundated, so the process proceeds to step S113, and the output unit 19 notifies the alarm as “no possibility”. To do.

  In step S115, it is determined whether or not there is a system process termination request. If the determination is YES, the process proceeds to step S116, the process is terminated, and if the determination is NO, the process returns to step S103.

  According to the warning system 1 according to the present invention as described above, an alarm can be effectively notified based on information acquired from the rainfall information providing server 60, and facilities such as a rain gauge and a water level gauge as in the past are provided. In addition, a computer with high processing capability is not required, and it is possible to construct a system easily and inexpensively. Moreover, according to the alert system 1 which concerns on this invention, it becomes possible to alert | report an exact alert by a some alert level.

  Next, the process which concerns on 2nd Embodiment in the alert system 1 is demonstrated. FIG.8 and FIG.9 is a figure which shows the flowchart of a process of the alerting system 1 which concerns on 2nd Embodiment of this invention. Note that the flowchart described below is merely an example of processing.

  In the first embodiment, the moving speed vector is automatically obtained from the center of gravity. However, in the second embodiment, this is obtained with the assistance of the user.

In FIG. 8, when the process is started in step S200, the user is prompted to input a target point to be warned by a user interface screen (not shown) or the like. In response to this, in step S201, the user inputs a target point (P _X ). In this example, the P _X user on the map shown in FIG. 10 will be described with reference to a case that is input as a target point for performing vigilance.

In step S202, the threshold rainfall amount F _X and the rainfall duration limit time T _X corresponding to the target point (P _X ) input by the user are acquired from the point-by-point determination reference database 22. Based on this, in the present invention, whether or not flood damage occurs due to heavy rain at the target point (P _X ) is determined depending on whether or not rainfall exceeding the threshold rainfall amount F _X continues to fall for more than the rainfall duration limit time T _X. judge.

In step S203, time-series rainfall image data is acquired from the rainfall information providing server 60. In FIG. 10, in step S203, the rain image data before t _d minutes, the rain image data before 2 t _d minutes, the rain image data before 3 t _d minutes are acquired as time-series data and superimposed on the map. The case is illustrated. Note that, in the alert system 1 according to the present invention, t _d is assumed to be approximately 1 to 10 minutes.

In subsequent step S204, time-series rainfall image data of a rainfall area having a rainfall amount F _X or more is extracted from the rainfall image data. FIG. 11 shows a state in which rainfall image data of a time series (t _d minutes ago, 2 t _d minutes ago, 3 t _d minutes ago) of a rainfall region having a rainfall amount F _X or more is extracted.

In step S205, the extracted time series rainfall image data is displayed on the display device (output unit 19). In FIG. 11, each of the rain image data before t _d minutes, 2 t _d minutes ago, and 3 t _d minutes before is shown as such a center of gravity.

In subsequent S206, a message prompting the user to input a feature point in the time series rainfall image data is displayed. FIG. 11 shows a dialog box in which a message “Please specify a feature point in image data with a cursor.” Used in such a step is displayed. In response to such a message, the user inputs a feature point in the time series rainfall image data using a cursor or the like. Here, an example in which the feature point S ₁ , the feature point S ₂ , and the feature point S ₃ are input by the user is shown. The “feature point” is a point of a specific shape in the rainfall image data, and the specific shape is maintained as time passes. It is assumed that one point is selected from the series of rainfall image data.

  In step S207, it is determined whether or not the input by the user is completed. Such a determination can be made based on whether or not the “complete” button in the dialog box shown in FIG. 11 is clicked.

If the determination in step S207 is YES, the process proceeds to step S208 in FIG. In step S208, the moving speed vector of the feature point is calculated. In the example shown in FIG. 11, the movement speed vector v (arrow in the figure) is calculated by moving the feature point S ₃ → feature point S ₂ → feature point S ₁ over time.

In step S209, it is determined whether or not a line extending from the target point (P _X ) and parallel to the moving speed vector intersects the rain image data. In the example of FIG. 12, dotted lines extending from the target point P _X corresponds to the line as described above. Such lines, at step S209, whether or not intersect the latest rainfall image data (before t _d minutes in FIG. 12) is determined.

  When the determination in step S209 is YES, the process proceeds to step S210, and when the determination is NO, the process proceeds to step S217.

  In step S210, the length at which the line intersects the rain image data is calculated. In the example of FIG. 12, this length corresponds to the length bb ′ (= B).

In step S211, the continuous rainfall time T _C is calculated from the moving speed vector v and the length. Here, the continuous rainfall time T _C = B / | v |.

In step S212, the continuous rainfall time T _C and the rainfall continuation limit time T _X are compared, and it is determined whether or not T _C ≧ T _X is satisfied.

If the determination in step S212 is YES, the target point (P _X ) may be inundated, so the process proceeds to step S214, and the output unit 19 notifies the alarm as “possibility”.

On the other hand, if the determination in step S212 is no, the process proceeds to step S213. In step S213, the continuous rainfall time T _C , the rainfall continuation limit time T _X, and a constant p (however, the constant p satisfies 0 <p <1, and, for example, a value of about 0.5 is selected). And the product pT _X is compared, and it is determined whether or not T _C ≧ pT _X is satisfied.

If the determination in step S213 is YES, it is considered that there is a low possibility that the target point (P _X ) is inundated, so the process proceeds to step S215, and the output unit 19 notifies the alarm as “low possibility”.

On the other hand, if the determination in step S213 is NO, it is considered that there is no possibility that the target point (P _X ) is inundated, so the process proceeds to step S215, and the output unit 19 notifies the alarm as “no possibility”. To do.

  In step S217, it is determined whether or not there is a system process termination request. If the determination is YES, the process proceeds to step S218, the process is terminated, and if the determination is NO, the process returns to step S203.

  According to the warning system 1 according to the second embodiment as described above, an alarm can be effectively notified based on information acquired from the rainfall information providing server 60, and a rain gauge, a water level gauge, etc. No equipment or a computer with high processing capacity is required, and it is possible to construct a system easily and inexpensively. Moreover, according to the alert system 1 which concerns on this invention, it becomes possible to alert | report an exact alert by a some alert level.

Further, matters that can be realized in the alert system 1 according to the present embodiment are summarized below.
(1) Not for the purpose of managing wide-area public infrastructure such as rivers and sewers, but for disaster prevention managers of individual buildings who do not have specialized knowledge, to easily know the possibility of damage (mainly inundation) due to heavy rain in their facilities It is a system for.
(2) Without requiring information collection, analysis, prediction and damage assessment work by specialist engineers, the disaster management manager of each building triggered a sudden collapse of the weather peculiar to guerrilla heavy rain (when the weather was noticed to be bad In addition, a determination result can be obtained in a short time by its own operation.
(3) A large amount of rainfall data, analysis modeling, and high-performance equipment (computer, etc.) necessary for various analyzes are not necessary, and it can be operated only with equipment (computer) and Internet connection environment at the daily work level.
(4) Geometrical analysis of the current rainfall and guerrilla heavy rain-specific short-term rainfall (about 1 minute to 1 hour), past damage and the actual rainfall Judged by statistical comparison. In particular, the guerrilla torrential rain that caused damage to the building in question is a regional pattern in which the rain cloud range shifts from a specific distance away from a specific distance away with a specific amount of rainfall. By creating a database, the possibility of damage can be determined in a short time.

Moreover, the following concepts are also included in the alert system 1 according to the present embodiment.
A.
(1) Means for collecting publicly available rainfall information immediately and automatically, (2) Means for collecting and analyzing the rainfall information by image processing, and (3) Topographic data of the area specified in advance Damage database combining local rainfall patterns and local rainfall patterns at the time of the occurrence of local heavy rains in the area-(4) Damage pattern and current rainfall pattern of the area in the past in this database A warning system comprising: means for comparative analysis / evaluation determination; and (5) means for displaying warning information after determination.
B.
Rainfall information is data published on the Web, and a warning system that automatically collects data at the start of work and time-series data within the past several hours upon request.
C.
Based on the collected rainfall information, a warning area (rainfall passage area) set in advance is extracted, and the rainfall range, rainfall intensity, rainfall accumulation, etc. are automatically calculated using image processing techniques. Vigilance system.
D.
Rainfall damage-The regional information database includes the ground elevation, depression ratio, and land use at the specified point, as well as the range and intensity of local rainfall in the past when some damage occurred, the amount of rainfall An alert system characterized by cumulative features.
E.
The determination of the possibility of occurrence of local heavy rain damage is based on the specific building and the surrounding area based on the rainfall pattern of the warning area (rainfall passage area) and the time series change of the rainfall amount set in advance for the specific building being warned. Warning system characterized by determining whether or not it is similar to that at the time of past damage.
F.
The warning information is a warning system that indicates whether or not some damage will occur due to local heavy rain in specific buildings and surrounding areas in the future.

DESCRIPTION OF SYMBOLS 1 ... Warning system, 10 ... System bus, 11 ... CPU (Central Processing Unit), 12 ... RAM (Random Access Memory), 13 ... ROM (Read Only Memory), 14 ... Communication control unit 15 ... Input control unit 16 ... Output control unit 17 ... External storage device control unit 18 ... Input unit 19 ... Output unit 20 ... External Storage device, 21 ... Rain damage database, 22 ... Judgment criteria database for each point, 50 ... Communication line, 60 ... Rain information providing server

Claims (3)

It is a warning system that notifies a warning about flood damage at a target point,
Rainfall information acquisition means for acquiring rainfall information about a predetermined area via a communication line;
Based on the rainfall information acquired by the rainfall information acquisition means, extraction means for extracting time-series rainfall image data of a rainfall area having a rainfall amount equal to or greater than a threshold rainfall amount;
A moving speed vector calculating means for calculating a moving speed vector of the center of gravity of the rainfall area based on the time-series rainfall image data extracted by the extracting means;
A continuous rain time calculating means for calculating a continuous rain time from a length of a line segment parallel to the travel speed vector extending from the target point and the travel speed vector, and a travel speed vector;
Determining means for determining whether or not the continuous rainfall time calculated by the continuous rainfall time calculating means is equal to or longer than a predetermined limit time;
A warning system comprising: a notification means for notifying an alarm when it is determined by the determination means that the continuous rainfall time is equal to or longer than a predetermined limit time. It is a warning system that notifies a warning about flood damage at a target point,
Rainfall information acquisition means for acquiring rainfall information about a predetermined area via a communication line;
Based on the rainfall information acquired by the rainfall information acquisition means, extraction means for extracting time-series rainfall image data of a rainfall area having a rainfall amount equal to or greater than a threshold rainfall amount;
An input requesting means for prompting the user to input a feature point in the time-series rainfall image data extracted by the extracting means;
A moving speed vector calculating means for calculating a moving speed vector of the feature point acquired by the input request means;
A continuous rain time calculating means for calculating a continuous rain time from a length of a line segment parallel to the travel speed vector extending from the target point and the travel speed vector, and a travel speed vector;
Determining means for determining whether or not the continuous rainfall time calculated by the continuous rainfall time calculating means is equal to or longer than a predetermined limit time;
A warning system comprising: a notification means for notifying an alarm when it is determined by the determination means that the continuous rainfall time is equal to or longer than a predetermined limit time. The warning system according to claim 1, further comprising a database that stores a threshold rainfall amount and a limit time corresponding to the target point.

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