INUNDATION SIMULATOR AND PROGRAM

• US 20070225955A1
• Filed: 03/22/2007
• Published: 09/27/2007
• Est. Priority Date: 03/24/2006
• Status: Active Grant

• Current Assignee: Hitachi Engineering & Services Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Engineering & Services Company Limited (Hitachi, Ltd.)
• Inventors: Yamaguchi, Satoshi, Iwamura, Kazuaki, Ikeda, Tsutomu
• Granted Patent: US 7,957,945 B2
• Time in Patent Office: Days
• US Class Current: 703/9
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30
• CPC Class Codes: Y02A 10/40 Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping

Abstract

The present invention displays a map, let a user to input a starting point and an ending point in a bank breakage section on the map, and shows a broken place on the map with a line connecting the starting point and the ending point. Further, the present invention calculates the direction of the flow quantity in bank breakage by calculating the normal line to the side of the inside area of the bank at the input broken place and make the it discrete in the calculation grids of the inundation simulation.

Claims

1. An inundation simulation program for

displaying a map on a display part;

receiving specification of an inflow section from a user on the map;

deciding a line indicating the inflow section from the input specification;

calculating a direction of an flow quantity vector from a direction of the line and displays the direction with the inflow section on the map; and

performing inundation simulation using the flow quantity vector.

2. The inundation simulation program according to claim 1, wherein

the specification of the inflow section is an input of control points of two or more;

and

the line is decided by interpolating the control points with a line or a curve.

3. The inundation simulation program according to claim 2, wherein

the direction of the flow quantity vector is parallel with a normal line of the line toward a predetermined direction of either left or right seeing in the direction from the input control point to a next input control point.

4. The inundation simulation program according to claim 1, wherein

the map manages a river shape with place information on the map;

the specification of the control points is input by a line or shape; and

the program decides the line by calculating points of intersection of the line or a shape and the river shape, and connecting the points of intersection.

5. The inundation simulation program according to claim 1, wherein

the program receives an input of the flow quantity in time line at the inflow section.

6. The inundation simulation program according to claim 1, wherein

the program receives water depth at the inflow section as a length of the line, and

calculates the flow quantity at the inflow section from the magnitude of the length.

7. The inundation simulation program according to claim 5, wherein the program performs the inundation simulation by

obtaining the length of the line placed on the grid/grids for each grid/grids, which is a unit for performing the simulation;

calculating the magnitude of the flow quantity vector for each of the grids from the input flow quantity based on the length; and

performing the simulation using the flow quantity vector for each of the grids.

8. The inundation simulation program according to claim 5, wherein the program performs the inundation simulation by

obtaining the direction of the normal line for a part of the line placed on the grid/grids for each of the grids, which is a unit for performing the simulation;

and

performing the simulation using the direction of the normal line for each of the grids.

9. The inundation simulation program according to claim 1, wherein

the map is used to manage a bank shape as a local place,

receives an input of the both ends of an inflow section as a specification of the inflow section from the user, and decides the bank shape in the inflow section as a line indicating the inflow section.

10. An inundation simulation device comprising:

a display device for displaying a map;

an input device receiving a specification of the inflow section from a user on the map; and

a processing part for deciding a line indicating the inflow section from the input specification and calculating a direction of the flow quantity vector from the direction of the line;

wherein the display device displays the direction of the flow quantity vector with the inflow section on the map; and

the processing part performs the inundation simulation using the flow quantity vector.

11. The inundation simulation device according to claim 10, wherein

the processing part makes the direction of the normal line of the line toward either left or right to the predetermined line seen in the direction from the input control point to the next input control point the direction of the flow quantity vector.