Menu Bar/ Flood Simulation

Figure: Flood simulation menu

Table: Flood simulator menu items and features

item		function
Start Simulation		Configure and run the simulation settings.
End of Simulation		Terminate a running simulation.
Viewing calculation results		Displays the calculation results in real time.
Flow velocity display		Show/hide flow velocity.
Maximum immersion depth	indication	Displays the maximum immersion depth.
	Text output	Outputs the maximum immersion depth to text.
	Output in KML	KML output of the maximum immersion depth.
	Multi-case results and analysis	The maximum immersion depth of multiple simulation results is superimposed.
Water level and topographic cross-sectional display		Displays the topographic section and water level for a specified range.
Risk display		Displays the degree of danger according to the water depth and flow velocity.
Maximum risk indication		Displays the maximum risk level.
House collapse zone display		Displays the collapse zone of the house.
export	Maximum immersion depth output in KML	KML output of the maximum immersion depth.
	Output calculation results as a video	Prints videos.
	Export Maximum Envelope	The maximum envelope inundation depth is output from multiple calculation results in CSV and netCDF formats.
Display details	Add ground height to water depth (water level is displayed)	The water level is displayed by adding the ground height value to the water depth of the simulation result.
	Waterfall line display	Displays a waterfall waterline.
	View the outline of the river basin	Displays the outline of the river basin.
	View river basin details	View river basin details.
	Simulation shape display	Displays the meshed boundary conditions on a map.
	Rainfall display	Displays rainfall data captured by the rainfall scenario function. The display is displayed when the Watershed Analysis item in the rainfall data properties is enabled.
Simulation calculation time		Displays the calculation time for the simulation.
Clear display		Clears the simulation results displayed on the map.

Start Simulation

1. When you select a menu, [Start Simulation] a dialog appears. Configure the simulation settings.

   
   Figure: Start Simulation dialog

   • Simulation conditions

   item	explanation
   Simulation date and time	Set the start date and time for the simulation.
   Calculation time	Set the simulation calculation time. You can enter up to 4,000 hours and 59 minutes. If you set 0 hours and 0 minutes, the calculation will be performed indefinitely.
   Calculated Mesh Size	Sets the mesh size to be calculated. [0.5m/1m/2m/5m/10m/25m/50m/100m/250m/500m/1km/5km]
   Watershed analysis accuracy	Sets the mesh size for watershed analysis. [1m/2m/5m/10m/25m/50m/100m/250m/500m/1km/5km]

   • option

   item		explanation
   Provide infiltration capacity according to land use		Check if you want to enable seepage loss for each land use.
   	Give initial losses based on land use	Check if you want to enable initial loss for each land use.
   Use a three-tier model		Check when using a three-layer model.
   Initialize rivers with unequal flow		Check when the river is initialized with unequal flow. Reference: Technical Reference/ River Model/ Initialized with Unequal Flow
   	Perform initialization only	Check if you want to perform initialization only.

   • Simulation Results

   item	explanation
   Save interval	Set the interval (in seconds) at which the simulation result log is saved. Valid values are 1~600 seconds.
   Log File Name	Set the desired log file name.

2. [beginning] button.

   The simulation starts.

End of Simulation

Select the menu to kill a running simulation.

A simulation result log up to the time of execution is created.

Viewing calculation results

Select the menu to view the calculation results.

Select the menu again to hide the calculation results.

Figure: Displaying calculation results

Flow velocity display

Select the menu to display the velocity vector.

Select the menu again to hide the velocity vector.

Figure: Displaying velocity vectors

Maximum immersion depth

1. indication

   Select the menu to display the maximum immersion depth on the map.

   Select the menu again to hide the maximum immersion depth.

   Figure: Displaying the maximum immersion depth

2. Text output

   With the maximum immersion depth displayed, select the menu and specify the save destination.

3. Output in KML

   With the maximum immersion depth displayed, select the menu and specify the save destination.

4. Multi-case results and analysis

   [establishment] When you select a menu, [Multiple cases maximum immersion depth] a dialog appears.

   Select the simulation results log for which you want to view the maximum immersion depth [OK] and click the button.

   Figure: Multi-case maximum immersion depth dialog/Maximum immersion depth display for each data

   To clear the maximum flood depth display [clear] , select the menu.

Risk display

Select the menu to display the level of danger (difficulty in walking).

Walking difficulty is calculated from the depth and velocity of the water.

Maximum risk indication

Select the menu to display the maximum risk level during the simulation period.

House collapse zone display

Select "True" for the "Calculate house collapse risk zone (flood)" item in the project properties.

Figure: Properties for calculating building collapse risk

Select the menu to display a mesh that has exceeded the flow velocity that is at risk of either sliding or collapsing buildings.

• Displaying a Mesh After Selecting a Menu

  

export

1. Maximum immersion depth output in KML

   1. Select the menu and choose where you want to save it.

2. Output calculation results as a video

   1. The location to output the video is displayed on the map.

      The displayed map screen becomes the camera angle of the video as it is.

      Display the map display, location, and depression angle.

   2. [Output calculation results as a video] Select the menu, set the output conditions, and [OK] click the button.

      A video file is created in the specified output destination.

      Figure: Output the calculation result as a video

   Table: Video output menu items and descriptions

   item		explanation
   Output settings	Output Folder	Displays the output folder name.
   	Output File Name	Set the destination and file name.
   	Video Formats	You can choose between WMV and MPEG-4.
   	Video length	Set the length of the video to be output.
   	Video size	Select the size of the video.
   	Video bitrate	Select the bitrate.
   Input settings	Frames per second	Sets the number of frames per second.
   	Base date and time	Specifies the date and time on which to display elapsed time.
   	Source length	Set the simulation time.

3. Export Maximum Envelope

   1. Add simulation results.

      Select the Export Maximum Envelopes [addition] dialog button.

      [open] Select the simulation result file (*.fsxidx) in the dialog box and [open] click the button.

      [Ctrl]You can select multiple files while holding down the key, and [Shift] specify the range of files while holding down the key.

      Figure: Adding simulation results

   2. In the Export Maximum Envelopes dialog, set the output conditions [export] and click the button.

      Export maximum envelope data and home collapse risk area data.

      The output range is 50 km from east to west and 50 km from north to south.

      If the output range is exceeded, an error occurs.

   Table: Output settings and contents of the Export Maximum Packets dialog

   Output setting items	substance
   File format	Select the output file format "CSV format" / "netCDF format".
   Destination Folder	Select the folder where METADATA.csv* resides.
   Mesh Size	Select a mesh size. By default, the calculated mesh size is selected. * No matter which mesh size you specify, 5m ground height information will be used.
   comment	Valid only when NetCDF format is selected. Sets the string to be included in the comment attribute in NetCDF. Blanks are usually fine.
   Compression level	Valid only when NetCDF format is selected. Set the NetCDF compression ratio to 0 (no compression), 1 (low compression) ~ 9 (high compression).
   terrain project file	You can specify the 5m terrain data to be used when calculating the results. However, only the 5m terrain data of the calculation area created in the latitude-longitude system is applied. Also, if the calculation is made with a 5m mesh, the terrain in the calculation log will be applied, so it will not be applied even if you specify it.

   * Ministry of Land, Infrastructure, Transport and Tourism Guidelines for Digitization of Flood Expected Area Map (3rd Edition) Reiwa September of the first year (Flood Edition) Table 4 Contents of metadata file, URL

Display details

1. Add ground height to water depth (water level is displayed)

   When you select the menu, the water depth plus the ground height (water level) is displayed.

   The coloring (legend) used to display the water level is based on the "water level" in the legend dialog.

   

2. Waterfall line display

   Select the menu to view the main waterfall lines flowing from the watershed into the river.

   

3. View the outline of the river basin

   Select the menu to view the outline of the river basin.

   

4. View river basin details

   Select the menu to view details of the river basin.

   

5. Simulation shape display

   Select the menu to view the meshed boundary conditions.

   

6. Rainfall display

   Select a menu to color the mesh according to rainfall.

   

Clear display

Select the menu to clear the displayed simulation results.

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Last update: 2023-03-20