Identify a flood theme that has been applied to a network model and describe the benefits of utilizing a flood theme.
Transcript
00:04
In InfoWorks ICM, the flood theme provides a comprehensive picture of all water levels across 1D and 2D object results.
00:12
Within the flood theme, the flood extents are implemented as follows.
00:17
In river reaches, the water surface is triangulated between the known water levels at river sections
00:23
and along bank lines;
00:31
storage polygons, single horizontal surface for the whole polygon.
00:35
The depth contours are obtained by subtracting the ground model ground level from the water surface.
00:41
To produce the flood contours a set of results must be opened with the ground model loaded into the GeoPlan.
00:48
Where rainfall is applied directly to the mesh, it is usually good practice to adjust the Minimum calculated depth
00:55
where theme applies field to remove the noise that is created by shallow sheet flow.
01:00
When comparing the examples of the 2D elements theme to the flood theme,
01:04
there are several noticeable differences.
01:07
First, the granularity of the flood results matches the ground model grid,
01:11
rather than the mesh element sizes which are typically much larger.
01:15
Some of the detail that was partially accounted for or lost in the meshing,
01:19
such as the drainage channels, has been built back into the results representation.
01:24
Second, the flood theme is displayed within the river reach and bridge polygons,
01:28
which provides a more complete picture of the water level results.
01:32
While you are most likely to use 2D elements themes when you inspect your results,
01:36
the flood theme can provide a comprehensive picture and build detail back into the results
01:40
that are simplified for the purpose of simulation.
01:44
Depending on the resources invested, you can also present a 3D view of your results with the flood theme active.
01:50
For example, in this view, the flood theme displays in conjunction with buildings raised out of the mesh
01:56
and aerial photography or mapping.
01:59
This can make it easier to conceptualize certain elements.
02:03
This is especially useful if presenting your results to stakeholders or to the public.
00:04
In InfoWorks ICM, the flood theme provides a comprehensive picture of all water levels across 1D and 2D object results.
00:12
Within the flood theme, the flood extents are implemented as follows.
00:17
In river reaches, the water surface is triangulated between the known water levels at river sections
00:23
and along bank lines;
00:31
storage polygons, single horizontal surface for the whole polygon.
00:35
The depth contours are obtained by subtracting the ground model ground level from the water surface.
00:41
To produce the flood contours a set of results must be opened with the ground model loaded into the GeoPlan.
00:48
Where rainfall is applied directly to the mesh, it is usually good practice to adjust the Minimum calculated depth
00:55
where theme applies field to remove the noise that is created by shallow sheet flow.
01:00
When comparing the examples of the 2D elements theme to the flood theme,
01:04
there are several noticeable differences.
01:07
First, the granularity of the flood results matches the ground model grid,
01:11
rather than the mesh element sizes which are typically much larger.
01:15
Some of the detail that was partially accounted for or lost in the meshing,
01:19
such as the drainage channels, has been built back into the results representation.
01:24
Second, the flood theme is displayed within the river reach and bridge polygons,
01:28
which provides a more complete picture of the water level results.
01:32
While you are most likely to use 2D elements themes when you inspect your results,
01:36
the flood theme can provide a comprehensive picture and build detail back into the results
01:40
that are simplified for the purpose of simulation.
01:44
Depending on the resources invested, you can also present a 3D view of your results with the flood theme active.
01:50
For example, in this view, the flood theme displays in conjunction with buildings raised out of the mesh
01:56
and aerial photography or mapping.
01:59
This can make it easier to conceptualize certain elements.
02:03
This is especially useful if presenting your results to stakeholders or to the public.
In InfoWorks ICM, the flood theme provides a comprehensive picture of all water levels across 1D and 2D object results.
Within the flood theme, flood extents are implemented as follows.
Depth contours obtained by subtracting ground model ground level from water surface.
To produce flood contours, open set of results with ground model loaded into GeoPlan.
Where rainfall is applied directly to mesh, adjusting Minimum calculated depth where theme applies removes noise created by shallow sheet flow.
Noticeable differences when comparing examples of 2D elements theme and flood theme:
Common to use 2D elements themes when inspecting results, but flood theme can provide comprehensive picture and build detail back into results simplified for simulation.
Depending on resources, can also present 3D view of results with flood theme active.
Can make it easier to conceptualize certain elements.
Useful when presenting results to stakeholders or public.
