Hazus | Import User-Defined Data for a Tsunami Scenario


[ upbeat music ] [ sound effects ]
boom, whoosh, drip, splash, sparkle [ upbeat music fades in ] Welcome to the “Import User-Defined Data for
a Tsunami Scenario” video tutorial. In this video, you will learn how to import
user-defined data into Hazus to create a tsunami scenario. As a note, for some tsunamis, hazard data
will also include earthquake shaking information. Before we begin importing data into our scenario, we need to retrieve some sample data from the FEMA website. Sample data from the NOAA Pacific Marine Environmental Laboratory, also known as PMEL, are available for all levels of analysis across five communities within the PMEL forecast inundation zones. The five communities include: Crescent City,
CA; Garibaldi, OR; Homer, AK; Kahului, HI; and Westport, WA. These data are available for download via
the link in the video description and more information on the datasets can be found in
the Tsunami User Manual available via the link in the video description. We will be using sample data for Garibaldi
in a study region in Tillamook County, OR. [ upbeat music ] To import the tsunami hazard data, you must
first inform Hazus what type of tsunami scenario it will be modelling. Open the “Hazard” menu and click “Tsunami
Hazard Type…”. A “Near Source only” event represents a combined earthquake and tsunami event and a “Distant Source” event represents just a tsunami; and you can choose whichever suits your model. For our scenario, we will select Distant Source
and click “Ok”. You can now select the user data to run your
scenarioby opening the Tsunami User Data Wizard. Return to the “Hazard” menu and click “User
Data” to launch the wizard. A dialog box will appear with four options
for how much data to import. Two of the choices, “Runup Only – Mean Sea Level” and “Quick Look – Single Maximum Runup,” are Level 1 analyses; “Depth-Above Ground Level and Velocity” is
a level 2 analysis; and “Depth and Momentum Flux” is a Level 3
analysis. Choosing which analysis is best for your study
region depends on the kind of hazard data you have available for a given tsunami event. Note that tsunami is the only hazard in Hazus
that requires user input data for all levels of analysis. We will choose the Level 1 analysis “Runup
Only – Mean Sea Level”. This analysis considers the height of water
onshore from a tsunami above mean sea level for the study region and requires an imported
height grid. After you’ve chosen your level of analysis,
click “Next” to begin defining your scenario. [ upbeat music ] First, define your metadata and datasets to
be used in the scenario. You will need to set the units of measurement
for your Height and DEM Vertical units. The sample datasets provided by NOAA and FEMA are in feet so we will select “feet” for both dropdowns. Then, upload the Height data set by clicking
the “Browse Height” button and navigating to where you saved the sample data earlier. If you did not download the sample data already, do so now by clicking the link in the description
of this video. Navigate to your MSC hazard sample data, and
open “Level 1.gdb”. In this folder you will see two raster datasets. “gar_dem_ft” “gar_dem_ft” is a Digital Elevation Model with post-earthquake ground deformation and “gar_maxR_ft” is a runup height grid relative to mean sea level. Click the file named “gar_maxR_ft” and then
click “Select”. Next, click “Browse DEM” in the wizard dialog
and select “gar_dem_ft” from the same “Level
1.gdb”. Once both datasets appear in the center text
box, click “OK”, and Hazus will import them. Once imported, they will appear in your map
view. After confirming the data have appeared, click
“Next”. [ upbeat music ] It’s important to give your scenario a unique
and descriptive name for your future reference. For this example, we will name our scenario
“GaribaldiTSLevel1” so that we know this is a scenario in Garibaldi City for a tsunami
hazard of a level one analysis type. Once you have named your scenario, click “Next” and Hazus will create inundation boundaries and load the scenario. The boundaries include a Median Inundation
Depth in feet and a Median Momentum Flux in cubic feet per second squared. This may take several moments depending on
the sizes of your study region and datasets. When processing is complete, click “OK” to
return to the map view. Congratulations! In this video, you learned how to import user-defined data into Hazus to create a tsunami scenario. Look for more Hazus video tutorials on the
FEMA YouTube channel. [ upbeat music fades out ]

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