Defining representative night-time weathers

The set of three default weathers includes a D 5 m/s Weather, which is not applicable to the night. Delete this weather, leaving the Night Weather folder with two Weathers with a low windspeed of 1.5 m/s.

Setting up the Run Rows

To use the two sets of Weather data, you must set up separate Run Rows for day and night, and select the appropriate Weather folder for each Run Row.

You use the Run row grid Supertab to create and define Run Rows.

When you first move to the Supertab you will see that the value in the Models column is red-bordered and incomplete, as shown. This is because the workspace does not yet have any Scenarios (or “Models”) defined, so the selection of

Models for running is empty. As soon as you define a Scenario, the red border will disappear automatically.

Creating a second Run Row

This step is not applicable to Safeti Lite, since all Safeti Lite workspaces have two Run Rows.

Click on the Add button in the toolbar above the grid to add a second Run Row to the list. It will be created with the name Run Row (1), and with the same selections for input data as the first Run Row.

Click on the name of the first Run Row, and then type “Day” to change the name. Use the same method to change the name of the second Run Row to “Night”.

Setting the selection of Weather folders

Both Run Rows will initially have the selection for Weather Folder set to Day Weather.

Click in the Weather Folder cell for the Night row. The cell will turn into a dropdown field, and if you expand the field you will see all of the Weather folders listed, as shown.

Select Night Weather from the list, and then press [Enter] to commit the change.

Saving the changes to the workspace

Click on the Save icon in the far left of the title bar to save the changes you have made.

When you are ready you can proceed to the next chapter, which describes the process of setting up the Equipment items and Scenarios and performing the consequence analysis.