How to load in dynamic evaporation rate (Water Overlay)

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For a Water Overlay, evaporation rate is defined in Weather) data.

Editor → Current Situation (Ribbon tab) → Overlays (Ribbon bar) → The Water Overlay (Left panel) → Configuration Wizard (Right panel)

How to load in dynamic rain and simulation time:

  1. Prepare a CSV file with a sequence of times and rain amounts. (See example below.)
  2. Open the configuration wizard of the Water Overlay.
  3. Continue to the step concerning weathers.
  4. Select the weather event you wish to update, or select "Add" to create a new one.
  5. Set the "Evaporation over Time" setting to "Custom".
  6. Select "Import". This will open the "Import CSV" window.
  7. Select "Import new CSV", and open your file.
  8. Answer the prompts regarding the format of your file.
  9. Verify that the data has been loaded in as expected. Take special note of the time format.
  10. Close the "Import CSV" window.
  11. Close the wizard.

Example CSV

A CSV file may look as follows:

3600,0.024
7200,0
9000,0.024
108000,0.048


Loading in this file, using seconds as the time unit, would lead to the following sequence of events:

  • During the first hour of simulation (3600 seconds), the evaporation rate is 24mm per day, or 1mm for 1 hour
  • Between the first and the second hour of the simulation, no evaporation occurs
  • During the next half hour, the evaporation is the same as during the first first hour (24mm per day, or 0.5mm during half an hour)
  • During the last half hour, the evaporation rate doubles compared to the previous half hour (48mm per day, which equals 2mm per hour or 1mm during half an hour)
  • After 3 hours, the evaporation rate does not change anymore.