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Daily forcings & timestep settings (MODEL/SNOW/RUNOFF/FORCE_STEPS_PER_DAY) #963

@EthanBrooks2024

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@EthanBrooks2024

Dear VIC User Community,
I am running VIC Classic (version 5.0.1, Classic driver) with daily meteorological forcing data and encountered an issue related to timestep settings. When I attempt to run the model, it enters an infinite loop, and the log indicates the following requirements:

  1. SNOW_STEPS_PER_DAY cannot be smaller than 4.
  2. RUNOFF_STEPS_PER_DAY must equal SNOW_STEPS_PER_DAY.
  3. FORCE_STEPS_PER_DAY must also match SNOW_STEPS_PER_DAY.
  4. The model requires subdaily forcings (e.g., 3-hourly or 6-hourly) that must be consistent with the snow model timestep.

My questions are:

With only daily forcing data available, is it possible to run VIC Classic directly?
If it is feasible to use daily forcings to simulate daily runoff, how should I configure MODEL_STEPS_PER_DAY, SNOW_STEPS_PER_DAY, RUNOFF_STEPS_PER_DAY, and FORCE_STEPS_PER_DAY in the Global Parameter File?

Any guidance, references, or example configurations would be greatly appreciated.

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