Long-term Simulations:Global parameters

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Global parameters for long-term simulations are defined by selecting Job Control from the GSSHA menu, while in the 2-D Grid module. This produces the GSSHA Job Control Parameter dialog box. Check Long-term Simulation and press the Edit Parameters... button and assign the following values in the Continuous Simulation dialog box.

  • Latitude – used in radiation calculations for missing data, decimal format (degrees).
  • Longitude – used in radiation calculations for missing data, decimal format (degrees).
  • GMT – deviation from Greenwich Mean Time (GMT) (+/- h), e.g.
    1. Pacific Standard Time is -8.
    2. Mountain Standard Time is -7.
    3. Central Standard Time is -6.
    4. Eastern Standard Time is -5
  • Minimum event discharge –discharge on the recession limb to stop event simulations when using GAR and to stop event accounting when using Richards’ equation to calculate infiltration (m3×s-1).
  • Soil moisture depth – depth of soil column over which evapotranspiration is distributed (m). For GAR, this is the total depth of the soil column from which ET can occur. For Richards’ equation, this is the maximum depth for distributing potential ET demand. See Chapter 11.
  • Hydrometeorological (HMET) Data File - name of hydrometeorological data file.
  • HMET Format - format of hydrometeorological data file. Toggle on either.
    1. Samson.
    2. Surface Airways.
    3. WES.

See the following discussion of Hydrometeorological Data.

Related Topics

GSSHA Wiki Main Page
Primer Main Page

Long-term Simulations
Global parameters
Infiltration model
Evapotranspiration model
Hydrometeorological data
Rainfall data