.BondLib.Examples.Biosphere.CWveg

Information

This model computes the evaporation of the vegetation. It uses the generic evaporation model together with an internal modulation computing the conductance of evaporation.


Parameters:

  ag:      Ground area of Biosphere (default value = 2368.9 m2)

  hai:     Convection coefficient equation intercept (default value = 39.6 kJ/(h.m2.K))

  avix:    Portion of Biosphere covered by vegetation (default value = 0.4)

  laix:    Leaf area index (default value = 2)

  lambda:  Latent heat of vaporization (default value = 2501 kJ/kg_water)

  rg:      Specific ground resistance of evaporation to vapor diffusion (default value = 0.0278 h.m2/kg_air)

  b1:      Stomatal resistance coefficient (default value = 20.3 kJ/kg_air)

  b2:      Specific canopy light reflection (default value = 61.2 kJ/(h.m2))

  taux:    Light adjustment factor (default value = 1)

  taup:    Canopy light extinction coefficient (default value = 0.6)

  pao:     Atmospheric pressure (default value = 87.848 kPa)


References:

  1. American Society of Heating, Refrigerating and Air-Conditioning Engineers (1997), ASHRAE Handbook of Fundamentals.
  2. Air Psychrometrics
  3. Kimball, B.A. (1986), A Modular Energy Balance Program Including Subroutines for Greenhouses and Other Latent Heat Devices, United States Department of Agriculture, ARS-33.

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