read_soilparam

Author:

 Dag Lohmann

Date:

 January 1996

Description:

 This routine reads soil parameters for each grid cell.

References:

 

Input Variables:

Variable

Type

Units

Description

soilparam

FILE *

N/A

File pointer to the soil parameter file

 

Output Variables:

Variable

Type

Units

Description

 temp

soil_con_struct

N/A

Structure holds all soil parameters for a grid cell

  • gridcell - grid cell number [N/A]
  • lat - grid cell central latitude [degrees]
  • lng - grid cell central longitude [degrees]
  • b_infilt - infiltration parameter [N/A]
  • Ds - fraction of baseflow maximum velocity above which non-linear baseflow begins [fraction]
  • Dsmax - maximum baseflow velocity [mm/day]
  • Ws - fraction of maximum bottom layer moisture content above which non-linear baseflow begins [fraction]
  • c - infiltration exponent (default 2)
  • expt - 2/Bp+2 where Bp is the pore-size distribution, expt controls drainage between soil layers, and the maximum unfrozen water content [N/A] (values required for each soil layer in energy balance model)
  • Ksat - saturated hydraulic conductivity [mm/day] (values required for each soil layer in energy balance model)
  • init_moist - initial soil layer moisture (fraction of maximum layer moisture for water balance model [fraction]) (initial water content [mm/mm] for energy balance model)
  • elevation - grid cell average elevation [m]
  • depth - soil layer thickness [m] (energy balance model only)
  • avg_temp - soil column damping depth temperature [C] (energy balance model only)
  • dp - soil column damping depth [m] (energy balance model only)
  • bubble - bubbling pressure [cm] (energy balance model only)
  • quartz - quartz content [mm/mm] (energy balance model only)
  • bulk_density - bulk density [kg/m3] (energy balance model only)
  • soil_density - soil particle density [kg/m3] (default 2650) (energy balance model only)
  • time_zone_lng - central longitude of grid cell time zone [degrees] (energy balance model only)
  • Wcr - critical moisture content [mm]
  • Wpwp - wilting point moisture content [mm]
  • max_moist - soil layer maximum moisture content [mm]
  • rough - soil roughness length [m]
  • max_infil - maximum infiltration [N/A]

 

Subroutines Called:

 

Modifications and Limitations:

 Modified by Keith Cherkauer to read in more extensive parameters for the full energy balance version of the model.


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