Soils

Variable Name	Description	Units
patch_default_ID	Identifier used by patch objects to indicate their patch default files	unique value for each default file
theta_psi_curve	Choice of theta-psi curve	1 or 2
Ksat_0	Saturated hydraulic conductivity at surface	metres/day
m	Decay of saturated hydraulic conductivity with saturation deficit	1/ (metre of water)
porosity_0	Porosity at soil surface	range (0 - 1)
porosity_decay	Porosity scaling parameter with depth - porosity decays as	1/metre
p3	Van.G. parameter - should be renamed - only used if theta_psi_curve is 2;	dimensionless
pore_size_index	Soil pore size index	dimensionless
psi_air_entry	Soil air entry pressure	metres of water
psi_max	Maximum soil water tension, psi, >psi_air_entry	metres of water
soil_depth	Maximum soil depth	metres
m_z	Decay of saturated conductivity with actual soil depth. If porosity does not scale with depth then m_z should be m/porosity_0	1/metres
detention_store_size	Surface detention storage capacity	metres of water
deltaZ	Soil depth over which soil heat flux is computed - use 0 to ignore heat flux model	metres
active_zone_z	Active zone for potential exfiltration calculations - a large number will cause saturation deficit to be used	metres
maximum_snow_energy_deficit	Maximum degree day energy deficit accumulation for snowpack	º C days
snow_water_capacity	Snowpack water holding capacity	metres of water
snow_light_ext_coef	Radiation extinction coefficient through the snowpack - a high value will assume complete radiation absorption by snowpack	dimensionless
snow_melt_Tcoef	Temperature melt coefficient	metres of water / º C
max_heat_capacity	Maximum soil heat capacity - 0 will ignore heat flux model	J/m3/º K
min_heat_capacity	Minimum soil heat capacity - 0 will ignore heat flux model	J/m3/º K
albedo	Soil albedo	range (0 - 1)
mobile_N_proportion	The proportion of available N that can be leached i.e. % nitrate N that is temorary and should be replaced	range (0 - 1)
N_decay_rate	The decay rate of nitrogen throughout the profile	kg N/m
sand	Fraction of the soil that is sand, where sand + clay + silt must equal 1	range (0 - 1)
clay	Fraction of the soil that is clay, where sand + clay + silt must equal 1	range (0 - 1)
silt	Fraction of the soil that is silt, where sand + clay + silt must equal 1	range (0 - 1)