Difference between revisions of "Soils"
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| − | + | | align="center" style="background:#f0f0f0;"|'''Variable Name''' | |
| − | + | | align="center" style="background:#f0f0f0;"|'''Description''' | |
| − | + | | align="center" style="background:#f0f0f0;"|'''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) | |
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Revision as of 15:56, 12 October 2009
| 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) |
