ID SWAT ID RHESSYS Variable Unities_Range Model HYDGRP Soil hydrologic group "A, B, C, or D" SWAT SOL_Z soil_depth Depth from soil surface to bottom of layer mm SWAT / RHESSYS SOL_BD Moist bulk density Mg/m3 or g/cm3 SWAT SOL_AWC Available water capacity of the soil layer mm H2O/mm soil SWAT SOL_K Ksat_0 Saturated hydraulic conductivity mm/hr SWAT / RHESSYS SOL_CBN Organic carbon content % soil weight SWAT SOL_CLAY clay Clay content % soil weight SWAT / RHESSYS SOL_SILT silt Silt content % soil weight SWAT / RHESSYS SOL_SAND sand Sand content % soil weight SWAT / RHESSYS SOL_ROCK Rock fragment content % total weight SWAT m Decay of saturated hydraulic conductivity with saturation deficit 1/ (metre of water) RHESSYS SOL_ZMX Maximum rooting depth of soil profile mm SWAT ANION_EXCL Fraction of porosity (void space) from which anions are excluded SWAT SOL_CRK Potential or maximum crack volume of the soil profile expressed as a fraction of the total soil volume. SWAT SOL_ALB albedo Moist soil albedo SWAT / RHESSYS USLE_K USLE equation soil erodibility (K) factor units: 0.013 (metric ton m2 hr)/(m3-metric ton cm) SWAT theta_psi_curve Choice of theta-psi curve 1 or 2 RHESSYS porosity_0 Porosity at soil surface range (0 - 1) RHESSYS porosity_decay Porosity scaling parameter with depth - porosity decays as 1/metre RHESSYS p3 Van.G. parameter - should be renamed - only used if theta_psi_curve is 2; dimensionless RHESSYS pore_size_index Soil pore size index dimensionless RHESSYS psi_air_entry Soil air entry pressure metres of water RHESSYS psi_max "Maximum soil water tension, psi, >psi_air_entry" metres of water RHESSYS 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 RHESSYS detention_store_size Surface detention storage capacity metres of water RHESSYS deltaZ Soil depth over which soil heat flux is computed - use 0 to ignore heat flux model metres RHESSYS active_zone_z Active zone for potential exfiltration calculations - a large number will cause saturation deficit to be used metres RHESSYS maximum_snow_energy_deficit Maximum degree day energy deficit accumulation for snowpack º C days RHESSYS snow_water_capacity Snowpack water holding capacity metres of water RHESSYS snow_light_ext_coef Radiation extinction coefficient through the snowpack - a high value will assume complete radiation absorption by snowpack dimensionless RHESSYS snow_melt_Tcoef Temperature melt coefficient metres of water / º C RHESSYS max_heat_capacity Maximum soil heat capacity - 0 will ignore heat flux model J/m3/º K RHESSYS min_heat_capacity Minimum soil heat capacity - 0 will ignore heat flux model J/m3/º K RHESSYS 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) RHESSYS N_decay_rate The decay rate of nitrogen throughout the profile kg N/m RHESSYS