| bc | Boundary conditions |
| bda_d2fdx2 | Backward difference approximation for second order derivative |
| bda_dfdx | Backward approximation for first order derivative |
| cda_d2fdx2 | Central difference approximation for second order derivative |
| cda_dfdx | Central approximation for first order derivative |
| Cvh | Volumetric heat capacity (C) |
| Datm | Molecular diffusion coefficient for water vapor |
| dK_dz | Calculation of partial derivative of K(theta) to z |
| dmasswatervaporperunitvolumesoil_dt | time derivative of mass water vapor per unit volumen of soil |
| dQthetliq_dz | Calculation of derivative of flux of liquid water |
| dthetadz_dDtheliqdz | Calculation of producto of derivative of theta and D... |
| Dthetaliq | Formula for calculating Diffusion Coefficient of volumentric... |
| dtliq_d2Tdz2 | Product of second derivative of temperature and water... |
| fda_d2fdx2 | Forward difference approximation for second order derivative |
| fda_dfdx | Forward difference approximation of first order derivative |
| firstderivative_backwardiff | Partial first derivative in backward difference approximation |
| Fprima | Resitance of water vapor transport |
| gammat | gammat |
| K_theta | Hydraulic Conductivity (K (theta)) |
| lambda | Thermal conductivity (lambda) |
| mesh | Class mesh (mesh) |
| mult_dtdz_dDtlidz | Calculation of product of partial derivative of temperature... |
| porosity_factor | Porosity and tortuosity factor |
| prod_ftheta_datm | Calculation of product of porosity factor and molecular... |
| prod_ftheta_rho | Producto of density and porisity/tortuosity factor |
| prod_rho_datm | Product of density and molecular diffusion coefficient |
| prod_rhodatm_dfthetadz | Calculation of product of density , molecular diffusion... |
| prod_rho_datm_ftheta | Calculation of product of density, molecular coefficient of... |
| psi | Soil water potential (psi) |
| Qh | Heat flux Qh boundary condition |
| Q_theta_liq | Upward water flux boundary condition |
| Q_theta_vap | Upward vapor flux boundary condition |
| q_Ts | Saturation specific humidity at the soil surface temperature |
| relhumidity | Relative humidity (h) |
| rho_air | Air density : t_air in Kelvin, p in Pa |
| rho_w | Water Density in [Kg*m^-3] |
| sum1toi | Mesh's number of elements (sum1toi) |
| t_dist | time interval calculation |
| wvp_antoine | Specific humidity of air (qs) in Pa [kg*m^-1*s^-2] |
| xyz_dist | Mesh spatial coordinates |
