Overview Parameters
Parameter used for transport modeling in mibitrans package with quantity name, mathematical symbol (used in equations), model input name and default unit. Sorted by parameter type. Quantities marked with a “*” are internally calculated and not defined by the user.
| Parameter | Symbol | mibitrans input | Unit |
|---|---|---|---|
| Settings in equations | |||
| Longitudinal position | \(x\) | - | m |
| Transverse horizontal position | \(y\) | - | m |
| Time | \(t\) | - | d |
| Contaminant concentration | \(C(x,y,t)\) | * | g/m\(^3\) |
| Hydrological parameters | |||
| Flow velocity | \(v\) | velocity | m/d |
| Hydraulic conductivity | \(K\) | h_conductivity | m/d |
| Hydraulic gradient | \(i\) | h_gradient | m/m |
| Effective porosity | \(\theta_e\) | porosity | - |
| Longitudinal dispersivity | \(\alpha_x\) | alpha_x | m |
| Transverse horizontal dispersivity | \(\alpha_y\) | alpha_y | m |
| Transverse vertical dispersivity | \(\alpha_z\) | alpha_z | m |
| Attenuation parameters | |||
| Retardation factor | \(R\) | retardation | - |
| Soil bulk density | \(\rho_b\) | bulk_density | kg/m\(^3\) |
| Partition coefficient | \(K_\mathrm{oc}\) | partition_coefficient | m\(^3\)/kg |
| Fraction organic carbon | \(f_\mathrm{oc}\) | fraction_organic_carbon | - |
| First order decay coefficient | \(\mu\) | decay_rate | 1/d |
| Contaminant half-life | \(t_{\frac{1}{2}}\) | half_life | d |
| Source parameters | |||
| Source zone width (from y = 0) | \(Y_i\) | source_zone_boundary | m |
| Source zone concentration | \(C_{0,i}\) | source_zone_concentration | g/m\(^3\) |
| Net source zone concentration | \(C_{0,i}^*\) | * | g/m\(^3\) |
| Total initial source mass | \(m_{s,0}\) | total_mass | g |
| Source thickness (from z = 0) | \(Z\) | depth | m |
| Model parameters | |||
| Model length | - | model_length | m |
| Model width | - | model_width | m |
| Model time | - | model_time | d |
| Length step size | - | dx | m |
| Width step size | - | dy | m |
| Time step size | - | dt | d |
| Instant reaction parameters | |||
| Delta oxygen concentration | \(C_{\Delta O_2}\) | delta_oxygen | g/m\(^3\) |
| Delta nitrate concentration | \(C_{\Delta NO_3^-}\) | delta_nitrate | g/m\(^3\) |
| Iron (II) concentration | \(C_{\Delta Fe^{2+}}\) | ferrous_iron | g/m\(^3\) |
| Delta sulfate concentration | \(C_{\Delta SO_4^{2-}}\) | delta_sulfate | g/m\(^3\) |
| Methane concentration | \(C_{\Delta CH_4}\) | methane | g/m\(^3\) |
| Utilization factor | \(UF\) | utilization_factor | g/g |
| Biodegradation capacity | \(BC\) | * | g/m\(^3\) |
| Other | |||
| Source depletion rate | \(\gamma_s\) | * | 1/d |
| Retarded flow velocity | \(v_R\) | * | m/d |