Example Data

mibitrans comes with three example data sets. A Table below provides an overview of all flow, transport and reaction parameters of the example data sets. Note that values marked with \(^*\) follow from relating other parameters, e.g. flow velocity from hydraulic conductivity, porosity and hydraulic gradient or linear decay rate from half-life time.

The standard example data set is chosen independent of a specific field site, but with values that reflect typical field settings. Furthermore, we show-case two field site data sets of the Bemidji site and Keesler site reflect settings of specific spill events. Find notebooks for these under Examples.

Quantity, Symbol (Unit)	Example data	Bemidji site	Keesler site
Hydraulic conductivity, K (m/d)	-	-	9.5
Hydraulic gradient, i (m/m)	-	-	0.003
Effective porosity, θ_e (-)	0.3	0.38	0.3
Groundwater flow velocity, v (m/d)	0.1	0.06	0.095*
Longitudinal dispersivity, α_x (m)	3	0.15	9.9
Transverse horizontal dispersivity, α_y (m)	0.02	0.015	1.0
Transverse vertical dispersivity, α_z (m)	0.005	0.0015	0
Soil bulk density, ρ_b (kg/m³)	1700	-	1700
Partition coefficient, K_oc (m³/kg)	0.053	-	0.038
Fraction organic carbon, f_oc (-)	0.001	-	5.7e-5
Retardation coefficient, R (-)	1.3*	1	1.01*
Half-life time (d)	0.5·365	∞*	0.15·365
Linear decay rate μ (1/d)	0.0038*	0	0.0127*
Source zone concentrations, C₀,i (g/m³)	[10, 4, 0.5]	6	[13.7, 2.5, 0.06]
Source zone boundaries, Y_i (m)	[5,10,20]	1	[2.1, 11.3, 19.8]
Source thickness, Z (m)	2	1	3.05
Total initial source mass, m_source (g)	∞	∞	2e6
Source decay rate γ_s (1/d)	0*	0*	1.67e-3*
Available oxygen, C_ΔO₂ (g/m³)	9	8	1.65
Available nitrate, C_ΔNO₃⁻ (g/m³)	6	0	0.07
Available sulfate, C_ΔSO₄²⁻ (g/m³)	5	0	22.4
Iron (II) concentration, C_Fe²⁺ (g/m³)	8	0	16.6
Methane concentration, C_CH₄ (g/m³)	4	0	6.6