Table 2 shows the parameter values of the OGS model used in this study. For variable density flow simulation, the difference between the density of saltwater and the fresh water is assumed to be 26 kg/m3 and the permeability reduction factor (Goswami & Clement 2007) is taken to be 0.001.
Final parameter set for OGS model simulations
| Parameters . | Upper layer . | Lower layer . |
|---|---|---|
| Porosity | 0.20 | 0.15 |
| Tortuosity | 1 | 1 |
| Isotropic permeability | 1 × 10−10 m2 | 1 × 10−12 m2 |
| Longitudinal dispersion length | 100 m | 100 m |
| Transverse dispersion length | 50 m | 50 m |
| Diffusion coefficient | 5 × 10−9 m2/s | 5 × 10−9 m2/s |
| Solid density | 2 × 103 kg/m3 | 2 × 103 kg/m3 |
| Viscosity | 1 × 10−3 kg/m/s | 1 × 10−3 kg/m/s |
| Parameters . | Upper layer . | Lower layer . |
|---|---|---|
| Porosity | 0.20 | 0.15 |
| Tortuosity | 1 | 1 |
| Isotropic permeability | 1 × 10−10 m2 | 1 × 10−12 m2 |
| Longitudinal dispersion length | 100 m | 100 m |
| Transverse dispersion length | 50 m | 50 m |
| Diffusion coefficient | 5 × 10−9 m2/s | 5 × 10−9 m2/s |
| Solid density | 2 × 103 kg/m3 | 2 × 103 kg/m3 |
| Viscosity | 1 × 10−3 kg/m/s | 1 × 10−3 kg/m/s |