| ID | Number of map units | SOM map characteristics | NAEE (%) | |
| Map shape | Neighborhood function | SOM based Surrogate Model (Substituting groundwater flow and transport simulation models) | ||
| 1 | 50 × 50 | Rectangular | Gaussian | 43.8 |
| 2 | 75 × 75 | 31.3 | ||
| 3 | 100 × 100 | 30.4 | ||
| 4 | 110 × 110 | 30.9 | ||
| 5 | 120 × 120 | 30.4 | ||
| 6 | 130 × 130 | 29.8 | ||