Code | Signification | Criteria | |
1 |
| Good quality | Monthly residual < 10 cm |
2 |
| Probably good | 10 cm ≤ Monthly residual < 15 cm |
3 |
| Probably bad | 15 cm ≤ Monthly residual < 20 cm |
4 |
| Bad quality | Monthly residual ≥ 20 cm |
9 |
| Data missing | Number of value < 15 |