| Which effect are visible on the environment | Frequency (n) | Percentage (%) | Scale of impacts | Frequency (n) | Percentage (%) |
| Turbidity and diversion of streams | 27 | 27.84 | Insignificant | 2 | 5.56 |
| Soil depression | 36 | 37.11 | Significant | 28 | 77.78 |
| Air pollution | 0 | 0 | Very significant | 6 | 16.66 |
| Creation of pools of water | 34 | 35.05 | |||
| Total | 97* | 100.00 | Total | 36 | 100.00 |