| Trends of erosion | Response (%) | X2 | P-value | |
| Intervention | Non-intervention | |||
| Increasing | 3 | 100* | 91.35 | 0.00 |
| Decreasing | 58* | 0 | - |
|
| No change | 39 | 0 | - |
|
| n | 100 | 100 |
|
|