Sedimentation takes place over varying periods, from days to years:
| Level 3 T1 | Level 3 T2 | Level 4 T2 |
| Natural/Artificial Water | Natural/Artificial Water | Increase in turbidity |
| Reduction in water depth | ||
| Reduction in hydro-period | ||
| Natural water | Bare surface | |
| Artificial water | Bare surface |