Limits for overtopping for pedestrians
| Hazard type and reason | Mean discharge Q: l/s per m | Max. volume* Vmax: l/m |
|---|---|---|
| Trained staff, well shod and protected, expecting to get wet, overtopping flows at lower levels only, no falling jet, low danger of fall from walkway | 1–10 | 500 at low level |
| Aware pedestrian, clear view of the sea, not easily upset or frightened, able to tolerate getting wet, wider walkway.† | 0·1 | 20–50 at high level or velocity |
| Hazard type and reason | Mean discharge | Max. volume |
|---|---|---|
| Trained staff, well shod and protected, expecting to get wet, overtopping flows at lower levels only, no falling jet, low danger of fall from walkway | 1–10 | 500 at low level |
| Aware pedestrian, clear view of the sea, not easily upset or frightened, able to tolerate getting wet, wider walkway. | 0·1 | 20–50 at high level or velocity |
These limits relate to overtopping velocities well below vc ≈ 10 m/s. Lower volumes may be required if the overtopping process is violent and/or overtopping velocities are higher.
Not all of these conditions are required, but nor should a single condition on its own require application of a more severe limit.
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