Channel median sediment size
The table below lists the D50 values of different sediment classes:
| Sediment class | Size [µm] | Approximate size |
|---|---|---|
Boulders
> 256,000
> Volley ball
Cobbles
> 64,000
> Tennis ball
Pebbles
> 2,000
> Match Head
Coarse Sand
1,500
Medium Sand
375
Fine Sand
94
Coarse Silt
47
Medium Silt
11.7
Not visible to the human eye
Fine Silt
4.9
Clay
1.95