d50
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 |
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