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(Source: Maryland Dept. of Environment 1987 in Engineers Australia 2003)
Classification of particle size | Particle diameter (µm) | Settling velocities (mm/s) |
Very coarse sand | 2000 | 200 |
Coarse sand | 1000 | 100 |
Medium sand | 500 | 53 |
Fine sand | 250 | 26 |
Very fine sand | 125 | 11 |
Coarse silt | 62 | 2.3 |
Medium silt | 31 | 0.66 |
Fine silt | 16 | 0.18 |
Very fine silt | 8 | 0.04 |
Clay | 4 | 0.011 |
Surface Area Requirement
Surface area required by the previously fixed depth.
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