Soil Hydraulic Conductivity: SM-SL to SW
Soil hydraulic conductivity (permeability) and drainage classification by USCS soil type — typical, min, and max values in cm/s
| uscs type | description | drainage class | hydraulic conductivity cm s (cm/s) | hydraulic conductivity max cm s (cm/s) | hydraulic conductivity min cm s (cm/s) |
|---|---|---|---|---|---|
| SM-SL | Silty sand (dual symbol) | fair | 0.0001 | 0.001 | 0.00001 |
| SP | Poorly graded sand | good | 0.01 | 0.1 | 0.001 |
| SW | Well-graded sand | good | 0.01 | 0.1 | 0.001 |
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