Soil Hydraulic Conductivity: CH to GM
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) |
|---|---|---|---|---|---|
| CH | Clay of high plasticity (fat clay) | practically_impermeable | 0 | 0 | 0 |
| CL | Clay of low plasticity | very_poor | 0.000001 | 0.00001 | 0 |
| GC | Clayey gravel | poor | 0.00001 | 0.0001 | 0.000001 |
| GC-CL | Clayey gravel (dual symbol) | poor | 0.00001 | 0.0001 | 0.000001 |
| GM | Silty gravel | fair | 0.0001 | 0.001 | 0.00001 |
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