Soil Permeability Coefficient (2)
Estimated values for the permeability of different types of soil.
Table:
Permeability coefficients k for various soil types [Graßh82]
| Soil type | k [m/s] | |
|---|---|---|
| Limits | Predominantly | |
| cobbles | 10-1 to 5 | |
|
coarse gravel medium gravel fine gravel |
10-2 to 1 10-4 to 10-2 |
3.5 x 10-2 2 x 10-2 to 3 x 10-3 |
|
coarse sand medium sand fine sand sand, loam, silt |
10-5 to 10-2 10-6 to 10-3 10-6 to 10-3 10-7 to 10-4 |
10-4 to 10-3 10-4 10-5 to 10-4 10-6 |
| silt | 10-9 to 10-5 | 10-9 to 10-7 |
| loess | 10-10 to 10-5 |
undisturbed: 10-5 disturbed: 10-10 to 10-7 |
| loam | 10-10 to 10-6 |
10-9 to 10-8 silty: 10-9 to 10-8 |
| clay | 10-12 to 10-8 |
lean: 10-10 to 10-9 rich: 10-12 to 10-10 |
Permeability coefficient subject to the grading curves.
