Typical Values of Permeability for Different Soils
21st April 2020Typical Values of Permeability for Different Soils
The permeability or coefficient of permeability can be defined as the rate of flow of water through a unit cross-sectional area of the soil under a unit hydraulic gradient at a temperature of 
| Sl. No. | Different Types of Soil | Typical Value of Permeability |
| 1. | Gravel | 101 to 1 (100) |
| 2. | Coarse sand | 100 to 10-1 |
| 3. | Medium sand | 10-1 to 10-2 |
| 4. | Fine sand | 10-2 to 10-3 |
| 5. | Silty sand | 10-3 to 10-4 |
| 6. | Delhi silt | 7 X 10-5 |
| 7. | Boston blue clay | 6 X 10-7 |
| 8. | London clay | 1.5 X 10-9 |
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