| Specific permebility, k, darcys | ||||||||||||||
|
| 105 | 104 | 103 | 102 | 10 | 1 | 10−1 | 10−2 | 10−3 | 10−4 | 10−5 | |||
| Soil class | Clean gravels | Clean sands; mixtures of clean sands and gravels | Very fine sands; silts; mixtures of sand, silt, and clay; stratified clays; etc. | Unweathered clays | ||||||||||
| Flow characteristics | Good aquifers | Poor aquifers | Impervious | |||||||||||
|
|
| 106 | 105 | 104 | 103 | 102 | 10 | 1 | 10−1 | 10−2 | 10−3 | 10−4 | ||
| Laboratory coefficient of permeability, Ks, gal/day/ft2 | ||||||||||||||