ISO 17313:2004 specifies a test method for laboratory measurement of the hydraulic conductivity of water-saturated porous materials using a flexible wall permeameter.

ISO 17313:2004 is applicable to undisturbed or compacted specimens that have a hydraulic conductivity between 1 x 10^-5 m/s (1 x 10^-3 cm/s) and 1 x 10^-11 m/s (1 x 10^-9 cm/s). Typical soil types falling in this category are clay, clay and sand tills, silt, peat, mud, etc.