EN ISO 11275:2014 Soil quality - Determination of unsaturated hydraulic conductivity and water-retention characteristic - Wind's evaporation method (ISO 11275:2004)
This International Standard specifies a laboratory method for the simultaneous determination of the unsaturated hydraulic conductivity and the water retention capacity of a soil. It can only be used to determine the drying or desorption curve. Application is limited to soil samples that are as homogeneous as possible. It is not applicable to soils that can shrink within the following matrix heights: hm = 0 cm to hm = -800 cm. The determination range of conductivity depends on the soil type. It lies between matrix heights of approximately hm = -50 cm and hm = -700 cm. The determination range of the water retention capacity is approximately between hm = 0 cm and hm = -800 cm. NOTE 1 An infiltrometer method can be used to determine the hydraulic conductivity near the saturated region. NOTE 2 ISO 11274 contains methods for determining the water retention capacity at matrix heights between 0 cm and -15000 cm.
EN ISO 11275:2014 Referenced Document
ISO 10381-1:2002 Soil quality - Sampling - Part 1: Guidance on the design of sampling programmes
ISO 10381-4:2003 Soil quality - Sampling - Part 4: Guidance on the procedure for investigation of natural, near-natural and cultivated sites
ISO 11274:1998 Soil quality - Determination of the water-retention characteristic - Laboratory methods
ISO 11276:1995 Soil quality - Determination of pore water pressure - Tensiometer method
ISO 11461:2001 Soil quality - Determination of soil water content as a volume fraction using coring sleeves - Gravimetric method
EN ISO 11275:2014 history
2014EN ISO 11275:2014 Soil quality - Determination of unsaturated hydraulic conductivity and water-retention characteristic - Wind's evaporation method (ISO 11275:2004)