ISO 11275-2004 土质.不饱和液体渗导性和水保持特性的测定.风蒸发法

标准号：ISO 11275-2004
中文标准名称：土质.不饱和液体渗导性和水保持特性的测定.风蒸发法
英文标准名称：Soil quality - Determination of unsaturated hydraulic conductivity and water-retention characteristic - Wind's evaporation method
标准类型：Z18
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：Z18
国际标准分类号：13.080.40
适用范围：This International Standard specifies a laboratory method for the simultaneous determination in soils of the unsaturated hydraulic conductivity and of the soil water-retention characteristic. It is applicable only to measurement of the drying or desorption curve. Application of the method is restricted to soil samples which are, as far as possible, homogeneous. The method is not applicable to soils which shrink in the range of matric head hm = 0 cm to hm = -800 cm. The range of the determination of the conductivity depends on the soil type. It lies between matric heads of approximately hm = -50 cm and hm = -700 cm. The range of the determination of the water-retention characteristic lies between matric heads of approximately hm = 0 cm and hm = -800 cm. NOTE 1 An infiltrometer method can be used to determine hydraulic conductivities near saturation. NOTE 2 ISO 11274 gives methods to determine the water-retention characteristic for matric heads between 0 cm and -15 000 cm.