土壤质量.非饱和水渗导性和水保持特性的测定.风的蒸发法
详细信息
- 中文主题词：土壤 ; 土壤普查 ; 水传导 ; 试验 ; 定义 ; 土壤组分 ; 数学计算 ; 解吸 ; 含水量 ; 测量 ; 土壤湿度计 ; 水分保持值 ; 均匀性 ; 保持指数 ; 土壤采样 ; 风
- 标准号：BS ISO 11275-2004
- 发布日期：2004-07-13
- 英文题名：Soil quality - Determination of unsaturated hydraulic conductivity and water-retention characteristic - Wind's evaporation method
- 英文主题词：Composition of the ground ; Definition ; Definitions ; Desorption ; Homogeneity ; Mathematical calculations ; Measurement ; Retention index ; Soil sampling ; Soil surveys ; Soils ; Tensiometers ; Testing ; Water conductivity ; Water content ; Water retention value ; Winds
- 标准状态：现行
- 发布单位：GB-BSI
- 实施日期：2004-07-13
- 国际标准分类号：13.080.40
- 载体形态：20P;A4
- 中国标准分类号：B11
- 国别：英国标准学会
文摘
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.