标准摘要
[中文适用范围]: 本文件规定了测定土壤保水特性的实验室方法。 本文件仅适用于干燥或解吸曲线的测量。 四种方法涵盖了完整的土壤水压力范围,如下: a) 使用沙子、高岭土或陶瓷吸力台测定 0 kPa 至 -50 kPa 基质压力的方法; b) 使用多孔板和滴定管装置测定 0 kPa 至 -20 kPa 基质压力的方法; c) 使用加压气体和压力板提取器测定-5 kPa至-1500 kPa基质压力的方法; d) 使用加压气体和压力膜电池测定-33 kPa至-1500 kPa的基质压力的方法。 给出了在特定情况下选择最合适方法的指南。 [外文原描述]: This document specifies laboratory methods for determination of the soil water-retention characteristic. This document applies only to measurements of the drying or desorption curve. Four methods are described to cover the complete range of soil water pressures as follows: a) method using sand, kaolin or ceramic suction tables for determination of matric pressures from 0 kPa to −50 kPa; b) method using a porous plate and burette apparatus for determination of matric pressures from 0 kPa to −20 kPa; c) method using a pressurized gas and a pressure plate extractor for determination of matric pressures from −5 kPa to −1 500 kPa; d) method using a pressurized gas and pressure membrane cells for determination of matric pressures from −33 kPa to −1 500 kPa. Guidelines are given to select the most suitable method in a particular case.
英文名称Soil quality — Determination of the water-retention characteristic — Laboratory methods