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Soil quality — Determination of the water-retention characteristic — Laboratory methods 土壤质量 - 水保留特性的确定 - 实验室方法
发布日期: 2019-09-21
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。 描述了四种方法,以涵盖土壤水压力的完整范围,如下所示: a) 使用沙子、高岭土或陶瓷吸盘测定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的基质压力的方法; d) 方法:使用加压气体和压力膜室测定从?33 kPa到?1500 kPa的基质压力。 给出了在特定情况下选择最合适方法的指南。
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.
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归口单位: ISO/TC 190/SC 3
相似标准/计划/法规
现行
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