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测定土壤的非饱和导水率的方法有多种。例如在不同毛管水压力下直接测定、或利用土壤性质从其它方面间接测定;一般来说,前者比较费时,且需要有高级的仪器设备,而后者正好弥补前者的不足。 本文介绍的方法称为“向上渗润法”,它利用不同吸力时土壤吸附水的各种速率来测定土壤的非饱和导水率。用这种方法测定一次所需的时间约为2个小时。
There are many ways to determine the unsaturated hydraulic conductivity of the soil. Such as direct determination under different capillary pressure of water or indirectly from other aspects using soil properties; in general, the former is time-consuming and requires advanced equipment, and the latter just to make up for the lack of the former. The method described in this paper is called the “upward infiltration method,” which uses the various rates of soil adsorption of water at different suction forces to determine the unsaturated hydraulic conductivity of the soil. The time required to measure once using this method is about 2 hours.