用一步出流法测定土壤的导水参数

Determination of Hydraulic Parameters of Unsaturated Soils with the One-Step Method

采用一次加压出流法测定土壤水分运动参数——土壤水扩散率的方法,结合逐次加压法,测定土壤水分特征曲线,便可求出土壤的非饱和导水率K(θ),方法简便,概念明确,仪器设备简单,一次试验可以同时测得非饱和土壤水分运动的全部参数。

The one-step method with a pressure plate sample is used to determine theparameters of soil moisture movement--the method of soil moisture diffusivity. Whenthe method in connection with additional progressive pressure is adopted,other parameters such as the characteristic curve of soil water,soil capacity and hydraulic conductivity can be measured. The method is simple and the concept is clear Instruments and equipment are simple. All the parameters concerning the movement of unsaturated soil water may be determined at the same time within one experiment.