Abstract

The simplified evaporation method (SEM) is frequently used for the determination of the hydraulic conductivity function (HCF) of the unsaturated soil. Usually, the mass of soil samples during evaporation is often monitored to calculate the flux. However, the balance is sensitive to the external conditions, such as the tensiometers connected by the cables to transmit data, and the cable will have a disturbing effect on the balance. In this study, a series of laboratory tests were conducted to obtain the hydraulic conductivity function of six kinds of soils, which texture ranged from sand to silty clay by using the alternative simplified evaporation method (ASEM) that reduces the sensitivity of the external environment brought by the balance. The volumetric water content near the centre depth was monitored by the soil moisture sensor, and the change of flux during evaporation was calculated by the volumetric water content. At the same time, for comparison, the mass was monitored during the evaporation process, and the mass of evaporated water was used to calculate the flux (SEM). The HCF obtained by the ASEM was consistent with that obtained by the SEM.

中文翻译：

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测量不饱和土壤导水率函数的另一种简化蒸发方法

摘要

简化蒸发法 (SEM) 经常用于测定非饱和土壤的导水率函数 (HCF)。通常，通常监测蒸发过程中土壤样品的质量以计算通量。但是天平对外界条件很敏感，如通过电缆连接的张力计传输数据，电缆会对天平产生干扰作用。本研究通过一系列室内试验，利用替代简化蒸发法 (ASEM) 降低了对外部环境的敏感性，获得了质地从沙土到粉质粘土的六种土壤的导水率函数。由余额。中心深度附近的体积含水量由土壤水分传感器监测，蒸发过程中通量的变化由体积含水量计算。同时，为了对比，在蒸发过程中监测质量，利用蒸发水的质量计算通量（SEM）。ASEM 获得的 HCF 与 SEM 获得的 HCF 一致。