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Unsaturated hydraulic conductivity of a siltyudsand with the instantaneous profile method

机译:粉质 ud的不饱和水力传导率瞬时轮廓法砂

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摘要

The unsaturated hydraulic conductivity of a silty sand at different initial void ratios is measured using the instantaneous profile method. The variation of the suction and volumetric water content is recorded during the infiltration process as a function of time. Accordingly, an infiltration column was developed with a height of 600 mm and an inner diameter of 170 mm. The suction and volumetric water content were measured simultaneously every 100 mm along the column by means of small tensiometers and TDRs, respectively. Hydraulic conductivity is calculated by dividing the water flow velocity by the hydraulic gradient. The soil is reconstituted from Ruedlingen (Canton Schaffhausen, Switzerland), where landslide triggering experiments were carried out in October 2008 and March 2009. The hydraulic conductivity functions are determined and the laboratory values are compared to the in-situ measurements of hydraulic conductivity carried out in the course of the landslide triggering experiments.
机译:使用瞬时剖面法测量了不同初始孔隙率下粉质砂的不饱和水力传导率。在渗透过程中记录吸水量和体积水含量随时间的变化。因此,开发了具有600mm的高度和170mm的内径的渗透柱。沿色谱柱每100毫米同时使用小型张力计和TDR同时测量吸水量和体积水含量。通过将水流速除以水力梯度来计算水力传导率。从Ruedlingen(瑞士沙夫豪森州)重建土壤,在2008年10月和2009年3月进行了滑坡触发实验。确定了水力传导函数,并将实验室值与水力传导率的现场测量结果进行了比较在滑坡触发实验过程中。

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