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http://dx.doi.org/10.7843/kgs.2018.34.3.5

Back Analysis of Unsaturated Hydraulic Conductivities for Transient Water Release and Imbibitions Measurement  

Oh, Seboong (Dept. of Civil Eng., Yeungnam Univ.)
Kim, Do-Hyung (Dept. of Civil Eng., Yeungnam Univ.)
Song, Young-Sug (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of the Korean Geotechnical Society / v.34, no.3, 2018 , pp. 5-12 More about this Journal
Abstract
Tests for transient water release and imbibitions measurement were conducted to estimate the unsaturated hydraulic conductivities by using back analysis. By using transient hydraulic characteristics, both the soil water retention curve and hydraulic conductivity fuction can be evaluated effectively and accurately. In this study the experiment for three samples were conducted accurately to measure the change of water content with time for various steps of matric suction. The back analysis calculated the amount of transient flow reliably in comparison with the experimental results. In the soil water retention curve there was no significant difference between the result of back analysis and that of experiment. The hydraulic conductivity function from back analysis was compared with the theoretical relation based on retention curve but they showed much difference. However, the unsaturated hydraulic behavior obtained by the combination of experimental and analytical techniques are considered to agree with the actual behavior.
Keywords
Unsaturated soil; Hydraulic conductivity; Soil water retention;
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