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http://dx.doi.org/10.7843/kgs.2008.24.3.53

Digital Image Analysis (DIA) for Estimating the Degree of Saturation of The Soil-Water Characteristic Curves (SWCC)  

Min, Tuk-Ki (Dept of Civil Engrg., Univ. of Ulsan)
Huy, Phan Thieu (Dept. of Civil Engrg., Univ. of Ulsan)
Publication Information
Journal of the Korean Geotechnical Society / v.24, no.3, 2008 , pp. 53-63 More about this Journal
Abstract
The aim of this study was to validate the suitability of an digital image analysis (DIA) method to measure the degree of saturation in the unsaturated conditions. This study was carried out on the Joo-Mun-Jin standard sand. A one-dimensional sand column test was used in the constant water level condition to get the correlation equation between the color number ($C_n$) and the measured degree of saturation (5). In addition, the hanging wale. column technique to determine the soil-water charactenstic curve (SWCC) was performed in a Buchner funnel. The average degree of saturation ($S_{ave}$) in the SWCC could be obtained by substituting average color number at each suction head value with the $C_n\;-\;S$ correlation equation. Comparisons were made between the measured results by the hanging water column test and those obtained from DIA method. Results showed that the DIA method tested here provided fairly good saturation distribution values in the drying and wetting processes.
Keywords
Average color number; Correlation equation; Degree of saturation; DIA; SWCC;
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