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Study on Rainfall infiltration Characteristics for Weathered Soils: Analysis of Soil Volumetric Water Content and Its Application  

Kim, Man-Il (Geoleogical & Environmental Hazards Division, Korea Institute of Geoscience and Mineral Resources)
Chae, Byung-Gon (Geoleogical & Environmental Hazards Division, Korea Institute of Geoscience and Mineral Resources)
Cho, Yong-Chan (Geoleogical & Environmental Hazards Division, Korea Institute of Geoscience and Mineral Resources)
Seo, Yong-Seok (Department of Earth and Environmental Sciences, Chungbuk National University)
Publication Information
The Journal of Engineering Geology / v.18, no.1, 2008 , pp. 83-92 More about this Journal
Abstract
In order to analyze infiltration characteristics of rainfall in soil, two laboratory experiments were conducted using an amplitude domain reflectometry (ADR) sensor and a pore water pressure meter (PWP) in this study. The first experiment is to understand the dependency of volumetric water content and temperature for standard sand and weathered granite soil. The second experiment is a laboratory flume test with changes of rainfall condition. As the results of the dependency experiment, the volumetric water content is increased with increase of the output voltage measured by the ADR sensor in both the standard sands and weathered granite soil. Furthermore, the results also indicate necessity of consideration of the temperature dependency under the condition of high volumetric water contents from 0.15 to 0.45. In the flume test, two measurement devices are detected to the variation of volumetric water content and pore water pressure at the installation point of the flume. In especial, the measured values of ADR4 and PWP3 installed on the lower part of slope are higher than those of the others. It means that the lower part of slope plays a role of a runoff face and a beginning point of slope failure.
Keywords
volumetric water content; pore water pressure; dependency; flume test; amplitude domain reflectometry;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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