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http://dx.doi.org/10.7843/kgs.2012.28.2.71

Analysis of Seepage Velocity in Unsaturated Weathered Soils Using Rainfall Infiltration Test  

Kim, Hoon (Dept. of Civil and Environmental Engrg., Univ. of Ulsan)
Shin, Ho-Sung (Dept. of Civil and Environmental Engrg., Univ. of Ulsan)
Kim, Yun-Tae (Dept. of Ocean Engrg., Pukyong National Univ.)
Park, Dug-Keun (National Disaster Management Institute)
Min, Tuk-Ki (Dept. of Civil and Environmental Engrg., Univ. of Ulsan)
Publication Information
Journal of the Korean Geotechnical Society / v.28, no.2, 2012 , pp. 71-78 More about this Journal
Abstract
Rainfall infiltration test under one dimensional condition is conducted to evaluate the effect of rainfall intensity on seepage velocity and infiltration characteristics for initial unsaturated sediment. Experimental results are compared with those numerical simulations with respect to variations of pore water pressure, degree of saturation and discharge velocity with time, and both results give good agreement. High rainfall intensity tends to increase seepage velocity almost linearly. But it shows rapid increase as rainfall intensity approaches saturated hydraulic conductivity of the sediment. In addition, the upper part of wetting front depth is partially saturated, not fully. Therefore, actual wetting front depth is considered to advance faster than theoretical prediction, which leads to slope instability of unsaturated slope due to surface rainfall.
Keywords
1D column test; Rainfall intensity; Seepage velocity; Unsaturated soil; Wetting front;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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