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http://dx.doi.org/10.9765/KSCOE.2018.30.2.61

Evaluation of Optimal Performance of Hydraulic Barriers in Offshore Landfill using Seepage-Advection-Dispersion Analysis under Steady State Flow  

Hwang, Woong-Ki (Dept. of Civil Eng., Korea Maritime and Ocean Univ.)
Oh, Myoung-Hak (Coastal Disaster Prevention Research Center, Korea Institution of Ocean Science & Technology)
Kim, Tae-Hyung (Dept. of Civil Eng., Korea Maritime and Ocean Univ.)
Kim, Hyang Eun (Geo R&D Co. Ltd.)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.30, no.2, 2018 , pp. 61-68 More about this Journal
Abstract
This study was conducted to propose the optimum minimum requirement of cutoff system composed of the impermeable soil layer and vertical barrier in offshore landfill for prevention pollution leakage by seepage, advection, and dispersion numerical analyses under steady state. According to the study results, the minimum requirement of impermeable soil layer is below $1{\times}10^{-6}cm/s$ of hydraulic conductivity with more than 500 cm thickness or a system with equivalent cutoff effect. The minimum requirement of vertical barrier is below $1{\times}10^{-6}cm/s$ of hydraulic conductivity with more than 50 cm thickness or a system with equivalent cutoff effect. In addition, the vertical barrier should be embedded enough to seal securely with the impermeable soil layer for working cutoff effect.
Keywords
offshore landfill; vertical barrier; impermeable soil layer; seepage; advection; dispersion;
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