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http://dx.doi.org/10.12814/jkgss.2020.19.4.001

Seepage-Advection-Dispersion Numerical Analysis of Offshore Rubble Mound Revetment Landfill Under Transient Flow  

Hwang, Woong-Ki (Geo R&D Co., Ltd.)
Kim, Hyang-Eun (Geo R&D Co., Ltd.)
Kim, Tae-Hyung (Dept. of Civil Engrg., Korea Maritime and Ocean Univ.)
Publication Information
Journal of the Korean Geosynthetics Society / v.19, no.4, 2020 , pp. 1-9 More about this Journal
Abstract
This study analyzes contaminant movement under transient flow in a rubble mound revetment offshore waste landfill barrier system that prevents contaminant runoff. The barrier system consists of bottom layer and side barrier. For the bottom layer system, impermeable clay layer is used. For the side barrier system, the HDPE barrier sheet (primary element) plays the main role, and the intermediate protection layer (supplementary element) is responsible for the barrier. Seepage, advection, dispersion numerical analysis was carried out using SEEP / W and CTRAN / W programs. As a result, under abnormal conditions considering the fluctuation in tidal range, the volume and direction of the flow velocity vector of the pore water change with time and the dispersion concentration of the contaminant changes. When comparing the case of 2 m tidal range and 8 m tidal range, the larger the tide value, the higher the concentration of contaminant under abnormal conditions. It was found that the rate of change of the concentration of the contaminant changed depending on the change in the tidal range, and as a result, the outflow of the pollutant was smaller than that in the steady flow state.
Keywords
Offshore landfill; Bottom layer; HDPE sheet; Transient flow; Tidal range;
Citations & Related Records
Times Cited By KSCI : 10  (Citation Analysis)
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