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

IF 0.4 Q4 ENGINEERING, GEOLOGICAL
W. Hwang, H. Kim, Taehyung Kim
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引用次数: 0

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.
瞬态流作用下近海碎石丘护岸填埋场渗流-平流-弥散数值分析
本文研究了海岸垃圾填埋场堆石堆护岸屏障系统在瞬态水流作用下的污染物运动。屏障系统由底层屏障和侧屏障组成。底层系统采用不透水粘土层。对于侧阻挡系统,HDPE阻挡片(主元件)起主要作用,中间保护层(辅助元件)负责阻挡。采用SEEP / W和CTRAN / W程序对渗流、平流、弥散进行数值分析。因此,在考虑潮差波动的异常条件下,孔隙水流速矢量的体积和方向随时间而变化,污染物的弥散浓度也随之变化。对比2 m潮差和8 m潮差情况,异常情况下,潮差值越大,污染物浓度越高。研究发现,污染物浓度的变化率随潮差的变化而变化,因此污染物的流出量比稳定流动状态时要小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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