三维砂槽中DNAPL入渗过程电阻率成像及数值模拟

蒋俊杰; 曹文翰; 刘汉乐

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (5) : 2513-2519.

水污染与控制

三维砂槽中DNAPL入渗过程电阻率成像及数值模拟

蒋俊杰, 曹文翰, 刘汉乐

作者信息 +

Electrical resistivity tomography and numerical simulation of DNAPL infiltration process in three-dimensional sand box

JIANG Jun-jie, CAO Wen-han, LIU Han-le

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文章历史 +

摘要

在三维砂箱中进行了饱和多孔介质中重非水相液体(DNAPL)的污染实验,并利用电阻率成像法(ERT)进行了同步的动态监测,获得DNAPL污染物空间分布的电阻率变化值图像,再根据砂箱实验建立数值模拟模型,与ERT测得的电阻率结果进行对比验证.结果表明:在不同空间上由数值模拟得到DNAPL污染物分布区域与ERT监测圈定的DNAPL污染物分布区域范围直径相对误差的绝对值为2.00%~27.50%.在不同时间点上由数值模拟得到DNAPL污染物分布区域与ERT监测圈定的DNAPL污染物分布区域范围直径相对误差的绝对值为2.7%~40.58%.结果说明了Petrasim程序预测三维饱和砂土中DNAPL污染分布范围的可行性.

Abstract

This research conducted an experiment on DNAPL contamination in a saturated porous medium within a threedimensional sandbox and performed synchronized dynamic monitoring using electrical resistivity tomography (ERT). The resistivity images obtained from ERT were used to determine the spatial distribution of DNAPL contaminants, which were then compared with the numerical simulation model established in the sandbox experiment. The absolute value of the relative error in the diameter of the DNAPL distribution area obtained from the numerical simulation and the DNAPL distribution area determined by the ERT monitoring ranged from 2.00% to 27.50% across different spatial locations.The absolute value of the relative error in the diameter of the DNAPL distribution area obtained from the numerical simulation and the DNAPL distribution area determined by the ERT monitoring ranged from 2.7% to 40.58% at different time points. The results demonstrate the feasibility of using the numerical simulation software Petrasim to predict the distribution range of DNAPL contamination in saturated sandy soil.

导出引用

蒋俊杰, 曹文翰, 刘汉乐. 三维砂槽中DNAPL入渗过程电阻率成像及数值模拟[J]. 中国环境科学. 2025, 45(5): 2513-2519

JIANG Jun-jie, CAO Wen-han, LIU Han-le. Electrical resistivity tomography and numerical simulation of DNAPL infiltration process in three-dimensional sand box[J]. China Environmental Science. 2025, 45(5): 2513-2519

中图分类号： X523

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