安全与环境工程2024，Vol.31Issue(6)：189-199,11.DOI:10.13578/j.cnki.issn.1671-1556.20240218
含低渗透镜体包气带典型LNAPL迁移分布模拟研究
Numerical investigation on migration and distribution of a typical LNAPL in the vadose zone with low permeability lens
摘要
Abstract
With aiming at the problem of a small amount and short-term leakage in underground oil pipelines and oil storage tanks,methyl tert-butyl ether(MTBE)was selected as a typical Light Non-Aqueous Phase Liquid(LNAPL).Through physical model experiments and numerical simulations,the migration of MTBE in the vadose zone of porous media containing low-permeability lenses,as well as the retention in the lens were investigated.The time for LNAPL to migrate and the mass of LNAPL that remains in the lens were selected as the specific characteristic factors.Through statistical analysis of the simulation data,the dominant factors of each characteristic variable were identified,which indicates that the time required for MTBE to traverse the vadose zone is not only affected by hydrodynamic parameters of the vadose zone,but also controlled by its thickness;the quality of MTBE retained in the lenses is mainly affected by the hydrodynamic parameters of the matrix and lenses,as well as the volume of the lenses.The investigation results show that there is a good power function product statistical relationship between each of the characteristic factors and its related factors.This work will provide a reference for predictive models and research methods in emergency management and pollution prevention and control in LNAPL typical pollutant leakage events in the contaminated sites or areas.关键词
MTBE/LNAPL/包气带/低渗透镜体/砂柱试验Key words
MTBE/LNAPL/vadose zone/the low permeability len/sand column experiment分类
资源环境引用本文复制引用
穆童,王明玉,王月..含低渗透镜体包气带典型LNAPL迁移分布模拟研究[J].安全与环境工程,2024,31(6):189-199,11.基金项目
国家重点研发计划重点专项项目(2020YFC1807100) （2020YFC1807100）
