摘要
针对多孔介质中水、气和非水相流体(NAPLs)的多相流动特点,建立了非水相流体(NAPLs)污染物迁移模型,分析了非水相流体在土壤非饱和区和地下水系统中的运移规律。通过有限元数值解对轻非水相流体和重非水相流体在土壤系统中的迁移过程进行模拟,得到了污染物的时空分布特征和污染范围。计算结果表明,数值模拟方法能够合理地描述非水相流体的运移过程和污染特征。土体渗透性和污染物残余饱和度是其重要影响因素。
Based on the theory for multiphase flow in porous media, analytical model for NAPL transport in soils is proposed and developed; and the transport behavior of NAPL in unsaturated soils and groundwater system is analyzed. Numerical simulation is employed to model the transport processes of LNAPLs and DNAPLs in subsurface system; and tempo-spatial distribution of NAPL and contamination extent are obtained. Numerical results show that the contamination characteristics of NAPLs can be reasonably described, which is significantly affected by intrinsic permeability of soils and residual saturation of NAPLs.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第5期951-955,共5页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.50209006)
欧洲联盟亚洲联系项目(No.CN010)
留学归国人员启动基金项目
关键词
非水相流体
数值模拟
污染物迁移
环境岩土工程
non-aqueous phase liquids （NAPLs）
numerical simulation
contaminant transport
geoenvironmental engineering
