摘要
为研究LNAPL(轻质非水相液体)污染物在均匀含水介质中的运移规律,本文建立微元模型推导出LNAPL在均匀含水介质中的对流--弥散方程。针对不同的介质模型,对二维对流--弥散方程运用差分法进行数值模拟,求其数值解。分析LNAPL污染物的运移特征,得出在均匀介质和非均匀层状介质中运移规律:LNAPL污染物在含水介质中的运移规律遵循对流--弥散方程,介质的弥散系数是影响LNAPL污染物运移的主要因素。
In order to study the pattern of Light Non-Aqueous Phase Liquid （LNAPL） contaminant＇s migration and diffusion in homogeneous aqueous media,an infinitesimal model was set to derive the dispersion equation for LNAPL contaminant in homogeneous aqueous media.The authors built different media models,numerical simulate 2-D advection-dispersion equation with finite difference method to get numerical solution,and analyzed the features of LNAPL contaminant＇s migration to get the pattern of LNAPL contaminant＇s migration and diffusion in the homogeneous media and homogeneous layered media.The pattern of LNAPL＇s migration and distribution in auriferous follow the advection-dispersion equation,and the dispersion coefficient of media is the main factor that influences the migration of LNAPL＇s contaminant.
出处
《世界地质》
CAS
CSCD
2014年第3期708-715,共8页
World Geology
基金
国家自然科学基金项目(41340039)
关键词
LNAPL污染物
对流-弥散方程
有限差分
数值模拟
LNAPL contaminant
advection-dispersion equation
finite difference
numerical simulation
