LNAPL在二维含水介质中运移规律的研究

摘要

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 homoge-neous media and homogeneous layered media .The pattern of LNAPL's migration and distribution in auriferous fol-low the advection-dispersion equation , and the dispersion coefficient of media is the main factor that influences the migration of LNAPL's contaminant .%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。