摘要
本文为三种简单的由多个含水层和弱透水层组成的越流含水系统建立了二维、准三维和三维数学模型,并对它们的解进行了比较分析。三种水流系统的二维、准三维及三维数学模型计算结果相互间的偏差随抽水时间的延长而增大,随井距的增大而减小;二维与准三维数学模型计算结果间的偏差随弱透水层越流系数的减小而减小;两种准三维数学模型计算结果间的偏差随抽水含水层与弱透水层间贮水系数比值的增大而减小;考虑弱透水层弹性释水的准三维模型与三维模型的解最为接近,它们之间的水头差当贮水系数比值一定时,随抽水含水层与弱透水层间渗透系数比值增大而减小,且随各向异性比值的增大而增大。
Two dimensional, quasi three dimensional, and three dimensional models were developed for three kinds of multilayered aquifer systems in which aquifers were separated from each other by aquitards. Comparing results of different numerical models of three kinds of multilayered aquifer systems showed that difference of results among two dimensional, quasi three dimensional model and three dimensional model increased with time, and decreased with radial distance from pumping well; difference of results between 2D model and quasi3D model only considering leakage decreases with coefficient of leakage decreasing; difference of results between two kinds of quasi three dimensional models decrease with storativity ratio of pumped aquifer to aquitards increasing; difference of results between quasi3D model considering storage in aquitards and 3D model is least, which decreases with hydraulic conductivity ratio of pumped aquifer to aquitards increasing if storativity ratio remaines constant, and increases in heterogenous leaky system.
出处
《水文地质工程地质》
CAS
CSCD
2003年第5期23-27,共5页
Hydrogeology & Engineering Geology
基金
国家自然科学基金(40172082)
