滨海含水层的盐分弥散带及其变化  

THE SALT DISPERSION ZONE AND ITS MOVEMENT IN COASTAL AQUIFER

作　　者：吕贤弼[1] 

机构地区：[1]清华大学水电系

出　　处：《水文地质工程地质》1991年第5期34-37,24,共5页Hydrogeology & Engineering Geology

基　　金：水电部水电科学基金

摘　　要：本文应用移流弥散模型研究盐分弥散带及其动态变化,并与突变界面模型进行了比较。影响盐分分布及其变化的主要因素是弥散系数,咸水和淡水的密度差,淡水排海流量及含水层的特性。研究表明,弥散带的变动具有向内陆方向推进慢而向海洋方向消退快的特征,这一结论可应用于滨海地区的地下水资源管理和保护。本文采用基于分裂格式的特征线方法进行数值求解以消除数值弥数和振荡。The Salt dispersion zone and its movement are studied by means of a convection-dispersion model and by comparison with abrupt interface model. The determining factors are dispersion coefficient, density difference between Salt and fresh water, seaward discharge of fresh water and properties of aquifer. study reveals that the dispersion zone advanes slowly landwards but returns rapidly seawards. This conclusion can be applied to groundwater management and protection. The method of characteristics on the basis of the splitting scheme is used for numerical solution to eliminate numerical dispersion and oscillation

关 键 词：滨海 含水层 盐分 弥散带 变化 

分 类 号：P731.12[天文地球—海洋科学]