非均匀土壤中溶质运移的两区模型及其解析解  

Two-Region model for solute transport through heterogeneous soils and calculation of the analytical solution

作　　者：张德生[1] 沈冰[1] 沈晋[1] 王全九[1] 

机构地区：[1]西安理工大学水利水电学院水资源研究所,陕西西安710048

出　　处：《水科学进展》2003年第1期72-78,共7页Advances in Water Science

基　　金：国家自然科学基金资助项目(59879022)

摘　　要：给出了非均匀土壤中考虑水动力弥散尺度效应的一维溶质运移两区模型。然后在初始浓度为零,半无限一维空间内常数通量边界条件下,推导出了可动区和不动区溶质浓度分布的解析表达式。并用Mathematica软件包作了数值计算。计算结果表明,该模型的模拟结果符合溶质运移的一般规律,因而该模型在土壤溶质运移的研究和应用中有一定的价值。A tworegion model for 1D solute transport through heterogeneous soils considering scaledependent dispersion is studied, and an analytical solution describing the concentration distribution in the mobile region and immobile region is deduced under the initial concentration zero and a constant flux boundary condition of a semiinfinite 1D space The numerical computation is completed by the Mathematica software package

关 键 词：非均匀土壤 溶质运移 解析解 LAPLACE变换 BESSEL函数 Mathematica软件包 

分 类 号：S153.5[农业科学—土壤学]