土壤中溶质运移的两区模型及准解析解  

Two-Region Model of Solute Transport Through Soils and Its Quasi-Analytic Solution

作　　者：张德生[1] 沈晋[1] 沈冰[1] 

机构地区：[1]西安理工大学理学院,水利水电学院陕西西安710048

出　　处：《西安理工大学学报》2002年第4期321-326,共6页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目 (5 98790 2 2 )

摘　　要：给出了非均质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。在初始浓度为零、半无限一维空间内常数通量边界条件下 ,推导出了可动区溶质浓度分布 Cm( x,t)和不动区溶质浓度分布 Cim( x,t)In this paper the two region model of one dimensional solute transport through heterogeneous soils considering scale dependent dispersion is studied, and an quasi analytic solution describing the concentration distribution at the mobile region C m(x,t) and immobile region C im (x,t) is deduced under the initial concentration zero and a constant flux boundary condition of a semi infinite one dimensional space.

关 键 词：土壤 溶质运移 两区模型 准解析解 LAPLACE变换 超几何函数 

分 类 号：S153.5[农业科学—土壤学]