摘要
给出了稳态水流条件下,非均质土壤中考虑水动力弥散尺度效应以及不动水体存在时,一维溶质运移的两区模型。并在初始浓度为零,半无限一维空间内第一类边界条件下,推导出了可动区和不动区溶质相对浓度的解析表达式。给出了利用Matlab软件包计算相对浓度的计算方法,并对一假设试验情形进行了计算,从计算结果可以看出:该模型的模拟结果符合土壤中溶质运移的规律。最后,用特征有限元法对模型进行了数值计算,从而验证了所得解析解的正确性。
The tworegion model of 1D solute transport in heterogeneous soil considering scaledependent dispersion and immobile region under the condition of steady flow is studied.An analytical solution describing the concentration distributions both in mobile region and immobile region are deduced when initial concentration is zero and the boundary condition of the semiinfinite 1D space is the first kind.The analytical solution of an example is in good agreement with numerical calculation using characteristic finite element method,which is programmed by Matlab.
出处
《水利学报》
EI
CSCD
北大核心
2003年第10期44-50,共7页
Journal of Hydraulic Engineering
基金
国家自然科学基金资助项目(59879022)
