ON THE SIMULTANEOUS DETERMINATION OF DISPERSION AND NONLINEAR ADSORPTION PARAMETERS FROM DISPLACEMENT TESTS BY USING NUMERICAL-MODELS AND OPTIMIZATION TECHNIQUES

被引：5

作者：

GRATTONI, CA ^{[1
]}

DAWE, RA ^{[1
]}

BIDNER, MS ^{[1
]}

机构：

[1] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,LONDON SW7 2AZ,ENGLAND

来源：

ADVANCES IN WATER RESOURCES | 1993年 / 16卷 / 02期

关键词：

OPTIMIZATION TECHNIQUES; DISPERSION; ADSORPTION; DISPLACEMENT TESTS; NUMERICAL MODELS; PARAMETERS;

D O I：

10.1016/0309-1708(93)90003-X

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

The determination of the dispersion and adsorption parameters (either for the Freundlich or Langmuir adsorption isotherm models) can be determined by optimising the matching of the numerical solution of the adsorption-convection dispersion equation with the experimental effluent curves measured on displacement tests in core material using multivariable optimisation techniques. The numerical solutions are obtained by solving the convection-dispersion-nonlinear adsorption equation by finite differences using the Crank-Nicolson method with iterations to account for nonlinearities. The optimisation routines are used to find the parameters that give the global minimum error between predicted and measured effluent curves. The results show that whenever the three parameters (the dispersion coefficient and two adsorption parameters) are simultaneously determined, the solution is not unique and depends on the adsorption model used. The nonuniqueness can be removed by performing an independent test such as a static adsorption test.

引用

页码：127 / 135

页数：9

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