Hydrogeologic parameters inverse analysis based on pumping test by Comsol Multiphysics and Matlab

According to the results of the pumping test, the problems of back analysis of Hydrogeologic parameters are changed into the optimization problem of a nonlinear constrained programming. By secondary development tools of Comsol, the M-file script for numerical solution of seepage problems of file has been compiled to achieve the seamless converting of the finite element analysis and Matlab optimization solution and to solve the difficult problem for solution and the problem that the face analysis and back analysis of traditional permeability coefficients are independent. The calculation analysis of samples shows that the algorithm converges very fast and very precise.