FINITE ELEMENT INVERSION OF HYDRAULIC PROPERTIES OF GRANITIC BODIES WITH LEAST NORM METHOD

Abstract

On building the model of the granite body including the faults, inverse analysis carried out to estimate three-dimensional hydraulic properties distribution. To estimate heterogeneous hydraulic properties, it is necessary that the model reflects the shape of the faults, and to discreate ill-posed problem caused by a number of unknown parameters. The authors developed inversion program using the finite element method to easily build fault model. In addition, we used least norm method to discreate ill-posed problem. The results of inverse analysis using in-situ pumping test data show the effectiveness of the least norm method with finite element method.