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Efficient 2D Inversion Of Long Ert Sections
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 21st EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, Apr 2008, cp-177-00131
Abstract
In this work a new algorithm for the efficient 2D inversion of long ERT lines is introduced. The algorithm incorporates an experimental procedure to avoid calculation and storage of the entire Jacobian matrix. This approach speeds up the Jacobian matrix calculations and also reduces the required memory resources to store it. The efficient storage of the sparse Jacobian and Smoothness matrices and the efficient inversion using the LSQR method increase significantly the inversion speed. The application of the new algorithm to synthetic and real data sets resulted in reconstructed models of comparable accuracy to the standard inversion approach.