Forward Electromagnetic Induction Modelling in a Multilayered Half-Space: An Open-Source Software Tool

被引:8
|
作者
Deidda, Gian Piero [1 ]
Diaz de Alba, Patricia [2 ]
Pes, Federica [3 ]
Rodriguez, Giuseppe [4 ]
机构
[1] Univ Cagliari, Dept Civil Environm Engn & Architecture, I-09123 Cagliari, Italy
[2] Univ Salerno, Dept Math, I-84084 Fisciano, Italy
[3] Univ Pisa, Dept Chem & Ind Chem, I-56124 Pisa, Italy
[4] Univ Cagliari, Dept Math & Comp Sci, I-09124 Cagliari, Italy
关键词
frequency domain electromagnetic method (FDEM); electromagnetic induction (EMI); nonlinear forward modelling; nonlinear inversion; sensitivity function; MATLAB Toolbox; graphical user interface; near surface geophysics; electric conductivity; magnetic permeability; MULTIFREQUENCY EM DATA; GAUSS-NEWTON METHOD; SOIL-SALINITY; ELECTRICAL-CONDUCTIVITY; MAGNETIC-SUSCEPTIBILITY; JOINT INVERSION; DEPTH; RESISTIVITY; LOOP; INSTRUMENT;
D O I
10.3390/rs15071772
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Electromagnetic induction (EMI) techniques are widely used in geophysical surveying. Their success is mainly due to their easy and fast data acquisition, but the effectiveness of data inversion is strongly influenced by the quality of sensed data, resulting from suiting the device configuration to the physical features of the survey site. Forward modelling is an essential tool to optimize this aspect and design a successful surveying campaign. In this paper, a new software tool for forward EMI modelling is introduced. It extends and complements an existing open-source package for EMI data inversion, and includes an interactive graphical user interface. Its use is explained by a theoretical introduction and demonstrated through a simulated case study. The nonlinear data inversion issue is briefly discussed and the inversion module of the package is extended by a new regularized minimal-norm algorithm.
引用
收藏
页数:36
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