Objective function analysis for electric soundings (VES), transient electromagnetic soundings (TEM) and joint inversion VES/TEM

Autor(es)

Bortolozo, Cassiano Antonio ^[1] ; Bokhonok, Oleg ^{[1, 2]} ; Porsani, Jorge Luis ^[1] ; Monteiro dos Santos, Fernando Acacio ^[3] ; Diogo, Liliana Alcazar ^[1] ; Slob, Evert ^[4]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer IAG, Dept Geofis, Sao Paulo - Brazil

^[2] Univ Catolica Santos UNISANTOS, Inst Pesquisas Cient & Tecnol Ipeci, Santos - Brazil

^[3] Univ Lisbon, Inst Don Luiz, Lisbon - Portugal

^[4] Delft Univ Technol, Dept Geotechnol, Delft - Netherlands

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF APPLIED GEOPHYSICS; v. 146, p. 120-137, NOV 2017.
• Citações Web of Science: 0

Resumo

Ambiguities in geophysical inversion results are always present. How these ambiguities appear in most cases open to interpretation. It is interesting to investigate ambiguities with regard to the parameters of the models under study. Residual Function Dispersion Map (RFDM) can be used to differentiate between global ambiguities and local minima in the objective function. We apply RFDM to Vertical Electrical Sounding (VES) and TEM Sounding inversion results. Through topographic analysis of the objective function we evaluate the advantages and limitations of electrical sounding data compared with TEM sounding data, and the benefits of joint inversion in comparison with the individual methods. The RFDM analysis proved to be a very interesting tool for understanding the joint inversion method of VES/TEM. Also the advantage of the applicability of the RFDM analyses in real data is explored in this paper to demonstrate not only how the objective function of real data behaves but the applicability of the RFDM approach in real cases. With the analysis of the results, it is possible to understand how the joint inversion can reduce the ambiguity of the methods. (C) 2017 Published by Elsevier B.V. (AU)

• Processo FAPESP: 09/08466-3 - Caracterização geoelétrica de aquíferos fraturados em basaltos na região de Bebedouro, SP, por meio de inversão conjunta de SEVs e sondagens TDEM
• Beneficiário: Jorge Luís Porsani
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/06404-0 - Inversão conjunta 1D e 2D de dados de Eletrorresistividade e TDEM aplicados em estudos de hidrogeologia na bacia do Paraná
• Beneficiário: Cassiano Antonio Bortolozo
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/15338-4 - Mapeamento de aquíferos fraturados em basaltos da Formação Serra Geral na região noroeste do estado de São Paulo, através de inversão conjunta 1D e 2D de dados de eletrorresistividade (SEV e CE) e sondagens eletromagnéticas no domínio do tempo (TDEM)
• Beneficiário: Jorge Luís Porsani
• Modalidade de apoio: Auxílio à Pesquisa - Regular