Joint Inversion of Apparent Conductivity and Magnetic Susceptibility to Characterize Buried Targets

Autor(es)

Santos, Vinicius R. N. ; Bortolozo, Cassiano A. ; Porsani, Jorge L.

• Tipo de documento: Artigo Científico
• Fonte: IEEE Geoscience and Remote Sensing Letters; v. 14, n. 6, p. 846-850, JUN 2017.
• Citações Web of Science: 0

Resumo

A good knowledge of the underground space is needed in urban planning. The main objects found buried are water and sewage pipes, cables, and contaminants storage tanks. Through the inversion of inductive electromagnetic data, we can obtain parameters like depth, position, and radius of these targets. Here, we show a joint inversion approach of apparent conductivity and magnetic susceptibility using data collected at the IAG/USP test site. The model employed assumes three coils (transmitter, receiver, and target/conductor) and relates the electromotive force, through the mutual inductance that occurs between the pairs of transmitter- receiver and conductorreceiver coils, to the acquired conductivity and susceptibility data. The achieved adjustment between field and calculated data indicates that, despite the simplicity of the model, it is a good representation of the conductors, increasing the results of the inversion process. The inversion algorithm is based on the controlled random search algorithm, which presented to be quite stable with electromagnetic data. The main advantage of the proposed approach is the relatively fast inversion process that showed better results than the traditional qualitative interpretation usually applied to this kind of investigation, being promising for noninvasive target characterization and having application in geotechnical studies. (AU)

• Processo FAPESP: 02/07509-1 - Caracterização geofísica de alvos rasos com aplicações no planejamento urbano, meio ambiente e arqueologia: estudo sobre o sítio controlado do IAG/USP
• Beneficiário: Jorge Luís Porsani
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/18209-6 - Combinação de inversão elétrica e eletromagnética para obtenção de parâmetros petrofísicos em alta resolução
• Beneficiário: Vinicius Rafael Neris dos Santos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado