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Course objectives
Geophysical sounding is used for the remote detection and characterization of a target in the subsurface, producing images of its relevant properties for engineering, environmental, geological applications.
The course presents the seismic, electrical and electromagnetic investigation methods, from the fundamental theory up to the data collection and processing, with field lessons, computer lab sessions and presentation of case histories.
The students will acquire scientific competence for the design and the analysis of a geophysical survey, and base skills of geophysical data acquisition and processing.
Geophysical Imaging
Seismic methods
Elastic properties of rocks, Hooke law, elastic wave equation, Born approximation, diffraction tomography.
Refraction and reflection seismic methods: data acquisition and processing.
Traveltime tomography.
Examples of application and analysis of case histories.
Electrical and electromagnetic methods
Electrical properties of the rocks. Electromagnetic wave propagation in low loss media. Conduction and displacement currents.
Electrical prospecting: data acquisition and inversion. Resistivity method, self-potential method, induced polarization method.
Electromagnetic prospecting: data acquistion and interpretation. Conductivity meter, metal detector, VLF-EM method, AFMAG method, magnetotelluric method.
Ground Penetrating Radar: data acquisition and processing.
Examples of application and analysis of case histories.
Principles of rock physics
Physical properties of porous rocks and geophysical measurements: constitutive equations, rock properties estimation and observability.
Integrated applications of geophysical methods
Cooperative inversion, joint inversion.
Prerequisites
Introductory courses in signal processing and mathematics.
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Inglese