Geo-Imaging and Monitoring Using Geophysical Techniques

The methodology of non-invasive geophysical investigation has been widely used in different fields such as geology, ground water, and petroleum exploration. In geotechnical engineering, geophysical techniques offer unique means of site characterization. However, how to produce preferred high-resolution data for imaging and monitoring in different scenarios remains a challenge. In this paper, new approaches are advanced aimed for high-resolution geo-imaging and monitoring based on the concept of electromagnetic theory and the method of Green's function. The Green's function can be used to solve inhomogeneous differential equations subject to specific boundary conditions. This approach can be combined with the traditional electrical resistivity tomography (ERT) to map sub-surface properties and monitoring evolution of spatial variability. The scenarios where this method can be applied include static situations and dynamic situations such as during earthquakes and landslides.