Hydrogeophysics deals with the use of geophysical measurements for estimating parameters and monitoring processes that are important to hydrological studies. In this research area, the focus is on the study of vadose zone processes using non-invasive imaging and hydrogeophysical methods. A wide range of methods is used, including electrical resistivity tomography (ERT), spectral induced polarization (SIP), electrical impedance tomography (EIT), magnetic resonance imaging (MRI) as well as x-ray computed tomography (XRCT).