“…Electrical resistivity tomography (ERT) is one of the most widely used geophysical methods that can successfully be employed for geotechnical characterization, monitoring earthen dams and embankments, landfill monitoring, groundwater exploration, and mapping of contaminant plumes (e.g., Arosio et al, 2017;Bièvre et al, 2018;Chambers et al, 2006;Dahlin, 2020;Hermans & Paepen, 2020;Hojat et al, 2019a;Karimi-Nasab et al, 2011;Loke et al, 2020;Moradipour et al, 2016;Müller et al, 2010;Pollock & Cirpka, 2012;Supper et al, 2014;Tresoldi et al, 2019;Whiteley et al, 2017). The ERT inversion is nonlinear and ill-posed, thus meaning that the solution to this problem is nonunique due to the limited resolution and noise contamination in the acquired data.…”