Aplicaciones geofísicas mediante Tomografía de Resistividad Eléctrica para caracterizar los materiales sedimentarios del barrio Daniel Álvarez y su influencia en la dinámica del terreno

Abstract

Abstract: This research arises from the need to understand the instability problems affecting the sector known as Ciudadela Daniel Álvarez in the city of Loja, where residential buildings and road infrastructure have been impacted. The objective of this study is to characterize the subsurface in order to identify the geological conditions responsible for the instability. For this purpose, fieldwork was combined with the application of a geophysical method, specifically Electrical Resistivity Tomography (ERT).The collection of lithological data determined the distribution of different lithologies, mainly conglomerates and clay units. Based on electrical resistivity data acquired from three 240-meter profiles, resistive and conductive layers were identified, associated with varying degrees of soil saturation and potential groundwater levels that extend laterally throughout the study area.The unstable zone correlates spatially with the saturated zone, which defines the area of greatest impact. This condition had previously been identified through studies using the COOPER method and recorded through DGPS monitoring, which determined a ground displacement rate of 0.55 mm/year.