Caracterización del Movimiento de Masa en la zona de Cachi Alto – Cuturiví, Cantón Pujilí a través del estudio geológico de la deformación ocurrida entre los años 2017 a 2021.

Abstract

The Landslide is located on the eastern flank of the Western Cordillera, in the community of Cachi Alto - Cuturiví belonging to the Pujilí canton. In this investigation, photo-interpretation techniques, geodesic model were used with the purpose of determining the different morphological, geological and structural characteristics, in addition, to determine displacements, speeds and areas to be able to distinguish abrupt changes through the comparison of the images obtained between the years 2017 to 2021 by means of drone and satellite. The final results indicated that the zone is geologically characterized by lavas of andesite-basaltic composition, volcanoclastic and volcanosedimentary deposits, conglomeratic breccias, tuffaceous sandstones, shale and andesites, in the basal part a thick layer of Cangahua, alluvial and colluvial. related to the landslides under study. There are 3 slides: rotational slide, complex slide and a debris flow. In the landslides, control points with a NE-SW and N-S direction, cracks with a similar direction and with an E-W direction were located. The minimum control point has a speed of 0.08 m/month (PC2) located in a house within the reactivated landslide with an area of 142.30 km2 and the largest with a speed of 3.27 m/month (PC5) corresponding to the old highway that led Pujilí – Cachi Alto located in the active landslide with an area of 2.53 km2. The temporary seismic station installed in the study area gave results of the vibrations induced in the ground, of a total of 57 recorded events, 48 were recorded as small vibrations, so the landslide is not associated with active tectonic faults.