Aplicación de técnicas de teledetección para el monitoreo de desplazamientos en el barrio las Rosas, cantón Nabón provincia del Azuay

Abstract

In the present degree work, landslide velocity (deformation) values in (LOS) were determined by using satellite images in the Rosas neighborhood, belonging to the Nabón canton; these images are of the radar type and were acquired in a period of time from 2018 to 2022 in both ascending and descending orbit. The images were processed using two methods: DInSAR and PSI/STAMPS, in order to obtain a better view of the behavior of the area before and after the landslide event. A deformation monitoring was implemented to determine the beginning of the event in March 2021, year in which a deformation of 25.06 cm per year in descending orbit and 21.81 cm in ascending orbit was generated with a deformation direction towards the northwest of the neighborhood. The PSI method generated pixel velocity values for the years 2018, 2019 and 2020 with values of -30.08, -14.8 and -29.04 mm/year respectively in descending orbit, orbit that was determined as the best to evaluate the behavior of the neighborhood. In 2021 and 2022, the number of pixels in the Rosas neighborhood was considerably reduced, which is why the velocity values obtained are not representative. These results were correlated with annual rainfall data, the values obtained determined that there is no apparent relationship between the occurrence of rainfall and the ground movement event.