Análisis de susceptibilidad de riesgo por deslizamiento de tierra mediante fotogrametría con drones, en la parroquia Belisario Quevedo, bosque antenas del Pichincha

Abstract

The present investigation was conducted to analyze the susceptibility of landslides for the activities anthropogenic or natural in Pichincha Antennas Forest of the DMQ. In the actuality the landslides happen more frequently, either due to climatic conditions such as continuous rainfall, or due to natural events such as earthquakes generating concern for the population. To carry out this study used an unmanned aerial vehicle (UAV), was used to get geographic information on areas of difficult access and collect data where there are very small landslides. The flights were carried out during the months of October, November and December with the objective of determining the possible direction and modification of the location coordinates of the developed model. Approximately 400 photographs were analyzed in each period, in addition, a dual-frequency differential GPS was used to place the 7 ground control points, whose coordinates were obtained with the static GNSS method. To process the images obtained, the PIX4D software was used, in each period the information of root mean square error (RMS) and Ground Sampling Distance (GSD) was collected, as outputs of the processing, a digital model of the surface and orthomosaic was obtained for the location and height. The results obtained from the first period the maximum RMS = 0.0235m and GSD 0.0352m, for period 3 maximum RMS of 0.0132 m and GSD of 0.0304 m were obtained, the comparison of movements between the period T3 and T1, the value of two-dimensional displacement was 1.7 m and the variation of the heigtht of 1.031m.