Evaluación interferométrica multi-temporal de la central hidroeléctrica minas San Francisco

Abstract

The construction of large infrastructure projects such as hydroelectric power plants can cause changes to the slopes of reservoirs. The Minas San Francisco hydroelectric power plant accounts for 3.62% of the demand of the national interconnected system in Ecuador. Therefore, it is necessary to constantly monitor the surrounding slopes to identify any displacement since its construction. The objective of this project is to evaluate the deformation of the terrain using interferometric techniques to identify areas prone to landslides at the hydroelectric power plant. The methodology used consisted of: i) information gathering, definition of the study area, and image download, ii) processing in Sentinel Applications Platform (SNAP), and iii) processing in ArcGIS Pro. Eight areas of greatest were identified in ascending, with an average annual deformation rate ranging from -0.020 m/year to -0.029 m/year, area number 6 being the largest affection area at 10,506.10 ha. Meanwhile, in the descending geometry, deformations ranging from -0.020 m/year to -0.025 m/year were calculated in 11 zones, zone 8 having the largest affection area at 3,674.91 ha. This work revealed ground movement with a significant horizontal component toward the west during 2018. Keywords: SBAS-DInSAR, instability, interferometry, landslides, Sentinel-1.