Detección y análisis de deslizamientos utilizando interferometría diferencial (D-Insar) entre los años 2015 y 2017 en las provincias norte y valderrama del departamento de Boyacá Colombia

Abstract

The susceptibility to landslides in Colombia has been increasing in recent years due to the increase in anthropogenic activities such as deforestation and changes in land use, geological and geomorphological conditions of the territory and the increase in precipitation in some areas of the country. According to the IDEAM and the SGC 18% of the national territory is in a zone of very high and high threat due to mass removal, a large part of this number corresponds to the eastern mountain range, which is notable for its instability due to the fracturing of the materials, associated with the presence of faults. In this mountain range are located the provinces North and Valderrama of the department of Boyaca that are classified as relief of type Erosional Structural Mountain and where many events have been presented and where many events have been presented. Taking this problem into account, it is proposed to apply D-InSAR differential interferometry, which uses RADAR SAR images to detect changes and displacements in the surface at the centimeter level, as an alternative technique to the existing methodologies in Colombia with the objective of analyzing the behavior of the landslides and to be able to evaluate the technique for the improvement of the risk management in the country, due to the methodologies current methodologies depend on field verification and optical images, which may present information lost in many areas on the country. As final products of the project are obtained coherence maps between interferometric pairs, displacement maps that show to detailed scale the Landslides and a temporal analysis of the events to identify the behavior of the zone.